bq24030, bq24031, bq24032,
bq24032A, bq24035, bq24038, bq24039
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SLUS618C–AUGUST 2004–REVISED JUNE 2005
ELECTRICAL CHARACTERISTICS (continued)
over junction temperature range (0°C ≤ TJ ≤ 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
I(AC)≥ VCC(min), PSEL=High,
V(ACDO)
V(USBDO)
V(BATDO)
AC to OUT dropout voltage(5)
300
140
475
180
II(AC) = 1 A, (IO(OUT)+ IO(BAT)
)
V
I(USB)≥ VCC(min), PSEL = Low, or no AC
(bq24039), ISET2 = High
II(USB) = 0.4 A, (IO(OUT)+IO(BAT)
mV
)
V
I(USB)≥ VCC(min), PSEL = Low, or no AC
(bq24039), ISET2 = Low
II(USB) = 0.08 A, (IO(OUT)+ IO(BAT)
(6)
USB to OUT dropout voltage
28
36
)
VI(USB)≥ VCC(min), ISET2 = ISET3 = HIGH,
II(USB) = 0.9 A (IO(OUT)+ IO(BAT)),
bq24039 only
315
40
405
100
mV
mV
BAT to OUT dropout voltage
(discharging)
VI (BAT)≥ 3 V, Ii(BAT)= 1.0 A, VCC < Vi(BAT)
OUT PIN - BATTERY SUPPLEMENT MODE
Enter battery supplement mode
VI(OUT)
≤ VI(BAT)
– 60 mV
VBSUP1
(battery supplements OUT current VI(BAT)> 2 V
in the presence of input source
V
VI(OUT)
≥ VI(BAT)
– 20 mV
VBSUP2
Exit battery supplement mode
VI(BAT)> 2 V
OUT PIN - SHORT CIRCUIT
Current source between BAT to OUT for
IOSH1
BAT to OUT short-circuit recovery short-circuit recovery to
10
mA
V
V
V
I(OUT)≤ VI(BAT) –200 mV
RSHAC
AC to OUT short-circuit limit
USB to OUT short-circuit limit
I(OUT) ≤ 1 V
500
500
Ω
RSHVSB
I(OUT) ≤ 1 V
BAT PIN CHARGING – PRECHARGE
Precharge to fast-charge transition
V(LOWV)
TDGL(F)
IO(PRECHG)
V(PRECHG)
Voltage on BAT
2.9
3
3.1
V
threshold
Deglitch time for fast-charge to
precharge transition(7)
tFALL = 100 ns, 10 mV overdrive,
VI(BAT) decreasing below threshold
22.5
ms
1 V < VI(BAT) < V(LOWV), t < t(PRECHG)
IO(PRECHG) = (K(SET) × V(PRECHG))/ RSET
,
Precharge range
10
150
270
mA
mV
Precharge set voltage
1 V < VI(BAT) < V(LOWV), t < t(PRECHG)
230
250
BAT PIN CHARGING - CURRENT REGULATION
Vi (BAT) > V(LOWV), VI(OUT) - VI (BAT)
V(DO-MAX), PSEL = High
IOUT(BAT) = (K(SET) × V(SET) / RSET),
>
AC battery charge current range
IO(BAT)
100
1000
1500
mA
(8)(9)
VI(OUT) > VO(OUT-REG) + V(DO-MAX)
AC to OUT and USB to OUT
short-circuit pullup
RPOUT
VI(OUT) < 1 V
500
Ω
Voltage on ISET1, VVCC≥ 4.35 V,
VI(OUT)- VI(BAT) > V(DO-MAX), VI(BAT)
V(LOWV)
Battery charge current set volt-
age(10)
V(SET)
>
2.475
2.500
2.525
V
100 mA ≤ IO(BAT) ≤ 1 A
400
300
425
450
450
600
K(SET)
Charge current set factor, BAT
10 mA ≤ IO(BAT) ≤ 100 mA(11)
(5) VDO(max), dropout voltage is a function of the FET, RDS(on), and drain current. The dropout voltage increases proportionally to the
increase in current.
(6) RDS(on) of USB FET Q3 is calculated by: (VUSB – VOUT) / (IOUT + IBAT) when II(USB) ≤ II(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) When PSEL is pulled low, and USBPG is high, the AC input functions as a USB input for bq24039.
(10) For half-charge rate, V(SET) is 1.25 V ± 25 mV for bq24032/32A only.
(11) Specification is for monitoring charge current via the ISET1 pin during voltage regulation mode, not for a reduced fast-charge level.
5
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