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2. Overview

The IRPLHID2 reference design kit consists of a complete ballast solution for a 70W HID

lamp. The design contains an EMI filter, low voltage power supply, active power factor

correction and a ballast control circuit using the IRS2573D. This demo board is intended

to help with the evaluation of the IRS2573D HID ballast control IC, demonstrate PCB

layout techniques and serve as an aid in the development of production ballasts using

the IRS2573D.

EMI Filter

Rectifier

Active PFC

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Control IC

Buck

Ignition

Switch

EOL Control

Ignition Control

Power/Current

Control

Full-Bridge

Control

Buck Control

Low

Voltage

Supply

Full-Bridge

Figure 2.1: IRPLHID2 Block Diagram