NSD-1202 Datasheet, PDF (1/13 Pages) ams AG – Dual Piezo Motor Driver IC for SQL Series

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.
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.
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
Figure 1. NSD-1202 Functional Block Diagram
The NSD-1202 is ideal for SQUIGGLE piezoelectric motor driver.
L1
VIN (2.8-5.5V)
4.7µH
C1 _22µF
LX
VDD (2.8-5.5V)
VDDH (programmable 24V...40V)
D1
VDDH
C2
1µF
XPD
Voltage
reference
Step-up
controller
TRIM
VSS
SDA
SCL
ADR
CLK
NSD-1202
I²C Interface
Registers
Level-
shifter
1
LOGIC
Level-
shifter
1
Level-
shifter
1
Level-
shifter
1
VSSP
DRV2P1
DRV2P2
DRV1P1
DRV1P2
www.austriamicrosystems.com
Revision 0.1
1 - 13