Reference Design for 3.3V Input, 12V (15V) Output Isolated Power Supply
Manufactured By:Maxim Integrated
Part Number:MAXREFDES8
The Riverside design (MAXREFDES8#) uses an H-bridge transformerdriver (MAX256) and a low dropout (LDO) linear regulator (MAX1659) to create a 12V (15V) output isolated power supply from a 3.3V voltage input. This general-purpose power solution can be used in many different types of isolated power applications.
The Riverside subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo® Electronics. The transformer secondary side is connected to a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage below 16.1V.
Applications:
The Riverside subsystem reference design operates from a 3.3V DC power source. The MAX256 H-bridge transformer driver switches at approximately 475kHz and drives the primary side of the 1:2.6 turns ratio, with the use of a TGM-H281NF transformer from Halo® Electronics. The transformer secondary side is connected to a voltage doubler that rectifies the AC output into DC output. The MAX1659 LDO regulates the voltage to 12V. The Zener diode D3 protects the LDO by keeping its input voltage below 16.1V.
Applications:
- Industrial sensors
- Process control
- Industrial automation
- Medical
Features
- Isolated power
- 12V (15V) output
- Small printed circuit board (PCB) area
- Pmod™-compatible form factor
Ships With
- Board