A 15.7-V-Compliant 86% Peak Efficiency Current-Mode Stimulator With Dynamic Voltage Supply for Implantable Medical Devices
- Resource Type
- Conference
- Authors
- You, You; Tian, Ruizhi; Zhang, Yacong; Chen, Zhongjian; Lu, Wengao; Zhang, Yihan
- Source
- ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC) Solid State Circuits Conference (ESSCIRC), ESSCIRC 2023- IEEE 49th European. :321-324 Sep, 2023
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Photonics and Electrooptics
Signal Processing and Analysis
Integrated circuits
Voltage measurement
Medical devices
Current measurement
High-voltage techniques
Switches
Energy efficiency
electrical stimulation
high voltage
implantable medical device
dynamic voltage supply
DC-DC converter
- Language
- ISSN
- 2643-1319
This paper presents an energy-efficient 15.7-V-compliant current-mode stimulator with a proposed boost-based dynamic voltage supply that minimizes the stimulator’s voltage dropout. The boost uses a proposed 8-bit quantizer that measures the voltage ratio of its output to the input to digitally achieve the discontinuous conduction mode (DCM). A low-power high-voltage gate driver with a short switching transient time is proposed to improve energy efficiency. The converter achieves 90.2% peak efficiency, and up to 86% end-to-end energy efficiency is realized when a 6-mA biphasic stimulation is carried out. The stimulation IC is fabricated in 0.18 $\mu$m Bipolar-CMOS-DMOS (BCD) technology and occupies an area of 2.16 m$\mathrm{m}^{2}$. This stimulator consumes a low static power of 1.78 $\mu$W, promising battery-powered implants with a long lifetime and a small form factor.