BQ25015 Datasheet, PDF (8/28 Pages) Texas Instruments – SINGLE-CHIP CHARGER AND DC/DC CONVERTER IC FOR PORTABLE APPLICATIONS

bq25015
bq25017
SLUS721A – DECEMBER 2006 – REVISED MARCH 2007
DEVICE INFORMATION
bq25015, bq25017
RHL PACKAGE
(TOP VIEW)
www.ti.com
FB
VSS
EN
AC
USB
STAT1
STAT2
VSS
21
3
4
5
6
7
8
9 ¹⁰
20 ¹⁹
18
17
16
15
14
13
11 ₁₂
SW
VSS
BAT/OUT
BAT/OUT
CE
PG
ISET2
ISET1
TERMINAL
NAME
NO.
AC
5
BAT/OUT
16
BAT/OUT
17
CE
15
EN
4
FB
2
FPWM
ISET1
ISET2
NC
PG
STAT1
STAT2
SW
USB
20
12
13
1, 10, 11
14
7
8
19
6
VSS
3, 9, 18
TERMINAL FUNCTIONS
I/O
DESCRIPTION
I Charge input voltage from AC adapter, connect 10 µF capacitor to ground
I/O Charge current output
I Battery input to DC-DC converter
I Charge enable input (active low)
I Enable input for DC-DC converter; EN=HIGH for device enable
I
Feedback pin for DC-DC converter; connect to voltage divider for bq25015,
or connect to system OUT voltage for bq25017
I
PWM control input for the DC-DC converter. A high on FPWM = forced PWM mode. A low = power save
mode.
I Charge current set point for AC input and precharge and taper set point for both AC and USB
I Charge current set point for USB port (High = 500 mA, Low = 100 mA, High-Z = disable USB charge)
– No connect. These pins must be left floating.
O Power good status output (active low, open-drain)
O Charge status output 1 (open-drain)
O Charge status output 2 (open-drain)
O Phase node of the DC/DC converter; connect series inductor and capacitor to ground
I Charge input voltage from USB adapter; connect to 10 µF capacitor to ground
Ground Input. Also note that there is an internal electrical connection between the exposed thermal pad
–
and VSS pins of the device. The exposed thermal pad must be connected to the same potential as the
Vss pin on the printed circuit board. Do not use the thermal pad as the primary ground input for the
device. All VSS pins must be connected to ground at all times.
8
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