ISL6744

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

Product Status: 量産中(*)

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)

PARAMETRICS

Parameters
ISL6744
Basic Information
Production Status
量産中(*)
iSimモデル
YES
トポロジ
Double-Ended
トポロジ特性
Half-Bridge or Full Bridge (Telecom) Hard SW
制御モード
Voltage Mode
UVLO立ち上がり (V)
6.3
UVLO立ち下がり (V)
5.7
VBIAS (V) (max)
20
無負荷動作電流
3 mA
PWM出力数
2
最大デューティサイクル (%)
100
認定レベル
Standard
温度範囲
-40 to +105

ブロック図

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