u2402b ETC-unknow, u2402b Datasheet - Page 11

• Manufacturer Part Number: u2402b
• Description: Fast Charge Controller Nicd/nimh Batteries
• Manufacturer: ETC-unknow

TELEFUNKEN Semiconductors
Rev. A3, 14-Nov-96
Status Control
Status control inside and outside the charging process are designated by LED
below:
The blink frequency of LED outputs can be calculated as
follows:
Oscillator
Time sequences regarding measured values and
evaluation are determined by the system oscillator. All
the technical data given in the description are with the
standard frequency 800 Hz.
It is possibe to alter the frequency range in a certain
limitation. Figure 9 shows the frequency versus
resistance curves with different capacitance values.
LED1 (red)
Blinking
OFF
OFF
ON
95 11408
LED2 (green)
10000
1000
Blinking
100
10
OFF
OFF
ON
0.1
Figure 9. Frequency versus resistance for different capacitance values
No battery, top off charge, trickle charge
Quick charge, temperature out of the window before battery insertion or power on
Temperature out of the window
Battery break (interrupt) or short circuit
C
O
C
=2.2nF
O
=10nF
f
Oscillation Frequency Adjustment
Recommendations:
0.5C charge
1C charge
2C charge
3C charge
(LED)
f
O
1
( kHz )
+
Oscillator frequency, f
Status
1
1024
and LED
0.5
2
3
500 Hz =
500 Hz =
500 Hz =
2
outputs given in the table
C
O
osc
=4.7nF
U2402B
1000 Hz
1500 Hz
250 Hz
500 Hz
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