Description
STEVAL-ISA203V1 evaluation board is designed to demonstrate high efficiency DCDC conversion with 60 W output (12 V/5 A) from 42 to 56 VDC input (48 V nom.), which is especially suitable for telecom applications. The power conversion stage is based on a flyback topology managed by the PM8804 controller, which features all the integrated circuitry necessary for a compact and efficient 48 V converter. The highly configurable controller includes a programmable oscillator for switching frequency regulation up to 1 Mhz, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time. The secondary side employs the SRK1000 adaptive synchronous rectification controller for flyback converters. Product summary 48 V flyback converter 12 V – 5 A based on PM8804 STEVALISA203V1 PWM peak current mode controller for PoE and telecom systems PM8804 Adaptive synchronous rectification controller for flyback converter SRK1000 N-channel 80 V, 3.0 mΩ typ., 120 A STripFET F7 Power MOSFET in PowerFLAT 5x6

Features
■ DC-DC flyback converter based on: – PM8804 PWM peak current mode controller, and – SRK1000 adaptive synchronous rectification controller
■ Input voltage range 42 – 56 VDC
■ Switching frequency: 200 kHz
■ Output: – Power: 60 W – Voltage: 12 VDC – Current: 5 A
■ Peak efficiency > 92%
■ RoHS compliant