AC-DC PSU for Server and Telecom

Key Features

• Fully electronic solution without the need for an inrush current limiter resistor and its bulky bypass electromechanical relay
• DC bus disconnection at standby to reduce losses below 0.3 W
• Inrush current compliance with IEC61000-3-3
• Operation allowed with PFC (continuous or discontinuous)
• Compliant with EN 55015, IEC 61000-4-11
• Criteria A at 4 kV IEC 61000-4-5 and at 4 kV IEC 61000-4-4
• RoHS compliant

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Key Features

• Digital controller: STNRG388A
• 3-phase interleaved DC/DC architecture
• Full load power: 1000 W (scalable up to 3 kW)
• Efficiency: more than 94% from 10% to full load
• Peak efficiency: 96.5% at full load
• Stand-by consumption: 425 mW
• Input voltage range: 350 ÷ 420 V dc
• CC/CV output regulation
• Output voltage regulation: 133 V
• Output current regulation: 7.5 A
• Maximum output current for each phase: 2.5 A
• Modular power and control board

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Key Features

• Input AC voltage: 90 V to 264 V
• Input AC frequency: 45 Hz to 65 Hz
• Nominal power: 500 W
• Output voltage: 12 V
• Semi-Bridgeless PFC stage
• DC-DC stage: resonant LLC with synchronous rectification
• Peak efficiency: 94%
• PFC switching frequency: 60 kHz
• DC-DC switching frequency: 80 kHz to 115 kHz (burst mode above)
• HF transformer isolation voltage: 4 kV
• Cooling: natural convection up to 300 W, forced cooling above 300 W
• PFC control: managed by STM32F051K8
• LLC control: managed by STM32F334C8
• Input short-circuit protection
• Input under/overvoltage protection
• Input under/overfrequency protection
• DC Bus under/overvoltage protection
• Output short-circuit protection
• Output under/overvoltage protection
• Overtemperature protection
• RoHS compliant

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Key Features

• Input AC voltage: 90 V to 264 V
• Output voltage: 48 V or 52 V, Max output current: 42 A
• Input AC frequency: 45 Hz to 65 Hz
• Nominal output power: 2 kW
• Interleaved PFC stage
• PFC switching frequency: 60 kHz
• PFC Average current mode control
• Cycle by cycle PFC current control
• Maximum power factor: 0.99
• DC-DC stage: full-bridge phase-shifted ZVS with synchronous rectification
• DC-DC switching frequency: 100 kHz
• Overall efficiency: 80 PLUS Platinum level
• HF transformer isolation voltage: 4 kV
• Forced cooling with air flow speed modulation according to the output power
• Over-temperature protection
• Output short-circuit protection
• PFC control & DC-DC control: managed by STM32F334C8
• PFC power stage based on MDmesh M2 Power MOSFETs and SiC Diodes
• DC-DC power stage based on MDmesh DM2 Power MOSFETs
• Synchronous rectification based on STripFET Power MOSFETs
• Active clamp circuit based on MDmesh DM2 Power MOSFETs
• EMC filter for noise reduction
• RoHS compliant

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Key Features

• Input voltage from 8 to 48 V
• Peak output current up to 6 A
• Enable/Disable/Fault flag pin
• Adjustable undervoltage lockout
• Adjustable output voltage clamp
• Programmable V_OUT slew rate control
• Latch or auto-retry jumper-programmable thermal protection
• Power good monitoring flag
• Drives an optional external reverse current protection MOSFET
• CE certified
• RoHS and China RoHS compliant
• WEEE compliant (2012/19/UE RAEE II)

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Key Features

• Input voltage range: 90 to 265 V_AC
• Line frequency range: 47 to 63 Hz
• Maximum output power: 3 kW at 230 V
• Output voltage: 400 V
• Power factor: > 0.98 at 20% load
• Total Harmonic Distortion: <5% at 20% load
• Mixed-signal average current mode control, CCM fixed frequency operation
• Switching Frequency: 111 kHz
• Cycle-by-cycle regulation (analog current control loop)
• Input voltage and load feed-forwards
• Phase shedding
• Burst-mode operation
• Overvoltage protection
• Thermal protection
• Status indicator LEDs
• Inrush current limiter function
• Cooling function

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Key Features

• Two high-temperature thyristors (SCR) in D²PAK package to bypass the inrush resistor
• Compact SMD solution: 26 x 26 mm (≈ 1 sq. in)
• Simple drive circuit: 2 low voltage transistors and 7 resistors (no MCU)
• Requires an unregulated power supply (12 V typ.; created from a secondary winding)
• Compatible with PFC and fly-back converter
• Suitable for applications from 50 W up to 800 W (230 V_RMS , T_AMB  = 60 °C)
• Input voltage range: 90-265 V_AC , 50/60 Hz
• Robust and immune (2 kV IEC 61000-4-5, 2.5 kV IEC 61000-4-4) and low EMI noise (EN55014) solution
• RoHS compliant

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Key Features

• Power ratings:
  • input DC voltage: 375 V to 425 V
  • output voltage: 48 V
  • maximum output current: 62.5 A
  • output power: 3 kW
  • peak efficiency: 95.3%
  • HF transformer isolation voltage: 4 kV
• Resonant and switching frequencies:
  • max DC-DC switching frequency: 380 kHz (at startup)
  • closed loop switching frequency: 120 kHz to 250 kHz
  • resonant frequency: 175 kHz
• Protection mechanisms:
  • undervoltage and overvoltage protection on input and output
  • overtemperature protection
  • short-circuit protection
  • forced cooling with air flow speed modulation according to the output power and temperature
• Efficiency:
  • adaptive synchronous rectification
  • light load burst mode
• Digital control with STM32F334 microcontroller

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Key Features

• 97.5 % efficiency at full load
• Max. 5 % THD at 10 % of full load
• Compact PFC converter
• Higher switching lifetime
• Compliant with EMI norms at 4kV
• RoHS compliant
• WEEE compliant

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