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1996 Feb 26 7
Philips Semiconductors Objective specification
Cost effective battery monitor and fast
charge IC for NiCd and NiMH chargers
TEA1104; TEA1104T
handbook, full pagewidth
MGE359
V
s
> 11.5 V
6.2 V < V
s
< 11.5 V
V
s
< 5.25 V
no no
yes
yes
yes
yes
yes
no
TIME OUT > 111 min
(TO)
T
bat
≥ 55
o
C
(TCO)
-∆V
bat
≥ 0.25%
and
t
dis
> 3% TO
FAST charge
set T
cut-off
(e.g. 55
o
C)
dual LED
indication
(note 2)
dual LED
indication
dual LED
indication
trickle charge
I
fast
/ 40
battery is FULL
trickle charge
I
fast
/ 40
(note 4)
V
bat
< 0.81 V
or T
bat
< T
min
or T
bat
> T
max
(note 1)
0.81 V < V
bat
< 3.6 V
and
T
min
< T
bat
< T
max
(note 5)
circuit non-active
I
DD
≤ 45 µA
total reset logic
set TIME OUT (e.g. 111 min)
set T
max
(e.g. 48
o
C)
T
min
(e.g. 20
o
C)
circuit active
clamp at 11.5 V
I
DDmax
= 25 mA
circuit active
blinks
FAST
blinks
FAST
ON
FAST
blinks
FASTFULL
OFF
ON
FASTFULL
OFF
OFF
FASTFULL
ON
START
no
yes
yes
yes
yes
no
no
no
no
no
no
dual LED
indication
yes
yes
stop charge
total reset
open battery
OFF
FAST
OFF
FASTFULL
OFF
yes
no
(note 3)
Fig.5 Flow chart of the TEA1104.
(1) V
bat
< 0.81 V due to empty or flat battery.
(2) For single LED application see Fig.7, for dual LED
application see Fig.6.
(3) V
bat
> 3.6 V due to system occurrence or an external
inhibit via pin V
bat
.
(4) Release via reset.
(5) T
min
=V
NTC
≥ 2 V; Tmax = V
NTC
≤ 1V;
T
cut-off
=V
NTC
≤ 0.81 V.