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UC2845A
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UC2845A

  • 所属类别：ACDC-和-DCDC-电源
  • 产品名称：电流模式 PWM 控制器
  • 厂商：TI
  • 生产批号：10+
  • 封装：14SOIC, 16SOIC, 8PDIP, 8SOIC
  • 库存状态：有库存
  • 库存量：10000
  • 最低订购量：1
  • 详细资料：点击查找UC2845A的pdf资料
  • 点击询价
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  • Product Introduction

The control IC UC1842A/3A/4A/5A family is a pin-compatible series of improved versions of the UC3842/3/4/5 pins. Providing the necessary functions to control the current mode switching power supply, this home has the following improved features. The starting current is guaranteed to be less than 0.5 mA. The oscillator discharge is trimmed to 8.3 milliamps. In undervoltage lockout, the output stage can absorb at least 10 milliamps less than the 1.2V 5V V CC.

characteristic
 
  • Optimize offline and DC-to-DC converters
  • 低启动电流“（
  • Side vibration discharge current
  • Automatic feedforward compensation
  • The pulse is limited by the pulse current
  • Enhanced load response characteristics
  • Undervoltage locking hysteresis
  • Dual pulse suppression
  • The totem pole outputs a large current
  • Internal fine-tuning bandgap datum
  • 500kHz operation
  • Low voltage reverse osmosis error amplifier
parameter
    UC2845A  
topology   Boost, reverse, forward  
Control method   Current mode  
Duty Cycle (Max) (%)   50  
Frequency (max) (kHz)   450  
On/off of undervoltage lockout threshold (5)   8.4/7.6  
Pin/Pack   14SOIC，16SOIC，8PDIP，8SOIC  
(#) Regulated output   One  
Operating Temperature Range (°C)   -40 to 85  

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