Electrical characteristics

HVLED002

8/19

DocID028720 Rev 1

Figure 3. Open loop test circuit

High peak currents associated with capacitive loads necessitate careful grounding

techniques. Timing and bypass capacitors should be connected close to the pin 5 in a single

point ground. The transistor and 5 K

 potentiometer are used to sample the oscillator

waveform and apply an adjustable ramp to the pin 3.

A

2N2222

ERROR AMP.

ADJUST

ADJUST

COMP

1

2

3

4

7

6

5

8

OUTPUT

GROUND

0.1 μF

0.1 μF

OUTPUT

GROUND

1W

HVLED002

AM039820

Figure 4. Timing resistor vs. oscillator

frequency

Figure 5. Output deadtime vs. oscillator

frequency