Datasheet > LT1510-5_15

LT1510-5_15

更新时间： 2024-11-06 01:16:23

品牌	Logo	应用领域
凌特 - Linear		电池
页数	文件大小	规格书
16页	295K
描述
Constant-Voltage/ Constant-Current Battery Charger

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LT1510-5_15 数据手册

LT1510/LT1510-5

Constant-Voltage/

Constant-Current Battery Charger

FEATURES

■

plest, most efficient solution to fast-charge modern re-

chargeablebatteriesincludinglithium-ion(Li-Ion), nickel-

metal-hydride (NiMH)* and nickel-cadmium (NiCd)* that

require constant-current and/or constant-voltage charg-

ing. The internal switch is capable of delivering 1.5A DC

current (2A peak current). The 0.1Ω onboard current

sense resistor makes the charging current programming

very simple. One resistor (or a programming current from

a DAC) is required to set the full charging current (1.5A) to

within 5% accuracy. The LT1510 with 0.5% reference

voltageaccuracymeetsthecriticalconstant-voltagecharg-

ing requirement for lithium cells.

Charges NiCd, NiMH and Lithium-Ion Batteries ––

Only One ¹/₁₀W Resistor Is Needed to Program

Charging Current

■

High Efficiency Current Mode PWM with 1.5A

Internal Switch and Sense Resistor

■

3% Typical Charging Current Accuracy

■

Precision 0.5% Voltage Reference for Voltage

Mode Charging or Overvoltage Protection

■

Current Sensing Can Be at Either Terminal of

the Battery

■

Low Reverse Battery Drain Current: 3µA

■

Charging Current Soft Start

Shutdown Control

500kHz Version Uses Small Inductor

■

The LT1510 can charge batteries ranging from 2V to 20V.

Groundsensingofcurrentisnotrequiredandthebattery’s

negative terminal can be tied directly to ground. A saturat-

ingswitchrunningat200kHz(500kHzforLT1510-5)gives

high charging efficiency and small inductor size. A block-

ing diode is not required between the chip and the battery

becausethechipgoesintosleepmodeanddrainsonly3µA

when the wall adaptor is unplugged. Soft start and shutdown

featuresarealsoprovided.TheLT1510isavailableina16-pin

fused lead power SO package with a thermal resistance of

50°C/W, an 8-pin SO and a 16-pin PDIP.

■

APPLICATIONS

■

Chargers for NiCd, NiMH and Lithium Batteries

Step-Down Switching Regulator with Precision

Adjustable Current Limit

■

DESCRIPTION

Withswitchingfrequencyashighas500kHz,TheLT^®1510

current mode PWM battery charger is the smallest, sim-

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

* NiCd and NiMH batteries require charge termination circuitry (not shown in Figure 1).

TYPICAL APPLICATIONS

1N5819

11V TO 28V

0.22µF

1N5819

MBRM120T3

8.2V TO 20V

MBRM120T3

–

10µF

–

10µF

BOOST

PROG

1µF

BOOST

PROG

L1**

33µH

300Ω

3.83k

1µF

LT1510

L1**

10µH

300Ω

1N914

6.19k

LT1510-5

MMBD914L

GND

0.1µF

GND

0.1µF

OVP

SENSE

BAT

SENSE

BAT

OUT

4.2V

22µF

†

OUT

22µF

***

4.2V

TANT

†

VN2222

4.2V

2N7002

240k

70.6k

NOTE: COMPLETE LITHIUM-ION CHARGER, NO TERMINATION REQUIRED

* TOKIN OR MARCON CERAMIC SURFACE MOUNT

** COILTRONICS TP3-100, 10µH, 2.2mm HEIGHT (0.8A CHARGING CURRENT)

COILTRONICS TP1 SERIES, 10µH, 1.8mm HEIGHT (<0.5A CHARGING CURRENT)

0.25%

NOTE: COMPLETE LITHIUM-ION CHARGER, NO TERMINATION REQUIRED

TOKIN OR MARCON CERAMIC SURFACE MOUNT

100k

0.25%

100k

0.25%

***

PANASONIC EEFCD1B220

1510 F02

** COILTRONICS CTX33-2

OPTIONAL, SEE APPLICATIONS INFORMATION

†

1510 F01

†

OPTIONAL, SEE APPLICATIONS INFORMATION

Figure 1. 500kHz Smallest Li-Ion Cell Phone Charger (0.8A)

Figure 2. Charging Lithium Batteries (Efficiency at 1.3A > 87%)

12 3 4 5 6 7...16

中文翻译

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