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UNDET3120 B Lithium battery charging AC/DC Power Adapter
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UNDET3120 B is a 120W lithium-ion battery charging AC/DC Power Adapter. It features an IEC 320 C18 inlet type for 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 the DOE Level VI standard. Regarding safety standards, it complies with technical standards such as PSE and IEC62368-1. Product series name:UNDET3120 B Lithium battery charging AC/DC Power Adapter |
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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) that supports lithium battery charging for E-bikes and charging equipment. It complies with safety standard 62368-1 and PSE Appendix Table 8. Four models are available with output voltages from 13.6V to 54.6V, and two types are offered: UNDEC3120 B (C plug) and UNDET3120 B (T plug).
Featuring a safe and highly efficient charging design compatible with CC/CV charging mode, it is ideal for E-bikes and other lithium battery-powered charging equipment. Equipped with a power factor correction (PFC) circuit for superior 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 an energy-saving design with no-load power consumption of 0.21W.
| UNIFIVE Reasons to Choose Us: As a power supply manufacturer with over 35 years of development experience, we provide comprehensive support from specification planning with mass production in mind, certification acquisition, mass production launch, to post-production follow-up. Based on our standard products, we offer flexible supply options from small-lot prototyping and evaluation to small- and medium-scale production, as well as large-volume manufacturing. We also support semi-custom solutions and assist with power supply selection from the specification planning stage toward mass production adoption. |
Key Features
1) Supports CC/CV Charging Mode - Lithium Battery Charging for E-bike Applications
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 lithium battery-powered devices including E-bikes and charging equipment. It complies with safety standard 62368-1 for ICT equipment and is suitable for information and communication technology equipment and audio-visual equipment. For details on certification status of each model, please contact our sales department.
2) High Efficiency 88% Design - Supports Safe Charging
All four models achieve high efficiency of 88.00%. Charging control via CC/CV mode prevents overcharging and supports safe lithium battery charging. 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
Equipped with a power factor correction (PFC) circuit, achieving 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. In 120W-class chargers that handle 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 and BS EN 55032 (emission), and EN 55035 and BS EN 55035 (immunity) for ICT equipment. Also compliant with FCC Part 15 Class B and VCCI Class B. Compliance with BS EN standards supports certification acquisition for products intended for the UK market.
5) 13.6V to 54.6V - Four Output Models - Two Types Available
Available in four output voltage models required for charging E-bike lithium batteries: 13.6V, 27.2V, 42.0V, and 54.6V, supporting various lithium battery pack configurations. Complies with Energy Efficiency Level VI (ErP/DoE), EU Commission Regulation (EU) 2019/1782, and DOE 10 CFR Part 429 and 430. Two types are available: 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 |
| Product Category | AC/DC Adapter for ITE and AV Equipment (Desktop Type, Supports Lithium Battery Charging) |
| Rated Output | 120W |
| Key Features | Supports CC/CV charging mode, high efficiency design, safe charging, PFC included |
| Main Applications | E-bike, lithium battery-powered charging equipment |
| Operating Temperature Range | 0 to 40C (natural convection 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), Complies with EU Commission Regulation (EU) 2019/1782, Complies with DOE 10 CFR Part 429 and 430 |
| Power Factor (PFC) | 0.9 or higher (at AC100V and AC230V input) |
| Emission | 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 65C (natural convection 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) |
| Others | RoHS 2 compliant |
Semi-Custom Support
Please feel free to contact us for specification confirmation, quotations, or sample requests. You can also review semi-custom support examples on our Customization Case Studies page.
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