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AC/DC 控制器

UC1845A

不推薦在新設計中採用

電流模式 PWM 控制器

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產品規格表
UC1845A 不建議用於新設計
此產品將繼續向現有客戶提供。新設計應考量替代產品。
open-in-new 比較替代產品
功能相似於所比較的產品。
UCC2803-EP 現行 強化型產品低功耗 Bicmos 電流模式 Pwm Enhanced product upgrade to BiCMOS

UC1845A

不推薦在新設計中採用
立即訂購

產品詳細資料

Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Multi-topology Duty cycle (max) (%) 50
CDIP (JG) 8 64.032 mm² (— mm × — mm) LCCC (FK) 20 79.0321 mm² (— mm × — mm)
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 UCx84xA Current-Mode PWM Controller datasheet (Rev. H) PDF | HTML 2024/10/11
* SMD UC1845A SMD 5962-86704 2016/6/21

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