BQ25703A Datasheet, PDF (15/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

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Electrical Characteristics (continued)
over T_J = –40 to 125°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_{INDEP_CMP_HYS}
Independent comparator
hysteresis
Reg0x06[6] = 0, CMPIN
falling
POWER MOSFET DRIVER
PWM OSCILLATOR AND RAMP
Reg0x01[1] = 0
F_SW
PWM switching frequency
Reg0x01[1] = 1
BATFET GATE DRIVER (BATDRV)
V_{BATDRV_ON}
Gate drive voltage on
BATFET
V_{BATDRV_DIODE}
Drain-source voltage on
BATFET during ideal diode
operation
R_{BATDRV_ON}
Measured by sourcing 10-µA
current to BATDRV
R_{BATDRV_OFF}
Measured by sinking 10-µA
current from BATDRV
PWM HIGH SIDE DRIVER (HIDRV Q1)
R_{DS_HI_ON_Q1}
High side driver (HSD) turnon
resistance
V_BTST1 – V_SW1 = 5 V
R_{DS_HI_OFF_Q1}
High side driver turnoff
resistance
V_BTST1 – V_SW1 = 5 V
V_{BTST1_REFRESH}
Bootstrap refresh comparator
falling threshold voltage
V_BTST1 – V_SW1 when low
side refresh pulse is
requested
PWM HIGH SIDE DRIVER (HIDRV Q4)
R_{DS_HI_ON_Q4}
High side driver (HSD) turnon
resistance
V_BTST2 – V_SW2 = 5 V
R_{DS_HI_OFF_Q4}
High side driver turnoff
resistance
V_BTST2 – V_SW2 = 5 V
V_{BTST2_REFRESH}
Bootstrap refresh comparator
falling threshold voltage
V_BTST2 – V_SW2 when low
side refresh pulse is
requested
PWM LOW SIDE DRIVER (LODRV Q2)
R_{DS_LO_ON_Q2}
Low side driver (LSD) turnon
resistance
V_BTST1 – V_SW1 = 5.5 V
R_{DS_LO_OFF_Q2}
Low side driver turnoff
resistance
V_BTST1 – V_SW1 = 5.5 V
PWM LOW SIDE DRIVER (LODRV Q3)
R_{DS_LO_ON_Q3}
Low side driver (LSD) turnon
resistance
V_BTST2 – V_SW2 = 5.5 V
R_{DS_LO_OFF_Q3}
Low side driver turnoff
resistance
V_BTST2 – V_SW2 = 5.5 V
INTERNAL SOFT START During Charge Enable
SSSTEP_DAC
Soft Start Step Size
SSSTEP_DAC
Soft Start Step Time
INTEGRATED BTST DIODE (D1)
V_{F_D1}
Forward bias voltage
V_{R_D1}
Reverse breakdown voltage
INTEGRATED BTST DIODE (D2)
I_F = 20 mA at 25°C
I_R = 2 µA at 25°C
V_{F_D2}
Forward bias voltage
V_{R_D2}
Reverse breakdown voltage
PWM DRIVERS TIMING
I_F = 20 mA at 25°C
I_R = 2 µA at 25°C
Copyright © 2017, Texas Instruments Incorporated
bq25703A
SLUSCU1 – MAY 2017
MIN
TYP
MAX UNIT
100
mV
1020
680
8.5
3
3.2
1200
800
10
30
4
1.2
1380 kHz
920 kHz
11.5 V
mV
6 kΏ
2.1 kΏ
6
Ω
1.3
2.2 Ω
3.7
4.6 V
6
Ω
1.5
2.4 Ω
3.3
3.7
4.6 V
6
Ω
1.7
2.6 Ω
7.6
Ω
2.9
4.6 Ω
64
mA
8
µs
0.8
V
20 V
0.8
V
20 V
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