70W HID lamp reference technology based on IRS2573D design - Power Circuit - Circuit Diagram

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The IRS2573D is a fully integrated, fully protected 600V xenon lamp (HID) controller that can drive all types of xenon lamp (HID) lamps. The IRS2573D includes ignition time control, constant lamp power control, programmable full bridge operating frequency, programmable overvoltage and Undervoltage protection and programmable overcurrent protection. In addition, the device integrates 600V high-side and low-side full-bridge drivers, as well as 600V high-side buck drivers. This article describes the main features of the IRS2573D, functional block diagrams, and typical application circuits and 70W. HID lamp reference design circuit diagram, main indicators, bill of materials and PCB layout.

The IRS2573D is a fully-integrated, fully-protected 600V HID control IC designed to drive all types of HID lamps.

The IRS2573D features include ignition timing control, constant lamp power control, programmable full-bridge running frequency, programmable over and under-voltage protection and programmable over-current protection. Advanced protection features such as failure of a lamp to ignite, open load, short-circuit and a programmable fault counter have also been included in the design.

Main features of IRS2573D:

Buck, full-bridge and lamp control in one IC

Continuous/critical-conduction mode buck control

600V high and low-side full-bridge driver

600V high-side buck Driver

Low-side ignition FET gate driver

Integrated bootstrap FETs for full-bridge high-side drivers

Constant lamp power control

Programmable buck cycle-by-cycle over-current protection

Programmable buck output voltage limitation

Programmable lamp current limitation

Programmable full-bridge frequency

Fault latch reset input

Programmable ignition counter (21sec/64sec typical)

Programmable lamp under-voltage fault counter (197sec typical) for short-circuit or lamp does not warm-up

Fast transient lamp under-voltage event counter (16384 typical) for arc instability or end-of-life

Programmable lamp over-voltage fault counter (787sec typical) for open-circuit or lamp extinguishes

Programmable good fault reset counter (2730sec typical)

Micro-controller compatible timing thresholds

Internal 15.6V zener clamp diode on VCC

Micropower startup (150μA)

Latch immunity and ESD protection on all pins


Figure 1. Functional block diagram of the IRS2573D

Figure 2. Typical application circuit diagram of IRS2573D

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