BOS1901 Piezo Haptic Driver
BOS1901 Piezo Haptic Driver

BOS1901 Piezo Haptic Driver

Regular price $5.00 USD - Sample Pricing

Minimum Order: 20 Units - Maximum Order : 99 Units

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Download BOS1901 Datasheet

Product Description

190 Vpk-pk Piezo Haptic Driver Powered by CapDriveTM

The BOS1901 is a single-chip piezo actuator driver with energy recovery, based on our patented CapDrive™ technology. It can drive actuators with up to 190 Vpk-pk waveforms while operating from a 3-5.5 V supply voltage. The input digital stream is written in the internal FIFO over the digital interface to generate the desired output waveform. Low power and small size make it suitable in a variety of applications where power consumption and heat dissipation must be minimized.

The BOS1901 uses a high-speed SPI in its Digital Front End. It enables the device to share a common communication bus for multi-actuator systems and the user to query various data such as the actuator voltage for sensing applications.

The differential driver achieves low distortion waveforms and quiet actuator operation. All settings are adjustable through the digital front end to reduce the BOM. Only 7 passive discrete components are required. The BOS1901 can be operated with a wide selection of commercial off-the-shelf inductors.

In systems that can’t handle reverse current flow in the power delivery network, the BOS1901 features a unidirectional power input (UPI). When the UPI mode is activated, the driver behaves as a resistive load without reducing power efficiency.

Typical start-up time of less than 300 µs makes the BOS1901 latency insignificant in most systems. Safety systems protect the device from damage in case of a fault.

Parametric Specifications

Description BOS1901
Supply Voltage Min 3.0 V
Supply Voltage Max 5.5 V
I/O Supply Voltage Min 1.62 V
I/O Supply Voltage Max 5.5 V
Full-Scale Output Voltage 190 Vpp
Quiescent Current (Sleep) 1 µA
Total Harmonic Distortion + Noise 0.5 %


  • High-Voltage Low Power Piezo Driver
    • Drives 100 nF at 190 Vpk-pk and 300 Hz with only 350 mW
    • Drives Capacitive Load up to 820 nF
    • Energy Recovery
    • Differential Output
    • Miniature Solution Footprint, WLCSP 2.1x2.2 mm
    • Small Solution Footprint, QFN 4x4 mm
    • Low BOM cost
  • Integrated Digital Front End with SPI
    • 64 samples Internal FIFO Interface
    • 1.8 V to 5.0 V Digital I/O Supply
  • Piezo Force Sensing
  • Fast Start Up Time, < 300 µs
  • Unidirectional Power Input option
  • Wide Supply Voltage Range, 3 to 5.5 V
CapDrive Technology

BOS1901 Technical Documentation

Document Name Type Size Release Date
BOS1901 - Datasheet (English) PDF 1.99 MB 2020-08-20
BOS1901 - Product Brief (English) PDF 242 KB 2019-04-23
BOS1901 - Product Brief (German)(auf Deutsch) PDF 250 KB 2019-04-23
BOS1901 - Product Brief (Korean)(한국어) PDF 290 KB 2019-04-23
BOS1901 - Product Brief (Japanese)(日本語) PDF 302 KB 2019-04-23
BOS1901 - Product Brief (Chinese)(简体中文) PDF 337 KB 2019-04-23

BOS1901 Application Notes

Document Name Type Size Release Date
BOS1901 - Probing BOS1901 with an Oscilloscope PDF 412 KB 2019-09-18
BOS1901 – Sensing Piezoelectric Actuator Force using BOS1901 PDF 459 KB 2019-11-25
BOS1901 – Driving Piezoelectric Actuator using BOS1901 PDF 580 KB 2020-03-11
BOS1901 – Oscillator Trimming PDF 437 KB 2020-03-11

Design - BOS1901 Development-Kit

BOS1901 Development-Kit

The First Step For a Successful Integration

The BOS1901-Kit has been designed to provide a plug-and-play experience to first-time users.

Designed to support your development process, the BOS1901-Kit combines two BOS1901 high-voltage piezoelectric drivers compatible with a wide range of piezo actuators.

Order the BOS1901-Kit