BQ24070 Datasheet, PDF (4/26 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

bq24070
SLUS694A – MARCH 2006 – REVISED MARCH 2006
www.ti.com
ELECTRICAL CHARACTERISTICS
over junction temperature range (0°C ≤ T_J ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
INPUT BIAS CURRENTS
I_CC(SPLY)
I_CC(SLP)
Active supply current, VCC
Sleep current (current into BAT
pin)
V_VCC > V_VCC(min)
V_IN < V_(BAT)
2.6 V ≤ V_I(BAT)≤ V_O(BAT-REG),
Excludes load on OUT pin
1
2 mA
2
5
I_CC(IN-STDBY)
Input standby current
I_{CC(BAT-STDBY)}
BAT standby current
I_IB(BAT)
Charge done current, BAT
OUT PIN-VOLTAGE REGULATION
V_I(AC) ≤ 6V, Total current into IN pin with
chip disabled, Excludes all loads,
CE=LOW, after t_(CE-HOLDOFF) delay
Total current into BAT pin with input
present and chip disabled;
Excludes all loads, CE=LOW,
after t_(CE-HOLDOFF) delay,
0°C ≤ T_J≤ 85°C
Charge DONE, input supplying the load
200
µA
45
65
1
5
V_O(OUT-REG)
Output regulation
voltage
V_I(AC)≥ 4.4 V+V_DO
4.4
4.5
V
OUT PIN – DPPM REGULATION
V_(DPPM-SET)
DPPM set point⁽¹⁾
V_DPPM-SET < V_OUT
I_(DPPM-SET)
DPPM current source
Input present
SF
DPPM scale factor
V_(DPPM-REG)= V_(DPPM-SET) × SF
OUT PIN – FET (Q1, Q2) DROP-OUT VOLTAGE ®_DS(on))
V_(ACDO)
AC to OUT dropout voltage⁽²⁾
V_I(AC)≥ V_CC(min), Mode = High,
I_I(AC) = 1 A, (I_O(OUT)+ I_O(BAT)), or no input
V_(BATDO)
BAT to OUT dropout voltage
(discharging)
V_{I (BAT)}≥ 3 V, I_i(BAT)= 1.0 A, V_CC < V_i(BAT)
2.6
95
1.139
100
1.150
300
40
3.8
V
105
µA
1.162
475
mV
100
OUT PIN - BATTERY SUPPLEMENT MODE
V_BSUP1
V_BSUP2
Enter battery supplement mode
(battery supplements OUT current V_I(BAT)> 2 V
in the presence of input source
Exit battery supplement mode
V_I(BAT)> 2 V
V_I(OUT)
≤ V_I(BAT)
– 60 mV
V
V_I(OUT)
≥ V_I(BAT)
– 20 mV
OUT PIN - SHORT CIRCUIT
I_OSH1
BAT to OUT short-circuit recovery
R_SHAC
AC to OUT short-circuit limit
BAT PIN CHARGING – PRECHARGE
Current source between BAT to OUT for
short-circuit recovery to
V_I(OUT)≤ V_I(BAT) –200 mV
V_I(OUT) ≤ 1 V
10
mA
500
Ω
V_(LOWV)
Precharge to fast-charge transition
threshold
Voltage on BAT
2.9
3
3.1
V
T_DGL(F)
Deglitch time for fast-charge to
precharge transition⁽³⁾
I_O(PRECHG)
Precharge range
V_(PRECHG)
Precharge set voltage
BAT PIN CHARGING - CURRENT REGULATION
t_FALL = 100 ns, 10 mV overdrive,
V_I(BAT) decreasing below threshold
1 V < V_I(BAT) < V_(LOWV), t < t_(PRECHG),
I_O(PRECHG) = (K_(SET) × V_(PRECHG))/ R_SET
1 V < V_I(BAT) < V_(LOWV), t < t_(PRECHG)
22.5
ms
10
150 mA
225
250
275 mV
I_O(BAT)
R_PBAT
Battery charge current range ⁽⁴⁾
BAT to OUT pullup
V_{i (BAT)} > V_(LOWV), Mode = High
I_OUT(BAT) = (K_(SET) × V_(SET) / R_SET),
V_I(OUT) > V_O(OUT-REG) + V_(DO-MAX)
V_{i (BAT)}< 1 V
100
1000
1500 mA
1000
Ω
(1) V_(DPPM-SET) is scaled up by the scale factor for controlling the output voltage V_(DPPM-REG).
(2) V_DO(max), dropout voltage is a function of the FET, R_DS(on), and drain current. The dropout voltage increases proportionally to the
increase in current.
(3) All deglitch periods are a function of the timer setting and is modified in DPPM or thermal regulation modes by the percentages that the
program current is reduced.
(4) When input current remains below 2 A, the battery charging current may be raised until the thermal regulation limits the charge current.
4
Submit Documentation Feedback