BQ24702_16 Datasheet, PDF (7/37 Pages) Texas Instruments – MULTICHEMISTRY BATTERY CHARGER CONTROLLER

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bq24702
bq24703
SLUS553E – MAY 2003 – REVISED OCTOBER 2007
ELECTRICAL CHARACTERISTICS (Continued)
–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
ADAPTER CURRENT-SENSE AMPLIFIER
g_m
Transconductance gain
CMRR Common-mode rejection ratio
See ⁽¹⁾
75
130
90
V_ICR
I_(SINK)
I_IB
V_(SET)
A_V
Common-mode input voltage range (ACP)
Sink current (COMP)
Input bias current (ACP, ACN)
Input bias current accuracy ratio
(I_(ACP), I_(ACN))
AC current programming voltage (ACSET)
AC current set gain
Total ac current-sense mid-scale accuracy
Total ac current-sense full-scale accuracy
COMP = 1 V, (ACP – ACN) = 10 mV
ACP = ACN = 28 V, VCC = 28 V, ACSET = 2.5
V
ACP = ACN = 28 V, VCC = 28 V,
ACSET = 2.5 V, 0 ≤ T_J ≤ 125°C
0.65 V ≤ ACSET ≤ 2.5 V, 12 V ≤ ACP ≤ 20 V⁽¹⁾
ACSET = 1.25 V, T_J = 25°C⁽²⁾
ACSET = 1.25 V⁽²⁾
ACSET = 2.5 V, T_J = 25°C⁽²⁾
ACSET = 2.5 V⁽²⁾
7
0.5
40
–3
0
24.5
–5%
–6%
–3.5%
–4%
1.5
50
0
25.3
BATTERY VOLTAGE ERROR AMPLIFIER
g_m
Transconductance gain
CMRR Common-mode rejection ratio
See ⁽¹⁾
75
135
90
V_ICR
BATSET common-mode input voltage
range
1
V_IT
Internal reference override input threshold
voltage
0.20 0.25
I_(SINK) Sink current COMP
COMP = 1 V, (BATP–BATSET) = 10 mV,
BATSET = 1.25 V
0.5
1.5
V_(FB)
Error-amplifier precision reference voltage
T_J = 25°C
T_J = 0°C to 85°C
T_J = –40°C to 125°C
1.190
1.183
1.178
1.196
1.196
1.196
(1)
Calculation
of
the
ac
IAC
current:
+
ACSET
RSENSE
1
AV
(2) Total ac-current set accuracy is based on the measured value of (ACP-ACN) = Δc, using the measured gain, A_V.
Dc
+
ACSET
AV
,
Total accuracy in %
(Dm * Dc)
+ _Dc
100, I_(ACP) * I_(ACN) + 0
MAX UNIT
175 mA/V
dB
V_CC V
2.5 mA
65
A
3
2.5 V
26.5 V/V
5%
6%
3.5%
4%
175 mA/V
dB
2.5 V
0.35 V
2.5 mA
1.202
1.203 V
1.204
Copyright © 2003–2007, Texas Instruments Incorporated
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