R2A20121SP Ver la hoja de datos (PDF) - Renesas Electronics
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R2A20121SP Datasheet PDF : 28 Pages
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R2A20121SP
Synchronous Phase Shift Full-Bridge Control IC
Features
• High frequency operation; oscillator frequency = 2 MHz Max
• Full-bridge phase-shift switching circuit with adjustable delay times
• Integrated secondary synchronous rectification control with adjustable delay times
• Pulse by pulse current limit
• Package: TSSOP-20
Illustrative Circuit
VIN
DC 5 V DC 5 V
Vbias
(DC 12 V)
DC 5 V
DC 5 V
DC 5 V
REJ03D0914-0100
Rev.1.00
Sep 29, 2008
Vout
+
−
VCC OUT OUT CS RAMP
-A -B
OUT
-C
OUT OUT OUT
-D -E -F
VREF
R2A20121
COMP
FB (−)
DELAY DELAY DELAY
GND RT SYNC SS FB (+) -1
-2
-3
HAT3043C
HAT3042C
HAT3004R
Note: The above circuit is reference example. Please confirm the operation when designing the system.
REJ03D0914-0100 Rev.1.00 Sep 29, 2008
Page 1 of 27
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