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reference designLT8306/LT8309 | Demoboard ADPS43748-RD

Analog Devices LT8306/LT8309 | Demoboard ADPS43748-RD

20 W High-Efficiency Optocoupler-Free Flyback PSU for Solar Inverter Applications

Overview

TopologyFlyback Converter
Input voltage24-28 V
Output 15 V / 4 A
IC revisionB

Description

Simplify your isolated power for high-efficiency solar inverters with the ADPS43748-RD Industrial Power Solution. Discover a 20 W high-efficiency optocoupler-free flyback PSU (Power Supply Unit) optimized for solar inverter applications. With a no-optocoupler synchronous flyback architecture and four configurations based on output capacitors, this system-level power solutions is also flexible for different inverter requirements and can be used in various energy infrastructure applications.

Features

Uses a no‑optocoupler synchronous flyback design for higher reliability and fewer failure points.Provides four output‑capacitor configurations for easy design tuning.Delivers >90% efficiency under typical load conditions.Supports up to 4 A peak, ideal for inverter AUX and control‑rail power.Compact isolated form factor that simplifies integration into inverter control boards.Lowers BOM cost and design complexity for renewable‑energy systems.Integrates seamlessly into a solar inverter’s auxiliary supply, powering DSPs, MCUs, sensors, and gate drivers.

Typical applications

  • Industrial Power

More information

Products

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Tol. C
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IOut1(A)
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885012207120
SPECWCAP-CSGP MLCCs 100 V(DC), 4.7 nF, ±10%
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ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 100 V(DC)
Capacitance4.7 nF
Capacitance±10% 
Rated Voltage100 V (DC)
Operating Temperature -55 °C up to +125 °C
Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height0.8 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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Q-Factor [1]600 
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Size0805 
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750310617
SPECWE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748, –, –
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748
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Operating Temperature -40 °C up to +125 °C
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Length23.11 mm
Width29.08 mm
Height11.43 mm
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Input Voltage 9 - 36 V (DC)
Output Voltage 112 V
Output Current 13 A
Auxiliary Voltage12 V
Inductance4.5 µH
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Turns Ratio1:1.16:1.16 
Saturation Current14 A
Leakage Inductance0.15 µH
Insulation Test Voltage1875 V (AC)
SizeEFD20 
IC ReferenceLT3748 
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