BQ24157 Datasheet, PDF (27/39 Pages) Texas Instruments – Fully Integrated Switch-Mode Charger With USB Compliance and USB-OTG Support

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bq24157
SLUSB80 – SEPTEMBER 2012
Table 5. Control/Battery Voltage Register (Read/Write)
Memory Location: 02, Reset State: 0000 1010 (continued)
BIT
B1
B0 (LSB)
NAME
OTG_PL
OTG_EN
READ/WRITE
Read/Write
Read/Write
FUNCTION
1-OTG Boost Enable with High level, 0-OTG Boost Enable with Low level (default 1);
not applicable to OTG pin control of current limit at POR in default mode
1-Enable OTG Pin in HOST mode, 0-Disable OTG pin in HOST mode (default 0), not
applicable to OTG pin control of current limit at POR in default mode
• Charge voltage range is 3.5 V to 4.44 V with the offset of 3.5 V and steps of 20 mV (default 3.54 V), using
bits B2-B7.
BIT
B7 (MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
NAME
Vender2
Vender1
Vender0
PN1
PN0
Revision2
Revision1
Revision0
Table 6. Vender/Part/Revision Register (Read only)
Memory Location: 03, Reset State: 0101 000x
READ/WRITE
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Vender Code: bit 2 (default 0)
Vender Code: bit 1 (default 1)
Vender Code: bit 0 (default 0)
FUNCTION
For I2C Address 6AH: 01–NA, 10–bq24157, 11–NA.
011: Revision 1.0;
001: Revision 1.1;
100-111: Future Revisions
Table 7. Battery Termination/Fast Charge Current Register (Read/Write)
Memory Location: 04, Reset State: 0000 0001
BIT
B7 (MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
NAME
Reset
V_I(CHRG3) ⁽¹⁾
V_I(CHRG2) ⁽¹⁾
V_I(CHRG1) ⁽¹⁾
V_I(CHRG0) ⁽¹⁾
V_I(TERM2) ⁽²⁾
V_I(TERM1) ⁽²⁾
V_I(TERM0) ⁽²⁾
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 "0"
Charge current sense voltage: 27.2 mV step
Charge current sense voltage: 13.6 mV step
Charge current sense voltage: 6.8 mV step
NA
Termination current sense voltage: 13.6 mV step (default 0)
Termination current sense voltage: 6.8 mV step (default 0)
Termination current sense voltage: 3.4 mV step (default 1)
(1) See Table 11
(2) See Table 10
• Charge current sense voltage offset is 37.4mV and default charge current is 550mA, if 68-mΩ sensing
resistor is used and LOW_CHG=0.
BIT
B7 (MSB)
B6
B5
B4
B3
B2
B1
B0 (LSB)
Table 8. Special Charger Voltage/Enable Pin Status Register
Memory location: 05, Reset state: 000X X100
NAME
NA
NA
LOW_CHG
DPM_STATUS
CD_STATUS
VSREG2
VSREG1
VSREG0
READ/WRITE
Read/Write
Read/Write
Read/Write
Read Only
Read Only
Read/Write
Read/Write
Read/Write
FUNCTION
NA
NA
0 – Normal charge current sense voltage at 04H,
1 – Low charge current sense voltage of 22.1mV (default 0)
0 – DPM mode is not active,
1 – DPM mode is active
0 – CD pin at LOW level,
1 – CD pin at HIGH level
Special charger voltage: 320mV step (default 1)
Special charger voltage: 160mV step (default 0)
Special charger voltage: 80mV step (default 0)
Copyright © 2012, Texas Instruments Incorporated
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