LTC4011

PRODUCTION

High Efficiency Standalone Nickel Battery Charger

Part Models: 2
1ku List Price: Starting From $5.55

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Overview

Complete NiMH/NiCd Charger for 1 to 16 Cells
No Microcontroller or Firmware Required
550kHz Synchronous PWM Current Source Controller
No Audible Noise with Ceramic Capacitors
PowerPath^™ Control Support
Programmable Charge Current: 5% Accuracy
Wide Input Voltage Range: 4.5V to 34V
Automatic Trickle Precharge
–ΔV Fast Charge Termination
Optional ΔT/Δt Fast Charge Termination
Automatic NiMH Top-Off Charge
Programmable Timer
Automatic Recharge
Multiple Status Outputs
Micropower Shutdown
20-Lead Thermally Enhanced TSSOP Package

The LTC4011 provides a complete, cost-effective nickel battery fast charge solution in a small package using few external components. A 550kHz PWM current source controller and all necessary charge initiation, monitoring and termination control circuitry are included.

The LTC4011 automatically senses the presence of a DC adapter and battery insertion or removal. Heavily discharged batteries are precharged with a trickle current. The LTC4011 can simultaneously use both –ΔV and ΔT/Δt fast charge termination techniques and can detect various battery faults. If necessary, a top-off charge is automatically applied to NiMH batteries after fast charging is completed. The IC will also resume charging if the battery self-discharges after a full charge cycle.

All LTC4011 charging operations are qualified by actual charge time and maximum average cell voltage. Charging may also be gated by minimum and maximum temperature limits. NiMH or NiCd fast charge termination parameters are pin-selectable.

Integrated PowerPath control support ensures that the system remains powered at all times without allowing load transients to adversely affect charge termination.

Applications

Integrated or Standalone Battery Charger
Portable Instruments or Consumer Products
Battery-Powered Diagnostics and Control
Back-Up Battery Management

Part Models: 2
1ku List Price: Starting From $5.55

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
LTC4011CFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4011CFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only)
		PCN25_0016_Form Material_Report Qualification Results Summary
LTC4011CFE#PBF	PRODUCTION
LTC4011CFE#TRPBF	PRODUCTION
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
LTC4011CFE#PBF	PRODUCTION
LTC4011CFE#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 Monitors & Fuel Gauges 1
LTC2942-1	Obsolete	1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement
Oscillators 1
LTC6991	PRODUCTION	TimerBlox: Resettable, Low Frequency Oscillator
Protection Switches & Controllers 2
LTC4365	RECOMMENDED FOR NEW DESIGNS	Overvoltage, Undervoltage and Reverse Supply Protection Controller
LTC2955	RECOMMENDED FOR NEW DESIGNS	Pushbutton On/Off Controller with Automatic Turn-On

Evaluation Kits

LTC4011EFE Demo Board | VIN = 4.5V to 25V, NiCd/NiMH 2A Sync Buck Battery Charger

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Product Details

Demonstration circuit DC674B is a complete Fast Battery Charger capable of charging 3, 4, 6 or 10 series connected NiMH or NiCd cells. Other cell counts can also be charged (up to 16 cells) by installing an appropriate resistor on the board. The power portion of the circuit consists of a 550kHz synchronous step-down constant current source which provides 2A of charge current. Other charge currents can be selected by changing the sense resistor value, and for higher charge current (2 to 4A), the PC board has a dual layout for the top switch to allow a larger FET to be used. A PowerPath™ FET is also included that provides a low voltage drop path between the battery and an external system load when the input power is removed Charge termination includes -ΔV, ΔT/Δt, peak voltage and a safety timer.