33288 datasheet(10/15 Pages) FREESCALE

Part #	33288

Description	Solid State Relay for Automotive Flasher Applications

PDF	15 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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10 / 15 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33288

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

Transient Thermal Model

A more complete model including thermal capacitance is

proposed in Figure 3.

Figure 5. Transient Thermal Model

This gives a thermal impedance versus time (Figure 4),

which has been determined with the printed circuit board

shown in Figure 1.

Figure 6. Junction to Ambiant Thermal Impedance

This figure shows that the steady state is reached after

about 10 minutes. It also clearly shows that the device can

dissipate almost twice the power within one minute compared

to the maximum allowed power dissipation in steady state.

MOS1

MOS2

Control

Case

Board

Ambiant

3K/W

450K/W

3K/W

20K/W

6J/K

0.5J/K

4mJ/K

5mJ/K

1mJ/K

3.5K/W

300K/W

MOS3

100

200

300

400

500

600

700

800

Time (sec.)

33288 Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc

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