ELM380P datasheet, PDF - EEWORLD Datasheet

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ELM380P: DescriptionBATTERY CHARGER TIMER; File Size21KB，4 Pages; ManufacturerETC

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ELM380P Overview

BATTERY CHARGER TIMER

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ELM380

Battery Charger Timer

Description

The ELM380 is an 8 pin integrated circuit that is

used to provide very long time interval outputs. It is

typically used for enabling the charge circuit in

Nickel Cadmium battery chargers, but can be easily

adapted for many other applications.

An express ‘one button’ mode is provided on

chip specifically for rechargeable battery circuits. In

this mode, pressing the start button once initiates a

user selectable 8 or 14 hour timing interval, after

which the circuit shuts off. If one prefers, pressing

that same button multiple times will allow for user

programmable intervals of from 2 to 77 hours.

The circuit requires a 60Hz full-wave rectified

signal for its operation. This 120Hz time base is

used for all of the timekeeping functions, providing

good long term stability and low cost.

Interfacing to the ELM380 is simplified by the

provision of internal pull-up resistors so that the

mechanical switches can be directly connected

without additional components, or simply not used,

depending on the application.

Features

• Low power CMOS design - typically 1mA at 5V

• Wide supply range - 3.0 to 5.5 volt operation

• Quick settings of 8 or 14 hours

• Complementary outputs simplify designs

• External reset input for system use

• Internal pullup resistors for switch inputs

• High current drive outputs - up to 25 mA

• Line frequency input for accurate timing

Connection Diagram

PDIP and SOIC

(top view)

Out

start

8/14 hrs

Clock

Applications

• Ni-Cd battery chargers

• Yard lighting or watering controls

• Houseplant grow lamp controllers

reset

Block Diagram

start

Debounce

Timers

Control

and

Counters

Out

8/14 hrs

Clock

reset

ELM380DSB

Elm Electronics – Circuits for the Hobbyist

< http://www.elmelectronics.com/ >

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ELM380P Related Products

	ELM380P	ELM380SM	ELM380
Description	BATTERY CHARGER TIMER	BATTERY CHARGER TIMER	BATTERY CHARGER TIMER

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