Datasheet > LT1512

LT1512

更新时间： 2023-12-20 18:46:34

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
14页	205K
描述
SEPIC 恒定电流 / 恒定电压电池充电器

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LT1512 数据手册

LT1512

SEPIC Constant-Current/

Constant-Voltage Battery Charger

FeaTures

DescripTion

TheLT^®1512isa500kHzcurrentmodeswitchingregulator

speciallyconﬁguredtocreateaconstant-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 ﬂyback 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.

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 Efﬁciency

Battery Can Be Directly Grounded

Charging Current Easily Programmable or Shut Down

applicaTions

MaximumswitchcurrentontheLT1512is1.5A.Thisallows

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.

Battery Charging of NiCd, NiMH, Lead-Acid or

Lithium Rechargeable Cells

Precision Current Limited Power Supply

Constant-Voltage/Constant-Current Supply

Transducer Excitation

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

L1 A*

WALL

ADAPTER

INPUT

1.0

•

C2**

2.2µF

SINGLE

22µF

25V

MBRS130LT3

LITHIUM

0.8

0.6

0.4

0.2

CELL (4.1V)

0.5A

CHARGE

L1 B*

SYNC

LT1512

DOUBLE

LITHIUM

CELL (8.2V)

AND/OR

S/S

•

SHUTDOWN

GND GND S V

22µF

25V

24Ω

6V BATTERY

12V BATTERY

0.1µF

0.22µF

0.2Ω

INDUCTOR = 33µH

INPUT VOLTAGE (V)

*L1 A, L1 B ARE TWO 33µH WINDINGS ON A

SINGLE INDUCTOR: COILTRONICS CTX33-3

**TOKIN CERAMIC 1E225ZY5U-C203-F

1512 F01

1512 TA02

ACTUAL PROGRAMMED CHARGING CURRENT ꢀILL BE INDEPENDENT OF INPUT

VOLTAGE AND BATTERꢁ VOLTAGE IF IT DOES NOT EꢂCEED THE VALUES SHOꢀN.

THESE ARE ELECTRICAL LIMITATIONS BASED ON MAꢂIMUM SꢀITCH CURRENT.

PACKAGE THERMAL LIMITATIONS MAꢁ REDUCE MAꢂIMUM CHARGING CURRENT.

SEE APPLICATIONS INFORMATION.

Figure 1. SEPIC Charger with 0.5A Output Current

1512fc

For more information www.linear.com/LT1512

12 3 4 5 6 7...14

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与LT1512相关器件

型号	品牌	描述	获取价格	数据表
LT1512C	Linear	SEPIC Constant-Current/ Constant-Voltage Battery Charger	获取价格
LT1512CN8	Linear	SEPIC Constant-Current/ Constant-Voltage Battery Charger	获取价格
LT1512CN8#PBF	Linear	暂无描述	获取价格
LT1512CN8#TR	Linear	IC 2.7 A BATTERY CHARGE CONTROLLER, 580 kHz SWITCHING FREQ-MAX, PDIP8, 0.300 INCH, PLASTIC	获取价格
LT1512CS8	Linear	SEPIC Constant-Current/ Constant-Voltage Battery Charger	获取价格
LT1512CS8#TR	Linear	LT1512 - SEPIC Constant-Current/Constant-Voltage Battery Charger; Package: SO; Pins: 8; Te	获取价格

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