LTC4012-2 Linear Technology Corporation, LTC4012-2 Datasheet - Page 26

• Manufacturer Part Number: LTC4012-2
• Description: Multi-Chemistry Battery Charger
• Manufacturer: Linear Technology Corporation

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LTC4012/
LTC4012-1/LTC4012-2
TYPICAL APPLICATION
26
15V AT 4A
ADAPTER
FROM
CHARGE
BULK
C1
0.1μF
Q1
R5
26.7k
TO/FROM
D1
R6
53.6k
MCU
R1
3k
R4
6.04k
C2
0.1μF
C3
4.7nF
R
12
13
7
4
5
8
6
CHRG
DCIN
ACP
ICL
SHDN
ITH
PROG
LTC4012
INTV
BOOST
BGATE
TGATE
FBDIV
INFET
GND
CLN
CSP
CSN
CLP
BAT
V
SW
DD
FB
20
19
18
17
16
21
15
14
11
10
3
2
1
9
12.6V 4 Amp Charger
R15
0Ω*
Q5
R12
294k
R13
31.2k
0.1μF
D3
C4
C6
2μF
R10 3.01k
R9 3.01k
C5
0.1μF
25mΩ
5.1k
C10
10pF
R7
R8
Q2
Q3
C9
10μF
D4
C8
10μF
+
R11
25mΩ
L1
4.7μH
4012 TA03
12.6V
Li-Ion
BATTERY
D5
THE COMBINATION OF R14,
TO POWER SYSTEM LOAD
OR
SCHOTTKY DIODE D5 OR
POWER TO SYSTEM
WHEN ADAPTER IS NOT
D3: CMDSH-3
D4: MBR230LSFT1
Q1: 2N7002
Q2, Q3: Si7212DN OR SiA914DJ
Q4, Q5: Si7423DN
L1: 1HLP-2525CZER4R7M11
PRESENT, USE
*: SEE TGATE BOOST SUPPLY IN
100k
D6 AND Q4
R14
APPLICATIONS INFORMATION
OR Si4816BDY (OMIT D4)
D6
18V
ZENER
Q4
4012f