Datasheet > F0240YH300

F0240YH300

更新时间： 2023-12-06 20:13:13

品牌	Logo	应用领域
力特 - LITTELFUSE		开关
页数	文件大小	规格书
12页	653K
描述
此系列产品可提供最低的反向恢复电流实际值，同时提供现代开关器件所需的宽安全工作区和较高的DI/DT性能。? 如要了解其他详细技术信息，请联系支持部门。

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F0240YH300 数据手册

WESTCODE An IXYS Company

Extra Fast Recovery Diode Types F0240Y#250 to F0240Y#300

5.0 Reverse Recovery Loss

The following procedure is recommended for use where it is necessary to include reverse recovery

loss.

From waveforms of recovery current obtained from a high frequency shunt (see Note 1) and reverse

voltage present during recovery, an instantaneous reverse recovery loss waveform must be

constructed. Let the area under this waveform be E joules per pulse. A new sink temperature can then

be evaluated from:

T_SINK= T_{J (MAX )}− E 

Where k = 0.2314 (°C/W)/s



k + f  R_thJK



E = Area under reverse loss waveform per pulse in joules (W.s.)

f = Rated frequency in Hz at the original sink temperature.

R_thJK= d.c. thermal resistance (°C/W)

The total dissipation is now given by:

W =W_(original)+ E f

(tot)

NOTE 1 - Reverse Recovery Loss by Measurement

This device has a low reverse recovered charge and peak reverse recovery current. When measuring

the charge, care must be taken to ensure that:

(a) AC coupled devices such as current transformers are not affected by prior passage of high

amplitude forward current.

(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring

oscilloscope to avoid overloading the internal amplifiers by the relatively high amplitude forward current

signal.

damped snubber, connected across diode anode to cathode. The formula used for the calculation of

this snubber is shown below:

V_r

C_S

R²= 4

Where: V_r= Commutating source voltage

C_S= Snubber capacitance

R = Snubber resistance

6.0 Snubber Components

When selecting snubber components, care must be taken not to use excessively large values of

snubber capacitor or excessively small values of snubber resistor. Such excessive component values

may lead to device damage due to the large resultant values of snubber discharge current. If required,

please consult the factory for assistance.

Data Sheet. Types F0240Y#250 to F0240Y#300 Issue 1

Page 4 of 12

August, 2004

1 2 345 6 7...12

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