BQ24030 Datasheet, PDF (9/20 Pages) Texas Instruments – SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC (bqTINYI)

bq24030, bq24032, bq24035
www.ti.com
FUNCTIONAL DESCRIPTIONS
SLUS618 – AUGUST 2004
CHARGE CONTROL
The bqTINY-III supports a precision Li-Ion or Li-Pol 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
Minimum
Charge
Voltage
Pre−
Conditioning
and Taper
Detect
Charge
Voltage
Charge
Current
Figure 1. Charge Profile
Charge
Complete
UDG−04087
AC Adapter
VDC
GND
D+
D−
VBUS
GND
USB Port
bq24023RHL
4 AC
LDO 1
10 µF
10 µF
R_TMR
20 USB
14 TMR
7 ISET2
OUT 15
OUT 16
OUT 17
BAT 5
BAT 6
2 STAT1
3 STAT2
19 _USBPG
TS 12
18 _ACPG ^{DPPM 13}
9 _CE
8 _PSEL
ISET1 10
VSS 11
10 µF
10 µF
Battery Pack
PACK+
1 µF
+
PACK−
TEMP
R_SET
R_DPPM
Control and
Status Signals
Figure 2. Typical Application Circuit
System
UDG−04083
9