Isolated power supply for Programmable Logic Controller (PLC) IO modules

The TIDA-00400 isolated power supply reference design provides multiple isolated outputs to supply the bias voltage needed in a Programmable Logic Controller (PLC) IO module. It generates 3 isolated outputs: ±15V@30mA and +5V@40mA. These voltage rails can satisfy most of the required voltage rails in the IO modules, such as the Op-Amp, DAC bias, RS-485 transmitter and digital isolator power supplies. 

Features
  •  Wide input voltage range: 18 to 30 V (24 VNOM)
  •  Non-Isolated output: 3.3V with 50mA
  •  Three isolated outputs:
     °  +15V with 30mA
     °  -15V with 30mA
     °  +5V with 40mA
  •  Small form factor for space constrained I/O cards 51 x 51 x 8 mm (L x W x H)
  •  Primary-side regulation (no need for optocoupler) increases lifetime reliability

Parts Include:

LM5017    7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator 
TPS709    150-mA, 30-V, Ultra-Low IQ, Wide Input Low-Dropout Regulator with Reverse Current Protection 
TPS7A30 Vin -3V to -36V, -200mA, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator
TPS7A47 36-V, 1-A, 4.17-μVRMS, RF LDO Voltage Regulator

Learn more by downloading the reference design below