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參數(shù)資料
| 型號： | PIP250M |
| 英文描述： | Integrated buck converter |
| 中文描述： | 集成的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/19頁 |
| 文件大?。?/td> | 334K |
| 代理商： | PIP250M |
Philips Semiconductors
PIP250M
Integrated buck converter
Product data
Rev. 02 — 21 February 2003
6 of 19
9397 750 10904
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7.2.5
Overcurrent protection
The overcurrent protection function is shown in
Figure 4
. The overcurrent trip function
is enabled when the upper MOSFET gate drive signal is HIGH.
During this interval, the voltage on the PHASE input is compared with the voltage on
the OCSET/ENABLE input. If the voltage on the PHASE input is lower than the
voltage on the OCSET/ENABLE input, then the PIP250M detects an overcurrent trip
condition and turns off the gate drive to the upper MOSFET. There is an internal filter
with a time constant of 30
μ
s in series with the PHASE input. Since the switching
frequency is 300 kHz, this means that the overcurrent trip operates if the overcurrent
condition persists for10 switching cycles.
If three overcurrent pulses are detected, the PIP250M latches off and produces no
more pulses until it has been reset. To reset the PIP250M, the supply voltage (V
DDC
)
must be reduced below the power down reset threshold and then increased back up
to 5 V.
An external resistor (R
OCSET
) sets the overcurrent trip level.
Figure 5
shows the
overcurrent trip level (I
TRIP
) as a function of R
OCSET
.
Fig 4.
Overcurrent protection.
OC
ROCSET
1 nF
03ak44
CONTROL
LOGIC
40
μ
A
5 V
VO
VDDO
OCSET/
ENABLE
PHASE
PIP250M
strobe
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIP3103-T | TRANSISTOR | MOSFET | N-CHANNEL | SOT-223 |
| PIP3106-D | TRANSISTOR | MOSFET | N-CHANNEL | 50V V(BR)DSS | TO-252AA |
| PIP3107-D | TRANSISTOR | MOSFET | N-CHANNEL | 50V V(BR)DSS | TO-252AA |
| PIP3104 | PowerMOS transistor Logic level TOPFET |
| PIP3104-P | PowerMOS transistor Logic level TOPFET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIP250M,518 | 功能描述:IC REG BUCK SYNC ADJ 15A 68HVQFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| PIP26U | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Fibers can be free cut using fiber cutter |
| PIP30 | 制造商:Microsemi Corporation 功能描述:TVS SGL BI-DIR 42.5V 7.5KW 2PIN CASE 11 - Bulk 制造商:ProTek Devices 功能描述:Suppressor Assembly 30V 7.5KW |
| PIP3101-A,127 | 功能描述:MOSFET RAIL TOPFET2 RoHS:否 制造商:STMicroelectronics 晶體管極性:N-Channel 汲極/源極擊穿電壓:650 V 閘/源擊穿電壓:25 V 漏極連續(xù)電流:130 A 電阻汲極/源極 RDS（導(dǎo)通）:0.014 Ohms 配置:Single 最大工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:Max247 封裝:Tube |
| PIP3102-R | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:LOGIC LEVEL TOPFET |
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