Power supply device

A switching power supply is a power solution that utilizes high-frequency switching technology to achieve efficient power conversion.

Unlike traditional linear power supplies, it does not operate the regulator transistor in the linear region. Instead, it alternately switches the power switching transistor between saturated conduction (with nearly zero resistance) and complete cutoff (with nearly zero current).

The core advantages of switching power supplies include high efficiency (typically 80%-90% or higher), small size and light weight (eliminating bulky line-frequency transformers), and a wide input voltage range (e.g., 85V-264V for global compatibility). The main disadvantages are relatively high output ripple and noise, more complex circuitry, and the generation of some electromagnetic interference. ☷ Product Description

Compliant with Level VI energy efficiency standards, the 9V1A/12V1A/15.5V1A/9V2.5A switching adapters, featuring stringent energy efficiency control and stable output characteristics, are widely used in consumer electronics, security surveillance, and other fields.

Common Core Features

(I) Energy Efficiency & Power Consumption Control

The Level VI energy efficiency standard (US DoE VI and EU CoC V5) imposes strict requirements on the adapter's efficiency across all load ranges and its no-load power consumption: The average efficiency must reach 89% or higher (for output voltage >5V and power ≤49W products). For example, a 12V1A adapter achieves efficiency ≥85% at 115V/230Vac input and no-load power consumption <0.1W.

Key technologies for achieving this specification include: Topology optimization: Using Quasi-Resonant (QR) mode to reduce switching losses under high load, combined with Frequency Foldback (FFM) and Burst Mode for light load and no-load scenarios; Component upgrades: Using low quiescent current controllers and synchronous rectification technology to reduce conduction losses; Circuit optimization: Streamlining peripheral designs (e.g., omitting optocouplers and TL431), using frequency jittering to improve EMI characteristics while reducing auxiliary circuit power consumption.

(II) Electrical Performance & Reliability

Wide Input & Stable Output: Covers a wide AC input range for global grid compatibility; Output voltage regulation ±3% to ±5%, ripple voltage <120mV (e.g., 12V1A adapter no-load ripple <120mV@90Vac), ensuring stable operation of sensitive equipment;

Multiple Protection Mechanisms: Built-in overvoltage, overcurrent, short-circuit, and overtemperature protection. Some models (e.g., 9V1A) also feature anti-inrush current and anti-electromagnetic interference capabilities, complying with FCC CLASS B/EN55022 CLASS B electromagnetic compatibility standards;

Durable Design: 94V-0 flame-retardant plastic housing, insulation withstand voltage between primary and secondary sides up to 3000VAC, operating temperature range -25℃ to +40℃, MTBF (Mean Time Between Failures) exceeding 30,000 hours (under full load at 25℃).

(III) Versatility & Compliance

Interface & Specification Customization: DC connector specifications support 5.5X2.1mm, 3.5X1.35mm, and other sizes; cable length customizable (0.5-2m); compatible with European, American, British, and other regional plug standards;

Some models are certified by UL, FCC, RoHS, etc., and comply with UL1310 safety standards (UL File No. E310452)

Note: x = 1, 2, 5 or 6， y = 1, 2, 4, 5 or 6

☷ Product Advantages

▶ High Efficiency & Energy Saving, Reduced Operating Costs: Up to 95% conversion efficiency significantly reduces energy loss and heat dissipation requirements. Long-term operation can save customers considerable electricity costs, aligning with green and eco-friendly concepts.

▶ High Power Density, Space Saving Installation: Compared to traditional linear power supplies, size and weight are greatly reduced (up to 60% or more), making it particularly suitable for space-constrained compact control cabinets and internal device integration.

▶ Excellent Stability & Reliability: Wide input voltage design adapts to unstable grid fluctuations. Full protection circuit design and industrial-grade component selection ensure 24/7 continuous stable operation in harsh environments, with a long Mean Time Between Failures (MTBF).

▶ Outstanding Electromagnetic Compatibility (EMC): Built-in EMI filter circuit effectively suppresses conducted and radiated interference to the grid, while possessing good anti-interference capability, ensuring stable operation of itself and surrounding equipment, easily passing various certifications.

▶ Intelligence & Convenience: Some models support remote control, digital voltage regulation (PWM/Vcontrol), parallel current sharing, and other functions, and provide LED status indicators for easy system integration and status monitoring. DIN rail mounting design for convenience and efficiency.

☷ Application Scenarios

(I) Consumer Electronics & Network Equipment

▶ 9V1A/12V1A Adapters: Suitable for routers, fiber optic modems, switches, TV boxes and other network equipment, as well as LED desk lamps, digital photo frames, and other small appliances, ensuring signal stability with low ripple and high anti-interference;

▶ 15.5V1A Adapter: Mostly used for customized equipment (e.g., specific models of scanners, electronic keyboards), meeting dedicated power supply needs with special voltage output.

(II) Access Control & Security Systems

▶ 9V2.5A Adapter: Powers security cameras, access control systems, and small control equipment. 22.5W power supports device night vision functions and data transmission, while Level VI energy efficiency reduces long-term operating costs;

▶ 12V1A Adapter: Enhances safety through a Y-capacitor-free design, suitable for access control readers, small alarm panels, and other security terminals.

▶ 12V40VA/25V40VA: Powers single or double door access control electric locks (magnetic locks, electric bolt locks). The 12V40VA model can simultaneously drive 3-4 standard 12V electric locks, with delay function for synchronizing access control and door opening signals.

▶ 34V40VA/36V40VA: Suitable for high-voltage electromagnetic locks or explosion-proof access control equipment, commonly used in chemical, mining, and other special scenarios.

(III) Other Scenarios

▶ Medical auxiliary equipment (e.g., small monitors), portable instruments (e.g., miniature projectors), and other devices requiring high power consumption and stability also often use this series of adapters. Their wide operating temperature range (-25℃ to +40℃) allows adaptation to complex environments.