BQ24750_07 Datasheet, PDF (9/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Integrated System Power Selector and AC Over-Power Protection

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bq24750
SLUS735 – DECEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
7.0 V ≤ V_PVCC≤ 24 V, 0°C < T_J < +125°C, typical values are at T_A = 25°C, with respect to AGND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
INPUT OVERVOLTAGE COMPARATOR (ACOV)
V_ACOV
AC Over-voltage rising threshold on
ACDET
(See ACDET in Terminal Functions)
Measured on ACDET
3.007 3.1 3.193
V
V_{ACOV_HYS}
AC Over-voltage rising deglitch
AC Over-voltage falling deglitch
1.3
ms
1.3
THERMAL SHUTDOWN COMPARATOR
T_SHUT
Thermal shutdown rising temperature
T_{SHUT_HYS}
Thermal shutdown hysteresis, falling
THERMISTER COMPARATOR (TS)
Temperature Increasing
155
°C
20
°C
V_LTF
V_{LTF_HYS}
V_TCO
V_HTF
Cold temperature rising threshold
Rising hysteresis
Cut-off temperature rising threshold
Hot temperature rising threshold
Deglitch time for temperature out of
range detection
Deglitch time for temperature in valid
range detection
BATTERY SWITCH (BATDRV) DRIVER
As percentage to V_VREF
As percentage to V_VREF
As percentage to V_VREF
As percentage to V_VREF
V_TS > V_LTF, or V_TS < V_TCO, or
V_TS < V_HTF
V_TS > V_LTF– V_{LTF_HYS} or V_TS > V_TCO,
or V_TS > V_HTF
72.5 73.8 74.2
0.5 1
1.5
%
28.7 29.3 29.9
33.7 34.4 35.1
10
ms
10
R_{DS_BAT_OFF}
R_{DS_BAT_ON}
V_{BATDRV_REG}
BATFET Turn-off resistance
BATFET Turn-on resistance
BATFET drive voltage
BATFET Power-up delay
V_PVCC > 5 V
160
Ω
V_PVCC > 5 V
3
kΩ
V_{BATDRV_REG} = V_PVCC– V_BATDRV when
V_PVCC > 5 V and BATFET is on
6.5
V
Delay to turn off BATFET after adapter is 518 700
908
ms
detected (after ACDET > 2.4)
AC SWITCH (ACDRV) DRIVER
R_{DS_AC_OFF}
R_{DS_AC_ON}
V_{ACDRV_REG}
ACFET turn-off resistance
ACFET turn-on resistance
ACFET drive voltage
ACFET Power-up Delay
V_PVCC > 5 V
V_PVCC > 5 V
V_{ACDRV_REG} = V_PVCC– V_ACDRV when
V_PVCC > 5 V and ACFET is on
Delay to turn on ACFET after adapter is
detected (after ACDET > 2.4)
80
Ω
2.5
kΩ
6.5
V
518 700
908
ms
AC / BAT MOSFET DRIVERS TIMING
Driver dead time
Dead time when switching between
ACDRV and BATDRV
10
µs
PWM HIGH SIDE DRIVER (HIDRV)
R_{DS_HI_ON}
High side driver (HSD) turn-on
resistance
V_BTST– V_PH = 5.5 V, tested at 100 mA
3
6
Ω
R_{DS_HI_OFF}
V_{BTST_REFRESH}
High side driver turn-off resistance
Bootstrap refresh comparator
threshold voltage
V_BTST– V_PH = 5.5 V, tested at 100 mA
V_BTST– V_PH when low side refresh pulse
is requested
0.7
4
1.4
Ω
V
PWM LOW SIDE DRIVER (LODRV)
R_{DS_LO_ON}
Low side driver (LSD) turn-on
resistance
REGN = 6 V, tested at 100 mA
3
6
Ω
R_{DS_LO_OFF}
Low side driver turn-off resistance
PWM DRIVERS TIMING
REGN = 6 V, tested at 100 mA
0.6
1.2
Ω
Driver Dead Time — Dead time when
switching between LODRV and
HIDRV. No load at LODRV and
HIDRV
30
ns
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