Lenovo Surveillance Power Supply Teardown Analysis252

Introduction

The power supply is the heart of any surveillance system, providing the necessary electrical power to operate cameras, recorders, and other devices. In this article, we will take a detailed look at the Lenovo Surveillance Power Supply, model P/N: 01YU029, and explore its design, components, and performance characteristics.

Physical Overview

The Lenovo Surveillance Power Supply is a compact and lightweight device, measuring approximately 210 x 120 x 40 mm (8.27 x 4.72 x 1.57 inches). It features a rugged metal enclosure with ventilation slots for efficient heat dissipation. The front panel houses the AC power input connector, a power switch, and an LED indicator for power status.

Internal Components

To gain access to the internal components, the power supply enclosure can be opened using the screws on the back panel. Inside, the power supply is meticulously organized, with clear labeling for each component and wire connection.

AC Input Circuit

The AC input section of the power supply consists of a fuse, a surge protector (MOV), and an EMI filter. These components protect the power supply from overvoltage transients and electromagnetic interference.

Primary Side

The primary side of the power supply features a full-bridge rectifier, which converts the incoming AC power to DC power. This DC power is then filtered by electrolytic capacitors and fed into a switching MOSFET, which operates at a high frequency to regulate the output voltage.

Transformer

The transformer is a crucial component of the power supply, providing electrical isolation and voltage conversion. It consists of two windings: a primary winding connected to the switching MOSFET and a secondary winding connected to the output circuit.

Secondary Side

The secondary side of the power supply includes multiple output rails, each providing a different voltage level. The main output rail is 12V, while the auxiliary rails provide 5V, 3.3V, and 1.8V. These output voltages are further regulated using linear regulators and capacitors.

Protection Circuitry

The Lenovo Surveillance Power Supply incorporates several protection circuits to ensure safe and reliable operation. These include overvoltage protection, overcurrent protection, short-circuit protection, and overtemperature protection.

Performance Characteristics

The Lenovo Surveillance Power Supply is designed to provide stable and reliable power for surveillance applications. It offers the following performance characteristics:

• Output voltage regulation: ±5%

• Output current capacity: 20A (12V)

• Efficiency: >85%

• MTBF: >50,000 hours

Conclusion

The Lenovo Surveillance Power Supply is a well-designed and reliable power solution for surveillance systems. It provides multiple output voltages, high efficiency, and robust protection circuitry. The detailed teardown analysis presented in this article provides insights into its internal components and performance characteristics, ensuring that end-users can make informed decisions when selecting a power supply for their surveillance infrastructure.

2025-02-24

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