Offline Controllers | MC34025

高速双端 PWM 控制器

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概览

MC34025 系列是针对高频操作进行优化的高速、固定频率、双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，为设计人员提供了一种经济高效的方案，并最大限度减少了外部部件。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、转向触发器和双高电流图腾柱输出，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 Outputs
  • Dual High Current Totem Pole Outputs
  • 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 mA Typ)
  • Internally Trimmed Reference with Undervoltage Lockout
  • 45% Maximum Duty Cycle (Externally Adjustable)
  • Precision Trimmed Oscillator
  • Voltage or Current Mode Operation to 1.0 MHz
  • Functionally Similar to the UC3825 Simplified
  • Pb-Free Packages are Available

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CAD Models

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Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

Latch

Soft Start

VCC Max (V)

Drive Cap. (mA)

Reference Price

MC34025DWG

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Obsolete

CAD Model

Pb

A

H

P

SOIC-16W

751G-03

3

260

TUBE

47

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

-

30

200 / 200

Price N/A

More Details

MC34025DWR2G

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Obsolete

CAD Model

Pb

A

H

P

SOIC-16W

751G-03

3

260

REEL

1000

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

-

30

200 / 200

Price N/A

More Details

MC34025PG

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Obsolete

CAD Model

Pb

A

H

P

PDIP-16

648-08

NA

0

TUBE

25

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

-

30

200 / 200

Price N/A

More Details

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