LTC4009-2_15 Datasheet, PDF (28/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger

LTC4009
LTC4009-1/LTC4009-2
Typical Application
12.6V 2 Amp Charger
FROM
ADAPTER
15V AT 2A
BULK
CHARGE
D2
R7
50mΩ
C1
R1
0.1µF
3k
D1
R2
22.1k
R3
2.43k
TO/FROM
MCU
R8
CHRG
3
DCIN
5 _DCDIV
C4
0.1µF
2
CLP
1
CLN
BOOST
20
R15 0Ω*
R8
5.1k
C5
19
TGATE
0.1µF
LTC4009 ₁₈
D3
SW
7
ACP
INTV_DD ¹⁷
4
ICL
6
16
BGATE
C6
SHDN
21
2µF
GND
12
ITH
C2
15
CSP
R9 3.01k
R5
26.7k
0.1µF
R4
6.04k
13
PROG
C3
4.7nF
14
CSN
11
BAT ₉
FBDIV
10
V_FB
R10 3.01k
R12
C10
294k
10pF
Q1
R6
53.6k
R13
31.2k
POWER TO SYSTEM
D5
C8
10µF
Q2
D4
Q3
L1
10µH
OR
R14
100k
D6
18V
ZENER
Q4
PFET
FDR858P
TO POWER SYSTEM LOAD
WHEN ADAPTER IS NOT
PRESENT, USE
SCHOTTKY DIODE D5 OR
THE COMBINATION OF R14,
D6 AND Q4
R11
50mΩ
C9 +
10µF
12.6V
Li-Ion
BATTERY
4009 TA02
D2, D4: MBR230LSFT1
D3:CMDSH-3
Q1: 2N7002
Q2, Q3: Si7212DN OR SiA914DJ
OR Si4816BDY (OMIT D4)
L1: IHLP-2525CZER100M11
*SEE TGATE BOOST SUPPLY
IN APPLICATIONS INFORMATION
Related Parts
PART NUMBER
LTC4006
LTC4007/LTC4007-1
DESCRIPTION
Small, High Efficiency, Fixed Voltage, Lithium-Ion
Battery Chargers with Termination
High Efficiency, Programmable Voltage, Lithium-Ion
Battery Charger with Termination
COMMENTS
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current
Limit and Thermistor Sensor, 16-Pin SSOP Package
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current
Limit, Thermistor Sensor and Indicator Outputs
LTC4008/LTC4008-1 High Efficiency, Programmable Voltage/Current Battery Constant-Current/Constant-Voltage Switching Regulator, Resistor
Chargers
Voltage/Current Programming, Thermistor Sensor and Indicator
Outputs, AC Adapter Current Limit (Omitted on 4008-1)
LTC4012/LTC4012-1 High Efficiency, Multichemistry Battery Chargers with
LTC4012-2
PowerPath Control
LTC4411
2.6A Low Loss Ideal Diode
LTC4412/LTC4412HV Low Loss PowerPath Controllers
Constant-Current/Constant-Voltage Switching Regulator in a 20-Lead
QFN Package, AC Adapter Current Limit, PFET Input Ideal Diode Control,
Indicator Outputs
No External MOSFET, Automatic Switching Between DC Sources, 140mΩ
On-Resistance in ThinSOT^TM package
Very Low Loss Replacement for Power Supply ORing Diodes Using
Minimal External Complements, Operates Up to 28V (36V for HV)
LTC4413
Dual 2.6A, 2.5V to 5.5V Ideal Diodes
Low Loss Replacement for ORing Diodes, 100mΩ On-Resistance
LTC4414
36V, Low Loss PowerPath Controller for Large PFETs Low Loss Replacement for ORing Diodes, Operates Up to 36V
LTC4416
Dual Low Loss PowerPath Controllers
Low Loss Replacement for ORing Diodes, Operates Up to 36V, Drives
Large PFETs, Programmable, Autonomous Switching
4009fd
28 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
LT 0610 REV D • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2008