參數(shù)資料
型號(hào): PQ1PF1
廠商: Sharp Corporation
元件分類: 基準(zhǔn)電壓源/電流源
英文描述: Primary Regulator for Switching Power Supply (50W Class)
中文描述: 主要規(guī)管的開關(guān)電源(50瓦級(jí))
文件頁(yè)數(shù): 9/14頁(yè)
文件大?。?/td> 78K
代理商: PQ1PF1
Primary Regulators
PQ1PF1
3-3 Overvoltage protection function
Fig.4 shows overvoltage protection circuit. Photocoupler PC
2
becomes ON-state when output voltage is in overvoltage condition.
When PC
2
is ON-state, current from Vcc via resistor R charges capacitor C
A
and CA voltage V
CA
increases. When V
CA
reaches CA
threshold voltageV
CA( OVP)
7.7V, internal constant voltage supply of IC becomes OFF-state and maintain shut-down state. To maintain
output shut-down condition, 0.3mA (Vcc=11V) TYP. is reguired. To restart, Vcc needs to be lowered less than operation stopping
voltage V
CC(OFF)
9.3V by applying input voltage again.
Fig.4 Overvoltage Protection Cricuit
3-4 ON/OFF control function
IC operation can be stopped and output voltage can be OFF-state by lowering CA voltage V
CA
less than 0.6V TYP. Fig.5 shows ON/
OFF control circuit. When transistor Q
1
becomes ON-state by external signal and V
CA
is less than 0.6V, output turns off. Output is
ON-state again by soft start function which is caused by Q
1
OFF.
Fig. 5 ON/OFF Control Function
R
PC
2
C
A
3
CA
V
CC
5
PQ1PF1
CA
PQ1PF1
3
C
A
Q
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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PQ1R23 功能描述:IC REG LDO 2.3V .15A SOT-23L RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正,固定式 輸出電壓:3.3V 輸入電壓:2.5 V ~ 5.5 V 電壓 - 壓降(標(biāo)準(zhǔn)):0.1V @ 200mA 穩(wěn)壓器數(shù)量:2 電流 - 輸出:300mA 電流 - 限制(最?。?350mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-UFQFN 供應(yīng)商設(shè)備封裝:8-MLPQ-UT(1.5x1.5) 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:1358 (CN2011-ZH PDF) 其它名稱:SC560HULCT