ISL8845A

Pinout






Description

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, 90A start-up current, adjustable operating frequency to 2MHz, and high peak current drive capability with 20ns rise and fall times.

The ISL8845A 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. The features of ISL8845A are as follows: (1)1A MOSFET gate driver; (2)90A start-up current, 125A maximum; (3)35ns propagation delay current sense to output; (4)Fast transient response with peak current mode control; (5)30V operation; (6)Adjustable switching frequency to 2MHz.

The following is about the absolute maximum ratings of ISL8845A: (1)Supply Voltage, VDD: GND -0.3V to +30V; (2)OUT: GND -0.3V to VDD + 0.3V; (3)Signal Pins: GND -0.3V to 6.0V; (4)Peak GATE Current: 1A; (5)ESD Classification: Human Body Model (Per JESD22-A114C.01) 2000V, Machine Model (Per EIA/JESD22-A115-A) 200V, Charged Device Model (Per JESD22-C191-A) 1000V.

The electrical characteristics of the ISL8845A are: (1)Input Signal, Maximum: 0.97 V min, 1.00 V typ and 1.03 V max; (2)Gain, ACS = VCOMP/VCS: 2.5V/V min, 3.0V/V typ and 3.5V/V max at 0 < VCS < 910mV, VFB = 0V; (3)CS to OUT Delay:35 ns typ and 55 ns max; (4)Open Loop Voltage Gain: 60 dB min and 90 dB max; (5)Unity Gain Bandwidth: 1.0 MHz min and 1.5 MHz typ; (6)Reference Voltage: 2.475V min, 2.500V typ and 2.530V max at VFB = VCOMP; (7)FB Input Bias Current: -1.0 A min, -0.2 A typ and 1.0 A max at VFB = 0V.