GET https://kbin.spritesserver.nl/m/askelectronics@discuss.tchncs.de/t/749/Can-I-switch-this-constant-current-LED-driver-at-38kHz/active

Response
200 OK
IP
3.149.234.94
Profiled on
Token
b201e1

Security

Token

There is no security token.

Firewall

main Name
Security enabled
Stateless

Configuration

Key Value
provider security.user.provider.concrete.app_user_provider
context main
entry_point App\Security\KbinAuthenticator
user_checker App\Security\UserChecker
access_denied_handler (none)
access_denied_url (none)
authenticators 
[
  "two_factor"
  "remember_me"
  "App\Security\KbinAuthenticator"
  "App\Security\FacebookAuthenticator"
  "App\Security\GoogleAuthenticator"
  "App\Security\GithubAuthenticator"
  "App\Security\KeycloakAuthenticator"
]

Listeners

Listener Duration Response 
Symfony\Component\Security\Http\Firewall\ChannelListener {#723
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
  -logger: Monolog\Logger {#783 …}
  -httpPort: 80
  -httpsPort: 443
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\ContextListener {#706
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …}
  -sessionKey: "_security_main"
  -logger: Monolog\Logger {#783 …}
  -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …}
  -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
  -registered: false
  -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …}
  -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}
}
 0.25 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.04 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy
# Voter class
1 
"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4 
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5 
"App\Security\Voter\EntryCommentVoter"
6 
"App\Security\Voter\EntryVoter"
7 
"App\Security\Voter\MagazineVoter"
8 
"App\Security\Voter\MessageThreadVoter"
9 
"App\Security\Voter\MessageVoter"
10 
"App\Security\Voter\NotificationVoter"
11 
"App\Security\Voter\OAuth2UserConsentVoter"
12 
"App\Security\Voter\PostCommentVoter"
13 
"App\Security\Voter\PostVoter"
14 
"App\Security\Voter\UserVoter"

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
App\Entity\Entry {#2388
  +user: Proxies\__CG__\App\Entity\User {#1943 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
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    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
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    +awards: Doctrine\ORM\PersistentCollection {#61 …}
    +categories: Doctrine\ORM\PersistentCollection {#1820 …}
    -id: 11
    +apId: "askelectronics@discuss.tchncs.de"
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      date: 2024-09-25 09:01:54.0 +02:00
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      date: 2023-06-19 05:13:29.0 +02:00
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  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Can-I-switch-this-constant-current-LED-driver-at-38kHz"
  +title: "Can I switch this constant current LED driver at 38kHz?"
  +url: null
  +body: """
    My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
    \n
    I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
    \n
    I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
    \n
    I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
    \n
    Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
    \n
    I’d love to hear your thoughts about how I should go about this. Thanks
    """
  +type: "article"
  +lang: "en"
  +isOc: false
  +hasEmbed: false
  +commentCount: 6
  +favouriteCount: 3
  +score: 0
  +isAdult: false
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    date: 2023-07-04 05:15:52.0 +02:00
  }
  +ip: null
  +adaAmount: 0
  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1866 …}
  +votes: Doctrine\ORM\PersistentCollection {#1978 …}
  +reports: Doctrine\ORM\PersistentCollection {#1946 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1971 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2443 …}
  +badges: Doctrine\ORM\PersistentCollection {#2426 …}
  +children: []
  -id: 749
  -titleTs: "'38khz':10 'constant':5 'current':6 'driver':8 'led':7 'switch':3"
  -bodyTs: "'/assets/datasheets/pam2804.pdf)':110 '/media/resource/hires/osram-dam-5723342/sfh%204727as_en.pdf))':15 '/sites/default/files/res/data_sheets/ao3400a.pdf)':84 '1a':53 '38khz':45 '4727as':12 '5v':52 '5w':67 'agre':100 'alreadi':28 'ao3400a':81 'aosmd.com':83 'aosmd.com/sites/default/files/res/data_sheets/ao3400a.pdf)':82 'carrier':42 'close':64 'constant':111 'control':17,20 'current':112 'd':152 'dammedia.osram.info':14 'dammedia.osram.info/media/resource/hires/osram-dam-5723342/sfh%204727as_en.pdf))':13 'decid':90 'devic':21 'dim':139 'drive':5,60 'driver':97,114 'en':129,132 'exampl':23 'first':73 'flicker':150 'frequenc':43 'go':162 'goal':2 'hear':155 'howev':48 'infrar':7 'ir':18 'led':8,62,96,113 'like':9,58,79 'limit':49,69 'look':104 'love':153 'm':103,117 'mean':143 'meant':135 'microcontrol':37 'mosfet':78 'output':29,145 'pam2804':107 'pin':34,130,133 'possibl':71 'power':54 'prevent':149 'psu':68 'pwm':138 'pwm-dim':137 'remot':19 'resistor':88 'sfh':11 'signal':31,39,126 'smooth':147 'suppli':55,124 'sure':119 'thank':165 'thought':74,157 'togeth':85 'tv':25 'use':76,94 'worth':93 'would':57 'www.diodes.com':109 'www.diodes.com/assets/datasheets/pam2804.pdf)':108"
  +cross: false
  +upVotes: 0
  +downVotes: 0
  +ranking: 1688452507
  +visibility: "visible             "
  +apId: "https://discuss.tchncs.de/post/465080"
  +editedAt: null
  +createdAt: DateTimeImmutable @1688424007 {#1850
    date: 2023-07-04 00:40:07.0 +02:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\Entry {#2388
  +user: Proxies\__CG__\App\Entity\User {#1943 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 154
    +entryCommentCount: 1230
    +postCount: 1
    +postCommentCount: 4
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729413608 {#276
      date: 2024-10-20 10:40:08.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
    +entries: Doctrine\ORM\PersistentCollection {#181 …}
    +posts: Doctrine\ORM\PersistentCollection {#139 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#201 …}
    +bans: Doctrine\ORM\PersistentCollection {#118 …}
    +reports: Doctrine\ORM\PersistentCollection {#104 …}
    +badges: Doctrine\ORM\PersistentCollection {#82 …}
    +logs: Doctrine\ORM\PersistentCollection {#72 …}
    +awards: Doctrine\ORM\PersistentCollection {#61 …}
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    -id: 11
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    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1727247714 {#270
      date: 2024-09-25 09:01:54.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1687144409 {#272
      date: 2023-06-19 05:13:29.0 +02:00
    }
  }
  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Can-I-switch-this-constant-current-LED-driver-at-38kHz"
  +title: "Can I switch this constant current LED driver at 38kHz?"
  +url: null
  +body: """
    My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
    \n
    I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
    \n
    I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
    \n
    I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
    \n
    Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
    \n
    I’d love to hear your thoughts about how I should go about this. Thanks
    """
  +type: "article"
  +lang: "en"
  +isOc: false
  +hasEmbed: false
  +commentCount: 6
  +favouriteCount: 3
  +score: 0
  +isAdult: false
  +sticky: false
  +lastActive: DateTime @1688440552 {#2410
    date: 2023-07-04 05:15:52.0 +02:00
  }
  +ip: null
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  +tags: null
  +mentions: null
  +comments: Doctrine\ORM\PersistentCollection {#1866 …}
  +votes: Doctrine\ORM\PersistentCollection {#1978 …}
  +reports: Doctrine\ORM\PersistentCollection {#1946 …}
  +favourites: Doctrine\ORM\PersistentCollection {#1971 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2443 …}
  +badges: Doctrine\ORM\PersistentCollection {#2426 …}
  +children: []
  -id: 749
  -titleTs: "'38khz':10 'constant':5 'current':6 'driver':8 'led':7 'switch':3"
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  +cross: false
  +upVotes: 0
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS DENIED 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
4 DENIED moderate 
App\Entity\Entry {#2388
  +user: Proxies\__CG__\App\Entity\User {#1943 …}
  +magazine: App\Entity\Magazine {#266
    +icon: Proxies\__CG__\App\Entity\Image {#247 …}
    +name: "askelectronics@discuss.tchncs.de"
    +title: "askelectronics"
    +description: """
      **For questions about component-level electronic circuits, tools and equipment.**\n
      \n
      Rules\n
      -----\n
      \n
      1: Be nice.\n
      \n
      2: Be on-topic (eg: *Electronic*, not *electrical*).\n
      \n
      3: No commercial stuff, buying, selling or valuations.\n
      \n
      4: Be safe.\n
      \n
      ---
      """
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    +postCount: 1
    +postCommentCount: 4
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    }
    +markedForDeletionAt: null
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    +moderators: Doctrine\ORM\PersistentCollection {#238 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#234 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#223 …}
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      date: 2023-06-19 05:13:29.0 +02:00
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  +image: null
  +domain: Proxies\__CG__\App\Entity\Domain {#1912 …}
  +slug: "Can-I-switch-this-constant-current-LED-driver-at-38kHz"
  +title: "Can I switch this constant current LED driver at 38kHz?"
  +url: null
  +body: """
    My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
    \n
    I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
    \n
    I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
    \n
    I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
    \n
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      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
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      \n
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      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
      \n
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      \n
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    +url: null
    +body: """
      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
      \n
      I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
      \n
      I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
      \n
      I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
      \n
      Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
      \n
      I’d love to hear your thoughts about how I should go about this. Thanks
      """
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    -titleTs: "'38khz':10 'constant':5 'current':6 'driver':8 'led':7 'switch':3"
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    I would just use a MOSFET and resistor to drive the LED if you are only using it in short bursts.\n
    \n
    If you want to drive the MOSFET directly from the microcontroller pin, it will need a series resistor to limit the current since the gate has quite a bit of capacitance. If your microcontroller pins can handle 15-20mA, it will be able to switch an AO3400A fast enough without needing a gate driver.
    """
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10 DENIED moderate 
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        \n
        Rules\n
        -----\n
        \n
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    +slug: "Can-I-switch-this-constant-current-LED-driver-at-38kHz"
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    +url: null
    +body: """
      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
      \n
      I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
      \n
      I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
      \n
      I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
      \n
      Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
      \n
      I’d love to hear your thoughts about how I should go about this. Thanks
      """
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    -titleTs: "'38khz':10 'constant':5 'current':6 'driver':8 'led':7 'switch':3"
    -bodyTs: "'/assets/datasheets/pam2804.pdf)':110 '/media/resource/hires/osram-dam-5723342/sfh%204727as_en.pdf))':15 '/sites/default/files/res/data_sheets/ao3400a.pdf)':84 '1a':53 '38khz':45 '4727as':12 '5v':52 '5w':67 'agre':100 'alreadi':28 'ao3400a':81 'aosmd.com':83 'aosmd.com/sites/default/files/res/data_sheets/ao3400a.pdf)':82 'carrier':42 'close':64 'constant':111 'control':17,20 'current':112 'd':152 'dammedia.osram.info':14 'dammedia.osram.info/media/resource/hires/osram-dam-5723342/sfh%204727as_en.pdf))':13 'decid':90 'devic':21 'dim':139 'drive':5,60 'driver':97,114 'en':129,132 'exampl':23 'first':73 'flicker':150 'frequenc':43 'go':162 'goal':2 'hear':155 'howev':48 'infrar':7 'ir':18 'led':8,62,96,113 'like':9,58,79 'limit':49,69 'look':104 'love':153 'm':103,117 'mean':143 'meant':135 'microcontrol':37 'mosfet':78 'output':29,145 'pam2804':107 'pin':34,130,133 'possibl':71 'power':54 'prevent':149 'psu':68 'pwm':138 'pwm-dim':137 'remot':19 'resistor':88 'sfh':11 'signal':31,39,126 'smooth':147 'suppli':55,124 'sure':119 'thank':165 'thought':74,157 'togeth':85 'tv':25 'use':76,94 'worth':93 'would':57 'www.diodes.com':109 'www.diodes.com/assets/datasheets/pam2804.pdf)':108"
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  +body: """
    I wouldn’t use the PAM2804. The datasheet recommends a PWM frequency of 500 Hz, and if you look at the “PWM Dimming: ILED vs. Duty Cycle” chart on page 5 you can see why - at 1 kHz there is already a significant reduction in the average LED current. The enable response just isn’t fast enough to modulate at 38 kHz - by the time you want to turn it off, it will barely be on.\n
    \n
    This isn’t quite enough for your 38 kHz either, but it’s closer (and waaaay more complicated): [MAX16834](https://www.analog.com/en/products/max16834.html#product-overview). The datasheet says it can do up to 20 kHz, but at a glance I did not see a particular spec that seems to actually limit that.\n
    \n
    [Here’s an article](https://e2e.ti.com/blogs_/b/powerhouse/posts/led-brightness-adjustment-high-frequency-pwm-dimming) about fast switching LEDs. All the linked products unfortunately have supply voltage ratings above yours, so they won’t work. But it discusses the concept of shunt dimming, where you’d end up simply bypassing the current around the LED rather than actually turning off the current regulator. Inefficient, yes.
    """
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        \n
        Rules\n
        -----\n
        \n
        1: Be nice.\n
        \n
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      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
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      I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
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      I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
      \n
      I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
      \n
      Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
      \n
      I’d love to hear your thoughts about how I should go about this. Thanks
      """
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    I wouldn’t use the PAM2804. The datasheet recommends a PWM frequency of 500 Hz, and if you look at the “PWM Dimming: ILED vs. Duty Cycle” chart on page 5 you can see why - at 1 kHz there is already a significant reduction in the average LED current. The enable response just isn’t fast enough to modulate at 38 kHz - by the time you want to turn it off, it will barely be on.\n
    \n
    This isn’t quite enough for your 38 kHz either, but it’s closer (and waaaay more complicated): [MAX16834](https://www.analog.com/en/products/max16834.html#product-overview). The datasheet says it can do up to 20 kHz, but at a glance I did not see a particular spec that seems to actually limit that.\n
    \n
    [Here’s an article](https://e2e.ti.com/blogs_/b/powerhouse/posts/led-brightness-adjustment-high-frequency-pwm-dimming) about fast switching LEDs. All the linked products unfortunately have supply voltage ratings above yours, so they won’t work. But it discusses the concept of shunt dimming, where you’d end up simply bypassing the current around the LED rather than actually turning off the current regulator. Inefficient, yes.
    """
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      My goal is to drive an infrared LED like ([this SFH 4727AS](https://dammedia.osram.info/media/resource/hires/osram-dam-5723342/SFH%204727AS_EN.pdf)) to control IR remote controlled devices (for example a TV).\n
      \n
      I can already output the signal on a pin of my microcontroller. The signal has a carrier frequency of 38kHz.\n
      \n
      I am however limited to a 5V 1A power supply and would like to drive the LED as close to the 5W psu limit as possible.\n
      \n
      I first thought about using a MOSFET like [this AO3400A](https://aosmd.com/sites/default/files/res/data_sheets/AO3400A.pdf) together with a resistor, but decided it was worth using an LED driver, do you agree?\n
      \n
      Now I’m looking at [this PAM2804](https://www.diodes.com/assets/Datasheets/PAM2804.pdf) constant current LED driver but I’m not sure if I can just supply my signal to the EN pin. The EN pin is meant for PWM-dimming, so does that mean the output is smoothed to prevent flickering?\n
      \n
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      """
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    I wouldn’t use the PAM2804. The datasheet recommends a PWM frequency of 500 Hz, and if you look at the “PWM Dimming: ILED vs. Duty Cycle” chart on page 5 you can see why - at 1 kHz there is already a significant reduction in the average LED current. The enable response just isn’t fast enough to modulate at 38 kHz - by the time you want to turn it off, it will barely be on.\n
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    This isn’t quite enough for your 38 kHz either, but it’s closer (and waaaay more complicated): [MAX16834](https://www.analog.com/en/products/max16834.html#product-overview). The datasheet says it can do up to 20 kHz, but at a glance I did not see a particular spec that seems to actually limit that.\n
    \n
    [Here’s an article](https://e2e.ti.com/blogs_/b/powerhouse/posts/led-brightness-adjustment-high-frequency-pwm-dimming) about fast switching LEDs. All the linked products unfortunately have supply voltage ratings above yours, so they won’t work. But it discusses the concept of shunt dimming, where you’d end up simply bypassing the current around the LED rather than actually turning off the current regulator. Inefficient, yes.
    """
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  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS DENIED 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
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