TEA1104T View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TEA1104T

Cost effective battery monitor and fast charge IC for NiCd and NiMH chargers

Philips Electronics 

Philips Semiconductors

Cost effective battery monitor and fast

charge IC for NiCd and NiMH chargers

Objective specification

TEA1104; TEA1104T

FEATURES

• Accurate detection of fully charged batteries by

currentless peak voltage sensing

• Switch-over from fast to safe trickle charge current at

battery full detection

• Fast charge termination back-up by maximum time and

maximum temperature detection

• Several trickle charge drive possibilities for mains

isolated and non-mains isolated systems

• Battery checking to protect against short-circuited and

open batteries

• Battery monitor allows recharging of different battery

packs in the same charger

• Dual LED indicator provision

• External regulator not required because of large input

voltage range

• Few low cost external components required.

APPLICATIONS

• Portable telephone

• Portable computer

• Portable audio

• Portable video.

GENERAL DESCRIPTION

The TEA1104 is manufactured in a BiCMOS process

intended to be used as a battery monitor circuit in charge

systems for NiCd and NiMH batteries. It is especially

designed for cost effective compact consumer

applications.

The circuit is able to detect fully charged batteries by

currentless battery voltage sensing. Several output drive

functions are available to control the (reduced) trickle

charge current to keep the batteries full with maximum life

expectations.

The battery full detection is backed up by two independent

mechanisms to make the system fail safe; maximum time

and maximum temperature.

QUICK REFERENCE DATA

SYMBOL

VP

IP

Vbat

∆Vbat/Vbat

Ibat

Vbat(l)

Vbat(h)

fosc

PARAMETER

CONDITIONS

supply voltage

supply current

outputs off

voltage range of battery full detection

voltage peak detection level with

respect to top value

battery monitor input current

battery voltage protection low

battery voltage protection high

oscillator frequency

MIN.

5.45

−

0.81

−

TYP.

−

−

−

0.25

MAX.

11.5

3

3.6

−

UNIT

V

mA

V

%

−

−

1

nA

−

0.81 0.91 V

3.5

3.6

−

V

10

−

100

kHz

ORDERING INFORMATION

TYPE

NUMBER

TEA1104

TEA1104T

NAME

DIP8

SO8

PACKAGE

DESCRIPTION

plastic dual in-line package; 8 leads (300 mil)

plastic small outline package; 8 leads; body width 3.9 mm

VERSION

SOT97-1

SOT96-1

1996 Feb 26

2

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