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參數資料
| 型號： | AT1380AS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/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安培開關穩壓器 |
| 文件頁數： | 8/12頁 |
| 文件大?。?/td> | 332K |
| 代理商： | AT1380AS |
AT1380A
Preliminary Product Information
Switching Regulator Controller for LCD Bias
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
8
Functional Description
Soft Start SCP
Figure 1. Soft-Start SCP circuit
At power-on, the AT1380A enters the soft-start mode to prevent current spike and overshoot. The
capacitor CS is charged from 0V at a constant current of 1
μ
A.
The soft-start time for the duty cycle
When V
SCP
reaches 0.8V, the AT1380A leaves the soft-start mode to enter the normal mode and enable
the SCP function. If the output load conditions change rapidly causing the output to drop suddenly, the
external capacitor CS will start to charge because the error amplifier output (FB pin) is fixed at V
OM
+
.
When the external capacitor is charged above 0.8V, the output pin is set low. Once the latch circuit has
set, the capacitor CS will be discharged to low state and the latch circuit will not reset until power is
turned off or the power supply is restarted.
Short-circuit detection time (or full soft-start time) :
)
(
8
F
CS
t
PE
μ
×
=
)
(
8
F
CS
t
S
μ
×
=
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