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DESCRIPTION

The DS2715 is well suited for cost-sensitive charger

applications where the battery pack is either internal

or external to the application. It has been optimized for

safe and reliable charging of 1 to 10 NiMH cells in

series. The internal gain block can be selected as

either a comparator or transconductance amplifier for

charge current regulation. This makes the DS2715

configurable as a switched DC charger, a linear

current regulator, or a switchmode current source.

The DS2715 pre-conditions severely depleted cells

before entering full charge mode. It terminates full

charge using the dT/dt technique, which requires an

external sensing thermistor. Over-temperature, under-

temperature, and over-voltage detection prevents

charging under unsafe conditions. A user selectable

charge timer allows charge rates from 0.167C to 2C.

FAST-CHARGE, TOPOFF and DONE modes are

included for highly reliable, safe charging of NiMH

cells. Discharge mode allows the DS2715 to enter a

low power sleep state while the cell pack is being

discharged.

FEATURES

Cell Conditioning

Power Sleep Mode (Less than 10µA) while the

Cell Pack is Discharged

Stress

Safety and Secondary Termination

or Switch-Mode Control

APPLICATIONS

Portable DVD Players

Portable Television Sets

Handheld Gaming

Test Equipment

Handheld POS Terminals

PIN CONFIGURATION

Table 1. ORDERING INFORMATION

+ Denotes a lead(Pb)-free/RoHS-compliant package.

T&R = Tape and reel.

OPERATIONAL DIAGRAM

PART

MARKING

PIN-PACKAGE

DS2715Z+

D2715

16 SO

DS2715Z+T&R

D2715

16 SO

DS2715BZ+

D2715B

16 SO

DS2715BZ+T&R

D2715B

16 SO

DS2715

NiMH Battery Pack Charge Controller

www.maxim-ic.com

See Table 1 for Ordering Information.

16 SO

LED1

DNC

CTG

CTG

THM

SNS-

SNS+

DIV

MODE

Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

19-4592; 4/09