ISL8843A

Single-Ended Current Mode PWM Controller with 3% Current Limit and Military Temp Grade Option

OVERVIEW

The ISL884xA is a high performance drop-in replacement for the popular 28C4x and 18C4x PWM controllers suitable for a wide range of power conversion applications including boost, flyback, and isolated output configurations. Its fast signal propagation and output switching characteristics make this an ideal product for existing and new designs.

Features include 30V operation, low operating current, 90µA 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
  • 90µA start-up current, 125µA maximum
  • 35ns propagation delay current sense to output
  • Fast transient response with peak current mode control
  • 30V operation
  • 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
  • 1.5MHz bandwidth error amplifier
  • Tight tolerance voltage reference over line, load and temperature
  • ±3% current limit threshold
  • Pb-free plus anneal available and ELV, WEEE, RoHS Compliant

PARAMETRICS

Parameters
ISL8843A
Basic Information
Production Status
Mass Production
Topology
Single-Ended
Topology Characteristic
Flyback
Control Mode
Peak Current Mode
UVLO Rising (V)
8.4
UVLO Falling (V)
7.6
VBIAS (max) (V)
30
No-Load Operating Current
2.9 mA
# of PWM Outputs
1
FET Driver Output Current Max
1 A
Max Duty Cycle (%)
100
Qualification Level
Standard
Can Sample
YES
Temperature Range
-55 to +125

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