Datasheet

Recommended Test Equipment

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5 Recommended Test Equipment

5.1 Voltage Sources

• 500-V DC Source Capable of 150 W

• 0-V to 20-V DC Power Supply Capable of 2 W

5.2 Volt Meters

• Two Volt Meters

• Five Current Meters

5.3 Square Wave Generator

• Capable of generating a 270-Hz to 330-Hz square wave with a 0-V to 5-V signal.

• Capable of duty cycles from 1% to 100% (DC).

5.4 Network Analyzer

• Needed to measure voltage loop stability if interested.

5.5 Output Loads

This EVM was design to power LED diode loads only, for proper operation it is recommend that LED

diodes be used. Please refer to Figure 3 and Figure 4 for example test setups.

• The EVM feedback circuitry was designed based on an LED load. If another load is used the feedback

circuitry will not operate correctly and the EVM will not function properly.

• It is recommended that 32 LEDs be used on each output as a load with the following characteristics.

– Capable of handling 275 mA.

– With a V

≈ 3.06 V at 250 mA.

– Note that different diodes with a different V

can be used as long as the total voltage drop across

the output is 98 V +/- 2 V at 250 mA.

• Note to evaluate performance and save on the number of diodes used. All four outputs can be used in

parallel to power one string of LEDs.

– Capable of handling 1.1 A

– With a V

≈ 3.06 V at 1 A

– Note that different diodes with a different V

can be used as long as the total voltage drop across

the output is 98 V +/- 2 V at 1 A.

5.6 Oscilloscope

• 4-Channel, 100 MHz

• Probes Capable of 500 V or Differential Probes

5.7 Recommended Wire Gauge

• 20 AWG

98-W Resonant LLC, 4-String LED Driver SLUU487A–March 2011–Revised March 2011

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