Synchronous Phase Shift Full-Bridge Controller
Preliminary Datasheet
R2A20124AFP/R2A20124ASP
R03DS0031EJ0300
Synchronous Phase Shift Full-Bridge Control IC Series
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Description
Preliminary Datasheet
R2A20124AFP/R2A20124ASP
R03DS0031EJ0300
Synchronous Phase Shift Full-Bridge Control IC Series
Rev.3.00 Mar 11, 2011
Description
The R2A20124AFP/R2A20124ASP controls a full-bridge phase shift circuit and secondary synchronous rectification. The R2A20124AFP/R2A20124ASP has adjustable delay time functions which make ZVS of primary side and make loss of body diode of primary switching device minimal.
The R2A20124AFP/R2A20124ASP is based on HA16163/R2A20121. And RAMP slope compensation circuit is builtin as an additional function. Also its output driver circuits are improved to enlarge gate drive output voltage swing from VREF to VCC.
In addition R2A20124AFP has ON/OFF function of synchronous rectification and includes amplifier which detect input current signal.
Features
Maximum ratings Supply voltage Vcc: 20 V Operating junction temperature Tj-opr: –40 to +125°C
Electrical characteristics VFB feedback voltage VFB(–): 1.25 V 2.0% UVLO (Under Voltage Lockout) operation start voltage VH: 8.4 V 0.7 V UVLO operation shutdown voltage VL: 8.0 V 0.6 V UVLO hysteresis voltage dVUVL: 0.4 V 0.1 V Output voltage swing of OUT-A, B, C, D, and E for gate drive: GND to VCC
Functions R2A20124AFP/R2A20124ASP Full-bridge phase-shift switching circuit with adjustable delay times Pulse by pulse current limit Synchronization I/O for the oscillator Ramp sloping adjustor Error amplifier built-in Soft start function
R2A20124AFP Synchro...
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