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BD9018KV Datasheet(PDF) 4 Page - Rohm |
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BD9018KV Datasheet(HTML) 4 Page - Rohm |
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4 / 17 page  Technical Note 4/16 BD9018KV www.rohm.com 2010.02 - Rev.A ○ c 2010 ROHM Co., Ltd. All rights reserved. ● Block diagram Fig. 11 ● Pin configuration ●PIN function table Fig. 12 Pin No. Pin name Function 1 OUTH2 High side FET gate drive pin 2 2 BOOT2 OUTH2 driver power pin 3 CL2 Over current detection pin 2 4 N.C Non-connect (unused) pin 5 VCCCL2 Over current detection VCC2 6 N.C Non-connect (unused) pin 7 VCC Input power pin 8 VCCCL1 Over current detection CC1 9 N.C Non-connect (unused) pin 10 CL1 Over current detection setting pin 1 11 BOOT1 OUTH1 driver power pin 12 OUTH1 High side FET gate drive pin 1 13 SW1 High side FET source pin 1 14 DGND1 Low side FET source pin 1 15 OUTL1 Low side FET gate drive pin 1 16 N.C Non-connect (unused) pin 17 VREG5A FET drive REG input 18 N.C Non-connect (unused) pin 19 N.C Non-connect (unused) pin 20 N.C Non-connect (unused) pin 21 FB1 Error amp input 1 22 COMP1 Error amp output 1 23 SS1 Soft start setting pin 1 24 N.C Non-connect (unused) pin 25 N.C Non-connect (unused) pin 26 EN1 Output 1 ON/OFF pin 27 EN2 Output 2 ON/OFF pin 28 N.C Non-connect (unused) pin 29 N.C Non-connect (unused) pin 30 GNDS Ground 31 N.C Non-connect (unused) pin 32 N.C Non-connect (unused) pin 33 RT Switching frequency setting pin 34 SYNC External synchronous pulse input pin 35 N.C Non-connect (unused) pin 36 PGOOD Power good terminal 37 SS2 Soft start setting pin 2 38 COMP2 Error amp output 2 39 FB2 Error amp input 2 40 N.C Non-connect (unused) pin 41 EXTVCC External power input pin 42 N.C Non-connect (unused) pin 43 N.C Non-connect (unused) pin 44 VREG5 FET drive REG output 45 N.C Non-connect (unused) pin 46 OUTL2 Low side FET gate drive pin 2 47 DGND2 Low side FET source pin 2 48 SW2 High side FET source pin 2 TSD Reg TSD UVLO PWM COMP Err Amp UVLO Set Q Reset DRV Set Reset OCP UVLO TSD B.G Slope PWM COMP TSD UVLO DRV Set Reset Set Q Reset ｔ Err Amp OCP Slope － ＋ ＋ SW LOGIC SW LOGIC SYNC OSC VREG5 EN VCC RT SYNC EXTVCC CL1 BOOT1 OUTH1 VREG5A OUTL1 DGND1 FB1 SS1 COMP1 VCCCL1 SW1 EN2 EN1 VREG5 VCCCL2 CL2 BOOT2 OUTH2 SW2 OUTL2 DGND2 FB2 SS2 COMP2 41 7 33 34 8 10 11 12 13 17 15 14 21 23 22 26 27 38 37 39 47 46 48 1 2 3 5 44 OCP PROTECT LOGIC 36 PGOOD PROTECT LOGIC OCP det 40 41 42 43 44 45 46 47 48 36 35 34 33 32 31 30 29 28 1 2 3 4 5 6 7 8 9 10 11 12 21 20 19 18 17 16 15 14 13 24 23 22 FB1 N.C N.C N.C VREG5A N.C OUTL1 DGND1 SW1 N.C SS1 COMP1 27 26 25 37 38 39 N.C EXTVCC N.C N.C VREG5 N.C OUTL2 DGND2 SW2 SS2 COMP2 FB2 |
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