ISL6744

Intermediate Bus Double-Ended PWM Controller with Precision Dead-Time Adjustment

Product Status: Mass Production(*)

OVERVIEW

The ISL6744 is a low cost, primary side, double-ended controller intended for applications using full and half-bridge topologies for unregulated DC/DC converters. It is a voltage mode PWM controller designed for half-bridge and fullbridge power supplies. It provides precise control of switching frequency, adjustable soft-start, precise deadtime control with deadtimes as low as 35ns, and overcurrent shutdown.

Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults.

KEY FEATURES

  • Precision Duty Cycle and Deadtime Control
  • 100µA Start-up Current
  • Adjustable Delayed Overcurrent Shutdown and Re-Start
  • Adjustable Oscillator Frequency Up to 2MHz
  • 1A MOSFET Gate Drivers
  • Adjustable Soft-Start
  • Internal Over Temperature Protection
  • 35ns Control to Output Propagation Delay
  • Small Size and Minimal External Component Count
  • Input Undervoltage Protection
  • Pb-Free Plus Anneal Available (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL6744
Basic Information
生产状态
Mass Production(*)
iSim模型
YES
拓扑
Double-Ended
拓扑特征
Half-Bridge or Full Bridge (Telecom) Hard SW
控制模式
Voltage Mode
UVLO上升 (V)
6.3
UVLO下降 (V)
5.7
VBIAS (最大值) (V)
20
无负载工作电流
3 mA
PWM输出数量
2
最大占空比 (%)
100
资质级别
Standard
温度范围
-40 to +105

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