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| 型号： | LT1513IR#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR CONST/PROG I/V 7DD |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 所有电池类型 |
| 电源电压： | 2.7 V ~ 25 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-263-8，D²Pak（7 引线+接片），TO-263CA |
| 供应商设备封装： | D2PAK-7 |
| 包装： | 管件 |
| 产品目录页面： | 1340 (CN2011-ZH PDF) |
LT1513/LT1513-2
TYPICAL APPLICATIO N S
I CHARGE = R 5
Lithium-Ion Battery Charger with
Switchable Charge Current
Many battery chemistries require several constant-current
settings during the charging cycle. The circuit shown in
Figure 8 uses the LT1513-2 to provide switchable 1.35A and
0.13A constant-current modes. The circuit is based on a
standard SEPIC battery charger circuit set to a single
lithium-ion cell charge voltage of 4.1V. The LT1513-2 has I FB
referenced to ground allowing a simple resistor network to
set the charging current values. In constant-current mode,
the I FB error amplifier drives the FB pin, increasing charging
current, until I R4 is balanced by I R5 .
(I )(R 4) – I FBVOS
R 3
There are several ways to control I R5 including DAC, PWM or
resistor network as shown here. If the lithium cell requires
precharging, Q1 is turned on, setting a constant current of
0.13A. When charge voltage is reached, Q1 is turned off,
programming the full charge current of 1.35A. As the cell
voltage approaches 4.1V, the voltage sensing network (R1,
R2) starts driving the V FB pin, changing the LT1513-2 to
constant-voltage mode. As charging current falls, the output
remains in constant-voltage mode for the remainder of the
charging cycle. When charging is complete, the LT1513-2
can be shut down with the S/S pin.
V IN
CHARGE
SHUTDOWN
3.3V
R6
10k
+
C3
25 μ F
25V
R3
330 ?
7
6
1
V IN
S/S
V C
L1A
CTX10-4
?
LT1513-2
GND
4
V SW
V FB
I FB
5
2
3
C2
4.7 μ F
R4
4.7k
?
D1
MBRS330T3
L1B
R1
78.7k
0.5%
+
Li-Ion
RECHARGABLE
CELL
C1
22 μ F
25V
× 2
PRECHARGE
R7
910 ?
Q1
C5
0.1 μ F
R5
36k
C4
0.22 μ F
R3
0.25 ?
R2
34k
0.5%
CHARGE
Figure 8. Lithium-Ion Battery Charger
GND
1513 F08
sn1513 1513fas
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1513IT7 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Battery Management |
| LT1513IT7-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger |
| LT-1514-110-006 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1514-110-012 | 制造商:Carling Technologies 功能描述:SINGLE-POLE, LIGHTED TOGGLE, RED LENS - Bulk |
| LT-1514-110-024 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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