R2A20124AFP_11 Datasheet, PDF (1/13 Pages) Renesas Technology Corp – Synchronous Phase Shift Full-Bridge Control IC Series

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 built-
in 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
 Synchronous rectification on/off control
 Remote on/off control
 Amplified output of current sense input voltage: CS
 Package lineup
 Pb-free LQFP-40: R2A20124AFP
 Pb-free SOP-20: R2A20124ASP
Ordering Information
Part No.
R2A20124AFP-W0
R2A20124AFP-W5
R2A20124AFP-U0
R2A20124AFP-U5
R2A20124ASP-W0
R2A20124ASP-W5
R2A20124ASP-U0
R2A20124ASP-U5
Package Name
FP-40EV
FP-20DAV
Package Code
PLQP0040JB-C
PRSP0020DD-B
Taping Spec.
2000 pcs./one taping product
2000 pcs./one taping product
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2000 pcs./one taping product
2000 pcs./one taping product
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R03DS0031EJ0300 Rev.3.00
Mar 11, 2011
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