LT1510CS8PBF Linear Technology Corporation, LT1510CS8PBF Datasheet

LT1510CS8PBF

Manufacturer Part Number

LT1510CS8PBF

Description

SOP-8

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1510CS8PBF.pdf (16 pages)

2.LT1510CS8PBF.pdf (16 pages)

Specifications of LT1510CS8PBF

Date_code

05+

Current page: 1 of 16
Download datasheet (291Kb)

DESCRIPTION

FEATURES

With switching frequency as high as 500kHz, The LT

current mode PWM battery charger is the smallest, sim-

TYPICAL APPLICATIONS

APPLICATIONS

***

NOTE: COMPLETE LITHIUM-ION CHARGER, NO TERMINATION REQUIRED

†

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

TOKIN OR MARCON CERAMIC SURFACE MOUNT

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

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

PANASONIC EEFCD1B220

OPTIONAL, SEE APPLICATIONS INFORMATION

Charges NiCd, NiMH and Lithium-Ion Batteries ––

Only One

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: 3 A

Charging Current Soft Start

Shutdown Control

500kHz Version Uses Small Inductor

Chargers for NiCd, NiMH and Lithium Batteries

Step-Down Switching Regulator with Precision

Adjustable Current Limit

L1**

10 H

0.22 F

MMBD914L

MBRM120T3

W Resistor Is Needed to Program

OVP

BOOST

GND

SENSE

LT1510-5

PROG

BAT

0.1 F

1 F

22 F

10 F

OUT ***

300

MBRM120T3

4.2V

Constant-Current Battery Charger

6.19k

70.6k

0.25%

100k

0.25%

2N7002

8.2V TO 20V

†

1510

1510 F01

+ –

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

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

chargeable batteries including lithium-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 0.1

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

voltage accuracy meets the critical constant-voltage charg-

ing requirement for lithium cells.

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

Ground sensing of current is not required and the battery’s

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

ing switch running at 200kHz (500kHz for LT1510-5) gives

high charging efficiency and small inductor size. A block-

ing diode is not required between the chip and the battery

because the chip goes into sleep mode and drains only 3 A

when the wall adaptor is unplugged. Soft start and shutdown

features are also provided. The LT1510 is available in a 16-pin

fused lead power SO package with a thermal resistance of

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

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

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

NOTE: COMPLETE LITHIUM-ION CHARGER, NO TERMINATION REQUIRED

** COILTRONICS CTX33-2

L1**

33 H

* TOKIN OR MARCON CERAMIC SURFACE MOUNT

†

OPTIONAL, SEE APPLICATIONS INFORMATION

0.22 F

1N914

1N5819

Constant-Voltage/

OVP

BOOST

GND

SENSE

LT1510

PROG

BAT

LT1510/LT1510-5

0.1 F

1 F

10 F

22 F

TANT

OUT

300

1N5819

4.2V

onboard current

3.83k

240k

0.25%

100k

0.25%

VN2222

11V TO 28V

†

1510 F02

+ –

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