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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
OUT PIN – FET (Q1, Q3, AND Q2) DROP-OUT VOLTAGE (RDSon)
V
(ACDO)
AC to OUT dropout voltage
(5)
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
TEST CONDITIONS
MIN
TYP
MAX
UNIT
140
180
mV
V
(USBDO)
(6)
USB to OUT dropout voltage
28
36
V
(BATDO)
BAT to OUT dropout voltage
(discharging)
40
100
mV
OUT PIN - BATTERY SUPPLEMENT MODE
V
BSUP1
Enter battery supplement mode
(battery supplements OUT current
in the presence of input source
Exit battery supplement mode
V
I(BAT)
> 2 V
V
I(OUT)
≤
V
I(BAT)
– 60 mV
V
I(OUT)
≥
V
I(BAT)
– 20 mV
V
V
BSUP2
V
I(BAT)
> 2 V
OUT PIN - SHORT CIRCUIT
I
OSH1
R
SHAC
R
SHVSB
BAT to OUT short-circuit recovery
AC to OUT short-circuit limit
USB to OUT short-circuit limit
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
500
500
mA
Ω
BAT PIN CHARGING – PRECHARGE
V
(LOWV)
T
DGL(F)
I
O(PRECHG)
V
(PRECHG)
Precharge to fast-charge transition
Voltage on BAT
threshold
Deglitch time for fast-charge to
precharge transition
(7)
Precharge range
Precharge set voltage
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)
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
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
10
230
250
2.9
3
22.5
150
270
3.1
V
ms
mA
mV
BAT PIN CHARGING - CURRENT REGULATION
AC battery charge current range
(8)
I
O(BAT)
R
PBAT
R
POUT
V
(SET)
100
1000
1500
mA
BAT to OUT pullup
AC to OUT and USB to OUT
short-circuit pullup
Battery charge current set
voltage
(9)
Charge current set factor, BAT
1000
500
Ω
2.500
425
450
2.525
450
600
V
K
(SET)
(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.
5
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