Linear Technology: DC1203A Demo Board for LTC4357 Ideal Diode Controller

atomar — Wed, 25 Jun 2014 00:52:47 GMT

Current Revision posted to Documents by atomar on 6/25/2014 12:52:47 AM

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Kit Overview

Demonstration Circuit 1203 ( DC1203ADC1203A ) showcases two LTC4357LTC4357s in a 48V , 5A Application. The Circuits are operational over a range of 9V to 75V and are fully independent, with the exception of a common ground. Input and output connections are made by 93 mil turrets which if removed, accommodate insertion of up to 12 guage wire for in-situ testing. Adequate copper is available for use up to 20A, with appropriate MOSFETs.

The DC1203ADC1203A Demonstration Circuit is built on a 2-layer board. The two ideal diode circuits are entirely independent, sharing only a common ground. Banana jacks are provided for supply and load connections; turrets facilitate connection of voltmeters and scope probes.

The LTC4357LTC4357 is a positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode. When used in diode-OR and high current diode applications, the LTC4357LTC4357 reduces power consumption, heat dissipation, voltage loss and PC board area.

The LTC4357LTC4357 easily ORs power sources to increase total system reliability. In diode-OR applications, the LTC4357 controls the forward voltage drop across the MOSFET to ensure smooth current transfer from one path to the other without oscillation. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients.

Key Applications: Servers, Routers, Switches, Mass Storage, Central Office Computing, Fan Trays, 12V Power Systems.

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Technical Documents

Learning Center

Type	Description
User Manual	LTC: Demo Manual for LTC4357 - Single Positive Voltage Ideal Diode - OR
Datasheet	LTC: Datasheet for LTC4357 - Positive High Voltage Ideal Diode Controller
Product Brief	LTC: Product Brief for Ideal Diode Controllers
Product Brief	LTC: Product Brief for High Voltage Ideal Diode-OR Controller Provides Higher Efficiency & Smooth Voltage Switchover without Oscillation
Product Brief	LTC: Product Brief for Wide Operating Range Ideal Diode Controller Provides Negative Input Protection & Low Current Operation
Whitepaper	LTC: White Paper for 9V to 80V Ideal Diode Reduces Heat Dissipation by Order of Magnitude over Schottky

Design Elements

Type	Description
Schematics	LTC: Schematic File for DC1203A
Layout	LTC: Layout File for DC1203A
BOM	LTC: BOM File for DC1203A

Video

Kit Features

Features of DC1203ADC1203A Demo Board:

Stuffed for 48V, 5A Applicaions
Operates 9-75V Without Modification
Demo Board Features Two Independent LTC4357LTC4357 Circuits
Dual Layout for S-8 or D2Pak MOSFETs
0.093-inch Turret Holes Accomodate 12 AWG Wire
Easily Modified for up to 20A

Features of LTC4357LTC4357:

Reduces Power Dissipation by Replacing a Power Schottky Diode with an N-Channel MOSFET
0.5μs Turn-Off Time Limits Peak Fault Current
Wide Operating Voltage Range: 9V to 80V
Smooth Switchover without Oscillation
No Reverse DC Current
Available in 6-Lead (2mm × 3mm) DFN and 8-Lead MSOP Packages

Kit Contents

The DC1203ADC1203A is supplied with below contents:

DC1203A Demo Board

Tags: demo_board, dc1203a, linear_technology, ltc4357