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BQ24150A Datasheet, PDF (30/41 Pages) Texas Instruments – Fully Integrated Switch-Mode One-Cell Li-Ion Charger With Full USB Compliance and USB-OTG Support
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bq24150A
bq24151A
SLUS931 – APRIL 2009 ..................................................................................................................................................................................................... www.ti.com
BIT
B2
B1
B0 (LSB)
Table 8. Vender/Part/Revision Register (Read only)
Memory Location: 03, Reset State: 0100 x001 (continued)
NAME
Revision2
Revision1
Revision0
READ/WRITE
Read Only
Read Only
Read Only
011: Revision 1.3;
100-111: Future Revisions
FUNCTION
BIT
B7 (MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
Table 9. Battery Termination/Fast Charge Current Register (Read/Write)
Memory Location: 04, Reset State: 1000 1001 (89H)
NAME
Reset
VI(CHRG2)
VI(CHRG1)
VI(CHRG0)
NA
VI(TERM2)
VI(TERM1)
VI(TERM0)
READ/WRITE
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
FUNCTION
Write: 1-Charger in reset mode, 0-No effect, Read: always get "1"
Charge current sense voltage: 27.2 mV (default 0)
Charge current sense voltage: 13.6 mV(default 0)
Charge current sense voltage: 6.8 mV (default 0)
NA
Termination current sense voltage: 13.6 mV (default 0)
Termination current sense voltage: 6.8 mV (default 0)
Termination current sense voltage: 3.4 mV (default 1)
Default charge current is 550 mA and default termination current is 100 mA, if a 68-mΩ sensing resistor is used.
Both the termination current range and charge current range are depending on the sensing resistor R(SNS)). The
termination current step (IO(TERM_STEP)) is calculated using Equation 2:
IO(TERM_STEP)
=
VI(TERM0)
R(SNS)
(2)
Table 10 shows the termination current settings with two sensing resistors.
Table 10. Termination Current Settings for 68-mΩ and 100-mΩ Sense Resistors
BIT
VI(TERM2)
VI(TERM1)
VI(TERM0)
Offset
VI(TERM) (mV)
13.6
6.8
3.4
3.4
I(TERM) (mA)
R(SNS) = 68mΩ
200
100
50
50
I(TERM) (mA)
R(SNS) = 100mΩ
136
68
34
34
The charge current step (IO(CHARGE_STEP)) is calculated using Equation 3:
IO(CHARGE_STEP)
=
VI(CHRG0)
R(SNS)
(3)
Table 11 shows the charge current settings with two sensing resistors.
Table 11. Charge Current Settings for 68-mΩ and 100-mΩ Sense Resistors
BIT
VI(CHRG2)
VI(CHRG1)
VI(CHRG0)
Offset
VI(REG) (mV)
27.2
13.6
6.8
37.4
IO(CHARGE) (mA)
R(SNS) = 68mΩ
400
200
100
550
IO(CHARGE) (mA)
R(SNS) = 100mΩ
272
136
68
374
30
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