V
BAT
< V
LOWV
Start Precharge
Icharge set by I
2
C
Connect VIN
Precharge safety
timer expired?
Stop Charging and set
Fault bits
/CE toggled or VIN and
removed and
reconnected?
V
BAT
> V
LOWV
Start FastCharge
Icharge set by I
2
C
I
BAT
< I
TERM
Fast Charge safety
timer expired?
Charge Done (Set bit
and interrupt and
disconnect BATFET)
V
BAT
< V
BAT
- V
RCH
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Figure 9-1. BQ25157 Charger Flow Diagram
When a valid input source is connected (V
IN
> V
UVLO
and V
BAT
+V
SLP
< V
IN
< V
OVP
), the state of the CE pin
determines whether a charge cycle is initiated. When the CE input is high and a valid input source is connected,
the battery charge FET is turned off, preventing any kind of charging of the battery. A charge cycle is initiated
when the CHARGE_DISABLE bit is written to 0 and CE pin in low.
shows the CE pin and bit priority to
enable/disable charging.
SLUSEC5 – DECEMBER 2020
Copyright © 2020 Texas Instruments Incorporated
17
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Summary of Contents for BQ25157
Page 107: ...D Max E Max 2 045 mm Min 1 645 mm Min 1 985 mm 1 585 mm...
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