LTC4008 Linear Technology, LTC4008 Datasheet - Page 24

• Manufacturer Part Number: LTC4008
• Description: Multi-Chemistry Battery Charger
• Manufacturer: Linear Technology

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TYPICAL APPLICATIO
RELATED PARTS
PART NUMBER
LT
LT1513
LT1571
LTC1628-PG
LTC1709
Family
LTC1729
LT1769
LTC1778
LTC1960
LTC3711
LTC4006
LTC4007
LTC4100
No R
LTC4008
24
THERMISTOR
®
1511
SENSE
NTC
10k
0V TO 20V
is a trademark of Linear Technology Corporation.
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
V
FAULT
LOGIC
FLAG
DCIN
ACP
I
CL
DESCRIPTION
3A Constant-Current/Constant-Voltage Battery Charger
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
Li-Ion Battery Charger Termination Controller
2A Switching Battery Charger
Wide Operating Range, No R
Step-Down Controller
Dual Battery Charger/Selector with SPI Interface
No R
with VID
Small, High Efficiency, Fixed Voltage, Lithium-Ion
Battery Charger with Termination
High Efficiency, Programmable Voltage
Battery Charger with Termination
Smart Battery Charger Controller
C7
0.47µF
SENSE
R11
100k
●
0.25%
FAX: [phone]
RT
150k
Synchronous Step-Down Controller
13.3k
R12
100k
R9
R10 32.4k 1%
0.25%
147k
R8
R7
6.04k
1%
C6
0.12µF
U
SENSE
●
BATMON
V
I
ACP/SHDN
FAULT
FLAG
NTC
R
I
GND
www.linear.com
CL
TH
FB
T
TM
Synchronous
LTC4008
TGATE
BGATE
NiMH/4A Battery Charger
PGND
PROG
INFET
DCIN
CLP
CLN
CSP
BAT
C1
0.1µF
COMMENTS
High Efficiency, Minimum External Components to Fast Charge Lithium,
NIMH and NiCd Batteries
Charger Input Voltage May be Higher, Equal to or Lower Than Battery Voltage,
500kHz Switching Frequency
1- or 2-Cell Li-Ion, 500kHz or 200kHz Switching Frequency, Termination Flag
Minimizes C
Up to 42A Output, Minimum C
Intel and AMD Processors
Trickle Charge Preconditioning, Temperature Charge Qualification, Time or
Charge Current Termination, Automatic Charger and Battery Detection, and
Status Output
Constant-Current/Constant-Voltage Switching Regulator, Input Current
Limiting Maximizes Charge Current
2% to 90% Duty Cycle at 200kHz, Stable with Ceramic C
Simultaneous Charge or Discharge of Two Batteries, DAC Programmable
Current and Voltage, Input Current Limiting Maximizes Charge Current
3.5V ≤ V
Mobile Processors
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current Limit
and Thermistor Sensor, 16-Pin Narrow SSOP Package
Complete Charger for 3- or 4-Cell Li-Ion Batteries, AC Adapter Current Limit,
Thermistor Sensor and Indicator Outputs
SMBus Rev 1.1 Compliant
INPUT SWITCH
Q3
R4 3.01k 1%
IN
C5
0.0047µF
≤ 36V, 0.925V ≤ V
IN
26.7k
R1 4.99k 1%
1%
and C
R6
R5 3.01k 1%
C4
0.1µF
OUT
, Power Good Output, 3.5V ≤ V
Q1
Q2
R
0.02Ω
1%
4008 TA02
CL
OUT
20µF
D1: MBRS130T3
Q1: Si4431BDY
Q2: FDC645N
IN
C2
and C
≤ 2V, for Transmeta, AMD and Intel
D1
OUT
10µH
© LINEAR TECHNOLOGY CORPORATION 2003
L1
, Uses Smallest Components for
LT/LT 0805 REV A • PRINTED IN USA
R
0.025Ω
SYSTEM
LOAD
SENSE
1%
IN
OUT
≤ 36V
C3
20µF
CHARGING
CURRENT
MONITOR
NiMH
BATTERY
PACK
4008fa