DRV8808 Datasheet, PDF (23/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

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DRV8808
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
VM
VthVM+
(CSELECT = 200k to GND)
(VM = 6 V)
VthVM–
(VM = 5 V)
Capture CSELECT
Then Start Charge Pump
VCP
CP Start to DC-DC Delay
DCDC_B
(3.3 V to LDO_IN)
10 ms
(Note A)
LDO
(1.2 V)
120 ms
(20 ms + 100 ms)
nORT
L
H
Protection Mask
(OVP, UVP for Ch-A/B/C and LDO)
A. Charge-pump wakeup delay, from 10 ms to 20 ms due to asynchronous event capture.
B. LDO Enable follows DC/DC B Enable during power up and can be controlled using the SETUP register after power
up.
Figure 11. Power-up Timing (Power up With LDO, Supplied by DCDC_B)
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