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1996 Feb 26 9
Philips Semiconductors Objective specification
Cost effective battery monitor and fast
charge IC for NiCd and NiMH chargers
TEA1104; TEA1104T
CHARACTERISTICS
V
P
= 10 V; T
amb
=25°C; R
ref
=33kΩ;C
OSC
= 1 nF; unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply
V
P
supply voltage 5.45 − 11.5 V
∆V
P
/∆t supply voltage start rate −− 0.5 V/µs
V
clamp
clamping voltage I
clamp
=25mA 11.5 − 12.8 V
V
start
start-up voltage 6.1 6.4 6.7 V
V
pd
power-down voltage level 4.65 5.05 5.45 V
I
P
supply current outputs off −− 3mA
I
start
start-up current V
P
=4V − 45 50 µA
V
S
stabilized voltage I
S
= 1 mA 4.03 4.25 4.46 V
V
Rref
voltage range at reference resistor I
Rref
=20µA 1.18 1.25 1.31 V
TC
Vref
temperature coefficient of the
reference voltage
T
amb
= 0 to 45 °C −±60 ±120 ppm/K
I
Rref
current range of the reference
resistor
10 − 100 µA
Temperature related input; NTC
V
i(co)
input voltage level for detecting
temperature cut-off
0.75 0.81 0.87 V
V
i(co; max)
maximum input voltage level for
detecting temperature cut-off
0.92 1.0 1.08 V
V
i(co; min)
minimum input voltage level for
detecting temperature cut-off
1.85 2.0 2.15 V
I
NTC
input current V
NTC
= 1.5 V −5 − +5 µA
Output drivers
δ
LED
LED pulse duty factor 2.4 2.5 2.6 %
V
LED(sat)
LED saturation voltage I
LED(sat)
=15mA −− 600 mV
I
LI(LED)
LED input leakage current V
LED
=15V −− 5 µA
Battery monitor
I
i(bat)
input battery current V
bat
= 2.4 V − 1 − nA
V
bat
voltage range for peak detection 0.81 − 3.6 V
∆V
bat
/V
bat
peak detection level with respect to
top level
V
bat
=2V − 0.25 − %
T
j
temperature range of peak
detection
0 − 50 °C
Protections; BAT
V
bat(l)
low level battery protection voltage − 0.81 0.91 V
V
bat(h)
high level battery protection voltage 3.5 3.6 4.5 V
Oscillator
k correction factor 0.84 0.93 1.02
f
osc
frequency range 10 − 100 kHz