BQ24620 Datasheet, PDF (7/30 Pages) Texas Instruments – Stand-Alone Synchronous Switch-Mode Lithium Phosphate Battery Charger with Low Iq

bq24620
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SLUS893 – MARCH 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
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 I_CHARGE)
Soft start steps
8
Soft start step time
1.6
CHARGER SECTION POWER-UP SEQUENCING
Charge-enable delay after power-up
Delay from when CE = 1 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}
STAT, PG output low saturation voltage Sink current = 5 mA
0.5
I_{OUT_HI}
Leakage Current
V = 32V
1.2
(2) Verified by design
UNIT
kHz
step
ms
s
V
V
mA
V
µA
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