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参数资料
| 型号： | LTC4069EDC-4.4#TRMPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封装： | 2 X 2 MM, LEAD FREE, PLASTIC, MO-229WCCD-2, DFN-6 |
| 文件页数： | 1/16页 |
| 文件大小： | 192K |
| 代理商： | LTC4069EDC-4.4#TRMPBF |
1
LTC4069-4.4
406944f
DESCRIPTIO
U
■ Wireless PDAs
■
Cellular Phones
■
Portable Electronics
Standalone 750mA Li-Ion
Battery Charger in 2
× 2 DFN
with NTC Thermistor Input
■
Complete Linear Charger in 2mm
××××× 2mm DFN
Package
■
C/10 Charge Current Detection Output
■
Timer Charge Termination
■
Charge Current Programmable Up to 750mA with
5% Accuracy
■
No External MOSFET, Sense Resistor or Blocking
Diode Required
■
NTC Thermistor Input for Temperature Qualified
Charging
■
Preset 4.4V Float Voltage with 0.6% Accuracy
■
Constant-Current/Constant-Voltage Operation with
Thermal Feedback to Maximize Charge Rate
Without Risk of Overheating
■
Charge Current Monitor Output for Gas Gauging
■
Automatic Recharge
■ Charges Single-Cell Li-Ion Batteries Directly from
USB Port
■ 20
A Supply Current in Shutdown Mode
■ Soft-Start Limits Inrush Current
■ Tiny 6-Lead (2mm
× 2mm) DFN Package
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
The LTC
4069-4.4 is a complete constant-current/con-
stant-voltage linear charger for high capacity single-cell
lithium-ion batteries with a 4.4V float voltage. The 2mm
× 2mm DFN package and low external component count
make the LTC4069-4.4 especially well-suited for por-
table applications. Furthermore, LTC4069-4.4 is specifi-
cally designed to work within USB power specifications.
The CHRG pin indicates when charge current has dropped
to ten percent of its programmed value (C/10). An internal
timer terminates charging according to battery manufac-
turer specifications.
No external sense resistor or blocking diode is required due
to the internal MOSFET architecture. Thermal feedback regu-
lates charge current to limit the die temperature during high
power operation or high ambient temperature conditions.
When the input supply (wall adapter or USB supply) is
removed, the LTC4069-4.4 automatically enters a low cur-
rent state, dropping battery drain current to less than 1
A.
With power applied, LTC4069-4.4 can be put into shutdown
mode, reducing the supply current to less than 20
A.
The LTC4069-4.4 also includes automatic recharge, low-
battery charge conditioning (trickle charging), soft-start
(to limit inrush current) and an NTC thermistor input used
to monitor battery temperature.
The LTC4069-4.4 is available in a tiny 6-lead, low profile
(0.75mm) 2mm
× 2mm DFN package.
Standalone Li-Ion Battery Charger
+
VCC
R1
510
500mA
RPROG
2k
4069 TA01
4.4V
Li-Ion
BATTERY*
VIN
4.5V TO 5.5V
1
F
LTC4069-4.4
CHRG
NTC
BAT
PROG
GND
RNOM
100k
RNTC
100k
*E.G. SANYO BATTERIES: UF553436T OR UF553450T
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118, 6700364.
TIME (HOURS)
0
CHARGE
CURRENT
(mA)
150
450
500
550
1
2
3
4069 TA01b
50
350
250
100
400
0
300
200
BATTERY
VOLTAGE
(V)
3.7
4.3
4.4
4.5
3.5
4.1
3.9
3.6
4.2
3.4
4.0
3.8
0.5
1.5
4
5
2.5
3.5
4.5
CONSTANT-CURRENT
CONSTANT-
VOLTAGE
VCC = 5V
RPROG = 2K
CHARGE
TERMINATION
CHRG
TRANSITION
Complete Charge Cycle (1100mAh Battery)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4069EDC-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone 750mA Li-Ion Battery Charger in 2 × 2 DFN with NTC Thermistor Input |
| LTC4069EDC-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone 750mA Li-Ion Battery Charger in 2 × 2 DFN with NTC Thermistor Input |
| LTC4070 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:Ultralow Voltage Step-Up Converter and Power Manager |
| LTC4070EDDB | 制造商:LINER 制造商全称:Linear Technology 功能描述:Li-Ion/Polymer Shunt Battery Charger System |
| LTC4070EDDB#PBF | 制造商:Linear Technology 功能描述:Battery Charger Li-Ion/Li-Pol 50mA 4.2V 10-Pin DFN EP Bulk 制造商:Linear Technology 功能描述:IC BATTERY CHARGER 50mA DFN-8 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 50mA, DFN-8 制造商:Linear Technology 功能描述:IC, BATTERY CHARGER, 50mA, DFN-8; Battery Type:Li-Ion, Li-Polymer; Battery Charge Voltage:4.2V; Charge Current Max:50mA; Battery IC Case Style:DFN; No. of Pins:8; No. of Series Cells:1; Operating Temperature Min:-40C ;RoHS Compliant: Yes |
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