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Overview
| Topology | Buck Converter |
| Input voltage | 36-48 V |
| Output 1 | 47.5 V / 4 A |
| IC revision | A |
Description
The LM51770EVM-HV evaluation module (EVM) demonstrates a flexible high-power buck-boost design using the LM51770. The EVM is configured to operate from an input voltage range of 36V to 48V and produce a regulated 48V output with up to 4A load current. The EVM operates with a switching frequency of 380kHz. Most settings of the device are adjusted or set through jumpers, such as operation mode (PSM or fPWM), bias supply and external clock synchronization.
Features
Wide input voltage rangeUltra high (> 95%) peak power conversion efficiencyAdjustable output voltage using feedback resistor dividerOptional synchronization (SYNC)Easy configuration of current monitor or limiterProgrammable input undervoltage lockout (UVLO) threshold and hysteresisOutput constant voltage (CV) and constant current (CC) optionsSetting of configuration resistor RCFG through DIP switches
Typical applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Wire Type | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 22 µH, 34.95 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance22 µH | Performance Rated Current34.95 A | Saturation Current @ 10%15.5 A | Saturation Current @ 30%18 A | DC Resistance2.64 mΩ | Self Resonant Frequency9 MHz | Wire TypeFlat | – | – | MountSMT | Length27 mm | Height18.5 mm | Rated Current35 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | Pins2 | TypeStraight | MountTHT | Length5.08 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | Pins3 | TypeStraight | MountTHT | Length7.62 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | Pins5 | TypeStraight | MountTHT | Length12.7 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header - Single, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | – | – | – | – | – | – | – | Pins6 | TypeStraight | MountTHT | Length15.24 mm | – | Rated Current3 A | Working Voltage250 V (AC) | Operating Temperature -40 °C up to +105 °C |