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5.85W Isolated Self-Driven Synchronous Inverting Fly-Buckboost with Optocoupler Reference Design
PMP30197
ACTIVE

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Technical Documents

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Key Document

PMP30197 Test Results (PDF 468 KB)
29 Jun 2017

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Description

The PMP30197 reference design is an inverting Fly-BuckBoost power supply using the LM2743 to generate an isolated output voltage of 3.9V. The design accepts an input voltage of 2V to 5.25V. The converter regulates the secondary side output with an optocoupler and is capable of achieving good output voltage regulation. The synchronous rectifier on the secondary output improves efficiency.

Features

Isolated output
Optocoupler regulated
Synchronous rectifier on the secondary winding improves efficiency
Test report available

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics

	PMP30197.1 (Output Voltage 1)
Vin (Min) (V)	2
Vin (Max) (V)	5.25
Vout (Nom) (V)	3.9
Iout (Max) (A)	1.5
Output Power (W)	5.85
Isolated/Non-Isolated	Isolated
Input Type	DC
Topology	Flybuck

TI Devices (3)

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Part Number	Name	Product Family	Sample & Buy	Design Kits & Evaluation Modules
LM2743	2.2-16V, Voltage Mode Synchronous Buck Controller with Tracking	Step-down (buck)	Sample & Buy	View Design Kits & Evaluation Modules
LMV431A	Low-Voltage (1.24V) Adjustable Precision Shunt Regulators	Voltage references	Sample & Buy	Not Available
LP2985-N	Micropower 150mA Low-Noise Ultra-Low-Dropout Regulator	Power management	Sample & Buy	View Design Kits & Evaluation Modules

CAD/CAE symbols

Part #	Package \| Pins	CAD File (.bxl)	STEP Model (.stp)
LM2743	TSSOP (PW) \| 14	Download	Download
LMV431A	SOT-23 (DBZ) \| 3	Download	Download
	TO-92 (LP) \| 3	Download	Download
	SOT-23 (DBV) \| 5		Download
LP2985-N	SOT-23 (DBV) \| 5	Download	Download

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Technical Documents

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User guides (1)

Title	Type	Size (KB)	Date
PMP30197 Test Results	PDF	468	29 Jun 2017

Design files (6)

Title	Type	Size (KB)	Date
PMP30197 Gerber	ZIP	97	29 Jun 2017
PMP30197 CAD Files	ZIP	451	29 Jun 2017
PMP30197 PCB	PDF	222	29 Jun 2017
PMP30197 Assembly Drawing	PDF	199	29 Jun 2017
PMP30197 BOM	PDF	105	29 Jun 2017
PMP30197 Schematic	PDF	186	29 Jun 2017

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