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ELECTRICAL CHARACTERISTICS (Continued)
(1) Calculation of the ac current:
I
AC
+
ACSET
R
SENSE
1
A
V
Dc +
ACSET
A
V
, Total accuracy in % +
(
Dm * Dc
)
Dc
100,I
(ACP)
* I
(ACN)
+ 0
bq24702
bq24703
SLUS553E – MAY 2003 – REVISED OCTOBER 2007
– 40 ° C ≤ T
J
≤ 125 ° C, 7 V
DC
≤ V
CC
≤ 28 V
DC
, all voltages relative to V
SS
, (unless otherwise specified)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ADAPTER CURRENT-SENSE AMPLIFIER
g
m
Transconductance gain 75 130 175 mA/V
CMRR Common-mode rejection ratio See
(1)
90 dB
V
ICR
Common-mode input voltage range (ACP) 7 V
CC
V
I
(SINK)
Sink current (COMP) COMP = 1 V, (ACP – ACN) = 10 mV 0.5 1.5 2.5 mA
ACP = ACN = 28 V, VCC = 28 V, ACSET = 2.5
Input bias current (ACP, ACN) 40 50 65
V
I
IB
A
Input bias current accuracy ratio ACP = ACN = 28 V, VCC = 28 V,
– 3 0 3
(I
(ACP)
, I
(ACN)
) ACSET = 2.5 V, 0 ≤ T
J
≤ 125 ° C
V
(SET)
AC current programming voltage (ACSET) 0 2.5 V
A
V
AC current set gain 0.65 V ≤ ACSET ≤ 2.5 V, 12 V ≤ ACP ≤ 20 V
(1)
24.5 25.3 26.5 V/V
ACSET = 1.25 V, T
J
= 25 ° C
(2)
– 5% 5%
Total ac current-sense mid-scale accuracy
ACSET = 1.25 V
(2)
– 6% 6%
Total ac current-sense full-scale accuracy ACSET = 2.5 V, T
J
= 25 ° C
(2)
– 3.5% 3.5%
ACSET = 2.5 V
(2)
– 4% 4%
BATTERY VOLTAGE ERROR AMPLIFIER
g
m
Transconductance gain 75 135 175 mA/V
CMRR Common-mode rejection ratio See
(1)
90 dB
BATSET common-mode input voltage
V
ICR
1 2.5 V
range
Internal reference override input threshold
V
IT
0.20 0.25 0.35 V
voltage
COMP = 1 V, (BATP – BATSET) = 10 mV,
I
(SINK)
Sink current COMP 0.5 1.5 2.5 mA
BATSET = 1.25 V
T
J
= 25 ° C 1.190 1.196 1.202
V
(FB)
Error-amplifier precision reference voltage T
J
= 0 ° C to 85 ° C 1.183 1.196 1.203 V
T
J
= – 40 ° C to 125 ° C 1.178 1.196 1.204
(2) Total ac-current set accuracy is based on the measured value of (ACP-ACN) = Δ c, using the measured gain, A
V.
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