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參數(shù)資料
| 型號： | AT1380AS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗輻射高效，5安培開關(guān)穩(wěn)壓器 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 332K |
| 代理商： | AT1380AS |
AT1380A
Preliminary Product Information
Switching Regulator Controller for LCD Bias
a voltage to pulse width converter that controls the ON time of the output pulse depending on the
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 WWW:
http://www.aimtron.com.tw
Fax: 886-3-563-0879 Email:
service@aimtron.com.tw
10
level of input voltage. The output level remains high when the sawtooth wave is lower than the
error amplifier output voltage, the soft start setting voltage, and the idle period setting voltage.
(4) Output circuit
The output circuit can drive an external NPN transistor directly and has a totem pole
configuration. The value of the ON/OFF current can be set by a resistor connected to the
BR/CTL pin (pin 4). Stand-by mode (supply current 1
μ
A or less) can be set by connecting the
BR/CTL pin (pin4) to VCC or by making the pin open.
(5) Under-Voltage Lockout (UVLO)
Transients during powering on or instantaneous glitches in the supply voltage can cause the
control IC to malfunction and damage the system. To prevent malfunction at low input voltage,
the circuit compares the supply voltage to the internal reference voltage to detect a low input
voltage. Once detected, the circuit sets the output pin low.
To cancel the status, set V
CC
below the reset voltage V
R
(0.9V) and then set V
CC
up to the
recommended operation range and the latch will be restored to operate normally.
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