Description:The iW1699 is a high-performance AC/DC controller designed to drive an external power N-channel MOSFET for peak current mode PWM flyback power supplies. It uses Renesas' PrimAccurate™ primary-side control technology, eliminating the need for a secondary-side regulator and optocoupler, reducing component count and solution cost while easily meeting the US DoE’s external power supply efficiency standard and the EU’s Code of Conduct, Version 5, Tier 2 external power supply standard, with no-load power consumpt
Renesas provides a recommended PCB layout and thermal design guide in their application note AN1844, which includes layout recommendations, thermal vias, and heat sink design guidelines.
The IW1699-02 has a built-in overcurrent protection feature. To implement it, refer to the datasheet section 7.3.1, which explains how to set the OCP (Overcurrent Protection) register. Additionally, you can use external components such as fuses or PTC thermistors for added protection.
The recommended power-up sequence is to first apply the input voltage (VIN) and then the input clock signal (CLKIN). This ensures proper initialization of the device. Refer to the datasheet section 7.2 for more details.
Renesas provides a troubleshooting guide in their application note AN1845. This guide covers common issues, error detection, and debugging techniques. Additionally, you can consult the datasheet and contact Renesas support for specific issues.
The recommended operating conditions are specified in the datasheet section 4. Refer to the 'Recommended Operating Conditions' table for details on voltage, current, and temperature ranges.
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IW1699-02 Overview
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