BD9634GU Datasheet, PDF (19/30 Pages) Rohm – Switching Regulator ICs

BD9634GU
【Short Protection Function】
 CH3 to CH8 are monitoring error amp input voltage fed backed from output and enable timer circuit with falling
below the detection voltage of short protection circuit. Timer latch circuit will latch power MOS to OFF status of CH2
to CH9 if such condition remained for 1.0[ms]. If VOUT5 is shorted during CH5 Boost setting, Short Protection
Circuit will be disabled with falling below the detection voltage of input voltage.
 All channel except CH1 will be latched with any other channels to be over-current and/or shorted.
 Latch will be released either setting XSHDN1=GND, PWM/PFM=GND, XSHDN9=GND or restarting the device.
 Short detection comparator will be disabled by soft start.
 The timer latch circuit doesn't operate in PFM mode.
VOUT3
FB3
0.2[V]
FB4
VOUT4
0.2[V]
VOUT5
.
FB5
FB6
VOUT6
VOUT7
FB7
0.5[V]
0.4[V]
0.5[V]
Timer Latch Circuit
Latch with the following condition :CH2 to CH9
CH2：PMOS OFF
CH3：SW3=Hiz
CH4：DSW4=Hiz
　up side=PMOS ON
NMOS OFF
CH5：Boost OUT5=Low
　　 　 Buck OUT5=High
CH6：Load switch OFF
OUT6=Low
CH7：PMOS OFF BG=SW7 side
NMOS OFF
CH8：OUT8=High
CH9：PMOS OFF
VOUT8
FB8
VREF8
1.29[V]
【Thermal shutdown function】
Thermal shutdown function is built in to prevent IC from heat distraction.
Thermal circuit will be disabled by PFM.
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
19/26
TSZ02201-0313AA400620-1-2
26.Apr.2016 Rev.001