最高 1 MHz 双输出(推拉或 H 桥)电压或电流模式 PWM 控制器

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MC34025 系列为高速、固定频率、双端脉宽调制器控制器,适用于高频运行。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成本高效方案。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、高速电流传感比较器、转向触发器和双高电流图腾柱输出,适用于驱动功率 MOSFET。还包括了保护功能,包括输入和参考欠压锁定且全部带有迟滞、按周期电流限制和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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fsw Typ (kHz)

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UVLO (V)

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Reference Price

MC33025DWG

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-16W

3

260

TUBE

47

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

Yes

30

200 / 200

Price N/A

More Details

MC33025DWR2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-16W

3

260

REEL

1000

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

Yes

30

200 / 200

Price N/A

More Details

MC33025PG

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Obsolete

CAD Model

Pb

A

H

P

PDIP-16

NA

0

TUBE

25

N

Push-Pull

Current/Voltage Mode

1000

No

Yes

Yes

No

Yes

30

200 / 200

Price N/A

More Details

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