31.7 A 3.6W 16V-Output 180ns-Response-Time 94%-Efficiency SC Sigma Converter with Output Impedance Compensation and Ripple Mitigation for LiDAR Driver Applications

Chen Hu1; Xinran Huang1; Xun Liu2; Sijun Du3; Xiaosen Liu4; Junmin Jiang1

10.1109/ISSCC49657.2024.10454359

2024-02-22

0193-6530

979-8-3503-0621-7

2024 IEEE International Solid-State Circuits Conference (ISSCC)

67

18-22 Feb. 2024

San Francisco, CA, USA

The rapid adoption of light detection and ranging (LiDAR) technology, driven by emerging applications such as autonomous driving and 3D sensing and mapping, has resulted in a significant surge in market growth. In typical LiDAR receivers, photodiodes detect incoming photons and simultaneously generate substantial current that translates into voltage signals. To minimize the detection intervals, photodiode voltage supply must recover rapidly from current transient events. Maintaining a high voltage with minimal ripple is also crucial for enhancing sensitivity and signal-to-noise ratio (SNR). To address these requirements in battery or USB-powered systems, a step-up DC-DC converter with high voltage (HV) (>15V), fast transient response (hundreds of ns), high efficiency and power density is in high demand. While traditional switched-capacitor (SC) converters [1, 2] generate high voltage only using capacitors, their efficiency is low in close-loop and the load response is limited by the switching frequency. Such converters also exhibit inadequate voltage accuracy during heavy loads. Hybrid boost converters [3, 4], on the other hand, usually have lower loop bandwidth due to the right-half-plane (RHP) zero, which result in even slower transient speed. Also, the power density is constrained by bulky inductors. In [5], an SC converter cascading a post-regulator is used for accurate voltage regulation. However, the regulator is designed with HV devices in the HV domain, so curtails the bandwidth and constrains load transient speed.

第一

EI

1.Southern University of Science and Technology, Shenzhen, China
2.Chinese University of Hong Kong, Shenzhen, China
3.Delft University of Technology, Delft, The Netherlands
4.Tsinghua University, Beijing, China

Chen Hu,Xinran Huang,Xun Liu,et al. 31.7 A 3.6W 16V-Output 180ns-Response-Time 94%-Efficiency SC Sigma Converter with Output Impedance Compensation and Ripple Mitigation for LiDAR Driver Applications[C],2024.