Sinusoidal Piezoelectric Actuator Driver with Step-Up DC-DC Converter

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Overview

The FAN8831 is a single-chip piezoelectric actuator driver consisting of step-up DC-DC converter with integrated 36 V boost switch and a full-bridge output stage. The device is capable of driving a Piezo bi-directionally at 120 V peak to peak from a single 3 V lithium cell. The step-up DC-DC converter operates in critical conduction mode (CRM) and is optimized to work in a coupled inductor configuration to provide output voltages in excess of 60 V. Over-voltage protection, over -current protection, and thermal shutdown are all provided. An internal ready is used to enable the full-bridge gate driver when step-up DC-DC converter output voltage reaches the proper level with hysteresis. The boost voltage is set using external resistors, and step-up current limit is programmable via the external resistor at OCP pin. The output H-bridge features four integrated 75 V P and N-channel for sine wave drive of the Piezo actuator.

  • Consumer
  • Consumer Appliances
  • LCD TV
  • Step-Up DC-DC Converter
  • Integrated Step-up Power Switch up to 36 V
  • Wide Operating Voltage Range of 2.7 to 5.5 V
  • Adjustable Step-up Output Voltage
  • Adjustable Step-up Current Limit
  • Zero Current Detector (ZCD)
  • Internal Soft-Start
  • Built-in Protection Circuit
  • Over Voltage Protection (OVP)
  • Thermal Shutdown (TSD)
  • Piezo Actuator Driver
  • Integrated Full-Bridge Switches (VDS=75 V)
  • Digitally implemented Sine Modulator
  • Package Information
  • Small 4.0 mm × 4.0 mm MLP

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VCC Max (V)

V(BR)GSS Max (V)

V(BR)DSS Max (V)

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FAN8831MPX

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CAD Model

Pb

A

H

P

WQFN-24

1

260

REEL

3000

N

1

3.3

5.5

75

-

-

150

Price N/A

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