Datasheet

bq77PL900
www.ti.com ...................................................................................................................................................... SLUS844B – JUNE 2008 – REVISED JANUARY 2009
ELECTRICAL CHARACTERISTICS (continued)
BAT = PACK = 7 V to 50 V, T
A
= – 25 ° C to 85 ° C, typical values stated where T
A
= 25 ° C and BAT = PACK = 36 V (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VLOG = 3.3 V 50 150 250
V
POR_HYS
Positive-going hysteresis mV
VLOG = 5 V 100 250 400
t
RST
Reset delay time 1 5 ms
CELL VOLTAGE MONITOR
VCn – VCn + 1 = 0 V , 20 V ≤ BAT ≤ 50 V, VGAIN = Low 0.925 0.975 1.025
V
CELL OUT
CELL output VCn – VCn + 1 = 0 V , 20 V ≤ BAT ≤ 50 V, VGAIN = High 1.12 1.2 1.28 V
VCn – VCn + 1 = 4.5 V , 20 V ≤ BAT ≤ 50 V 0.3
REF 1 CELL output Mode
(3)
, 20 V ≤ BAT or PACK ≤ 50 V, VGAIN = Low – 2% 0.975 2% V
REF 2 CELL output Mode
(4)
, 20 V ≤ BAT or PACK ≤ 50 V, VGAIN = High – 2% 1.2 2% V
PACK CELL output Mode
(5)
– 5% PACK/50 5% V
BAT CELL output Mode
(6)
– 5% BAT/50 5% V
CMRR Common-mode rejection CELL max to CELL min, 20 V ≤ BAT ≤ 50 V 40 dB
K = {CELL output (VC11 = 0 V, VC10 = 4.5 V) – CELL output
0.147 0.15 0.153
(VC11 = VC10 = 0 V)} / 4.5
(7)
K1 CELL scale factor 1
K = {CELL output (VC2 = 40.5 V, VC1 = 45 V) – CELL output (VC2 = VC1
0.147 0.15 0.153
= 40.5 V)} / 4.5
(7)
K = {CELL output (VC11 = 0 V, VC10 = 4.5 V) – CELL output (VC11 =
0.197 0.201 0.205
VC10 = 0 V)} / 4.5
(8)
K2 CELL scale factor 2
K = {CELL output (VC2 = 40.5 V, VC1 = 45 V) – CELL output (VC2 = VC1
0.197 0.201 0.205
= 40.5 V)} / 4.5
(8)
I
VCELLOUT
Drive current VCn – VCn + 1= 0 V, Vcell = 0 V, T
A
= – 40 to 100 ° C 12 18 µ A
V
ICR
CELL output offset error CELL output (VC2 = 45 V, VC1 = 45 V) – CELL output (VC2 = VC1 = 0 V) – 1 mV
Cell balance internal
R
BAL
RDS
(ON)
for internal FET switch at V
DS
= 2 V, BAT = PACK = 35 V – 50% 400 50% Ω
resistance
CURRENT MONITOR
V
IOUT
Output voltage VSRP = VSRN = 0 V
(9)
1.2 V
VSRP = VSRN = 0 V
(9)
, T
A
= 25 ° C – 3 3
V
OFFSET
Input offset voltage mV
VSRP = VSRN = 0 V
(9)
, T
A
= – 40 ° C to 100 ° C – 4 4
DC gain, low – 100 mV < SRP < 100 mV
(10)
– 2% 10 2%
DC gain, high – 20 mV < SRP < 20 mV
(11)
– 2% 50 2%
I
IOUT
Drive current V
IOUT
= 0 V, T
A
= – 40 ° C to 100 ° C 12 18 µ A
(3) STATE_CONTROL [VGAIN] = 0, FUNCTION_CONTROL [VAEN] = 1, CELL_SEL[CAL2] = 0, [CAL0] = 1, [CAL0] = 1
(4) STATE_CONTROL [VGAIN] = 1, FUNCTION_CONTROL [VAEN] = 1, CELL_SEL[CAL2] = 0, [CAL0] = 1, [CAL0] = 1
(5) STATE_CONTROL [VGAIN] = X, FUNCTION_CONTROL [PACK] = 1, [VAEN] = 1
(6) STATE_CONTROL [VGAIN] = X, FUNCTION_CONTROL [BAT] = 1, [VAEN] = 1
(7) STATE_CONTROL [VGAIN] = 0, FUNCTION_CONTROL [VAEN] = 1, CELL_SEL[CAL2] = 0, [CAL0] = 0, [CAL0
(8) STATE_CONTROL [VGAIN] = 1, FUNCTION_CONTROL [VAEN] = 1, CELL_SEL[CAL2] = 0, [CAL0] = 0, [CAL0] = 0
(9) STATE_CONTROL [IGAIN] = X, FUNCTION_CONTROL [IAEN] = 1, [IACAL] = 1
(10) STATE_CONTROL [IGAIN] = 0, FUNCTION_CONTROL [IAEN] = 1, [IACAL] = 0
(11) STATE_CONTROL [IGAIN] = 1, FUNCTION_CONTROL [IAEN] = 1, [IACAL] = 0
Copyright © 2008 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): bq77PL900