BQ24751RHDRG4 Datasheet, PDF (9/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger

bq24751
www.ti.com............................................................................................................................................... SLUS734D – DECEMBER 2006 – REVISED MARCH 2009
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 Overvoltage rising threshold on
OVPSET
(See OVPSET in Table 1)
Measured on OVPSET
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
BATTERY SWITCH (BATDRV) DRIVER
Temperature Increasing
155
°C
20
°C
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_ACN > 5 V
160
Ω
V_ACN > 5 V
3
kΩ
V_{BATDRV_REG} = V_ACN – V_BATDRV when
V_ACN > 5 V and BATFET is on
6.5
V
Delay to turn off BATFET after adapter is
detected (after ACDET > 2.4)
518 700
908 ms
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)
6.5
518 700
80
Ω
2.5
kΩ
V
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}
R_{DS_HI_OFF}
V_{BTST_REFRESH}
High side driver turn-on resistance
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 = 5.5 V, tested at 100 mA
V_BTST – V_PH when low side refresh pulse
is requested
3
6
Ω
0.7
1.4
Ω
4
V
PWM LOW SIDE DRIVER (LODRV)
R_{DS_LO_ON}
Low side driver turn-on resistance
R_{DS_LO_OFF}
Low side driver turn-off resistance
PWM DRIVERS TIMING
REGN = 6 V, tested at 100 mA
REGN = 6 V, tested at 100 mA
3
6
Ω
0.6
1.2
Ω
Driver Dead Time — Dead time when
switching between LODRV and
HIDRV. No load at LODRV and
HIDRV
30
ns
PWM OSCILLATOR
F_SW
V_{RAMP_HEIGHT}
PWM switching frequency
PWM ramp height
As percentage of PVCC
240
6.6
360 kHz
%PVCC
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