Analog Devices LT8301ES5 | Demoboard DC2138A

Description

Demonstration circuit 2138A is an isolated flyback converter featuring the LT8301. This demo circuit outputs 5V from a 10V to 32V input, with a nominal of 24V. The output current capability increases with the input voltage. The standby input current of the demo circuit is less than950μA (typical) at VIN = 24V.The Performance Summary table summarizes the performance of the demo board at room temperature. The demo circuit can be easily modified for different applications with some pre-designed transformers.The DC2138A needs a very small minimum load (~6mA) to regulate the output voltage, thanks to the accurate current limit capability and ultralow switching frequency of LT8301 at very light load. On the board, a Zener diode is placed on the output to clamp the voltage to ~5V. ThisZener is optional, and can be replaced with a 0.8k resistor.The LT8301 is a simple-to-use high-voltage monolithic isolated flyback converter. No third winding or opto-isolator is required for regulation. The part sets the isolated output voltage with a single external resistor and integrates loop compensation and soft-start circuitry inside the IC. Boundary mode operation provides a small magnetic solution with improved load regulation. Low-ripple Burst Mode® operation maintains high efficiency at light loads while minimizing the output voltage ripple. A 1.2A, 65V DMOS power switch is integrated along with all high-voltage circuitry and control logic into a 5-lead ThinSOT™ package.The LT8301 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 2138A.

Features

Remarks:L1 (OPT)=10uHRefer pageno.4

More information

• Datasheet
• IC product information