BQ24616 Datasheet, PDF (8/34 Pages) Texas Instruments – JEITA Guideline Compatible Stand-Alone Synchronous Switch-Mode Li-Ion or Li-Polymer Battery Charger with System Power Selector and Low Iq

bq24616
SLUSA49A – APRIL 2010 – REVISED MAY 2010
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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 UNIT
BATTERY DETECTION
t_WAKE
I_WAKE
t_DISCHARGE
I_DISCHARGE
I_FAULT
V_WAKE
V_DISCH
Wake time
Wake current
Discharge time
Discharge current
Fault current after a timeout fault
Wake threshold (with-respect-to V_REG)
Discharge threshold
Max time charge is enabled
R_SENSE = 10mΩ
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
1
8
2
50
1.55
ms
200 mA
sec
mA
mA
mV
V
PWM HIGH SIDE DRIVER (HIDRV)
R_{DS_HI_ON}
High side driver (HSD) turn-on
resistance
V_BTST – V_PH = 5.5 V
3.3
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
V_BTST – V_PH when low side refresh pulse is requested
1
1.3
Ω
4.0
4.2
V
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
Ω
1
1.4
Ω
Driver dead time
Dead time when switching between LSD and HSD, no
load at LSD and HSD
30
ns
PWM OSCILLATOR
V_{RAMP_HEIGHT}
PWM ramp height
PWM switching frequency
As percentage of VCC
7
%
510
600
690 kHz
INTERNAL SOFT START (8 steps to regulation current ICHG)
Soft start steps
8
step
Soft start step time
1.6
ms
CHARGER SECTION POWER-UP SEQUENCING
Charge-enable delay after power-up
Delay from CE=1 to charger is allowed to turn on
1.5
s
LOGIC IO PIN CHARACTERISTICS (CE, STAT1, STAT2, PG)
V_{IN_LO}
V_{IN_HI}
V_{BIAS_CE}
V_{OUT_LO}
CE input low threshold voltage
CE input high threshold voltage
2.1
CE input bias current
V = 3.3V (CE has internal 1MΩ pulldown resistor)
STAT1, STAT2, PG output low
saturation voltage
Sink Current = 5 mA
0.8
V
6 mA
0.5
V
I_{OUT_HI}
Leakage current
V = 32 V
1.2 µA
8
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