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SG3526Pulse Width Modulation (PWM) Controllers

脉宽调制控制器

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SG3526Pulse Width Modulation (PWM) Controllers Product Details

General Description

The SG3526 is a high performance pulse width modulator integrated circuit intended for fixed frequency switching regulators and other power control applications.

Functions included in this IC are a temperature compensated voltage reference,sawtooth oscillator,error amplifier, pulse width modulator, pulse metering and steering logic,and two high current totem pole outputs ideally suited for driving the capacitance ofpower FETs at high speeds.

Additional protective features include soft start and undervoltage lockout,digital current limiting,double pulse inhibit,adjustable dead time and a data latch for single pulse metering;

All digital control ports are TTL and B-series CMOS compatible. Active low logic design allows easy wired-OR connections for maximum fiexibility.

The versatility of this device enablesimplementation or transformer coupled

FEATURES

8.0V to 35V Operation

5.0V ±1% Trimmed Reference

1.0Hz to 400KHz Oscillator Range Dual Source/Sink Current Outputs:±100mA

Digital Current Limiting

Programmable Dead Time

Undervolage-Lockout

Single Pulse Metering

Programmable Soft-Start

Wide Current Limit Common Mode