Low-Noise Fixed Drop-Out ±2.5 to ±12-VOUT 3A Power Supply Reference Design for Ultrasound CW Pulser
Description
This reference design allows a digitally programmable power supply to power an ultrasound transmit circuit for continuous wave (CW) mode from a 24-V bus. There are two outputs adjustable from ±2.5 to ±12 V under user software control. These outputs can provide up to 2 A with very low ripple and noise on both positive and negative regulator outputs. The power supply is scalable for higher output currents up to 3 A by adding more regulators in parallel. The power supplies can also be synchronized to an external clock.
Features
- Separate and independent positive and negative voltage power supplies for CW mode in ultrasonicTo reduce ripple at output's high performance: low noise LDOs are operated as power filters to obtain lowest ripple with minimum heat dissipation in LDO (Comprises two high-performance buck regulators for creating adjustable outputsAdaptive drop on LDO: special circuit keeps LDO output always 1V below LDO inputCapable of switching frequency synchronization with ultrasound master or system clock frequency
Applications
- Ventilators
- Marine equipment
- Mother & neonatal care monitor
- Ultrasound smart probe
- CT & PET scanner
- Ultrasound scanner
- X-ray systems
Product Categories
- Power management