BQ2947_16 Datasheet, PDF (6/24 Pages) Texas Instruments – Overvoltage Protection for 2-Series to 4-Series Cell Li-Ion Batteries

bq2947
SLUSB15E – SEPTEMBER 2012 – REVISED FEBRUARY 2016
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Electrical Characteristics (continued)
Typical values stated where T_A = 25°C and VDD = 14.4 V, MIN/MAX values stated where T_A = –40°C to 110°C and V_DD = 3 V
to 20 V (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
OUTPUT DRIVE OUT, CMOS ACTIVE HIGH VERSIONS ONLY
V_OUT
Output Drive Voltage,
Active High
(V4–V3), (V3–V2), (V2–V1), or (V1–VSS) > V_OV,
VDD = 14.4 V, I_OH = 100 µA
If three of four cells are short circuited, only one
cell remains powered and > V_OV, VDD = Vx (cell
voltage), I_OH = 100 µA
(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < V_OV,
VDD = 14.4 V, I_OL = 100 µA measured into OUT
pin.
6
VDD –
0.3
250
V
V
400 mV
I_OUTH
OUT Source Current
(during OV)
(V4–V3), (V3–V2), (V2–V1), or (V1–VSS) > V_OV,
VDD = 14.4 V,
OUT = 0 V, measured out of OUT pin.
4.5 mA
I_OUTL
(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < V_OV,
OUT Sink Current (no
OV)
VDD = 14.4 V,
OUT = VDD, measured into OUT pin .Pull resistor
0.5
R_PU = 5 kΩ to VDD = 14.4 V
OUTPUT DRIVE OUT, CMOS OPEN DRAIN ACTIVE LOW VERSIONS ONLY
14 mA
V_OUT
Output Drive Voltage,
Active High
(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < V_OV,
VDD = 14.4 V, I_OL = 100 µA measured into OUT
pin.
250
400 mV
I_OUTL
I_OUTLK
(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < V_OV,
OUT Sink Current (no
OV)
VDD = 14.4 V,
OUT = VDD, measured into OUT pin. Pull resistor
0.5
R_PU = 5 kΩ to VDD = 14.4 V
OUT pin leakage
(V4–V3), (V3–V2), (V2–V1), and (V1–VSS) < V_OV,
VDD = 14.4 V,
OUT = VDD, measured into OUT pin.
14 mA
100
nA
DELAY TIMER
t_CD
t_{CD_GND}
OV Delay Time
OV Delay Time with CD
pin = 0 V
C_CD = 0.1 µF (see Equation 1)
Delay due to C_CD capacitor shorted to ground for
Customer Test Mode
1
1.5
2
s
20
170 ms
6
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