NSD-1202

Dual Piezo Motor Driver IC for SQL Series

SQUIGGLE Motors

www.austriamicrosystems.com

Revision 0.1

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Data Sheet

1 General Description

The NSD-1202 is a dedicated piezo motor driver ASIC capable of

driving two SQL Series SQUIGGLE motors from a single 2.8 to 5.5

VDC supply.

The two motors can be controlled independently using a standard

I²C interface.

An on-chip DC-DC step-up converter generates the high supply

voltage (24 to 40 VDC) required by the piezoelectric elements of the

SQUIGGLE motor.

Four half bridge drivers create pairs of phase-shifted square waves

with ultrasonic frequency as required to drive SQL Series

SQUIGGLE motors.

Figure 1. NSD-1202 Functional Block Diagram

2 Key Features

Wide Input Supply Voltage Range: 2.8 to 5.5VDC

Step-up converter to generate programmable high-voltage

power supply (24 to 40V)

freq=2MHz)

4x output driver with defined rise/fall time

I²C interface

On chip registers store driver instructions

Power-down mode for minimal power consumption in stand-by

Small 4x4mm 16-Pin QFN Package

This part supersedes and is backward-compatible with the NSD-

1102.

3 Applications

The NSD-1202 is ideal for SQUIGGLE piezoelectric motor driver.

VDDH

LX

VSSP

DRV2P2

DRV1P1

DRV1P2

NSD-1202

TRIM

Level-

shifter

Level-

shifter

Level-

shifter

Level-

shifter

LOGIC

I²C Interface

Voltage

reference

Registers

1

1

1

1

Step-up

controller

SCL

ADR

CLK

DRV2P1

SDA

VSS

XPD

VDD (2.8-5.5V)

VIN (2.8-5.5V)

C1

22µF

L1

4.7µH

D1

VDDH (programmable 24V...40V)

C2

1µF