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UC3851
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UC3851

  • 所属类别：ACDC-和-DCDC-电源
  • 产品名称：可编程脱机 PWM 控制器
  • 厂商：TI
  • 生产批号：08+
  • 封装：18PDIP, 18SOIC
  • 库存状态：有库存
  • 库存量：2470
  • 最低订购量：1
  • 详细资料：点击查找UC3851的pdf资料
  • 点击询价
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  • Product Introduction

The PWM controller UC1851 family is best suited for offline primary side control. These devices include a high-current totem pole output stage and a toggle flip with an absolute 50% duty cycle limit failure. In all other respects, this pair of control wires is pin compatible with the UC1841 series. All major household chores share these high-performance controller functions, making them ideal for cost-sensitive applications.

Important features for these managers include low current start-up, linear feedback constant voltage second operation, and compatibility with voltage or current mode control advanced. Additionally, the devices include a programmable start-up threshold, as well as programmable over-voltage, under-voltage, and over-current fault thresholds.

characteristic
 
  • All control, drive, monitoring and protection functions include:
  • The low-current start-up circuit is offline
  • Feedforward voltage or current mode control
  • The totem pole outputs a large current
  • 50% absolute maximum duty cycle
  • PWM latches are single pulses per cycle
  • The pulse passes through the pulse current limit and shutdown the overcurrent fault
  • There are no start-up or shutdown transients
  • Slow start, shut down after these two initial and failures
  • Too high or too low voltage sensing after shutdown
  • Continuous locking or failure and then retrying
  • 1% benchmark accuracy
  • 500kHz operation
  • 18-pin or 20-pin DIL PLCC package
parameter
    UC3851
topology   Boost, buck, reverse, forward
Control method   Current mode, voltage mode
Duty Cycle (Max) (%)   50
Frequency (max) (kHz)   450
On/off of undervoltage lockout threshold (5)   8/7.8
Pin/Pack   18PDIP，18SOIC
(#) Regulated output   One
Operating Temperature Range (°C)   0 to 70

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LP38513T-1.8 NSC 10+ TO-220 3A fast-response ultra-low dropout linear regulator
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LP38512TSX-1.8 NSC 11+ TO-263 1.5A fast transient response, low-drop linear regulator
LP38512TS-1.8 NSC 10+ TO-263 Up to 42V input step-down DC/DC regulator at 300 mA
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LP38512TJ-ADJ NSC 10+ TO-263 THIN 1.5A fast transient response adjustable low dropout linear regulator
LP38512MRX-ADJ NSC 10+ PSOP 1.5A fast transient response adjustable low dropout linear regulator
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TI brand product recommendation


Model Manufacturers lot number encapsulation illustrate
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