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UC3856
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UC3856

  • 所属类别：ACDC-和-DCDC-电源
  • 产品名称：改进的电流模式 PWM 控制器
  • 厂商：TI
  • 生产批号：08+
  • 封装：16PDIP, 16SOIC, 20PLCC
  • 库存状态：有库存
  • 库存量：2000
  • 最低订购量：1
  • 详细资料：点击查找UC3856的pdf资料
  • 点击询价
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  • Product Introduction

The UC3856 is a high-performance version of the popular UC3846 current mode controller series and is important for designing new applications for upgrades and intends to improve speed and accuracy. All input/output delays have been minimized, and current-sense output slew rate limits are used to reduce noise sensitivity. A fast 1.5A peak output stage has been added to allow fast switching of power FETs.

The low-impedance TTL-compatible synchronous output is used as a synchronous input when the three-state function is implemented.

The grounding of the internal chip has been improved to reduce the large capacitive load caused by the internal x93noise x94 while driving. This is the result of an improved differential current-sense amplifier for enhanced noise immunity.

characteristic
 
  • Pin-to-pin compatible with the UC3846
  • A typical shutdown delay of 65 ns to the output and a typical delay of 50 ns to the output synchronization
  • Improved and reduced noise sensitivity current sense amplifier
  • The differential current detection common mode range is 3V
  • Precise dead zone control of the side vibration discharge current
  • Accurate 1V closing threshold
  • High-current dual totem pole output (1.5A peak)
  • TTL compatible threshold for oscillator synchronization pins
  • ESD protection at 4kV
parameter
      UC3856
topology     Boost, buck, reverse, forward, full-bridge, half-bridge, push-pull
Control method     Current mode
Duty Cycle (Max) (%)     50
Frequency (max) (kHz)     1000
On/off of undervoltage lockout threshold (5)     7.7 / 7
Pin/Pack     16PDIP，16SOIC，20PLCC
(#) Regulated output     2
Operating Temperature Range (°C)     0 to 70

The ICs related to UC3856 include:


Model Manufacturers lot number encapsulation illustrate
LP3856ES-ADJ/NOPB   10+11+   Hong Kong spot, imported original
LP3856ES-3.3/NOPB   10+11+   Hong Kong spot, imported original
53856-5070 MOLEX 10+ N/A Brand new original import, Hong Kong spot
LP3856ES-1.8 NSC 10+11+ TO - 220 3A fast ultra-low dropout linear regulation
LP3856ES-ADJ NSC 09+ TO263 3A fast ultra-low dropout linear regulator
LP3856ES-3.3 NSC 10+ TO-263-5 3A fast ultra-low dropout linear regulator
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LP3856ESX-ADJ NS 08+ TO-263-5 Brand new original
BH3856S-HC ROHM 03+ DIP Brand new original
UC3856 TI 08+ 16PDIP, 16SOIC, 20PLCC Improved current-mode PWM controller
UC3856DWG4 NEC 98+ QFP  

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