U2407B Ver la hoja de datos (PDF) - Temic Semiconductors
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U2407B Datasheet PDF : 16 Pages
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U2407B
Status Control
Different status control modes can be designed by four LED outputs. Status control regards the running charge cycle
before it has been started and also after it has been terminated.
LED1
OFF
OFF
OFF
OFF
Blinking
LED2
OFF
OFF
ON
ON
OFF
LED3
OFF
Blinking
OFF
OFF
OFF
LED4
OFF
OFF
ON
OFF
OFF
Status
No battery (VBatt > 5 V)
Fast charge
Top-off charge
Trickle charge
Failure mode
Failure mode:
Temperature out of window, also before battery insertion or power-on.
Battery break, short circuit, VBatt < 0.1 V
To achieve custom specific display modes, several combinations between LED outputs 1 to 4 are recommended.
(see applications)
The blink frequency of LED outputs can be calculated as follows:
+ f(LED)
Oscillator frequency, fosc
1024
Example 1:
Display mode similar to U2402B and U2405B:
10 red
LED1
LED2
LED3
green
2
3
VS
1 kW
VS
1 kW
95 10672
LED1 (red)
(LED1)
OFF
OFF
OFF
Blinking
LED2 (green)
Status
(LED2/ LED3)
OFF
Blinking
No battery
(VBatt > 5 V)
Fast charge
ON
Top-off, trickle charge
OFF
All failure mode
Figure 8.
Example 2:
10
LED1
2
LED2
VS
3
LED3
red
green
VS
1 kW
VS
1 kW
LED1 (red)
(LED1/ LED3)
OFF
ON
OFF
Blinking
LED2 (green)
Status
(LED2)
OFF
No battery
(VBatt > 5 V)
OFF
Fast charge
ON
Top-off, trickle charge
OFF
All failure mode
95 10673
Figure 9.
TELEFUNKEN Semiconductors
Rev. A4, 05-Mar-97
9 (16)
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