We have developed a plus/minus power supply reference board that is ideal for high-precision analog circuits used in audio equipment and industrial equipment.
When performing high-precision analog processing in systems equipped with audio equipment, PLCs, and sensors, operational amplifiers that require plus and minus power supplies are required to ensure dynamic range. In that case, ±5V, ±12V, ±15V, etc. are required, so the power supply circuit may become large and complicated.
This reference board uses a power supply controller IC (type: LT8471) from Analog Devices to design two power supplies, plus and minus. This makes the power supply for analog very compact. In addition, since this reference circuit supports step-down/step-up/step-down/step-down operation, it can handle a wide range of input voltages and can be used as a positive/negative power supply for operational amplifiers.
Features
- Features of the LT8471
Built-in dual 2A and single 0.5A/50V power switches
・Can generate both positive and negative outputs from a single input voltage
・Multi-topologies such as buck, boost, SEPIC, ZETA, flyback, and inversion enable 2-channel configuration
・Switching frequency can be set from 100kHz to 2MHz
・Reduce input ripple by reverse phase switching
Product Specifications
For output voltage ±12V
| input voltage | 6 to 36V |
| output voltage | ±12V |
| output current | 1.1A (at 36V input) |
For output voltage ±15V
| input voltage | 4.5 to 26.4V |
| output voltage | ±15V |
| output current | 800mA (at 26.4V input) |