MRF157 Просмотр технического описания (PDF) - Motorola => Freescale

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Компоненты Описание

производитель

MRF157

600 W, to 80 MHz MOS LINEAR RF POWER FET

Motorola => Freescale 

4

VDD = 60 V

IDQ = 2 x 800 mA

3

f = 30 MHz

t1 = 1 ms (See Fig. 9)

t2 = 10 ms (See Fig. 9)

2

1

0

0

20

40

60

80

100

Pin, POWER INPUT (WATTS)

Figure 8. Output Power versus Input Power

Under Pulse Conditions (2 x MRF157)

1

D = 0.5

0.5

0.2

0.2

0.1

0.1

0.05

0.05

0.02

0.02

SINGLE PULSE

0.0110–2

10–1

1

RθJC(t) = r(t) RθJC

RθJC = 0.13°C/W MAX

D CURVES APPLY FOR POWER

PULSE TRAIN SHOWN

READ TIME AT t1

TJ(pk) – TC = P(pk) RθJC(t)

P(pk)

t1

t2

DUTY CYCLE, D = t1/t2

10

102

103

104

PULSE WIDTH, t (ms)

Figure 9. Thermal Response versus

Pulse Width

Note: Pulse data for this graph was taken in a push–pull circuit similar

Note: to the one shown. However, the output matching network was

Note: modified for the higher level of peak power.

f = 100 MHz

60

30

15

7.5 Zin

4.0

VDD = 50 V

IDQ = 800 mA

Pout = 600 W

2.0

Zo = 10 Ω

(VCC – Vsat)2

Note: To determine ZOL*, use formula

2 Po

= ZOL*

Figure 10. Series Equivalent Impedance

MRF157

4

MOTOROLA RF DEVICE DATA

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