ホーム パワー・マネージメント AC/DC と DC/DC の各コントローラ (外部 FET)

LM5041A

アクティブ

降圧段ディスエーブル・オプション搭載、カスケード型 PWM コントローラ

製品詳細

Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Current Topology Push pull Rating Catalog Features Current limiting, Programmable soft start, Synchronization pin Duty cycle (max) (%) 50
Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Current Topology Push pull Rating Catalog Features Current limiting, Programmable soft start, Synchronization pin Duty cycle (max) (%) 50
TSSOP (PW) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Internal Start-up Bias Regulator
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Current Mode Control
  • Internal Error Amplifier with Reference
  • Cycle-by-cycle Over-Current Protection
  • Leading Edge Blanking
  • Programmable Push-Pull Overlap or Dead Time
  • Internal 1.5A Push-Pull Gate Drivers
  • Programmable Soft-Start
  • Programmable Oscillator with Sync Capability
  • Precision Reference
  • Thermal Shutdown

All trademarks are the property of their respective owners.

  • Internal Start-up Bias Regulator
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Current Mode Control
  • Internal Error Amplifier with Reference
  • Cycle-by-cycle Over-Current Protection
  • Leading Edge Blanking
  • Programmable Push-Pull Overlap or Dead Time
  • Internal 1.5A Push-Pull Gate Drivers
  • Programmable Soft-Start
  • Programmable Oscillator with Sync Capability
  • Precision Reference
  • Thermal Shutdown

All trademarks are the property of their respective owners.

The LM5041A PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These “Cascaded” topologies are well suited for multiple output and higher power applications. The LM5041A’s four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either an overlap time (for current-fed applications) or a both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041A includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown.

The two differences between the LM5041 and the LM5041A are: No second level current limit in the 'A' version No softstart (SS) shutdown comparator in the 'A' version.

The LM5041A PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These “Cascaded” topologies are well suited for multiple output and higher power applications. The LM5041A’s four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either an overlap time (for current-fed applications) or a both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041A includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown.

The two differences between the LM5041 and the LM5041A are: No second level current limit in the 'A' version No softstart (SS) shutdown comparator in the 'A' version.

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種類 タイトル 最新の英語版をダウンロード 日付
* データシート LM5041A Cascaded PWM Controller データシート (Rev. B) 2013年 3月 21日
アプリケーション・ノート DC - DC Converter Featuring the Cascaded Power Converter Topology 2007年 3月 21日
ホワイト・ペーパー Communications System Power Supply Designs 2004年 1月 1日

設計および開発

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パッケージ ピン数 CAD シンボル、フットプリント、および 3D モデル
TSSOP (PW) 16 Ultra Librarian
WSON (NHQ) 16 Ultra Librarian

購入と品質

記載されている情報:
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL 定格 / ピーク リフロー
  • MTBF/FIT 推定値
  • 使用原材料
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果
記載されている情報:
  • ファブの拠点
  • 組み立てを実施した拠点

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