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| BQ24157S Datasheet, PDF (14/45 Pages) Texas Instruments – Full USB Compliance and USB-OTG Support | |||
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Not Recommended for New Designs
bq24157S
SLUSB76B â FEBRUARY 2013 â REVISED MAY 2015
Functional Block Diagrams (continued)
www.ti.com
Power Up
V BUS > V UVLO
V CSOUT < V LOWV
No
POR
Load I2 C Registers
Yes
with Default Value
/CE = LOW
Disable Charge
Charge Configure
Mode
/CE = HIGH
High Impedance Mode or Host
Controlled Operation Mode
Any Charge State
Wait Mode
Delay TINT
V CSOPUT < V SHORT ?
No
Disable Charge
Indicate Power
not Good
Yes
No
Enable I SHORT
Indicate Short
Circuit condition
Yes
V BUS < V IN ( MIN ) ?
No
Regulate
Input Current , Charge
Current or Voltage
Indicate Charge- In -
Progress
Yes
VBUS < V IN ( MIN ) ?
Yes
No
No
VCSOUT < V SHORT ?
No
Termination Enabled
ITERM detected
and VCSOUT > V OREG -V RCH
?
Yes
Yes
Turn Off Charge
Enable I DETECT for
t DETECT
V CSOUT < VOREG -
V RCH ?
Battery Removed
Yes
Reset Charge
Parameters
No
No
Wait Mode
Delay TINT
Charge Complete
Indicate DONE
V CSOUT < V OREG -
VRCH ?
Yes
Figure 19. Operational Flow Chart of bq24157S in Charge Mode
14
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Product Folder Links: bq24157S
Copyright © 2013â2015, Texas Instruments Incorporated
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