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LT1513-2IR#PBF

ADILT1513-2IR#PBF

Analog Devices Inc.
Charger IC Multi-Chemistry DDPAK-7
NRND429 in stock

Overview

The LT1513-2IR#PBF is a 500kHz current mode switching regulator configured as a SEPIC (Single-Ended Primary Inductance Converter) specifically for battery charging. This topology allows the input voltage to be higher, lower, or equal to the battery voltage, making it ideal for charging from various power sources.

Why Choose This Part

The 500kHz switching frequency enables the use of small surface-mount inductors and capacitors. It features a unique current-sense mechanism that allows the battery to be directly grounded, simplifying system design and thermal management.

Applications

Single Cell Lithium-Ion Charging
Efficiently charges 1-cell Li-ion packs from variable input rails like automotive systems or unregulated wall adapters.
NiCd/NiMH Constant Current Charging
Provides a programmable constant current output for multi-chemistry applications requiring precise current control.
SLA Battery Maintenance
Suitable for float charging sealed lead-acid batteries with a maximum pack voltage of up to 20V.

Key Specifications

Mounting Type Surface Mount
Package / Case TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
Number of Cells 1
Battery Chemistry Multi-Chemistry
Current - Charging Constant - Programmable
Battery Pack Voltage 20V (Max)
Charge Current - Max 2A
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Supply (Max) 25V
Supplier Device Package DDPAK-7

Getting Started

When designing with this SEPIC controller, ensure low ESR capacitors are used to handle high ripple currents. Programming the charge current is achieved by selecting appropriate resistor values for the feedback loop as detailed in the datasheet application circuits.

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