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参数资料
| 型号： | LT1571-5 |
| 厂商： | Linear Technology Corporation |
| 英文描述： | Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag |
| 中文描述： | 恒流/恒压电池充电器预置电压和终止旗 |
| 文件页数： | 1/16页 |
| 文件大小： | 201K |
| 代理商： | LT1571-5 |
1
LT1571 Series
Constant-Current/
Constant-Voltage Battery Charger
with Preset Voltage and Termination Flag
April 2000
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LT
1571 PWM battery charger is a simple, efficient
solution to fast-charge rechargeable batteries including
lithium-ion (Li-Ion), nickel-metal-hydride (NiMH) and
nickel-cadmium (NiCd) using constant-current and/or
constant-voltage control. The internal switch is capable
of delivering 1.5A DC current (2A peak current). The
onboard current sense resistor (0.1
) allows simple
charge current programming to within 5% accuracy
using a low cost external resistor. The constant-voltage
output can be selected for 4.1V or 4.2V per cell with 0.6%
accuracy.
LT1571 can charge batteries ranging from 1V to 20V. A
saturating switch operating at 200kHz (LT1571-1,
LT1571-2) or 500kHz (LT1571-5) gives high efficiency
and small charger size. A logic output (flag) indicates
Li-Ion near full charge when the charge current drops to
20% of the programmed value. The LT1571-1 and
LT1571-2 are in a 28-pin fused lead narrow SSOP power
package. The LT1571-5 is in a 16-pin fused lead narrow
SSOP power package.
I
Fast Charging of Li-Ion, NiMH and NiCd Batteries
I
Simple Charge Current Programming Requires Only
One Low Cost, 1/32W Resistor
I
High Efficiency Charger with Up to
1.5A Charge Current
I
Precision 0.6% Internal Voltage Reference
I
Preset Battery Voltages: 4.1V, 4.2V, 8.2V, 8.4V
I
500kHz or 200kHz Switching Frequency
Minimizes Charger Size
I
Low Reverse Battery Drain Current: 5
μ
A
I
Flag Indicates Li-Ion Charge Completion
I
5% Typical Charge Current Accuracy
I
Low Shutdown Current
I
LT1571-5: 500kHz, Fixed 4.1V or 4.2V
LT1571-1: 200kHz, Adjustable Voltage
LT1571-2: 200kHz, Fixed 8.2V or 8.4V
APPLICATIU
I
Cellular Phones, PDAs, Notebook Computers,
Portable Instruments
I
Cradle Chargers for Li-Ion, NiCd, NiMH and
Lead-Acid Rechargeable Batteries
Figure 1. Compact Li-Ion Cellular Phone Charger (0.8A)
SW
V
CC
PROG
6.19k
100k
V
IN
8.2V
TO 20V
CHARGE
COMPLETE
+
1571 F01
C1
0.22
μ
F
C
IN
*
10
μ
F
L1**
10
μ
H
LT1571-5
D1
MBRM120T3
D3
MBRM120T3
V
DD
D2
MMBD914L
SELECT
SENSE
GND
CAP
4.2V
Li-Ion
BATTERY
0.33
μ
F
0.1
μ
F
1k
1
μ
F
TOKIN OR MARCON CERAMIC SURFACE MOUNT
COILTRONICS TP3-100, 10
μ
H, 2.2mm HEIGHT (0.8A CHARGING CURRENT)
COILTRONICS TP1 SERIES, 10
μ
H, 1.8mm HEIGHT (<0.5A CHARGING CURRENT)
PANASONIC EEFCD1B220
***
*
**
BOOST
C
OUT
***
22
μ
F
+
V
C
BAT
BAT2
FLAG
300
Final Electrical Specifications
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
FEATURES
DESCRIPTIOU
TYPICAL APPLICATIO
U
相关PDF资料 |
PDF描述 |
|---|---|
| LT1571EGN-1 | Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag |
| LT1571EGN-2 | Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag |
| LT1571EGN-5 | Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag |
| LT1571-1 | CAP 47UF 4V ELECT HB SMD |
| LT1571-2 | Constant-Current/ Constant-Voltage Battery Charger with Preset Voltage and Termination Flag |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT-1571-511-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1571-514-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1571-531-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1571-533-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1571-611-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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