BQ24630 Datasheet, PDF (7/33 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with System Power Selector and Low Iq

bq24630
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SLUS894 – JANUARY 2010
ELECTRICAL CHARACTERISTICS (continued)
5.0V ≤ V(VCC) ≤28V, 0°C<T_J<+125°C,typical values are at T_A=25°C, with respect to GND unless otherwise noted
PARAMETER
TEST CONDITIONS
MIN TYP MAX
AC SWITCH (ACFET) DRIVER
R_{DS_AC_OFF}
R_{DS_AC_ON}
V_{ACDRV_REG}
ACFET turn-off resistance
ACFET turn-on resistance
ACFET drive voltage
V_VCC > 5V
30
V_VCC > 5V
20
V_{ACDRV_REG} = V_VCC – V_ACDRV when V_VCC > 5 V and
ACFET is on
4.2
7
AC / BAT MOSFET DRIVERS TIMING
Driver dead time
Dead time when switching between AC and BAT
10
BATTERY DETECTION
t_WAKE
Wake timer
I_WAKE
Wake Current
t_DISCHARGE
Discharge timer
I_DISCHARGE
Discharge current
I_FAULT
Fault current after a timeout fault
V_WAKE
Wake threshold ( with-respect-to V_REG)
V_DISCH
Discharge threshold
PWM HIGH SIDE DRIVER (HIDRV)
Max time charge is enabled
R_SENSE = 10 mΩ
Max time discharge current is applied
Voltage on VFB to detect battery absent during Wake
Voltage on VFB to detect battery absent during Discharge
500
50
125
200
1
8
2
125
0.35
R_{DS_HI_ON}
High Side driver (HSD) turn-on resistance
R_{DS_HI_OFF}
High Side driver turn-off resistance
V_{BTST_REFRESH}
Bootstrap refresh comparator threshold
voltage
V_BTST – V_PH = 5.5 V
V_BTST – V_PH = 5.5 V
V_BTST – V_PH when low side refresh pulse is requested
3.3
6
1
1.3
4.0
4.2
PWM LOW SIDE DRIVER (LODRV)
R_{DS_LO_ON}
Low side driver (LSD) turn-on resistance
R_{DS_LO_OFF}
Low side driver turn-off resistance
PWM DRIVERS TIMING
4.1
7
1
1.4
Driver dead time
Dead time when switching between LSD and HSD, no
30
load at LSD and HSD
PWM OSCILLATOR
V_{RAMP_HEIGHT} PWM ramp height
PWM switching frequency⁽²⁾
As percentage of VCC
7
255
300
345
INTERNAL SOFT START (8 steps to regulation current ICHG)
Soft start steps
8
Soft start step time
1.6
CHARGER SECTION POWER-UP SEQUENCING
Charge-enable delay after power-up
Delay from when adapter is detected to when the charger
is allowed to turn on
1.5
LOGIC IO PIN CHARACTERISTICS
V_{IN_LO}
CE input low threshold voltage
0.8
V_{IN_HI}
CE input high threshold voltage
2.1
V_{BIAS_CE}
CE input bias current
V = 3.3 V (CE has internal 1MΩ pulldown resistor)
6
V_{OUT_LO}
STAT1, STAT2, PG output low saturation
voltage
Sink current = 5 mA
0.5
I_{OUT_HI}
Leakage current
V = 32 V
1.2
(2) Verified by design
UNIT
Ώ
kΏ
V
ms
ms
mA
sec
mA
mA
mV
V
Ω
Ω
V
Ω
Ω
ns
%
kHz
step
ms
s
V
V
mA
V
µA
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