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Analog Devices LTC3875 | Demoboard DC2142A
DC2142A - LTC3875EUJ/LTC3874IUFD Demo Board | 4.5V ≤ VIN ≤ 14V; VOUT: 1V @ 120A
Overview
| Topology | Buck Converter |
| Input voltage | 4.5-14 V |
| Output 1 | 1 V / 120 A |
| IC revision | A |
Description
Demonstration circuit 2142A is a high efficiency, high density, 4-phase synchronous buck converter with a 4.5V to 14V input range. It can supply 120A maximum load current at a 1.0V output. This demo board incorporatesthe LTC3875EUJ and LTC3874IUFD controllers.The LTC®3875 is a feature-rich dual phase synchronous buck controller with very low DCR current sensing capability, on-chip drivers and remote output voltage sensing.The LTC3874 is a compact dual phase synchronous buck phase extender with very low DCR current sensing capability, on-chip drivers and immediate response to master IC's fault.This board is setup with 0.32mΩ DCR inductor. The temperature compensation function guarantees accurate current limit over a wide temperature range with DCR sensing.The DC2142 can provide high efficiency, high power density and compact solutions for telecom and datacom systems,industrial and medical instruments, DC power distribution systems and computer systems. The LTC3875 is available in a 40-pin 6mm × 6mm QFN package. The LTC3874 isavailable in a 28-lead (4mm × 5mm) QFN Package.To shut down the converter, set the RUN pin voltage below 1.4V (SW1: OFF). Use the JP1 jumper to select burst mode, pulse skipping mode or forced continuous mode operation at light load. Switching frequency is preset atabout 400kHz, and it can be easily modified from 250kHz to 770kHz. An on-board dynamic circuit is also available for transient test. The LTC3875 and LTC3874 data sheets give a complete description of these parts, and must beread in conjunction with this DC2142A quick start guide
Features
Remarks:L1=L2=L3=L4=0.25uH &L5=3.3uHRefer page no.9
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(nH) | ISAT(A) | fres(MHz) | LR(nH) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | Material | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCM SMT High Current Flat Wire Inductor, 250 nH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCM SMT High Current Flat Wire Inductor | Inductance250 nH | – | Self Resonant Frequency33 MHz | Rated Inductance250 nH | Saturation Current @ 10%54.4 A | Saturation Current @ 30%64.7 A | DC Resistance0.32 mΩ | MaterialMnZn | Pins2 | – | MountSMT | Length11.3 mm | Height8.9 mm | Rated Current38 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WE-TPC SMT Tiny Power Inductor, 3300 nH, 1.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance3300 nH | Saturation Current1.8 A | Self Resonant Frequency80 MHz | – | – | – | – | – | Pins2 | – | MountSMT | Length4.8 mm | Height2.8 mm | Rated Current2.15 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | Pins2 | – | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | Pins3 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | Pins4 | TypeStraight | MountTHT | Length8 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |