ASML 4022.654.97872 LM 4C LPSA Power Supply

The ASML 4022.654.97872 is a laser module power supply assembly, designated LM 4C LPSA with reference SEM-I-576=9A38. This unit provides regulated DC power to solid-state laser modules used in ASML lithography systems. It features multiple isolated outputs with precise voltage and current control, ensuring stable laser diode operation and reliable system performance.

Electrical Specifications

• Part Number: 4022.654.97872

• Type: LM 4C LPSA (SEM-I-576 variant)

• Input Voltage: 200–240 V AC, 50/60 Hz, single phase

• Output Channels: 4 independent regulated outputs

• Channel 1: +5 V DC, 12 A

• Channel 2: +12 V DC, 6 A

• Channel 3: -12 V DC, 4 A

• Channel 4: +48 V DC, 10 A (pulsed)

• Line Regulation: ±0.05%

• Load Regulation: ±0.1%

• Ripple & Noise: < 3 mV RMS

• Efficiency: > 88%

• Protection: Overvoltage, overcurrent, overtemperature, short-circuit

• Cooling: Variable speed fan with temperature sensor

Functional Description

The 4022.654.97872 employs a high-frequency switching topology with active power factor correction (PFC) to minimize harmonic distortion. Each output is independently monitored by a microcontroller that adjusts the PWM duty cycle for precise regulation. The 48 V channel is optimized for driving laser diode arrays, with a peak current capability of 15 A for up to 1 ms. The unit communicates with the laser controller via an I²C bus, providing real-time telemetry including voltage, current, and internal temperature.

Installation and Wiring

Mount the power supply on a flat surface inside the equipment cabinet using the four M4 mounting holes. Ensure at least 60 mm clearance on the intake and exhaust sides for airflow. Connect the AC input through a filtered IEC inlet with a 10 A fuse. For DC outputs, use stranded copper wire of appropriate gauge – 12 AWG for the 48 V channel, 16 AWG for others. All output returns must be connected to the system common ground at a single point. After wiring, verify the absence of shorts and check the polarity before applying power.

Configuration and Monitoring

The power supply can be configured using DIP switches on the front panel to set the default output voltages or via the digital interface. The ASML Power Management Software allows remote adjustment of output voltages, monitoring of load currents, and viewing of fault logs. The software also provides a graphical trend display of key parameters. An audible alarm and a status relay contact are available for external fault indication.

Maintenance and Reliability

Regular maintenance includes cleaning the air filter and inspecting the fan for unusual noise. The electrolytic capacitors are rated for 10,000 hours at 40°C; replacement is recommended after 8 years of operation. The unit’s MTBF is calculated at 70,000 hours per MIL-HDBK-217F. In case of failure, the entire module is replaced; no user-serviceable parts are inside.

Integration with ASML Laser Systems

This power supply is specifically designed for ASML IR2-FIR and other solid-state laser modules. Its output characteristics match the pump diode and control electronics requirements. The I²C interface allows seamless integration with the laser’s main controller, enabling coordinated startup, shutdown, and fault handling.

Environmental and Safety

The 4022.654.97872 complies with EN 61010-1, UL 60950-1, and RoHS directives. It operates in ambient temperatures from 0°C to 50°C, with derating above 40°C. Humidity range is 20% to 80% non-condensing. The enclosure provides IP20 protection.

Technical Support and Documentation

ASML supplies a complete user manual, wiring diagram, and application notes. Certified service engineers can perform on-site verification of output performance. Spare fuse kits and fan replacement units are available through the ASML parts network.

Conclusion

The ASML 4022.654.97872 LM 4C LPSA Power Supply delivers stable, efficient, and reliable power for critical laser modules. Its robust design and comprehensive protection features ensure uninterrupted operation in demanding semiconductor fabrication environments.