IRFR3709ZTRR datasheet(6/11 Pages) KERSEMI

Part #	IRFR3709ZTRR

Description	High Frequency Synchronous Buck Converters for Computer Processor Power

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Manufacturer	KERSEMI [Kersemi Electronic Co., Ltd.]

Direct Link	http://www.kersemi.com

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6 / 11 page

IRFR/U3709ZPbF

6

www.kersemi.com

D.U.T.

VDS

ID

IG

3mA

VGS

.3

µF

50K

Ω

.2

µF

12V

Current Regulator

Same Type as D.U.T.

Current Sampling Resistors

+

-

Fig 13. Gate Charge Test Circuit

Fig 12b. Unclamped Inductive Waveforms

Fig 12a. Unclamped Inductive Test Circuit

tp

V(BR)DSS

IAS

Fig 12c. Maximum Avalanche Energy

vs. Drain Current

RG

IAS

0.01

Ω

tp

D.U.T

L

VDS

+

-

VDD

DRIVER

A

15V

20V

VGS

25

50

75

100

125

150

175

Starting TJ , Junction Temperature (°C)

0

50

100

150

200

250

300

350

400

450

ID

TOP

6.6A

8.4A

BOTTOM 12A

Fig 14a. Switching Time Test Circuit

Fig 14b. Switching Time Waveforms

V

GS

V

DS

90%

10%

t

d(on)

t

d(off)

t

r

t

f

V

GS

Pulse Width < 1µs

Duty Factor < 0.1%

V

DD

V

DS

L

D

D.U.T

+

-

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