BQ24745_14 Datasheet, PDF (5/39 Pages) Texas Instruments – SMBus-Controlled Multi-Chemistry Battery

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bq24745
SLUS761D – DECEMBER 2007 – REVISED OCTOBER 2011
PIN
NO. NAME
25 BOOT
26 ICOUT
27 CSSN
28 CSSP
Table 1. PIN FUNCTIONS – 28-PIN QFN (continued)
FUNCTION
PWM high-side driver positive supply. Connect a 0.1-μF bootstrap ceramic capacitor from BOOT to PHASE. Connect
a small bootstrap Schottky diode from VDDP to BOOT.
Input-current comparator active-high open-drain logic output. Place a 10-kΩ pullup resistor from the ICOUT pin to the
pullup voltage rail. Place a positive-feedback resistor from the ICOUT pin to the ICREF pin for programming
hysteresis. The output is HI when the VICM pin voltage is lower than the ICREF pin voltage. The output is LO when
VICM pin voltage is higher than ICREF pin voltage.
Adapter current-sense resistor, negative input. An optional 0.1-μF ceramic capacitor is placed from the CSSN pin to
GND for common-mode filtering. A 0.1-μF ceramic capacitor is placed from CSSN to CSSP to provide
differential-mode filtering.
Adapter current-sense resistor, positive input. A 0.1-μF ceramic capacitor is placed from the CSSP pin to GND for
common-mode filtering. A 0.1-μF ceramic capacitor is placed from CSSN to CSSP to provide differential-mode
filtering.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)^{(1) (2)}
DCIN, CSOP, CSON, CSSP, CSSN, VFB, ACOK
PHASE
EAI, EAO, FBO, VDDP, LGATE, ACIN, VICM, ICOUT, ICREF, CE
Voltage range
VDDSMB, SDA, SCL
VREF
BOOT, UGATE with respect to GND and PGND
Maximum difference voltage: CSOP–CSON, CSSP–CSSN
Junction temperature range
Storage temperature range
VALUE
–0.3 to 30
–1 to 30
–0.3 to 7
–0.3 to 6
–0.3 to 3.6
–0.3 to 36
–0.5 to 0.5
–40 to 155
–55 to 155
UNIT
V
°C
°C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND if not specified. Currents are positive into, and negative out of the specified terminal. Consult
Packaging Section of the data book for thermal limitations and considerations of packages.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
PHASE
DCIN, CSOP, CSON, CSSP, CSSN, VFB, ACOK
VDDP, LGATE
Voltage range VREF
EAI, EAO, FBO, ACIN, VICM, ICOUT, ICREF, CE
BOOT, UGATE with respect to GND and PGND
VDDSMB, SDA, SCL
Maximum difference voltage: CSOP–CSON, CSSP–CSSN
Junction temperature range
Storage temperature range
MIN NOM
–0.7
0
0
0
0
0
–0.3
–40
–55
MAX
24
24
6.5
3.3
5.5
30
5.5
0.3
125
150
UNIT
V
°C
°C
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