Ultrasonic Piezo Motor Driver IC, output for two SQL-1.8 series SQUIGGLE® motors0 pages

NSD-1202
Dual Piezo Motor Driver IC for SQL Series
SQUIGGLE Motors
www.austriamicrosystems.com/NSD-1202 Revision 0.2 1 - 13
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)
.. Minimum 65% efficiency (at VDD=2.8V, IOUT=25mA,
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.
LX VDDH
VSSP
DRV2P2
DRV1P1
DRV1P2
NSD-1202
TRIM
Levelshifter
Levelshifter
Levelshifter
Levelshifter
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 22ìF
L1
4.7ìH
D1
VDDH (programmable 24V...40V)
C2
1ìF