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參數(shù)資料
| 型號(hào)： | PQ1PF1 |
| 廠(chǎng)商： | Sharp Corporation |
| 元件分類(lèi)： | 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(kāi)關(guān)電源（50瓦級(jí)） |
| 文件頁(yè)數(shù)： | 12/14頁(yè) |
| 文件大?。?/td> | 78K |
| 代理商： | PQ1PF1 |
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Primary Regulators
1-2Extending the capacity of smoothing capacitor (C
10
) for auxiliary winding voltage.
After smoothing rectification of auxiliary winding (both sides of C
10
=Vcc), ripple voltage becomes high by turns and diameter
of auxiliary winding. When voltage falls below operation stopping voltageV
CC(OFF)
, it may sometimes cause operating error.
In this case, it is recommended to extend C
10
. However, starting time becomes longer due to extending C
10
because starting
time is determined by both startig resistor R
9
and C
10
. To shorten the starting time, it is recommended to employ 2-step
rectification circuit. (Fig.8)
Fig.8 2-step Rectification Circuit
PQ1PF1
5
V
CC
R
9
D
7
C
11
22μF
2
GND
D
6
C
10
100μF
PQ1PF1
As a standard in designing, proper capacity of C
11
is 10 to 47
μ
F.
Extending the capacity of C
10
in 2-step rectification circuit, current to Vcc terminal can be supplied from storaged charge in
C
10
after starting operation IC.
1-3 Slow up input
During slow up start (input voltage is gradually rising), there is some cases that output is soon shut down after it starts to
operate. It is because output voltage does not exceed the rated value due to halfway of slow up starting.
A fall of output voltage during operating IC makes photocoupler PC
1
(Fig.2) in voltage control system OFF-state. In that
condition, CA terminal voltage is not fixed at 3.6V, and start to rise soon after starting to operate IC. When CA terminal
voltage exceeds V
CA (OVP)
7.7V, output of IC is shut down. To avoid the shud down, output must be kept the rated level,
making operation starting voltage higher. Or add a discharge circuit of capactor C
A
which is connected to CA terminal.
(Fig.9)
Fig. 9 Circuit Diagram for Slow Up Input
3 C
A
R
3
R
5
C
A
D
4
2
GND
PQ1PF1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PQ1PF2 | 制造商:SHARP 制造商全稱(chēng):Sharp Electrionic Components 功能描述:Primary Regulator for Switching Power Supply (30W Class) |
| PQ1R18 | 功能描述:IC REG LDO 1.8V .15A SOT-23L RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線(xiàn)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(lèi)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(chēng):SC560HULCT |
| PQ1R18J0000H | 功能描述:低壓差穩(wěn)壓器 - LDO LDO 1.8V 240MA RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| PQ1R22 | 制造商:SHARP 制造商全稱(chēng):Sharp Electrionic Components 功能描述:Low Output Current, Compact Surface Mount Type Low Power-Loss Voltage Regulators |
| PQ1R23 | 功能描述:IC REG LDO 2.3V .15A SOT-23L RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線(xiàn)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(lèi)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(chēng):SC560HULCT |
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