PWM 控制器,高性能,有源箝位/重置

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概览

NCP1562x 是一个电压模式控制器系列,用于需要高能效和较少零部件的 DC-DC 转换器。这些控制器将两个同相输出与重叠延迟相结合,以防止同时导通,实现了软切换。主输出用于驱动前向转换器主 MOSFET。辅助输出用于驱动有源箝位电路 MOSFET、辅助侧的同步整流器或不对称半桥电路。NCP1562 系列在最大占空比限制、欠电压检测器和过电流阈值等重要规格方面集成了很高的准确性,减少了部件数量,降低了系统尺寸。NCP1562 的两个不同功能为软截止和带有时间阈值的周期跳过电流限制。如果检测到严重故障,软截止电路则会以受控方式逐渐关闭转换器电源。周期跳过检测器实现了出现连续过电流情况下的软截止序列。NCP1562 的其他功能包括线路前馈、高达 1.0 MHz 的频率同步、带前缘间隔 (LEB) 的按周期电流限制、独立的欠电压和过电压检测器、可调节输出重叠延迟、可编程最大占空比、内部启动电路和软启动。

  • High power isolated DC/DC converters
  • Power supplies
  • Desktop / Server PSU
  • Telecom base station PSU
  • Flat TV PSU
  • Dual Outputs with Adjustable Overlap Delay
  • >2 A Output Drive Capability
  • Soft-Stop Powers Down Converter in a Controlled Manner
  • Cycle-by-Cycle Current Limit
  • Cycle Skip Initiated if Continuous Current Limit Condition Exists
  • Voltage Mode Operation with Input Voltage Feedforward
  • Fixed Frequency Operation up to 1 MHz
  • Bidirectional Frequency Synchronization
  • Independent Line Undervoltage and Overvoltage Detectors
  • Accurate Programmable Maximum Duty Cycle
  • Programmable Maximum Volt-Second Product
  • Programmable Soft-Start
  • Internal 100 V Startup Circuit
  • Precision 5 V Reference

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NCP1562ADBR2G

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Active

CAD Model

Pb

A

H

P

TSSOP-16

1

260

REEL

2500

N

Forward

1

Voltage Mode

8

100

1000

$1.2206

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NCP1562ADR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

1

260

REEL

2500

N

Forward

1

Voltage Mode

8

100

1000

$1.1616

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NCP1562BDBR2G

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Obsolete

CAD Model

Pb

A

H

P

TSSOP-16

1

260

REEL

2500

N

Forward

1

Voltage Mode

8

100

1000

Price N/A

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NCP1562BDR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

1

260

REEL

2500

N

Forward

1

Voltage Mode

8

100

1000

$1.056

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