ISL6843

Improved Industry-Standard Single-Ended PWM Controller

Product Status: 量産中

OVERVIEW

The ISL6840, ISL6841, ISL6842, ISL6843, and ISL6844 (ISL684x) family of adjustable frequency, low power, Pulse-Width Modulating (PWM) current mode controllers is designed for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Peak current mode control effectively handles power transients and provides inherent overcurrent protection.

This advanced BiCMOS design is pin-compatible with the industry standard 384x family of controllers and offers significantly improved performance. Features include low operating current, 60µA start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times.

KEY FEATURES

  • 1A MOSFET gate driver
  • 60µA start-up current, 100µA maximum
  • 25ns propagation delay current sense to output
  • Fast transient response with peak current mode control
  • Adjustable switching frequency to 2MHz
  • 20ns rise and fall times with 1nF output load
  • Trimmed timing capacitor discharge current for accurate deadtime/maximum duty cycle control
  • High bandwidth error amplifier
  • Tight tolerance voltage reference over line, load, and temperature
  • Tight tolerance current limit threshold
  • Pb-free available (RoHS compliant)

PARAMETRICS

Parameters
ISL6843
Basic Information
Production Status
量産中
トポロジ
Single-Ended
トポロジ特性
Flyback or Forward (two switch)
制御モード
Peak Current Mode
UVLO立ち上がり (V)
8.4
UVLO立ち下がり (V)
7.2
VBIAS (V) (max)
20
無負荷動作電流
3.3 mA
PWM出力数
1
FETドライバ最大出力電流
1 A
最大デューティサイクル (%)
100
認定レベル
Standard
CANサンプル
YES
温度範囲
-40 to +85

ブロック図

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