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UNDET3120 B Lithium Battery Charging AC/DC Power Adapters — Desktop & Wall-Mount
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UNDET3120 B is a 120W lithium-ion battery charging AC/DC Power Adapters — Desktop & Wall-Mount. It features an IEC 320 C18 inlet type AC input and supports CCCV charging, making it suitable for charging batteries in small to medium-sized devices and various other equipment. Equipped with multiple protection circuits, this high-efficiency product also meets DOE Level VI standards. In terms of safety standards, it complies with technical requirements such as PSE and IEC62368-1. Product series name:UNDET3120 B Lithium Battery Charging AC/DC Power Adapters — Desktop & Wall-Mount |
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Products details
| Size | L:174.7 W:72.3 H:35.1/mm (IEC 320 C18) |
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| AC Input Rating | 90V~264V |
| DC Output Rating |
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| Safety |
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If you are looking for products other than the above specifications, please contact our sales department.
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The UNDE 120W B Series is a desktop-type AC/DC adapter (120W) compatible with lithium battery charging for E-bikes and charging equipment. Compliant with safety standard 62368-1 and PSE Appendix Table 8. Four models are available with outputs ranging from 13.6V to 54.6V, and two types are offered: UNDEC3120 B (C plug) and UNDET3120 B (T plug).
A safe and highly efficient charging design compatible with CC/CV charging mode, making it ideal for E-bikes and other lithium battery-powered charging equipment. Equipped with a power factor correction (PFC) circuit for excellent power quality. Complies with Energy Efficiency Level VI (ErP/DoE), EU Commission Regulation (EU) 2019/1782, and DOE 10 CFR Part 429 and 430. All models feature energy-saving design with no-load power consumption of 0.21W.
| UNIFIVE is chosen because: As a power supply manufacturer with over 35 years of development experience, we provide comprehensive support from specification review for mass production adoption to certification acquisition, production launch, and post-mass production follow-up. Based on standard products, we offer flexible supply from small-lot prototyping and evaluation to small and medium-scale production, as well as large-volume production according to your required quantity. We also support semi-custom solutions and assist with power supply selection from the specification planning stage for mass production adoption. |
Key Features
1) CC/CV charging mode support for E-bike lithium batteries
This desktop-type AC/DC adapter features a safe and highly efficient charging design compatible with CC (constant current) / CV (constant voltage) charging mode. It is optimized as a charging power supply for devices equipped with lithium batteries, including E-bikes and charging equipment. The safety standard complies with 62368-1 for ICT equipment and is also suitable for information and communication technology equipment and audio/video equipment. For details on certification status for each model, please contact our sales department.
2) High efficiency 88% design supporting safe charging
All four models achieve 88.00% efficiency with a high-efficiency design. Charging control via CC/CV mode prevents overcharging and supports safe charging of lithium batteries. The wide output voltage range of 13.6V to 54.6V accommodates lithium battery packs with various cell configurations.
3) Equipped with power factor correction (PFC) circuit
Power factor correction (PFC) circuit ensures a power factor of 0.9 or higher for both AC100V and AC230V inputs. It reduces the impact of harmonic currents on the power line and ensures stable power quality. For 120W-class chargers handling high power, it contributes to improving overall facility power efficiency.
4) EMC compliance for ICT equipment (CISPR 32, EN55035, BS EN55032, BS EN55035)
EMC standards comply with CE CISPR 32 EN55032, BS EN 55032 (Emission), EN 55035, and BS EN 55035 (Immunity) for ICT equipment. Also compliant with FCC Part15 Class B and VCCI Class B. Compliance with BS EN standards supports certification acquisition for the UK market Products.
5) 13.6V to 54.6V, four output models, two types available
Four output voltage models required for E-bike lithium battery charging are available: 13.6V, 27.2V, 42.0V, and 54.6V, supporting various lithium battery pack configurations. Compliant with Energy Efficiency Level VI (ErP/DoE), EU Commission Regulation (EU) 2019/1782, and DOE 10 CFR Part 429 and 430. Available in two types: UNDEC3120 B (C plug) and UNDET3120 B (T plug), both with dimensions of 174.70x72.30x35.10mm. Over-temperature protection (OTP) is available as an option.
Main Specifications
| Series Name | UNDE 120W B Series |
| Products Category | AC/DC Adapter for ITE and AV equipment (desktop type, compatible with lithium battery charging) |
| Rated Output | 120W |
| Key Features | Compatible with CC/CV charging mode, high-efficiency design, safe charging, PFC included |
| Main Applications | E-bike, lithium battery-equipped charging equipment |
| Operating Temperature Range | 0 to 40°C (natural air cooling, altitude) |
| Technical Standards (Safety) | 62368-1, PSE Appendix Table 8 (for details of each model, please contact our sales department) |
| Energy Efficiency | Energy Efficiency Level VI (ErP/DoE), compliant with EU Commission Regulation (EU) 2019/1782, compliant with DOE 10 CFR Part 429 and 430 |
| Power Factor (PFC) | 0.9 or higher (at AC100V and AC230V input) |
| Emission (Radiated) | FCC Part15 Class B / CE CISPR 32 EN55032 Class B / VCCI Class B / BS EN 55032 |
| Immunity | EN 55035 / BS EN 55035 |
| Protection Circuits | Short circuit protection / Overvoltage protection / Overcurrent protection / Over-temperature protection (optional) |
| Operating Environment | Input: AC100 to 240V (range: AC90 to 264V), 50/60Hz (range: 47 to 63Hz) / Storage temperature: -20 to 65°C (natural air cooling, altitude) / Operating and storage humidity: 5 to 95%RH (non-condensing) |
| Reference: Output Voltage, Current, Efficiency | 13.6V 8.8A (ripple 240mV, noise 240mV, efficiency 88.00%) / 27.2V 4.4A (ripple 360mV, noise 360mV, efficiency 88.00%) / 42.0V 3.0A (ripple 480mV, noise 480mV, efficiency 88.00%) / 54.6V 2.2A (ripple 480mV, noise 480mV, efficiency 88.00%) (output accuracy ±5%, no-load power consumption 0.21W) |
| Reference: Type and Dimensions | UNDEC3120 B (174.70x72.30x35.10mm), UNDET3120 B (174.70x72.30x35.10mm) |
| Other | RoHS 2 compliant |
Semi-Custom Support
Please feel free to contact us for specification confirmation, quotations, or sample inquiries. Examples of semi-custom support can be found on the Customization Case Studies page.