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參數(shù)資料
| 型號(hào)： | AN5765 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | CRT heater voltage control IC |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PSFM7 |
| 封裝： | HSIP-7 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 63K |
| 代理商： | AN5765 |
AN5765
ICs for TV
6
I
Technical Information (continued)
3. Operational explanation
1) Temperature protection circuit is built in.
The circuit operates at approx. 150
°
C (typ.) and
pin 7 output becomes low-level (0 V).
If the temperature falls due to the output current
decrease, the protection circuit turns off and pin 7 re-
turns to the high-level again.
2) Pin 3 and pin 7 are equipped with current limiter circuit.
The limiter circuit operates at;
I
3
≤
400 mA
I
7
≤
1 000 mA
The current value is not guaranteed value since
the value fluctuates due to dispersion and temperature
characteristic.
3) Pin 2 (SW input) is internally biased.
Pin 2 is biased at approx. 2 V when open. Pin 2 can be biased at approx. 3 V if 22 k
resistor is connected
between pin 2 and pin 3 (5 V). However, take sufficient care to its absolute value fluctuation since the built-in
resistor of IC has its dispersion and temperature dependency.
4) The Reset output becomes Low (0.15 V or less) by pin 3 voltage (at V
3
≤
4.1 V).
If V
CC
is turned off prior to regulator output, regulator output once becomes high (0.7 V) at a voltage of 0.7
V or less but there is no problem in terms of characteristics.
V
7
0 V
150
°
C
6.45 V
T
j
V
3
5 V
0 V
400 mA
I
3
V
7
0 V
1 000 mA
6.45 V
I
7
30 k
3
2
5 V
3 V
IC inside
20 k
To microcomputer
22 k
Open
0 V
V
CC
(pin 1)
Regulator (pin 3)
Reset (pin 5)
(When pin 3 turns off first)
0 V
0.7 V
V
CC
(pin 1)
Regulator (pin 3)
Reset (pin 5)
(When V
CC
turns off first)
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