BD9639MWV_16 Datasheet, PDF (15/26 Pages) Rohm – Switching Regulator ICs

BD9639MWV
(11) Ground Short Protection Function
(a) CH2 to CH6 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 CH6 if such condition remained for 1.0[ms].
(b) All channel except CH1 will be latched with any other channels to be over-current and/or shorted.
(c) Latch will be released either setting XSHDN1=GND, XSHDN24=GND or restarting the device.
(d) Short detection comparator will be disabled by soft start.
(e) The timer latch circuit doesn't operate when an internal power supply is OFF.
OUT2
FB2
0.2[V]
Latch with follow conditions CH2 toCH6.
CH2：SW2=Hiz
CH3：DSW3=Hiz
USW 3=Hiz
OUT3
CH4：DSW4=Hiz
USW 4=Hiz
.
FB3
CH5：SW5=Hiz
CH6：Load Switch OFF
0.2[V]
NMOS =OFF
FB4
OUT4
OUT5
FB5
0.2[V]
0.2[V]
Timer latch circuit
FB6
OUT6
0.4[V]
(12) Thermal shutdown function
Thermal shutdown function is built in to prevent IC from heat distraction.
Thermal circuit will be disabled by PFM.
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TSZ22111・15・001
15/22
TSZ02201-0313AA400630-1-2
09.Feb.2016 Rev.001