BQ24721 Datasheet, PDF (8/48 Pages) Texas Instruments – ADVANCED MULTI-CHEMISTRY AND MULTI-CELL SYNCHRONOUS SWITCH-MODE CHARGER AND SYSTEM POWER SELECTOR

bq24721
SLUS683 – NOVEMBER 2005
ELECTRICAL CHARACTERISTICS
8 Vdc ≤ V_(VCC) ≤ 24 Vdc, 0°C ≤ T_J ≤ 125°C, all voltages with respect to AGND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
BYPASS P-Channel MOSFET DRIVER (BYPASS)
R_{(DS_BYP) Hi} BYPASS off-state resistance
Driver output = HI, BYPASS = V_(PVCC), V_(PVCC) = 18 V
R_{(DS_BYP) Lo} BYPASS on-state resistance
Driver output = LO,
BYPASS = V_(PVCC) - V_(REGBYPASS), V_(PVCC) = 18 V
Drive regulator turn-on voltage
V_(REGBYPASS) for BYPASS with respect to
V_{(VCC, BYPASS)}, V_(VCC) > 13 V, I_(BYPASS) = 5 mA
-5
V_(PVCC)
AC ADAPTER P-Channel MOSFET DRIVER (ACDRV)
R_{(DS_AC) Hi} ACDRV off-state resistance
Driver output = HI, ACDRV = PVCC, V_(PVCC) = 18 V
R_{(DS_AC) Lo} ACDRV on-state resistance
Driver output = LO, ACDRV =V_(PVCC)-V_(REGAC), V_(PVCC) = 18 V
Drive regulator turn-on voltage
V_(REGAC)
for ACDRV with respect to
V_{(VCC, ACDRV)}, V_(VCC) > 13 V, I_(ACDRV) = 5 mA
-5
V_(PVCC)
BATTERY P-Channel MOSFET DRIVER (BATDRV )
R_{(DS_BAT) Hi} BATDRV off-state resistance
Driver output = HI, V_(PVCC) = 18 V
R_{(DS_BAT) Lo} BATDRV on-state resistance
Driver output = LO, BATDRV=V_(PVCC)-V_(REGBAT), V_(PVCC) = 18 V
Drive regulator negative turn-on
V_(REGBAT)
voltage for BATDRV with
V_{(VCC, BATDRV)}, V_(VCC) > 13 V, I_(BATDRV) = 5 mA
-5
respect to V_(SYS)
SYSTEM POWER SELECTOR TIMING
Dead time when switching
between ACDRV and BATDRV
No load at ACDRV and BATDRV
BYPASS SWITCH TIMING
Delay to turn-off BYPASS
TYP
1
1
-6
100
10
-6.5
100
10
-6.5
1
1
www.ti.com
MAX UNIT
2 kΩ
2 kΩ
-7.5
V
150
Ω
20 kΩ
-7.5
V
150
Ω
20 kΩ
-7.5
V
µs
µs
8