BQ24702_16 Datasheet, PDF (9/37 Pages) Texas Instruments – MULTICHEMISTRY BATTERY CHARGER CONTROLLER

www.ti.com
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
MOSFET GATE DRIVE
AC driver R_DS(on) high
V_CC = 18 V, I_(ACDRV) = 1 mA
85
AC driver R_DS(on) low
V_CC = 18 V, I_(ACDRV) = 1 mA
55
Battery driver R_DS(on) high
V_CC = 18 V, I_(BATDRV) = 1 mA
315
Battery driver R_DS(on) low
V_CC = 18 V, I_(BATDRV) = 1 mA
70
t_da
Time delay from ac driver off to
battery driver on
ACSEL 2.4 V ^ 0.2 V
1.2
t_db
Time delay from battery driver off to
ac driver on
ACSEL 0.2 V $ 2.4 V
2.4
V_OH
V_OL
SELECTOR
PWM driver high-level output
voltage
PWM driver R_DS(on) high
PWM driver low-level output voltage
PWM driver R_DS(on) low
I_O = –10 mA, VCC = 18 V
I_O = –50 mA, VCC = 18 V
I_O = 10 mA, VCC = 18 V
I_O = 50 mA, VCC = 18 V
V_CC –0.18
V_CC –1.2
V_CC –0.09
V_CC –0.8
7
V_HSP+0.1
V_HSP+0.6
5
V_(ACPRES)
AC presence detect voltage
–40°C to 85°C
1.194
1.208
1.246
1.246
V_IT(ACPRES)
t_d(ACPRES)
V_(BATDEP)
V_(NOBAT)
AC presence hysteresis
Deglitch delay for adapter insertion
Battery depletion ALARM trip
voltage
No battery detect, switch to ACDRV
See ⁽¹⁾
–40°C to 85°C
bq24702 only⁽¹⁾
–40°C to 85°C
1.194
1.208
0.869
0.880
1%
100
1.246
1.246
1
1
t_(BATSEL)
Battery select time (ACSEL low to VS < BATP, 50% threshold, ACSEL
BATDRV low)
2.4 V ↓ 0.2 V
1
2.5
t_(ACSEL)
AC select time (ACSEL high to
ACDRV low)
ACSEL 0.2 V ↑ 2.4 V
1
2.5
V_(VS)
VS voltage to enable BATDRV
V_IT(VS)
VS voltage hysteresis
ZERO VOLT OPERATION⁽²⁾
BATP = 1 V
VS > BATP
0.98
1
20
35
r_DS(on)
Static drain source on-state
resistance
V_CC = 7 V, T_J = 125°C, I_O = 100 mA
5.3
Zero volt operation threshold
BATDEP increasing
BATDEP decreasing
0.743
0.570
0.794
0.62
MAX
150
110
600
115
2
3.3
14
V_HSP+0.4
V_HSP+1.2
8.5
1.286
1.285
1.286
1.285
1.144
1.118
3.5
5
1.02
85
8.7
0.840
0.656
UNIT
Ω
Ω
Ω
Ω
μs
μs
V
Ω
V
Ω
V
μs
V
V
μs
μs
V
mV
Ω
V
(1) Total battery current readback accuracy is based on the measured value of V_IBAT, V_IBATm, and the calculated value of V_IBAT, V_IBATc,
using the measured value of the transfer gain, GTR.
VIBATc + (SRP * SRN)
GTR
Total
Accuracy
in
%
+
VIBATm * VIBATc
VIBATm
100
(2) See Table 1 to determine the logic operation of the bq24702 and the bq24703.
Copyright © 2003–2007, Texas Instruments Incorporated
Submit Documentation Feedback
9
Product Folder Link(s): bq24702 bq24703