Maxim > Products > Power and Battery Management > DS2711, DS2712

DS2711, DS2712

Loose-Cell NiMH Chargers

NiMH Battery Charger Detects and Avoids Charging Alkaline Cells

Overview

Technical Documents

Ordering Info

Status

Part Number	Status
DS2711	Active: In Production.
DS2712	Active: In Production. See Ordering Information for details.

Description

The DS2711 and DS2712 are ideal for in-system or stand-alone charging of 1 or 2 AA or AAA NiMH "loose" cells. Temperature, voltage, and charge time are monitored to provide proper fast charging control algorithms for nickel metal hydride (NiMH) batteries. Battery tests are included to detect defective or inappropriate cells such as alkaline primary batteries. The DS2711/DS2712 support series and parallel topologies, with independent monitoring and control of each cell. Charging of NiCd chemistry cells is also supported.

Awards

DS2711: EDAW-NEC Power-Supply Product Award Winner 2005

DS2711 Loose Cell NiMH Linear Charger: EDN Innovation Award, Finalist 2004

Data Sheet

Download	Rev 4	(PDF, 236kB)
E-Mail

An evaluation kit is available: DS2711K, DS2712K

Key Features

Charge 1 or 2 NiMH Cells
Detect and Avoid Charging Alkaline Cells
Precharge Deeply Depleted Cells
Fast Charge NiMH with -ΔV Termination Sensitivity of 2mV (typ)
Monitor Voltage, Temperature, and Time for Safety and Secondary Termination
Regulate Charge Current:
- Linear Control (DS2711)
- Switch-Mode Control (DS2712)
Drive PMOS or PNP-Type Pass Element or Switch, or an Optocoupler
Compatible with Popular Optocouplers and Integrated Primary Side PWM Controllers
Small 16-Pin SO or TSSOP Package

Applications/Uses

Desktop/Stand-Alone Chargers (AAA/AA)
Digital Still Cameras
Gaming
Music Players
Toys

Key Specifications:

Battery Chargers

Part Number

Cell Chemistry

NiMH/ NiCd Cells

Protected V_IN
(V)

Charging V_IN
(V)

Charge Rate Set by

Charge Termination

Charge Regulation

EV Kit

Oper. Temp.
(°C)

Package/Pins

Smallest Available Pckg.
(mm²)

Budgetary Price

max

max w/pins

See Notes

DS2712

NiCd

NiMH

5.5

Resistor

-ΔV

Switchmode

Yes

-20 to +70

SOIC(N)/16

TSSOP/16

61.9

$1.92 @1k

DS2711

Linear

SOIC(N)/16

TSSOP/16

$1.92 @1k

See All Battery Chargers (68)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Block Diagram

Application Notes

Application Note 3388		Detecting Primary Cells with the DS2711/12
Application Note 3607		Charging batteries from USB
Tutorial 3999		Overview of Rechargeable Batteries and Fast Stand-Alone Chargers
Application Note 4215		Estimating Switching Speed for the DS2712 NiMH Battery Charger

Reliability Reports

Reliability Report:

DS2711.pdf DS2712.pdf

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2711E+			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711E+T&R			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711EB+			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711EB+T			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711Z+			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711Z+T&R			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711ZB+			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2711ZB+T			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712E+			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712E+T&R			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2712E-C01+T&R			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712EB+			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712EB+T			Active		TSSOP;16 pin;33.4 mm² Outline Drawing:21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712Z		N/A	No Longer Available	DS2712Z+	SOIC; Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS2712Z+			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712Z+T&R			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712Z/T&R		N/A	No Longer Available	DS2712Z+T&R	SOIC; Land Pattern: Not Available	-40°C to +85°C	See data sheet
DS2712ZB+			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2712ZB+T			Active		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

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Evaluation Kits

DS2711K, DS2712K

Evaluation Kit for the DS2711 and DS2712

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