DIODES AP3190T Evaluation Board User Guide

DIODES AP3190T Evaluation Board User Guide

Chapter 1 Summary

1.1 General Description

The 45W Evaluation Board (EVB) is composed of the controller AP3190T.
The AP3190T is a high performance offline PSR AC/DC power supply controller. It is specially designed for applications that require higher efficiency at light load and is cost effective.
Using the multi-mode control scheme, the AP3190T can also achieve high conversion efficiency with full load conditions. At heavy load and low line, the AP3190T will operate in QR mode to achieve high performance. When the load decreases, it will enter into fixed switching frequency operating mode. To optimize product performance, the fixed frequency is different in high (60kHz) and low line (80kHz).

1.2 Key Features

1.2.1 System Key Features

• Primary Side Control for Eliminating Opto-Coupler
• Low standby power (<65mW)
• Multiple QR/AM Mode to Improve Audio Noise and Efficiency

1.2.2 AP3190T Key Features

• Primary Side Control for Eliminating Opto-Coupler
• 65mW No-Load Input Power
• Adjustable Overtemperature Protection
• Multiple QR/AM Mode to Improve Audio Noise and Efficiency
• QR for Higher Efficiency and Better EMI
• Totally Lead-Free & Fully RoHS Compliant

1.3 Applications

• Power Tools
• Set-Top Box Power Supplies
• Network Adaptors

1.4 Main Power Specifications

1.5 Evaluation Board Picture

Chapter 2 Power Supply Specification

2.1 Specification and Test Results

Chapter 3 Schematics

3.1 Board Schematics

3.2 Bill of Material (BOM)

3.3 Transformer Design

3.4 Schematics Description

3.4.1 AC Input Circuit & Differential Filter

The Fuse F1 protects against overcurrent conditions which occur when some main components fail. The LF1 is a differential mode chock for the Differential mode noise suppression. The LF2 is a common mode chock for the common mode noise suppression. The BD1 is a bridge rectifier which converts alternating current and voltage into direct current and voltage.

3.4.2 AP3190T PWM Controller

The AP3190T is a high performance offline PSR AC/DC power supply controller. It is specially designed for applications that require higher efficiency at light load and is cost effective.

Chapter 4 The Evaluation Board (EVB) Layout

4.1 EVB PCB Layout

Chapter 5 Testing the Evaluation Board

5.1 Input & Output Characteristics

5.1.1 Input Standby Power

5.1.2 Output Full Load Efficiency at Different AC Line Input Voltage

5.1.3 Output Average Efficiency at Different Loading

5.2 Key Performance Waveforms

5.2.1 System Start-up Time

AP3190T 45W EVB User Guide

5.2.2 Q1/D4 MOSFET/Diode Voltage Stress at Full Load @264Vac

Primary side MOSFET: Q1
Secondary side diode: D4

5.2.3 System Output Ripple & Noise with the Cable

Connect 47µF AL Cap and 104MLCC to the cable output unit in parallel

5.2.4 Dynamic load —-10% Load~90% Load, T=20mS, Rate=100mA/µS

5.2.5 Thermal Testing

Note:

1. Component temperature can be further optimized with various system design and thermal management approaches by manufacturers.
2. The data has been revised according to the Ta=25C.

5.3 EMI (Conduction) Testing

Output Condition : 22.5V/2A

IMPORTANT NOTICE

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AP3190T 45W EVB User Guide

www.didoes.com

February 2024
© 2024 Copyright Diodes Incorporated. All Rights Reserved

References

• didoes.com

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