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BD81A24MUV-M Datasheet(PDF) 2 Page - Rohm |
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BD81A24MUV-M Datasheet(HTML) 2 Page - Rohm |
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2 / 40 page  Datasheet Datasheet 2/36 BD81A24MUV-M/EFV-M TSZ02201-0T3T0C600070-1-2 © 2016 ROHM Co., Ltd. All rights reserved. 2016.10.19 Rev.003 www.rohm.com TSZ22111・15・001 Pin Description Pin Configuration VQFN28SV5050 (Top view) HTSSOP-B28 (Top view) Block Diagram OSC Control Logic Current driver ＋ － Open Short Detect － VREG VREG VCC EN UVLO TSD PWM Timer Latch VDISC OVP10 OVP OCP OVP CS FAIL1 RT SYNC SLOPE PWM BOOT OUTH SW DRV CTL OUTL DGND VREG ERRAMP － － － － ＋ LED1 LED2 LED3 LED4 COMP SS OCP OVP SS PGND ISET PWM Open Det Short Det Timer Latch FAIL2 ISET GND SHDETEN LEDEN1 LEDEN2 VQFN28 SV5050 HTSSOP -B28 Terminal Name Function 1 11 LEDEN1 LED output pin enable terminal 1 2 12 LEDEN2 LED output pin enable terminal 2 3 13 LED1 LED output terminal 1 4 14 LED2 LED output terminal 2 5 15 LED3 LED output terminal 3 6 16 LED4 LED output terminal 4 7 17 OVP Over-voltage detection terminal 8 18 ISET LED output current setting terminal 9 19 PGND LED output GND terminal 10 20 OUTL Low side FET drain terminal 11 21 DGND DC/DC output GND terminal 12 22 VDISC Output voltage discharge terminal 13 23 SW High side FET source terminal 14 24 OUTH High side FET gate terminal 15 25 BOOT High side FET driver power supply terminal 16 26 VREG Internal constant voltage 17 27 EN Enable terminal 18 28 CS DC/DC current sense terminal 19 1 VCC Input power supply terminal 20 2 SS “Soft Start” Capacitor connection 21 3 COMP ERR AMP output 22 4 RT Oscillation Frequency-setting resistor input 23 5 SYNC External synchronization input terminal 24 6 SHDETEN Short detection enable signal 25 7 GND Small signal GND terminal 26 8 PWM PWM light modulation input terminal 27 9 FAIL1 “Failure” signal output terminal 28 10 FAIL2 LED open/short detection output signal - - Thermal PAD Back side thermal PAD (Please connect to GND) Figure 2. Pin Configuration Figure 3. Internal Block Diagram |
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