NSD-12020 pages

Data Sheet
NSD-1202
Dual Piezo Motor Driver IC for SQL Series
SQUIGGLE Motors

1 General Description

2 Key Features

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.

Wide Input Supply Voltage Range: 2.8 to 5.5VDC

The two motors can be controlled independently using a standard
I²C interface.

Minimum 65% efficiency (at VDD=2.8V, IOUT=25mA,
freq=2MHz)

Step-up converter to generate programmable high-voltage
power supply (24 to 40V)

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.

4x output driver with defined rise/fall time
I²C interface
On chip registers store driver instructions

Four half bridge drivers create pairs of phase-shifted square waves
with ultrasonic frequency as required to drive SQL Series
SQUIGGLE motors.

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 NSD1102.

3 Applications
Figure 1. NSD-1202 Functional Block Diagram

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

L1

VIN (2.8-5.5V)
C1

22µF

Voltage
reference

C2

D1

LX

VDD (2.8-5.5V)
XPD

VDDH (programmable 24V...40V)

4.7µH

VDDH
TRIM

Step-up
controller

VSS
SDA
SCL
ADR

VSSP

NSD-1202
I²C Interface

1µF

Registers

Levelshifter

www.austriamicrosystems.com/NSD-1202

Levelshifter

1

DRV2P2

1

DRV1P1

Levelshifter

LOGIC

DRV2P1

Levelshifter

CLK

1

1

DRV1P2

Revision 0.2

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