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参数资料
| 型号： | LT1512IS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHRGR CONST I/V 8-SOIC |
| 标准包装： | 100 |
| 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 ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
LT1512
SEPIC Constant-Current/
Constant-Voltage Battery Charger
FEATURES
DESCRIPTION
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Charger Input Voltage May Be Higher, Equal to or
Lower Than Battery Voltage
Charges Any Number of Cells Up to 30V*
1% Voltage Accuracy for Rechargeable Lithium
Batteries
500kHz Switching Frequency Minimizes
Inductor Size
100mV Current Sense Voltage for High Ef?ciency
Battery Can Be Directly Grounded
Charging Current Easily Programmable or Shut Down
The LT ? 1512 is a 500kHz current mode switching regulator
specially con?gured to create a constant-current/constant-
voltage battery charger. In addition to the usual voltage
feedback node, it has a current sense feedback circuit for
accurately controlling output current of a ?yback or SEPIC
(Single-Ended Primary Inductance Converter) topology
charger. These topologies allow the current sense circuit
to be ground referred and completely separated from the
battery itself, simplifying battery switching and system
grounding problems. In addition, these topologies allow
charging even when the input voltage is lower than the
Battery Charging of NiCd, NiMH, Lead-Acid or
Precision Current Limited Power Supply
Constant-Voltage/Constant-Current Supply
Transducer Excitation
APPLICATIONS
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Lithium Rechargeable Cells
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battery voltage.
Maximum switch current on the LT1512 is 1.5A. This allows
battery charging currents up to 1A for a single lithium-ion
cell. Accuracy of 1% in constant-voltage mode is perfect
for lithium battery applications. Charging current can be
easily programmed for all battery types.
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Maximum Input Voltage = 40V – V BAT
TYPICAL APPLICATION
Maximum Charging Current
WALL
ADAPTER
INPUT
CHARGE
+
C3
22μF
25V
V IN
?
L1 A*
V SW
C2** D1
2.2μF MBRS130LT3
0.5A
1.0
0.8
SINGLE
LITHIUM
CELL (4.1V)
SYNC
AND/OR
SHUTDOWN
S/S
LT1512
FB
L1 B*
?
R1
0.6
DOUBLE
LITHIUM
SHUTDOWN
GND GND S V C
C5
I FB
R4
24Ω
R2
+
C1
22μF
25V
0.4
6V BATTERY
CELL (8.2V)
0.1μF
R5
1k
C4
0.22μF
R3
0.2Ω
0.2
12V BATTERY
INDUCTOR = 33μH
* L1 A, L1 B ARE TWO 33mH WINDINGS ON A
0
0
5
10
15
20
25
SINGLE INDUCTOR: COILTRONICS CTX33-3
** TOKIN CERAMIC 1E225ZY5U-C203-F
Figure 1. SEPIC Charger with 0.5A Output Current
1512 F01
INPUT VOLTAGE (V)
1512 TA02
ACTUAL PROGRAMMED CHARGING CURRENT WILL BE INDEPENDENT OF INPUT
VOLTAGE AND BATTERY VOLTAGE IF IT DOES NOT EXCEED THE VALUES SHOWN.
THESE ARE ELECTRICAL LIMITATIONS BASED ON MAXIMUM SWITCH CURRENT.
PACKAGE THERMAL LIMITATIONS MAY REDUCE MAXIMUM CHARGING CURRENT.
SEE APPLICATIONS INFORMATION.
1512fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1513 | 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-1513-110-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1513-110-125 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
| LT-1513-151-012 | 制造商:Carling Technologies 功能描述:LT-SERIES TOGGLE SWITCH - Bulk |
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