Datasheet Linear Technology LT3572

Manufacturer	Linear Technology
Series	LT3572

Dual Full-Bridge Piezo Driver with 900mA Boost Converter

Datasheets

PDF, 158 Kb, Revision: A, File uploaded: Sep 18, 2017

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Packaging

	LT3572EUF#PBF	LT3572EUF#TRPBF
N	1	2
Package	4x4 QFN-20 Package Outline Drawing	4x4 QFN-20 Package Outline Drawing
Package Code	UF	UF
Package Index	05-08-1710	05-08-1710
Pin Count	20	20

Parametrics

Parameters / Models	LT3572EUF#PBF	LT3572EUF#TRPBF
Demo Boards	DC1197A	DC1197A
Design Tools	LTspice File	LTspice File
Export Control	no	no
Features	Piezo Driver, Resistor Set Frequency, External Synchronization	Piezo Driver, Resistor Set Frequency, External Synchronization
Frequency, kHz	2250	2250
Frequency Adjust Range	500kHz - 2.25MHz	500kHz - 2.25MHz
Frequency Sync Range	Up to 2.5MHz	Up to 2.5MHz
Integrated Inductor	no	no
Ishutdown, µA	0.1	0.1
Isupply, mA	3.4	3.4
Monolithic	yes	yes
Number of Outputs	1	1
Operating Temperature Range, °C	0 to 85	0 to 85
Polyphase	no	no
Switch Current, A	0.9	0.9
Synchronous	no	no
Topology	Boost	Boost
Vin Max, V	10	10
Vin Min, V	2.7	2.7
Vout Max, V	40	40
Vout Min, V	5	5
Vswitch Max, V	40	40

Eco Plan

	LT3572EUF#PBF	LT3572EUF#TRPBF
RoHS	Compliant	Compliant

Design Notes

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Tiny Dual Full-Bridge Piezo Motor Driver Operates from Low Input Voltage &mdash DN436
PDF, 116 Kb, File published: Mar 17, 2008
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Tiny Dual Full-Bridge Piezo Motor Driver Operates from
Low Input Voltage вЂ“ Design Note 436
Wei Gu
Introduction
Piezoelectric motors are used in digital cameras for autofocus, zooming and optical image stabilization. They
are relatively small, lightweight and efп¬Ѓcient, but they
also require a complicated driving scheme. Traditionally,
this challenge has been met with the use of separate
circuits, including a step-up converter and an oversized
generic full-bridge drive IC. The resulting high component
count and large board space are especially problematic
in the design of cameras for ever shrinking cell phones.
The LTВ®3572 solves these problems by combining a
step-up regulator and a dual full-bridge driver in a 4mm
Г— 4mm QFN package. Figure 1 shows a typical LT3572
Piezo motor drive circuit. A step-up converter is used
to generate 30V from a low voltage power source such
as a Li-Ion battery or any input power source within the
partвЂ™s wide input voltage range of 2.7V to 10V. The high
output voltage of the step-up converter, adjustable up
to 40V, is available for the drivers at the VOUT pin. The
drivers operate in a full-bridge fashion, where the OUTA
and OUTB pins are the same polarity as the PWMA and …

Articles

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Small, High Efficiency Solution Drives Two Piezo Motors &mdash LT Journal
PDF, 413 Kb, File published: Jan 14, 2008
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LвЂ‰DESIGN IDEAS Small, High Efficiency Solution
Drives Two Piezo Motors
Introduction
Piezoelectric motors are used in
digital cameras for autofocus, zooming and optical image stabilization.
They are relatively small, lightweight
and efficient, but they also require
a complicated driving scheme. Traditionally, this challenge has been
met with the use of separate circuits,
including a step-up converter and an
oversized generic full bridge drive IC.
The resulting high component count
and large board space are especially
problematic in the design of cameras
for ever shrinking cell phones. The
LT3572 solves these problems by
combining a step-up regulator and
a dual full bridge driver in a 4mm Г—
4mm QFN package. A Simple Integrated Solution
to Drive Two Piezo Motors Figure 1 shows a typical LT3572 Piezo
motor drive circuit. A step-up converter
with a high efficiency internal switch is
used to generate 30V from a low voltage …

Model Line

Series: LT3572 (2)

LT3572EUF#PBF LT3572EUF#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Piezo Microactuator Driver

Slices

Microcontrollers