TOP209 Ver la hoja de datos (PDF) - Power Integrations, Inc

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TOP209

Three-terminal Off-line PWM Switch

Power Integrations, Inc 

TOP209/210

BENCH TEST PRECAUTIONS FOR EVALUATION OF ELECTRICAL CHARACTERISTICS

The following precautions should be followed when testing

TOPSwitch by itself outside a power supply. The schematic

shown in Figure 12 is suggested for laboratory testing of

TOPSwitch.

When the DRAIN supply is turned on, the part will be in the

auto-restart mode. The CONTROL pin voltage will be

oscillating at a low frequency from 4.7 to 5.7 V and the DRAIN

is turned on every eighth cycle of the CONTROL pin oscillation.

If the CONTROL pin power supply is turned on while in this

auto-restart mode, there is only a 12.5% chance that the

CONTROL pin oscillation will be in the correct state (DRAIN

active state) so that the continuous DRAIN voltage waveform

may be observed. It is recommended that the VC power supply

be turned on first and the DRAIN power supply second if

continuous DRAIN voltage waveforms are to be observed.

The 12.5% chance of being in the correct state is due to the 8:1

counter.

Typical Performance Characteristics

BREAKDOWN vs. TEMPERATURE

1.1

1.0

0.9

-50 -25 0 25 50 75 100 125 150

Junction Temperature (°C)

CURRENT LIMIT vs. TEMPERATURE

1.2

1.0

0.8

0.6

0.4

0.2

0

-50 -25 0 25 50 75 100 125 150

Junction Temperature (°C)

FREQUENCY vs. TEMPERATURE

1.2

1.0

0.8

0.6

0.4

0.2

0

-50 -25 0 25 50 75 100 125 150

Junction Temperature (°C)

IC vs. DRAIN VOLTAGE

2

VC = 5 V

1.6

1.2

0.8

0.4

0

0

20 40 60 80 100

DRAIN Voltage (V)

13 A

8/97

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