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| 型号： | LT1512IN8#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.7 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件页数： | 1/12页 |
| 文件大小： | 143K |
| 代理商： | LT1512IN8#TR |
LT1512
1
1512fa
TYPICAL APPLICATION
DESCRIPTION
SEPIC Constant-Current/
Constant-Voltage Battery Charger
The LT
1512 is a 500kHz current mode switching regulator
specially congured 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 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.
Maximum Charging Current
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
FEATURES
APPLICATIONS
n Battery Charging of NiCd, NiMH, Lead-Acid or
Lithium Rechargeable Cells
n Precision Current Limited Power Supply
n Constant-Voltage/Constant-Current Supply
n Transducer Excitation
*Maximum Input Voltage = 40V – VBAT
n Charger Input Voltage May Be Higher, Equal to or
Lower Than Battery Voltage
n Charges Any Number of Cells Up to 30V*
n 1% Voltage Accuracy for Rechargeable Lithium
Batteries
n 500kHz Switching Frequency Minimizes
Inductor Size
n 100mV Current Sense Voltage for High Efciency
n Battery Can Be Directly Grounded
n Charging Current Easily Programmable or Shut Down
Figure 1. SEPIC Charger with 0.5A Output Current
LT1512
IFB
VC
VIN
L1 A*
L1 B*
0.5A
GND GND S
FB
1512 F01
VSW
SYNC
AND/OR
SHUTDOWN
WALL
ADAPTER
INPUT
S/S
C3
22μF
25V
C2**
2.2μF
C5
0.1μF
*
**
L1 A, L1 B ARE TWO 33mH WINDINGS ON A
SINGLE INDUCTOR: COILTRONICS CTX33-3
TOKIN CERAMIC 1E225ZY5U-C203-F
C4
0.22μF
R4
24Ω
+
CHARGE
SHUTDOWN
R1
R2
R3
0.2Ω
R5
1k
C1
22μF
25V
+
D1
MBRS130LT3
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.
INPUT VOLTAGE (V)
0
CURRENT
(A)
0.6
0.8
1.0
20
1512 TA02
0.4
0.2
0
5
10
15
25
INDUCTOR = 33μH
DOUBLE
LITHIUM
CELL (8.2V)
6V BATTERY
12V BATTERY
SINGLE
LITHIUM
CELL (4.1V)
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| LT1512CN8#TRPBF | 2.7 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDIP8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1512IS8 | 功能描述:IC BATT CHRGR CONST I/V 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1512IS8#PBF | 功能描述:IC BATT CHRGR CONST I/V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LT1512IS8#TR | 功能描述:IC CHARGER BATT CONST V/I 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| LT1512IS8#TRPBF | 功能描述:IC BATT CHRGR CONST I/V 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
| 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 |
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