LTC4007_15 Datasheet, PDF (24/24 Pages) Linear Technology – 4A, High Effi ciency, Standalone Li-Ion Battery Charger

LTC4007
TYPICAL APPLICATION
12.6V/4A Li-Ion Battery Charger
DCIN
0V TO 20V
3A
V_LOGIC
LOBAT
R10 R11 R12
100k 100k 100k ^*
3C4C
CHEM
LOBAT
DCIN
INFET
CLP
I_CL
I_CL LTC4007 CLN
ACP
ACP
TGATE
SHDN
FAULT
CHG
FLAG
SHDN
FAULT
CHG
FLAG
R9 32.4k 1%
NTC
BGATE
PGND
CSP
BAT
PROG
THERMISTOR
10k
NTC
C7
0.47μF
R_RT
309k
1%
R_T
ITH
GND
TIMING RESISTOR
(~2 HOURS)
Q3
INPUT SWITCH
C1
0.1μF
R1
4.99k
1%
C4
15nF
R_CL
0.033Ω
1%
C2
20μF
Q1
L1
R_SENSE
0.025Ω
10μH 4A _1%
Q2
D1
R4
3.01k 1%
R5 3.01k 1%
R7
6.04k
1%
C6
0.12μF
C5
0.0047μF
R_PROG
26.7k
1%
*PIN OPEN
D1: MBRS130T3
Q1: Si4431ADY
Q2: FDC645N
4007 TA02
SYSTEM
LOAD
BAT
C3
20μF
CHARGING
CURRENT
MONITOR
RELATED PARTS
PART NUMBER
LT^®1511
LT1513
LT1571
LTC1628-PG
LTC1709
LTC1729
LT1769
DESCRIPTION
Constant-Current/Constant-Voltage 3A Battery
Charger with Input Current Limiting
SEPIC Constant- or Programmable-Current/
Constant-Voltage Battery Charger
1.5A Switching Charger
2-Phase, Dual Synchronous Step-Down Controller
2-Phase, Dual Synchronous Step-Down Controller
with VID
2A Switching Battery Charger
LTC1778
LTC1960
Wide Operating Range, No R_SENSE Synchronous
Step-Down Controller
Dual Battery Charger/Selector with SPI Interface
LTC3711
No R_SENSE™ Synchronous Step-Down Controller
with VID
LTC4006
Small, High Efficiency, Fixed Voltage, Lithium-Ion
Battery Charger
LTC4008
High Efficiency, Programmable Voltage/Current
Battery Charger
No R_SENSE is a trademark of Linear Technology Corporation.
COMMENTS
High Efficiency Current Mode PWM with 4A Internal Switch
Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage;
Charges Any Number of Cells Up to 20V, 500kHz Switching Frequency
1- or 2-Cell Li-Ion, 500kHz or 200kHz Switching Frequency, Termination Flag
Minimizes C_IN and C_OUT, Power Good Output, 3.5V ≤ V_IN ≤ 36V
Up to 42A Output, Minimum C_IN and C_OUT, Uses Smallest Components for
Intel and AMD Processors
Constant-Current/Constant-Voltage Switching Regulator, Input Current
Limiting Maximizes Charge Current
2% to 90% Duty Cycle at 200kHz, Stable with Ceramic C_OUT
Simultaneous Charge or Discharge of Two Batteries, DAC Programmable
Current and Voltage, Input Current Limiting Maximizes Charge Current
3.5V ≤ V_IN ≤ 36V, 0.925V ≤ V_OUT ≤ 2V, for Transmeta, AMD and Intel
Mobile Processors
Constant-Current/Constant-Voltage Switching Regulator with Termination Timer,
AC Adapter Current Limit and Thermistor Sensor in a Small 16-Pin Package
Constant-Current/Constant-Voltage Switching Regulator, Resistor Voltage Current
Programming, AC Adapter Current Limit and Thermistor Sensor
24 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
4007fc
LT 0810 REV C • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2003