ISL78225 Datasheet - Renesas

ISL78225 4-Phase Interleaved Boost PWM Controller

PIN # 1 2 3 4 5 6 7 8 9 10 11 SYMBOL FS SS COMP FB VREF2 GND SLOPE PLL_COMP SYNC CLK_OUT PWM_INV DESCRIPTION A resistor placed from FS to ground will set the PWM switching frequency. Use this pin to set up the desired soft-start time. A capacitor placed from SS to ground will set up the soft-sta.

DATASHEET ISL78225 4-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement FN7909 Rev 4.00 September 5, 2014 The ISL78225 4-phase controller is targeted for applications where high efficiency (>95%) and high power are required. The multiphase boost converter architecture uses interleaved timing to multiply channel ripple frequency and reduce input and output ripple. Lower ripple results in fewer input/output capacitors and therefore lower component cost and smaller imp.

ISL78225 Features

* Peak current mode PWM control with adjustable slope compensation

* Precision resistor/DCR current sensing

* 2-, 3- or 4-phase operation

* Adjustable phase dropping/diode emulation/pulse skipping for high efficiency at light load

* Phase dropping facilitated

ISL78225 Datasheet (1.22 MB)