Datasheet > LT1513%20LT1513-2

LT1513%20LT1513-2

更新时间： 2022-01-18 22:16:00

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凌特 - Linear		/
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16页	303K
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LT1513/LT1513-2

SEPIC Constant- or

Programmable-Current/

Constant-Voltage Battery Charger

DESCRIPTION

FEATURES

The LT^®1513 is a 500kHz current mode switching regula-

tor specially configured to create a constant- or program-

mable-current/constant-voltagebatterycharger.Inaddition

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

currentsensecircuittobegroundreferredandcompletely

separatedfromthebatteryitself,simplifyingbatteryswitch-

ing and system grounding problems. In addition, these

topologies allow charging even when the input voltage is

lower than the battery voltage. The LT1513 can also drive

a CCFL Royer converter with high efficiency in floating or

grounded mode.

■

Charger Input Voltage May Be Higher, Equal to or

Lower Than Battery Voltage

■

Charges Any Number of Cells Up to 20V

1% Voltage Accuracy for Rechargeable Lithium

Batteries

■

100mV Current Sense Voltage for High Efficiency

(LT1513)

0mV Current Sense Voltage for Easy Current

Programming (LT1513-2)

Battery Can Be Directly Grounded

500kHz Switching Frequency Minimizes

Inductor Size

■

^{Charging Curren}U^{t Easily Programmable or Shut Down}

APPLICATIONS

Maximum switch current on the LT1513 is 3A. This allows

battery charging currents up to 2A 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.

■

Charging of NiCd, NiMH, Lead-Acid or Lithium

Rechargeable Cells

■

Precision Current Limited Power Supply

■

Constant-Voltage/Constant-Current Supply

Transducer Excitation

Universal Input CCFL Driver

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

■

TYPICAL APPLICATION

Maximum Charging Current

L1A*

WALL

ADAPTER

INPUT

•

2.4

C2**

22µF

25V

†

4.7µF

2.2

SINGLE Li-Ion CELL

(4.1V)

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

1.25A

CHARGE

DOUBLE Li-Ion

CELL (8.2V)

L1B*

LT1513

SYNC

•

S/S

GND

AND/OR

SHUTDOWN

12V

39Ω

22µF

25V

× 2

TAB

16V

270Ω

20V

0.1µF

0.22µF

0.08Ω

BATTERY

VOLTAGE

LT1513 • TA01

L1A, L1B ARE TWO 10µH WINDINGS ON A

COMMON CORE: COILTRONICS CTX10-4

CERAMIC MARCON THCR40EIE475Z OR TOKIN 1E475ZY5U-C304

MBRD340 OR MBRS340T3. MBRD340 HAS 5µA TYPICAL

LEAKAGE, MBRS340T3 50µA TYPICAL

INPUT VOLTAGE (V)

†

INDUCTOR = 10µH

ACTUAL PROGRAMMED CHARGING CURRENT WILL BE

INDEPENDENT OF INPUT VOLTAGE IF IT DOES NOT

EXCEED VALUES SHOWN

LT1513 • TA02

Figure 1. SEPIC Charger with 1.25A Output Current

12 3 4 5 6 7...16

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与LT1513%20LT1513-2相关器件

型号	品牌	描述	获取价格	数据表
LT1513_15	Linear	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格
LT1513-2	Linear	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格
LT1513-2_15	Linear	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格
LT1513-2CR	Linear Systems	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格
LT1513-2CT7	LINEAR_DIMENSIONS	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格
LT1513-2IR	Linear Systems	SEPIC Constant- or Programmable-Current/ Constant-Voltage Battery Charger	获取价格

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