LTC4060

PRODUCTION

Standalone Linear NiMH/NiCd Fast Battery Charger

Part Models: 4
1ku List Price: Starting From $4.94

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Overview

Complete Fast Charger Controller for Single, 2-, 3- or 4-Series Cell NiMH/NiCd Batteries
No Firmware or Microcontroller Required
Termination by –∆V, Maximum Voltage or Maximum Time
No Sense Resistor or Blocking Diode Required
Automatic Recharge Keeps Batteries Charged
Programmable Fast Charge Current: 0.4A to 2A
Accurate Charge Current: ±5% at 2A
Fast Charge Current Programmable Beyond 2A with External Sense Resistor
Automatic Detection of Battery
Precharge for Heavily Discharged Batteries
Optional Temperature Qualified Charging
Charge and AC Present Status Outputs Can Drive LED
Automatic Sleep Mode with Input Supply Removal
Negligible Battery Drain in Sleep Mode: <1µA
Manual Shutdown
Input Supply Range: 4.5V to 10V
Available in 16-Lead DFN and TSSOP Packages

The LTC4060 is a complete fast charging system for NiMH or NiCd batteries. Just a few external components are needed to design a standalone linear charging system.

An external PNP transistor provides charge current that is user programmable with a resistor. A small external capacitor sets the maximum charge time. No external current sense resistor is needed, and no blocking diode is required.

The IC automatically senses the DC input supply and battery insertion or removal. Heavily discharged batteries are initially charged at a C/5 rate before a fast charge is applied. Fast charge is terminated using the –∆V detection method. Backup termination consists of a programmable timer and battery overvoltage detector. An optional external NTC thermistor can be used for temperature-based qualification of charging. An optional programmable recharge feature automatically recharges batteries after discharge.

Manual shutdown is accomplished with the SHDN pin, while removing input power automatically puts the LTC4060 into sleep mode. During shutdown or sleep mode, battery drain is <1µA.

The LTC4060 is available in both low profile (0.75mm) 16- pin 5mm × 3mm DFN and 16-lead TSSOP packages. Both feature exposed metal die mount pads for optimum thermal performance.

Applications

Portable Computers, Cellular Phones and PDAs
Medical Equipment
Charging Docks and Cradles
Portable Consumer Electronics

Part Models: 4
1ku List Price: Starting From $4.94

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4060EDHC#PBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4060EDHC#TRPBF	16-Lead DFN (5mm x 3mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4060EFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4060EFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LTC4060EFE#PBF	PRODUCTION
LTC4060EFE#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 1
LTM8061	RECOMMENDED FOR NEW DESIGNS	32V, 2A μModule (Power Module) Li-Ion/Polymer Battery Charger
Circuit Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Protection Switches & Controllers 2
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit
LTC2955	RECOMMENDED FOR NEW DESIGNS	Pushbutton On/Off Controller with Automatic Turn-On

Evaluation Kits

LTC4060EFE Demo Board | 2A NiMH/NiCD Linear Charger with Termination, VIN = 4.5V to 10V, IOUT = 0.5A/1A/2A

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Product Details

Demonstration circuit 783 is a complete Fast Battery Charger capable of charging 1, 2, 3 or 4 series connected NiMH or NiCd cells using the LTC4060 linear battery charger. This demo circuit determines when the battery is fully charged using the -ΔV method with peak voltage and a safety timer as a backup termination. The input voltage range is 4.5V to 10V for a single cell and 8.6V to 10V for four cells.

The power portion of the circuit consists of a PNP power transistor constant current source which can provide up to 2A of charge current under some conditions. Jumpers are provided for programming charge currents of 0.5A, 1A or 2A. Other charge currents can be programmed by adding an external resistor to the PROG terminal post. Charge current greater than 2A can also be programmed by paralleling an external current sense resistor (R5) with the internal LTC4060 sense resistor).

Included on the board are jumpers to select NTC thermistor functions, battery chemistry, number of series cells, safety timer length, recharge voltage and two LEDs to indicate charger status. A power path FET is also included that provides a low loss path between the battery and an external system load when the input power is removed.