BQ24030_07 Datasheet, PDF (5/38 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINY)

bq24030, bq24031, bq24032A
bq24035, bq24038
www.ti.com
SLUS618F – AUGUST 2004 – REVISED NOVEMBER 2006
ELECTRICAL CHARACTERISTICS (continued)
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
OUT PIN – FET (Q1, Q3, AND Q2) DROP-OUT VOLTAGE (RDSon)
V_(ACDO)
V_(USBDO) ⁽⁶⁾
V_(BATDO)
AC to OUT dropout voltage⁽⁵⁾
USB to OUT dropout voltage
BAT to OUT dropout voltage
(discharging)
V_I(AC)≥ V_CC(min), PSEL = High,
I_I(AC) = 1 A, (I_O(OUT)+ I_O(BAT)), or no AC
V_I(USB)≥ V_CC(min), PSEL = Low,
ISET2 = High, I_I(USB) = 0.4 A,
(I_O(OUT)+I_O(BAT)), or no AC
V_I(USB)≥ V_CC(min), PSEL = Low,
ISET2 = Low, I_I(USB) = 0.08 A,
(I_O(OUT)+ I_O(BAT))
V_{I (BAT)}≥ 3 V, I_i(BAT)= 1.0 A, V_CC < V_i(BAT)
300
475
140
180
mV
28
36
40
100 mV
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
R_SHVSB
USB 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
V_I(OUT) ≤ 1 V
10
mA
500
Ω
500
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⁽⁷⁾
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
230
250
270 mV
I_O(BAT)
R_PBAT
R_POUT
AC battery charge current range
(8)
BAT to OUT pullup
AC to OUT and USB to OUT
short-circuit pullup
V_{i (BAT)} > V_(LOWV), V_I(OUT) - V_{I (BAT)} >
V_(DO-MAX), PSEL = 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
V_I(OUT) < 1 V
100
1000
1500 mA
1000
Ω
500
V_(SET)
K_(SET)
Battery charge current set
voltage ⁽⁹⁾
Charge current set factor, BAT
Voltage on ISET1, V_VCC≥ 4.35 V,
V_I(OUT)- V_I(BAT) > V_(DO-MAX),
V_I(BAT) > V_(LOWV)
100 mA ≤ I_O(BAT) ≤ 1 A
10 mA ≤ I_O(BAT) ≤ 100 mA⁽¹⁰⁾
2.475
400
300
2.500
425
450
2.525
V
450
600
(5) 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.
(6) R_DS(on) of USB FET Q3 is calculated by: (V_USB – V_OUT) / (I_OUT + I_BAT) when I_I(USB) ≤ I_I(USB-MIN) (FET fully on, not in regulation).
(7) 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.
(8) When input current remains below 2 A, the battery charging current may be raised until the thermal regulation limits the charge current.
(9) For half-charge rate, V_(SET) is 1.25 V ± 25 mV for bq24032A/38 only.
(10) Specification is for monitoring charge current via the ISET1 pin during voltage regulation mode, not for a reduced fast-charge level.
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