描述 Description

This monolithic, high-voltage, high-speed pulser generator features four independent channels. It is designed for medical ultrasound imaging applications, but it can also be used for driving other piezoelectric, capacitive or MEMS based transducers. The STHV748 comprises a controller logic interface circuit, level translators, MOSFET gate drivers, noise blocking diodes, and high-power P-channel and N-channel MOSFETs as the output stage for each channel, clamping-to-ground circuitry, anti-leakage, anti-memory effect block, thermal sensor, and a T/R switch which guarantees an effective decoupling during the transmission phase. Moreover, the STHV748 includes self-biasing and thermal shutdown blocks. Each channel can support up to five active output levels with two half bridges. The output stage of each channel is able to provide ±2 A peak output current. In order to reduce power dissipation during continuous wave mode, a dedicated half bridge is available and the peak current is limited to 0.6 A.

特性 Features

0 to ±90 V output voltage
Up to 20 MHz operating frequency
Embedded low-power, floating high-voltage drivers (external voltage rails can be also used)
Mode operations:3/5-levels output waveform
±2 A source and sink current
Down ≤ 20 ps jitter
Anti-cross conduction function
Low 2nd harmonic distortion

Fully integrated clamping-to-ground function8 Ω synchronous active clamp
Anti-leakage on output node

Dedicated half bridge for continuous wave (CW) operations≤ 0.1 W power consumption
±0.6 A source and sink current
205 fs RMS jitter [100 Hz-20 kHz]

Fully integrated T/R switch13.5 Ω on resistance
HV MOS topology to minimize current consumption
Up to 300 MHz BW
Receiver multiplexing function

2.4 V to 3.6 V CMOS logic interface
Auxiliary integrated circuitsNoise blocking diodes
Fully self-biasing architecture
Anti-memory effect for all internal HV nodes
Thermal protection
Standby function

Latch-up free due to HV SOI technology
Very few external passive components needed

簡介

STHV748屬于集成電路（IC）的電源管理-專用。由制造生產(chǎn)的STHV748電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲器總線端接、接地故障檢測、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護(hù)、觸覺驅(qū)動器、熱電制冷器控制等。