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Philips Semiconductors
Cost effective battery monitor and fast
charge IC for NiCd and NiMH chargers
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.
QUICK REFERENCE DATA
SYMBOL
V
supply voltage
P
I
supply current
P
V
voltage range of battery full detection
bat
V
/V
voltage peak detection level with
bat
bat
respect to top value
I
battery monitor input current
bat
V
battery voltage protection low
bat(l)
V
battery voltage protection high
bat(h)
f
oscillator frequency
osc
ORDERING INFORMATION
TYPE
NUMBER
NAME
TEA1104
DIP8
TEA1104T
SO8
1996 Feb 26
PARAMETER
plastic dual in-line package; 8 leads (300 mil)
plastic small outline package; 8 leads; body width 3.9 mm
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.
CONDITIONS
outputs off
PACKAGE
DESCRIPTION
2
Objective specification
TEA1104; TEA1104T
MIN.
TYP.
MAX.
5.45
11.5
3
0.81
3.6
0.25
1
0.81
0.91
3.5
3.6
10
100
UNIT
V
mA
V
%
nA
V
V
kHz
VERSION
SOT97-1
SOT96-1
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