Philips TEA1104 ユーザーズマニュアル

1996 Feb 26

2

•

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.

•

Portable telephone

•

Portable computer

•

Portable audio

•

Portable video.

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.

V

P

supply voltage

5.45

−

11.5

V

I

P

supply current

outputs off

−

−

3

mA

V

bat

voltage range of battery full detection

0.81

−

3.6

V

∆

V

bat

/V

bat

voltage peak detection level with
respect to top value

−

0.25

−

%

I

bat

battery monitor input current

−

−

1

nA

V

bat(l)

battery voltage protection low

−

0.81

0.91

V

V

bat(h)

battery voltage protection high

3.5

3.6

−

V

f

osc

oscillator frequency

10

−

100

kHz

TEA1104

DIP8

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

SOT97-1

TEA1104T

SO8

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

SOT96-1