IR公司的IRS2573D 是全集成全保护600V HID灯控制集成电路，集成了点火时序控制，恒流灯功率控制，可编全桥运行频率，可编过压和欠压保护以及可编过流保护。器件还具有600V高边和低边全桥驱动器，600V高边降压驱动器，低边点火FET栅极驱动器。本文介绍了IRS2573D主要特性，方框图，典型应用电路图和70W HID镇流器主要特性，方框图，电路图，材料清单和PCB布局图。

The IRS2573D is a fully-integrated, fully-protected 600V HID control IC designed to drive all types of HID lamps. Internal circuitry provides control for ignition, warm-up, running and fault operating modes. 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.

IRS2573D主要特性：
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


图1。IRS2573D方框图

图2。IRS2573D典型应用电路图

70W HID镇流器

HID Ballast for 70W Lamp Using the IRS2573D
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.

70W HID镇流器主要特性：
Drives 1 x 70W HID lamp
Input voltage range: 185-265 VAC
High Power Factor/Low Total Harmonic Distortion
Controlled ignition
Low frequency square wave operation
Lamp power and current control
Open circuit and no-lamp protection
Short circuit and lamp failure to warm-up protection
Lamp end-of-life shutdown
IRS2573DSPbF HID Ballast Control IC


图3。70W HID镇流器外形图

图4。70W HID镇流器方框图

图4。70W HID镇流器电路图（1）

图5。70W HID镇流器电路图（2）

70W HID镇流器材料清单：



图6。70W HID镇流器PCB布局图