SM6781BV

NIPPON PRECISION CIRCUITS—1

NIPPON PRECISION CIRCUITS INC.

Ni-MH/Ni-Cd Battery Charger IC

OVERVIEW

The SM6781BV is a quick charge control IC for Nickel Metal Hydride (NiMH) and Nickel-Cadmium (NiCd)

rechargeable batteries. Quick charging ends in response to negative delta voltage detection (–

∆V) and maxi-

mum charging time detection functions. Also, quick charge mode is placed on hold if the battery voltage

becomes abnormal, until normal conditions are restored. The SM6781BV requires few external components to

realize a high-stability quick charge battery charger.

FEATURES

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Ni-MH/Ni-Cd battery quick charge control

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−∆V and maximum charge time cutoffs

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15min (typ)

−∆V detection invalid time

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– 4mV (typ)

−∆V detection accuracy

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Inhibit function

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Charge condition LED indicator output

(on, pulsed, off)

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Low power dissipation standby mode (< 1

µA)

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8-pin VSOP package

ORDERING INFORMATION

PINOUT

(Top view)

PACKAGE DIMENSIONS

(Unit: mm)

Device

Package

SM6781BV

8-pin VSOP

TIME

CHGN

INH

NC

VDD

LEDN

BATT

VSS

TBD