BQ25050 Datasheet, PDF (19/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

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bq25050
SLUSA33 – MARCH 2010
Any
State
IC Enabled
CTRL
Rising Edge
NO
Detected?
YES
Begin 1.5ms OFF
Timer
Falling Edge NO
Detected?
YES
NO
Has 1.5ms OFF
Timer Expired?
YES
Disable IC
Turn off Charge
Turn ON BGATE
/CHG = Hi-Z
Go to IC
Disabled
Routine
Increment Pulse
Counter
Begin 1.5ms
LATCH Timer
YES
CTRL
Rising Edge
NO
Detected?
NO
Has 1.5ms
LATCH Timer
Expired?
YES
IC Disabled
Send Pulse
Counter Info to
Decode Block
YES
#PULSE = 1?
Force Charge Termination
NO
YES
#PULSE = 2?
NO
Force BGATE On
Disabled
#PULSE = 3? ^YES
Force BGATE On
Enabled
NO
YES
100mA Mode
#PULSE = 4?
ICHARGE = 95mA (100mA)
NO
#PULSE = 5?
YES
200mA Mode
ICHARGE = 190mA (200mA)
NO
#PULSE = 6?
YES
300mA Mode
ICHARGE = 285mA (300mA)
NO
#PULSE = 7?
YES
400mA Mode
ICHARGE = 380mA (400mA)
NO
#PULSE = 8?
YES
500mA Mode
ICHARGE = 475mA (500mA)
NO
YES
700mA Mode
#PULSE = 9?
ICHARGE = 665mA (700mA)
NO
YES
850mA Mode
#PULSE = 10?
ICHARGE = 807.5mA (850mA)
CTRL = 0?
NO
YES
300mA Mode
ICHARGE = 285mA
VIN-DPM Enabled
Begin Battery
Charging
YES
#PULSE = 11?
1A Mode
ICHARGE = 950mA (1A)
NO
YES
#PULSE = 12?
TS Range = 0C to 60C
NO
Disable VIN_DPM
Figure 26. CTRL Flow Diagram
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