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R1234D191B Datasheet(PDF) 2 Page - RICOH electronics devices division |
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R1234D191B Datasheet(HTML) 2 Page - RICOH electronics devices division |
2 / 26 page R1234D 2 BLOCK DIAGRAM R1234Dxx1A/B VIN Lx VOUT OSC Vref CE Chip Enable Soft Start Current Protection OUTPUT CONTROL UVLO Phase Comp. “H” Active MODE PGND VDD “L” PWM CE 1 8 2 7 4 5 6 3 “H” VFM PWM/VFM CONTROL AGND R1234Dxx1C/D VIN Lx VFB OSC Vref CE Chip Enable Soft Start Current Limit OUTPUT CONTROL UVLO Phase Comp. “H” Active MODE PGND VDD “L” PWM 1 8 2 7 4 5 6 3 “H” VFM PWM/VFM CONTROL AGND |
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