BQ2954 Datasheet, PDF (5/18 Pages) Texas Instruments – Lithium Ion Charge Management IC with Integrated Switching Controller

bq2954
8-24VDC ±10%
VDC
D4
B130DI
C10
47uF
25V
Q1
FMMT3906
R4
10K
R2
4.7K
Q2
R1
FMMt3904
1K
Q5
FZT789A
L2
47uH
D5
B130DI
U2
ZMR500
IN
G
N
OUT
D
C3
1uF
25V
5V
R5
10K
C2
1uF
Q3
FMMT451
D1
1N4148
L1
10 uH
5V
R14
RB1
R6
R9
10K
220
R15
RB2
D2
C6
GRREN
0.1 uF
R13
1K
D3
RED
R3
10K
Q4
FMMT3904
R10
62K
C4
0.1 uF
U1
16
15
14
13
12
11
10
9
LED2/DSEL
LED1/CSEL
MOD
VCC
VSS
LCOM
BTST
TPWM
bq2954
C9
470pF
C8
1000pF
R7
1K
TM
CHG
BAT
VCOMP
ICOMP
ITERM
SNS
TS
1
2
3
4
5
6
7
8
C5
0.1uF
C7
0.01uF
C1
0.1uF
R8
0.25 5%
0.5W
5V
R11
4.32K
1%
R12
8.45K
1%
BAT+
C11
10uF
20V
PCS4106
BAT-
TEM+
1. I_MAX = 1.0A, Vreg = 4.2V ± 1% PER CELL
2. MTO = 3 HRS, I_FULL = I_MAX/5, I_TERM = I_MAX/10
3. TEMP = 0-45˚C,
4. Frequency = 200kHz
2954sch9/23/98
Figure 3. High-Efficiency Li-Ion Charger for 1–4 Cells
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