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參數(shù)資料
| 型號： | PIP201-12M |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 319K |
| 代理商： | PIP201-12M |
Philips Semiconductors
PIP201-12M
DC to DC converter powertrain
Preliminary data
Rev. 01 — 24 January 2002
12 of 20
9397 750 09032
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
motherboard application, with no forced air cooling, the use of thermal via holes
typically reduces the thermal resistance from 25 K/W to 20 K/W. The additional use of
a small fan can reduce this further to approximately 15 K/W.
The thermal resistance of a particular design can be measured by passing a known
current through the source-drain diode of the lower MOSFET. The direction of current
ow is into VSSO and out of VO. The volt drop between VSSO and VO is then
measured and used to calculate the power dissipation in the PIP201-12M. The case
temperature of the PIP201-12M can be measured using an infra-red thermometer.
The thermal resistance can then be calculated using the following equation:
(3)
where Tcase is the measured case temperature, Tamb is the ambient temperature, I is
the MOSFET current and VF is the volt drop between VSSO and VO.
In a multi-phase design, the thermal resistance of each PIP201-12M should be
measured with current owing in all phases.
12. Test information
Figure 13 shows the test circuit used to measure power loss in the PIP201-12M. The
output voltage is measured using an averaging circuit. This eliminates losses in the
output inductor and the pcb tracks. The calculated power loss, using this method,
includes the losses in the ESR of the input lter capacitors. This must be subtracted
from the total loss to give the net loss in the PIP201-12M.
All holes 0.5 mm diameter, 1 mm spacing.
Fig 12. Printed-circuit board thermal via pattern.
03ag36
PAD1
PAD2
PAD3
R
th j
pcb
–
()
T
case
T
amb
–
IV
F
×
-------------------------------
=
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIP201-12M-3 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DC-to-DC converter powertrain |
| PIP201-12M-3,518 | 功能描述:IC REG BUCK SYNC ADJ 20A 68HVQFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝: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: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 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| PIP202-12M | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DC to DC converter powertrain |
| PIP202-12M-2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:DC-to-DC converter powertrain |
| PIP202-12M-2 /T3 | 功能描述:直流/直流開關轉(zhuǎn)換器 TAPE7 MOSFET RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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