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R&E International
A Subsidiary of Microchip Technology Inc.
RE46C104
Piezoelectric Horn Driver and Voltage Converter Product Specification
General Description
The RE46C104 is a piezoelectric horn driver with voltage converter to provide maximum audibility in low voltage applications. The feedback control pin is designed for use with self-oscillating piezoelectric horn but can also be used in direct drive applications. The built-in charge pump voltage converter provides increased supply voltage for the horn drivers allowing outputs to swing from Vss to 2 x Vdd. A charge pump enable pin is provided to minimize supply current when not in use.
Features
* * * * Low Quiescent Current Low Driver Ron Wide Operating Voltage Range Available in Standard Packaging or RoHS Compliant Pb Free Packaging
Pin Configuration
N/C FEED CAPVss CAP+ HRNEN N/C
Applications
Smoke detectors CO Detectors Personal Security Products Electronic Toys
1
14
N/C Vdd CPMPEN HORNS HORNB VPOS N/C
Absolute maximum ratings
Supply Voltage Vdd ......................................................-.5V to +9.0V Input voltage Range Vin ............................................... -.3V to VDD+.3V, except FEED FEED Input Voltage Range Vinf .................................... -10V to +22V Input Current Iin .......................................................... 10mA, except FEED Operating Temperature ................................................ 0 to 50C Continuous Output Current (HornS, HornB, or Vpos).......... 30mA
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and operation at these conditions for extended periods may affect device reliability. This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used when handling this product. Damage can occur when exposed to extremely high static electrical charges
(c) 2009 Microchip Technology Inc.
DS22164A-page 1
RE46C104
Piezoelectric Horn Driver and Voltage Converter Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Electrical Characteristics at TA = 25C, VDD = 5V, Vss = 0V (unless otherwise noted). Parameter Supply Voltage Standby Supply Current
Vdd
Test Pin
Vdd Vdd
Test Conditions Operating Hrnen, Cpmpen = Vss Feed = Vss ; Vdd = 5V Hrnen, Cpmpen = Vss Feed = Vss ; Vdd = 8V
Min 4.0
Limits Typ Max 5.0 100 8.0 500
Units V nA
500
nA
Supply Current
Vdd
Hrnen = Vss Cpmpen = Vdd No Loads; See note 1
200
500
uA
Input Leakage
Hrnen & Cpmpen FEED
Vin = Vdd or Vss Feed = +22V Cpmpen = Vdd
-100 20
100 50
nA uA
FEED
Feed = -10V Cpmpen = Vdd
-50
-15
uA
Input Voltage Low Input Voltage High Output Low Voltage Output High Voltage Vpos Output Voltage
Hrnen & Cpmpen Hrnen & Cpmpen Horns or Hornb Horns or Hornb Vpos
1.0 2.3 Iout = 16mA Cpmpen = Vdd Iout = -16mA Cpmpen = Vdd Iout = -16mA Cpmpen = Vdd Hrnen = Vss 0.3 8.5 8.7 8.9 0.5
V V V V V
Charge Pump Oscillator Freq Charge Pump Power Efficiency Charge Pump Voltage Conversion Efficiency
Vpos
16
kHz
Vpos
Iout = -16mA C1=C2=10uF No Loads C1=C2=10uF 95
85
%
Vpos
99
%
(c) 2009 Microchip Technology Inc.
DS22164A-page 2
RE46C104
Piezoelectric Horn Driver and Voltage Converter Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Typical Application
Charge Pump Enable Active High +5V 1 N/C 2 FEED 3 CAP4 C1 5 Horn Enable Active High Note: C1 = 10uF C2 = 10uF C3 = 1nF R1 = 1.5Mohm R2 = 200kohm 6 7 CAP+ HRNEN N/C HORNB VPOS N/C C2 C3 R1 R2 VSS HORNS 10 9 8 Piezo CPMPEN 11 VDD 12 N/C 13 14
RE46C104
(c) 2009 Microchip Technology Inc.
DS22164A-page 3
RE46C104
Piezoelectric Horn Driver and Voltage Converter Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Functional Block Diagram
VDD
13
VSS
4
VDD
Substrate Logic 5 9 VPOS
CAP+ CAP-
3
Level Shifters
CPMPEN
12
Oscillator and Logic
VPOS
10
HORNB
HRNEN
6
Level Shifter
11
HORNS FEED
2
Notes: 1/ The supply current specification is an average under steady state conditions. The instantaneous current will exceed this value when C1 and C2 charge-up initially (after charge pump is enabled) and during subsequent recharging of C1 and C2.
(c) 2009 Microchip Technology Inc.
DS22164A-page 4
RE46C104
Piezoelectric Horn Driver and Voltage Converter Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Trademarks
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, rfPIC, SmartShunt and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, nanoWatt XLP, PICkit, PICDEM, 32 logo, PowerCal, PowerInfo, PICDEM.net, PICtail, PIC PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2009, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
(c) 2009 Microchip Technology Inc.
DS22164A-page 5

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