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UC3825
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UC3825

  • 所属类别:ACDC-和-DCDC-电源
  • 产品名称:高速 PWM 控制器
  • 厂商:TI
  • 生产批号:09+
  • 封装:16PDIP, 16SOIC, 20PLCC
  • 库存状态:有库存
  • 库存量:4000
  • 最低订购量:1
  • 详细资料:点击查找UC3825的pdf资料
  • 点击询价
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  • Product Introduction

The PWM control IC UC1825 series is best suited for high frequencies for switching power supply applications. Special attention is given to minimize the propagation delay of the amplifier logic circuit by comparing and maximizing the bandwidth and slew rate of errors. The controller is designed for voltage mode systems that feed forward with either current mode or input voltage.

The protection circuitry includes a 1V threshold current-limited comparator compatible with the TTL shut-off port and soft-start pins, which will double the maximum duty cycle clamping. The logic is to completely lock the free operation of providing jitter and prohibit multiple pulses from being output. The 800mV hysteresis undervoltage lockout section ensures low start-up current.

characteristic
 
  • Suitable for voltage or current mode topologies
  • The actual operating switching frequency is 1MHz
  • 50ns propagation delay to output
  • High current dual totem (1.5A peak) pole output
  • Wideband error amplifier
  • Fully locked logic dual-pulse suppression
  • The pulse is limited by the pulse current
  • Soft start/max. Duty cycle control
  • Undervoltage lockout and hysteresis
  • Low starting current (1.1 milliampere)
parameter
      UC3825
topology     Boost, buck, reverse, forward, full-bridge, half-bridge, push-pull
Control method     Current mode, voltage mode
Duty Cycle (Max) (%)     50
Frequency (max) (kHz)     1000
On/off of undervoltage lockout threshold (5)     9.2/8.4
Pin/Pack     16PDIP,20PLCC,16SOIC
(#) Regulated output     2
Operating Temperature Range (°C)     0 to 70

The ICs associated with the UC3825 include:


Model Manufacturers lot number encapsulation illustrate
382575-2 TYCO 10+ N/A Brand new original import, Hong Kong spot
TPS3825-33DBVR TI 10+ N/A Brand new original import, Hong Kong spot
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M38257M8-053FP Mitsubishi 00+ QFP-80 Programmable DMA controller
UC3825BN UC 93+ DIP-16 Brand new original
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UC3825A TI 08+ 16PDIP, 16SOIC, 20PLCC High-speed PWM controller
UC3825 TI 09+ 16PDIP, 16SOIC, 20PLCC High-speed PWM controller
TPS3825-50-Q1 TI 07+ SOP Automotive processor monitoring circuit
TPS3825-50 TI 10+ SOT23-5 Processor monitoring circuit
TPS3825-33-Q1 TI 07+ SOP Automotive processor monitoring circuit
TPS3825-33 TI 10+ SOT-153 Processor monitoring circuit
UC3825DW TI 0710+ HTSSOP16  

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