ARF476FL datasheet(3/14 Pages) MICROCHIP

3 / 14 page

Table 1-3. Thermal Characteristics (per side)

Symbol

Characteristic

Min

Typ

Max

Unit

RθJC

Junction-to-case thermal resistance

0.15

0.165

°C/W

RθJHS

Junction-to-sink thermal resistance (Use

high-efficiency thermal grease and

planar heat sink surface.)

0.30

0.33

The following table shows the dynamic characteristics of the ARF476FL device. TC = 25 °C unless otherwise

specified.

Table 1-4. Dynamic Characteristics (per Section)

Symbol

Characteristic

Test Conditions

Min

Typ

Max

Unit

Ciss

Input capacitance

VGS = 0 V, VDS = 50 V, f = 1 MHz

740

830

Coss

Output capacitance

125

130

Crss

Reverse transfer

capacitance

td(on)

Turn-on delay time

VGS = 15 V, VDD = 250 V, ID =

ID[Cont.] at 25 °C, Rg = 1.6 Ω

5.1

Rise time

4.1

td(off)

Turn-off delay time

Fall time

4.0

The following table shows the functional characteristics of the ARF476FL device. TC = 25 °C unless otherwise

specified.

Table 1-5. Functional Characteristics (Push-Pull Configuration)

Parameter Characteristic

Test Conditions

Min

Typ

Max

Unit

GPS

Common source

amplifier power gain

f = 128 MHz, VDD = 150 V, IDQ =

15 mA, Pout = 900 W, PW = 3 ms,

10% duty cycle

Drain efficiency

Electrical

ruggedness VSWR

5:1

No degradation in output power

ARF476FL

Device Specifications

and its subsidiaries

Datasheet

DS00004436A-page 3

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