C0098C0113C0050C0052C0055C0048C0050C0044 C0098C0113C0050C0052C0055C0048C0051


SLUS553D − MAY 2003 − REVISED JULY 2005
C0077C0085C0076C0084C0073C0067C0072C0069C0077C0073C0083C0084C0082C0089 C0066C0065C0084C0084C0069C0082C0089 C0067C0072C0065C0082C0071C0069C0082 C0067C0079C0078C0084C0082C0079C0076C0076C0069C0082
C0065C0078C0068 C0083C0089C0083C0084C0069C0077 C0080C0079C0087C0069C0082 C0083C0069C0076C0069C0067C0084C0079C0082
C0040C0054C0044C0054C0048 C0109C0109 C0120 C0055C0044C0057C0048 C0109C0109C0041
C0065C0099C0116C0117C0097C0108 C0083C0105C0122C0101
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FEATURES
C0068 Dynamic Power Management, DPM
Minimizes Battery Charge Time
C0068 Integrated Selector Supports Battery
Conditioning and Smart Battery Learn Cycle
C0068 Zero Volt Operation
C0068 Selector Feedback Circuit Ensures
Break-Before-Make Transition
C0068 ±0.4% Charge Voltage Accuracy, Suitable for
Charging Li-Ion Cells
C0068 ±4% Charge Current Accuracy
C0068 300-kHz Integrated PWM Controller for
High-Efficiency Buck Regulation
C0068 Depleted Battery Detection and Indication to
Protect Battery From Over Discharge
C0068 20-µA Sleep Mode Current for Low Battery
Drain
C0068 24-Pin TSSOP Package and 5 mm × 5 mm
QFN package (bq24703 only)
DESCRIPTION
The bq24702/bq24703 is a highly integrated battery
charge controller and selector tailored for notebook and
sub-notebook PC applications.
The bq24702/bq24703 uses dynamic power
management (DPM) to minimize battery charge time by
maximizing use of available wall-adapter power. This is
achieved by dynamically adjusting the battery charge
current based on the total system (adapter) current.
The bq24702/bq24703 uses a fixed frequency, pulse
width modulator (PWM) to accurately control battery
charge current and voltage. Charge current limits can
be programmed from a keyboard controller DAC or by
external resistor dividers from the precision 5-V, ±0.6%,
externally bypassed voltage reference (VREF),
supplied by the bq24702/bq24703.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
ACDET
ACPRES
ACSEL
BATDEP
SRSET
ACSET
VREF
ENABLE
BATSET
COMP
ACN
ACP
ACDRV
BATDRV
VCC
PWM
VHSP
ALARM
VS
GND
SRP
SRN
IBAT
BATP
bq24702, bq24703
PW PACKAGE
(TOP VIEW)
8
9
10
11
12
13
14
ACSEL
ACPRES
ACDET
ACDRV
BATDRV
NC
VCC
ACN
ACP
NC
NC
BATP
IBAT
NC
28
27
26
25
24
23
22
1 2 3 4 5 6 7
BA
TDEP
SRSET ACSET VREF ENABLE BA
TSET
COMP
PWM
VHSP
ALARM
VS
GND
SRP SRN
21 20 19 18 17 16 15
bq24703
RHD PACKAGE
(BOTTOM VIEW)
NC − No internal connection

Copyright  2003 − 2004, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
C0080C0082C0079C0068C0085C0067C0084C0073C0079C0078 C0068C0065C0084C0065 C0105C0110C0102C0111C0114C0109C0097C0116C0105C0111C0110 C0105C0115 C0099C0117C0114C0114C0101C0110C0116 C0097C0115 C0111C0102 C0112C0117C0098C0108C0105C0099C0097C0116C0105C0111C0110 C0100C0097C0116C0101C0046
C0080C0114C0111C0100C0117C0099C0116C0115 C0099C0111C0110C0102C0111C0114C0109 C0116C0111 C0115C0112C0101C0099C0105C0102C0105C0099C0097C0116C0105C0111C0110C0115 C0112C0101C0114 C0116C0104C0101 C0116C0101C0114C0109C0115 C0111C0102 C0084C0101C0120C0097C0115 C0073C0110C0115C0116C0114C0117C0109C0101C0110C0116C0115
C0115C0116C0097C0110C0100C0097C0114C0100 C0119C0097C0114C0114C0097C0110C0116C0121C0046 C0080C0114C0111C0100C0117C0099C0116C0105C0111C0110 C0112C0114C0111C0099C0101C0115C0115C0105C0110C0103 C0100C0111C0101C0115 C0110C0111C0116 C0110C0101C0099C0101C0115C0115C0097C0114C0105C0108C0121 C0105C0110C0099C0108C0117C0100C0101
C0116C0101C0115C0116C0105C0110C0103 C0111C0102 C0097C0108C0108 C0112C0097C0114C0097C0109C0101C0116C0101C0114C0115C0046