IRFB4019PBF datasheet(5/8 Pages) IRF

部件名	IRFB4019PBF

功能描述	Low QRR for Better THD and Lower EMI

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制造商	IRF [International Rectifier]

网页	http://www.irf.com

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5 / 8 page

IRFB4019PbF

www.irf.com

5

Fig 13. Maximum Avalanche Energy Vs. Drain Current

Fig 12. On-Resistance Vs. Gate Voltage

Fig 14. Typical Avalanche Current Vs.Pulsewidth

Fig 15. Maximum Avalanche Energy Vs. Temperature

Notes on Repetitive Avalanche Curves , Figures 14, 15:

(For further info, see AN-1005 at www.irf.com)

1. Avalanche failures assumption:

Purely a thermal phenomenon and failure occurs at a

temperature far in excess of Tjmax. This is validated for

every part type.

2. Safe operation in Avalanche is allowed as long as neither

Tjmax nor Iav (max) is exceeded

3. Equation below based on circuit and waveforms shown in

Figures 17a, 17b.

4. PD (ave) = Average power dissipation per single

avalanche pulse.

5. BV = Rated breakdown voltage (1.3 factor accounts for

voltage increase during avalanche).

6. Iav = Allowable avalanche current.

7.

∆T = Allowable rise in junction temperature, not to exceed

Tjmax (assumed as 25°C in Figure 14, 15).

tav = Average time in avalanche.

D = Duty cycle in avalanche = tav ·f

ZthJC(D, tav) = Transient thermal resistance, see figure 11)

PD (ave) = 1/2 ( 1.3·BV·Iav) = DT/ ZthJC

Iav = 2DT/ [1.3·BV·Zth]

EAS (AR) = PD (ave)·tav

4

6

8

10

12

14

16

VGS, Gate-to-Source Voltage (V)

0.0

0.1

0.2

0.3

0.4

0.5

TJ = 25°C

TJ = 125°C

ID = 10A

25

50

75

100

125

150

175

Starting TJ, Junction Temperature (°C)

0

50

100

150

200

250

300

I D

TOP

1.3A

2.3A

BOTTOM

10A

25

50

75

100

125

150

175

Starting TJ , Junction Temperature (°C)

0

20

40

60

80

TOP

Single Pulse

BOTTOM 1% Duty Cycle

ID = 10A

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

tav (sec)

0.1

1

10

100

0.05

Duty Cycle = Single Pulse

0.10

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Τ j = 25°C and

Tstart = 150°C.

0.01

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Tj = 150°C and

Tstart =25°C (Single Pulse)

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