bq24030, bq24031, bq24032,
bq24032A, bq24035, bq24038, bq24039
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SLUS618C–AUGUST 2004–REVISED JUNE 2005
FUNCTIONAL DESCRIPTIONS
CHARGE CONTROL
The bqTINY-III supports a precision Li-ion or Li-polymer charging system suitable for single-cell portable devices.
See a typical charge profile, application circuit, and an operational flow chart in Figure 1 through Figure 4,
respectively.
Pre-Conditioning
Phase
Current Regulation Phase
Voltage Regulation and Charge Termination Phase
Regulation
Voltage
Regulation
Current
Charge
Voltage
Minimum
Charge
Charge
Complete
Voltage
Charge
Current
Pre−
Conditioning
and Term
Detect
UDG−04087
Figure 1. Charge Profile
bq24030/1/2/2A/5
AC Adapter
VDC
GND
4
AC
LDO
1
10 µF
10 µF
OUT 15
OUT 16
OUT 17
System
10 µF
D+
D −
VBUS
20 USB
14 TMR
Battery Pack
+
PACK+
10 µF
BAT
BAT
5
6
1 µF
R
TMR
7
ISET2
PACK−
2
STAT1
STAT2
USBPG
ACPG
GND
3
19
18
9
TEMP
USB Port
TS 12
13
DPPM
R
SET
ISET1 10
VSS 11
R
DPPM
CE
8
PSEL
Control and
Status Signals
UDG−04083
Figure 2. Typical Application Circuit
11
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