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R2A20124ASP Datasheet

(R2A20124AFP / R2A20124ASP) Synchronous Phase Shift Full-Bridge Control IC

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Preliminary Datasheet
R2A20124AFP/R2A20124ASP
REJ03D0928-0200
Synchronous Phase Shift Full-Bridge Control IC Series
Rev.2.00
Aug 03, 2010
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
2000 pcs./one taping product
2000 pcs./one taping product
REJ03D0928-0200 Rev.2.00
Aug 03, 2010
www.DataSheet.in
Page 1 of 12


Renesas Electronics Components Datasheet

R2A20124ASP Datasheet

(R2A20124AFP / R2A20124ASP) Synchronous Phase Shift Full-Bridge Control IC

No Preview Available !

R2A20124AFP/R2A20124ASP
Modified Points from R2A20121SP
The swing level of the maximum output voltage is changed from VREF to VCC.
Ramp sloping compensation circuit is added.
Synchronous rectification control is possible to turned off at light load. (only R2A20124AFP)
On/off control terminal for Remote is added. (only R2A20124AFP)
Illustrative Circuit
Preliminary
VIN
DC 12 V
DC 12 V
DC 12 V
DC 12 V
DC 12 V
Vbias
(DC 12 V)
VCC OUT OUT CS RAMP RAMP OUT OUT
-A -B
-SLP -C -D
SEC-CONT(1)
REMOTE(1) R2A20124AFP/ASP
VREF
OUT OUT
-E -F
COMP
FB(–)
CS- DELAY DELAY DELAY
PGND SGND RT SYNC SS OUT(1) -1 -2 -3
Note: 1. Only R2A20124AFP
REJ03D0928-0200 Rev.2.00
Aug 03, 2010
www.DataSheet.in
Page 2 of 12


Part Number R2A20124ASP
Description (R2A20124AFP / R2A20124ASP) Synchronous Phase Shift Full-Bridge Control IC
Maker Renesas Technology
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