AC-DC Step-down Supply
Product Overview:
LCX Power-YAJ AC-DC step-down power supply is a dedicated step-down rectifier power supply for communication base stations and off-grid no-power remote areas.
It adopts PFC front-stage plus isolated step-down two-stage conversion architecture and full-digital DSP closed-loop control.
It accepts wide-range fluctuating AC input and converts it into stable low-voltage adjustable DC output for telecom loads and backup battery packs.
Modular design supports parallel redundancy expansion with active current sharing.
It can work with photovoltaic, generator and battery energy-storage systems.
Featuring high power factor, low harmonic, high efficiency and strong environmental adaptability, it provides reliable low-voltage DC power guarantee for 4G/5G base stations and various field monitoring terminals.
Typical Applications：
· 4G / 5G remote communication base station,48V telecom equipment power supply
· Off-grid no-power mountainous, pastoral area communication station power supply
· Meteorology, hydrology, environmental monitoring field terminal DC power supply
· Border outposts, oil-gas field unattended monitoring equipment power supply
· Micro-grid supporting rectifier for communication and monitoring loads
· Distributed photovoltaic hybrid power-supply system supporting DC power unit
Technical Specifications：
1.Conversion Topology & Control
Two stage conversion with active PFC + isolated step down topology, full digital DSP closed loop control. Modular power unit, multi module parallel redundancy with active current sharing function.
2.Electrical Performance
Wide AC input range, adapt to severe AC voltage fluctuation of remote sites
Step down DC output, adjustable low voltage DC (typical 24V /48V for telecom)
Power factor ≥0.99, input current low harmonic distortion
Voltage setting accuracy ≤±0.5%FS, output ripple coefficient ≤0.8%
Max conversion efficiency ≥96.5%
Fast dynamic response, restrain output fluctuation under input and load step change
3.Multiple Working Modes & Battery Management
Support constant voltage, constant current, constant power operation modes. Built in intelligent charging logic, compatible with lithium ion, sodium ion, lead acid batteries, realize float charge and equalizing charge for backup battery bank. Support battery low voltage disconnection protection.
4.Complete Multi level Protection
AC input over voltage / under voltage, phase loss, surge protection; DC output over voltage, over current, short circuit, over temperature, reverse connection protection. Fault latch off, fault event recording function, protect telecom loads and battery packs.
5.HMI & Communication Interface
Color touch screen HMI with Chinese English bilingual. Real time display of AC input, DC output voltage/current/power, battery status and alarm information. Standard RS485, Ethernet, Modbus protocol. Support remote monitoring, parameter setting and data uploading for unattended field sites.
6.Cooling & Environmental Adaptability
Intelligent temperature controlled air cooling; optional outdoor cabinet version with higher protection grade. Operating temperature: 20℃ ~ +55℃. Dust proof, moisture proof and anti surge design, adapt to mountain, pastoral and other harsh field working conditions.
Technical Parameters and Selection
Technical Parameters and Selection
