Offline Controllers | MC34023

高速单端 PWM 控制器

Obsolete

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概览

MC34023 系列是针对高频操作进行优化的高速、固定频率、单端脉宽调制器控制器。此类器件专门针对离线和 DC-DC 转换器应用而设计，为设计人员提供了外部部件极少的经济高效方案。此类集成电路具有振荡器、温度补偿参考、宽带宽误差放大器、高速电流检测比较器和高电流图腾柱输出，适用于驱动功率 MOSFET。同时还具有保护功能，包括输入和参考欠电压锁定，每个锁定都具有滞后、逐周期电流限制以及用于单脉冲计量的锁存。此系列的灵活性使其能够针对电流模式或电压模式控制轻松配置。

  • 50 ns Propagation Delay to Output
  • High Current Totem Pole Output
  • Wide Bandwidth Error Amplifier
  • Fully-Latched Logic with Double Pulse Suppression
  • Latching PWM for Cycle-By-Cycle Current Limiting
  • Soft-Start Control with Latched Overcurrent Reset
  • Input Undervoltage Lockout with Hysteresis
  • Low Start-Up Current (500 µA Typ)
  • Internally Trimmed Reference with Undervoltage Lockout
  • 90% Maximum Duty Cycle (Externally Adjustable)
  • Precision Trimmed Oscillator
  • Voltage or Current Mode Operation to 1.0 MHz
  • Functionally Similar to the UC3823
  • Pb-Free Packages are Available

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fsw Typ (kHz)

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UVLO (V)

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Latch

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MC34023PG

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Obsolete

CAD Model

Pb

A

H

P

PDIP-16

648-08

NA

0

TUBE

25

N

-

Voltage or Current

Adj.

No

Yes

Yes

No

-

30

200

Price N/A

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