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ISL78225

Renesas
Part Number ISL78225
Manufacturer Renesas
Description 4-Phase Interleaved Boost PWM Controller
Published Feb 25, 2019
Detailed Description DATASHEET ISL78225 4-Phase Interleaved Boost PWM Controller with Light Load Efficiency Enhancement FN7909 Rev 4.00 Sep...
Datasheet PDF File ISL78225 PDF File

ISL78225
ISL78225

Overview
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 implementation area.
The ISL78225 has a dedicated pin to initiate the phase dropping scheme for higher efficiency at light load by dropping phases based on the load current, so the switching and core losses in the converter are reduced significantly.
As the load increases, the dropped phase(s) are added back to accommodate heavy load transients and improve efficiency.
Input current is sensed continuously by measuring the voltage across a dedicated current sense resistor or inductor DCR.
This curren...


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