The ultra-slim 22mm portable charger YN20WPD is a 21W PD3.0/QC4+ fast charging power adapter, whose core value lies in passing multiple international safety certifications, providing a fast and safe charging experience for devices such as mobile phones and tablets.
Technical Specifications
| Input Voltage | AC 100-240V 0.5A |
| Output Voltage | 5V 3A / 9V 2.25A / 12V 1.75A |
| Output Power | 21W Max |
| Product Dimensions | 46.5×39.2×22mm |
| Model Number | YN20WPD |
| Safety Certifications | 3C, CE, ETL, FCC |
| Operating Temperature | 0°C-40°C |
Product Features
- Ultra-Slim Portable Design: The body thickness is only 22mm, featuring a mirror finish appearance process with a prominent stylish texture, easily fitting into pockets or bags for convenient daily carrying and storage.
- Multi-Protocol Fast Charging Support: Compatible with mainstream fast charging protocols such as PD3.0, QC4+, AFC, FCP, SCP, intelligently identifies devices and automatically matches the optimal charging current, ensuring efficient and stable charging.
- Wide Device Compatibility: Suitable for smartphones, tablets, power banks, USB-C devices, as well as low-power devices like Bluetooth earphones and smartwatches, one charger for multiple uses.
- Multiple Safety Protections: Built-in overvoltage, overcurrent, short circuit, and over-temperature protection mechanisms, certified by multiple international safety standards including 3C, CE, ETL, FCC, providing greater peace of mind during use.
- Efficient and Stable Output: Maximum output power of 21W, supports multiple output levels of 5V 3A, 9V 2.25A, 12V 1.75A, meeting the charging needs of different devices.
Application Scenarios
- Consumer Electronics
Smartphones, tablets, laptops, gaming consoles, etc., for PD fast charging and regular charging, supporting PD3.0/QC4+/PPS full protocols. - Medical Equipment Power Supply
Patient monitors, ventilators, portable medical devices, ultra-low leakage current, certified to IEC EN60601 medical grade. - Industrial Control & LED Lighting
Industrial switches, industrial PCs, LED displays, security surveillance, wide voltage range 9-58VDC adjustable, adaptable to harsh grid environments. - Network Communication & IoT
Routers, switches, fiber optic terminals, IoT gateways, high-reliability uninterrupted power supply, certified by UL/CE/FCC.
Frequently Asked Questions
How to choose the right DC connector? What are the differences between different DC connector specifications?
Choosing a DC connector requires confirming three parameters: ① Outer Diameter (OD) × Inner Diameter (ID), common specifications include 5.5×2.5mm, 5.5×2.1mm, 3.5×1.35mm, etc.;
② Polarity — the vast majority of devices are center positive (inner positive, outer negative), a few special devices are center negative (inner negative, outer positive), please check the original adapter label of your device to confirm;
③ Rated Current — the DC connector's rated current must be ≥ the adapter's output current. This unit comes standard with a 5.5×2.5mm center positive DC connector, which can be replaced with other specifications as needed, simple replacement requires no tools.
What certifications does this power adapter have? Does it have UL/CE/FCC certificates?
This unit is certified by UL (US safety certification), CE (EU safety certification), FCC (US electromagnetic compatibility), with optional PSE (Japan), KC (South Korea), SAA (Australia), CCC (China Compulsory Certification) for some models. The UL certification number is traceable, and CE declaration documents are complete. For bulk purchases, a copy of the UL certification, CE declaration, and FCC test report can be provided simultaneously, ensuring smooth export customs clearance and customer factory audits. For overseas customers with special certification requirements, separate certification applications can be arranged.
Is this power adapter constant voltage output or adjustable output?
Determined by the model specification: Fixed voltage versions output the nominal voltage (e.g., 12V/24V), suitable for most standard devices; adjustable voltage versions allow output voltage adjustment within a specified range via a potentiometer knob (e.g., 9~48V adjustable), suitable for R&D testing and multi-device compatibility scenarios. Usage notes for adjustable versions: ① Disconnect the load before adjusting;
② Confirm the voltage matches the device after adjustment before powering on;
③ For long-term use, it is recommended to fix the knob position to prevent accidental changes. For batch applications, fixed voltage versions are recommended (more stable, lower cost).
What is the lifespan of this power adapter? Will long-term plugging damage it?
The design lifespan of this unit is ≥50,000 hours (MTTF, Mean Time To Failure), approximately 5.7 years of continuous operation under rated load and normal temperature. Long-term plugging will not damage the adapter. This unit complies with Level VI energy efficiency standards, with no-load power consumption<0.1W
Does this power adapter have protection functions? What happens during overcurrent or overvoltage?
This unit has built-in multiple safety protections: ① Overvoltage Protection (OVP) — automatically shuts down when the output voltage exceeds the set value (typically 110~120%) to prevent damage to downstream devices;
② Overcurrent Protection (OCP) — automatically limits current or shuts down when the output current exceeds the rated value;
③ Short Circuit Protection (SCP) — immediately shuts down when the output is short-circuited, automatically recovers after the short circuit is cleared;
④ Over-Temperature Protection (OTP) — reduces power or shuts down when the internal temperature exceeds 85°C, automatically recovers after cooling. After the fault is cleared, the adapter automatically restores power supply without manual restart.
What is the output ripple of this power adapter? Does it affect precision equipment?
The output ripple (Ripple & Noise) of this unit is ≤1% of the rated voltage (typical value), e.g., for a 12V model, ripple ≤120mVp-p. For applications sensitive to ripple, such as audio equipment, precision measuring instruments, and medical devices, it is recommended to choose models with lower ripple (≤50mVp-p) or add an LC filter circuit. Excessive ripple may cause audio background noise, measurement errors, abnormal device restarts, etc. Please contact Yina Technical Support to inform us of your application scenario for the most suitable model recommendation.
What is the difference between a medical-grade power adapter and a standard power adapter?
Medical-grade power adapters must comply with IEC EN60601 standards. Core differences: ① Leakage Current — standard adapters ≤0.5mA, medical-grade BF type ≤0.1mA (patient contact part);
② Isolation Voltage — standard adapters 2×MOPP (4000VAC), medical BF type must meet BF type application part requirements;
③ Insulation Grade — must meet double or reinforced insulation requirements;
④ Creepage Distance and Clearance — ≥8mm (BF type application). Medical equipment (monitors, ventilators, etc.) must use medical-grade adapters; standard adapters are prohibited for medical applications.
What is the polarity of this power adapter's connector? Center positive or center negative?
The default polarity of this unit's DC connector is center positive (inner positive, outer negative), which is the standard polarity for the vast majority of electronic devices. A few special devices (e.g., some communication equipment, guitar effects pedals) use center negative. Before use, please check the original adapter label or the polarity marking on the device body (usually marked with a "-○ +" symbol, where the dot indicates the center polarity). If the device requires center negative, Yina can provide a reverse polarity DC connector, or the customer can replace the wiring themselves (does not affect the warranty). Note: Incorrect polarity may cause device damage; please confirm the polarity is correct before first use.
What is the maximum output power of this power adapter? What load can it handle?
The maximum output power of this unit is determined by the model specification. When selecting adapter power, it is recommended to calculate the minimum adapter rated power as "Device Power ÷ 0.8" (i.e., P_adapter ≥ P_device ÷ 0.8). For example, if a device requires 200W, it is recommended to choose an adapter of 250W or higher. Choosing too small a power will cause the adapter to overheat and shorten its lifespan, while choosing too large a power will increase procurement costs and size.
What is the difference between a PD fast charging adapter and a standard adapter?
PD fast charger adapter supports the USB PD (Power Delivery) protocol. Core advantages: ① Intelligent voltage regulation — outputs multiple voltage levels such as 5V/9V/12V/15V/20V via USB-C interface, intelligently matching device requirements;
② Bidirectional power supply — supports both forward and reverse charging;
③ High power — supports up to 100W for PD3.0 and up to 240W for PD3.1;
④ Multi-device compatibility — one adapter works with phones, tablets, laptops, etc. Ordinary adapters output a fixed voltage (single voltage), suitable for powering a single device. If your device supports the PD protocol (such as iPhone, MacBook, iPad, etc.), it is recommended to choose a PD fast charger adapter.
What is the warranty period and after-sales service for this power adapter?
The standard warranty period for this unit is 2 years. Non-human damage within the warranty period is repaired or replaced free of charge. Domestic customers enjoy a 48-hour response and repair completion within 7 working days; overseas customers can arrange DHL/FedEx repair shipment or local agent warranty. Products beyond the warranty period are provided with paid repair services (cost approximately 30~50% of new product price). Lifetime technical support is provided (selection consultation, application solution design). Customers with annual framework agreements enjoy value-added services such as priority production scheduling, free samples, and factory inspection support. Bulk purchases (500 units or more) can apply for an extended warranty to 3 years.
What type of plug does this power adapter have? Can it be replaced?
The factory default plug type for this unit is selected based on the target market (US standard Type A/B, EU standard Type C/F, UK standard Type G, AU standard Type I, etc.). Multiple models support a replaceable plug design (modular plug), where one adapter can be equipped with plug modules for multiple countries for global use. To replace the plug, simply pull out the original plug module and insert the new one, no tools required. If your device needs to be sold in multiple countries, it is recommended to choose the replaceable plug version (for increased flexibility) or specify the plug type for the target market (for lower cost).
