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R2A20124AFP-U5 Datasheet(PDF) 5 Page - Renesas Technology Corp |
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R2A20124AFP-U5 Datasheet(HTML) 5 Page - Renesas Technology Corp |
5 / 13 page R2A20124AFP/R2A20124ASP Preliminary REJ03D0928-0200 Rev.2.00 Page 5 of 12 Aug 03, 2010 Block Diagram R2A20124AFP UVLO H L VCC 4 V H L OSCILLATOR RES Q SGND COMPARATOR VCC VREF VREF VREF CLAMP CIRCUIT VCC VCC VCC VCC VCC PGND 1.135 V VREF GOOD VREF GOOD VREF GOOD 1.25 V VREF heavy load VREF 40 μA 500 μA 10 μA 10 μA 2.5 k Ω 185 k Ω 1.15 V 1.4 V Zero Delay RES RES VREF OUT-A DELAY-1 OUT-B OUT-C DELAY-2 OUT-D DELAY-3 OUT-E OUT-F RT REMOTE SYNC COMP RAMP RAMP-SLP SS CS-OUT CS SEC-CONT ON: 1.32 V OFF: 1.23 V START-UP COUNTER 32 CLOCK 5 V GENERATOR FB(–) SYNC I/O ERROR AMP ×3.0 PULSE BY PULSE VREF GOOD CIRCUIT BIAS Phase Shift Control Logic DELAY Control Circuit DELAY Control Circuit Synchronous Rectification Control Logic |
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