RDK-295

Reference design kit for a 20W standby power supply using TinySwitch™-4 TNY290PG. EcoSmart™ meets all existing and proposed harmonized energy efficiency standards including CECP (China), CEC, EPA, AGO and European commission. Tightly toleranced I2f parameter (–10%, +12%) reduces system cost, increases MOSFET and magnetics power delivery, reduces overload power which lowers output diode and capacitor costs. Integrated TinySwitch-4 safety/reliability features includes accurate (±5%), auto-recovering, hysteretic thermal shutdown function maintains safe PCB temperatures under all conditions, auto-restart protects against output short circuit and open loop fault conditions and <gt/>3.2 mm creepage on package enables reliable operation in high humidity and high pollution environments. Although designed as an auxiliary or bias supply for a personal computer (PC) power supply, this design can also be used as a general-purpose evaluation platform for TinySwitch-4 devices.

• 90VAC to 295VAC (110VDC to 420VDC) input and 5V, 4A output
• No-load consumption of <lt/>40mW at 230VAC
• <gt/>81% active-mode efficiency (exceeds standards requirement of 76%)
• BP/M capacitor value selects MOSFET current limit for greater design flexibility
• Meets EN550022 and CISPR-22 Class B conducted EMI
• Typically used in general PC applications
• Output overvoltage protection (OVP) using primary bias winding sensed shutdown feature

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.