BQ24740_14 Datasheet, PDF (10/33 Pages) Texas Instruments – Host-Controlled Multi-Chemistry Battery Charger

bq24740
SLUS736C – DECEMBER 2006 – REVISED MARCH 2009............................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
7 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
QUIESCENT CURRENT
I_{OFF_STATE}
I_{BATQ_CD}
Total off-state quiescent current into pins
SRP, SRN, BAT, BTST, PH, PVCC, ACP,
ACN
Total quiescent current into pins SRP,
SRN, BAT, BTST, PH
V_BAT = 16.8 V, V_ACDET < 0.6 V,
V_PVCC > 5 V, T_J = 85°C
V_BAT = 16.8 V, V_ACDET < 0.6 V,
V_PVCC > 5 V, T_J = 125°C
Adapter present, VACDET >2.4V,
charge disabled
7
10
7
11 µA
100 200
I_AC
Adapter quiescent current
INTERNAL SOFT START (8 steps to regulation current)
V_PVCC = 20 V, charge disabled
2.8
4 mA
Soft start steps
8
step
Soft start step time
1.7
ms
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
518 700 908 ms
ISYNSET AMPLIFIER AND COMPARATOR (SYNCHRONOUS TO NON-SYNCHRONOUS TRANSITION)
I_SYN Accuracy
ISYNSET pin voltage
V_(SRP-SRN) = 5 mV
–20%
20%
1
V
V_ISYNSET
ISYNSET rising deglitch
ISYNSET falling deglitch
20
µs
640
µs
LOGIC IO PIN CHARACTERISTICS (CHGEN, IADSLP )
V_{IN_LO}
Input low threshold voltage
V_{IN_HI}
Input high threshold voltage
I_BIAS
Input bias current
LOGIC INPUT PIN CHARACTERISTICS (CELLS)
V_CHGEN = 0 to V_REGN
0.8 V
2.1
1 µA
V_{IN_LO}
V_{IN_MID}
Input low threshold voltage, 3 cells
Input mid threshold voltage, 2 cells
CELLS voltage falling edge
CELLS voltage rising for MIN,
CELLS voltage falling for MAX
0.5
0.8
1.8 V
V_{IN_HI}
Input high threshold voltage, 4 cells
CELLS voltage rising
I_{BIAS_FLOAT}
Input bias float current for 2-cell selection V = 0 to V
OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (EXTPWR)
2.5
–1
1 µA
V_{OUT_LO}
Output low saturation voltage
Delay, EXTPWR falling
Sink Current = 4 mA
0.5 V
518 700 908 ms
Delay, EXTPWR rising
7
9
11 ms
OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (DPMDET, LPMD)
V_{OUT_LO}
Output low saturation voltage
Delay, rising/falling
Sink Current = 5 mA
0.5 V
10
ms
10
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