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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)： | 8/14頁(yè) |
| 文件大?。?/td> | 78K |
| 代理商： | PQ1PF1 |
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Primary Regulators
C
A
PC
1
4
3
5
1
2
PQ1PF1
PQ1PF1
Output current
V
FB
V
FB
(OCP)
2.8V
V
CA
3.6V
V
CA
(OVP)
7.7V
D
MAX
D
MIN
0
Overcurrent
detection
Overload shut-down
3-2 Overcurrent protection function
Overcurrent protection circuit is shown in Fig.2. Fig.3 shows timing chart of OFF control process after detecting overcurrent.
First, drain current of MOS-FET (which is built-in device) is getting high due to overcurrent. When it comes up to overcurrent
detection level I
D(OCP)
=2.5A, overcurrent protection circuit will operate and minimize output pulse width to minimum duty by pulse-
by-pulse. Minimizing output pulse width makes output voltage lower. As output voltage is lowered, collector-emitter voltage of
PC
1
will be turned OFF and FB voltage V
FB
will be high. When V
FB
comes up to threshold voltage of overload shut-down V
FB(OCP)
2.8V, CA voltage V
CA
will be released from clamped voltage 3.6V and the capacitor C
A
which is connected to CA terminal will be
charged again by 10
μ
A of charge current. When V
CA
increases to 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 required. To restart, Vcc needs to be lowered less then operation stopping voltageV
CC(OFF)
9.3V by applying input voltage again.
Fig.2 Overcurrent Protection Circuit
Fig.3 Timing Chart Overcurrent Protection
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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: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（最小）: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 |
| 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: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（最小）: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 |
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