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R&E International
A Subsidiary of Microchip Technology Inc.
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver Product Specification
General Description
The RE46C105 is a piezoelectric horn driver with a voltage regulator and an open drain NMOS driver suitable for use with a light emitting diode. It is intended for 9V battery applications which require a low voltage logic supply. The regulator can be operated at either 3.3V or 5V. The horn feedback control pin is designed for use with self-oscillating piezoelectric horn but can also be used in direct drive applications. A low battery detection circuit is also provided.
Features
* * * * * * Low Quiescent Current Low Horn Driver Ron Voltage Regulation to 3.3V or 5V Low Battery Detection Available in DIP and SOIC packaging
Available in Standard Packaging or RoHS Compliant Pb Free Packaging
Pin Configuration
LBOUT LBSTRB LBSET LED VDD LEDEN FEED
Applications
Smoke detectors CO Detectors Personal Security Products Electronic Toys
1
14
REGEN REGOUT REGSEL HRNEN HORNS HORNB VSS
Absolute maximum ratings
Supply Voltage Vdd ......................................................-.5V to +14V 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 ................................................ -40 to 85C Continuous Output Current (HornS, HornB) ..................... 30mA Continuous Output Current (REGOUT) ........................... 55mA
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.
DS22167A-page 1
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Electrical Characteristics at TA = 25C, VDD = 9V, Vss = 0V (unless otherwise noted). Parameter Supply Voltage Standby Supply Current Input Leakage Test Pin
Vdd Vdd Hrnen,Leden, Lbstrb,Regen FEED FEED Hrnen,Leden, Lbstrb,Regen Hrnen,Leden Lbstrb,Regen Horns or Hornb
Test Conditions Operating Hrnen=Lbstrb=Leden=Vss Regen=Vdd; No Loads Vin=Vdd or Vss Feed = +22V Feed = -10V
Min 6.0
Limits Typ Max 9.0 13.8 3.5 100 20 -15 50 1.0
Units V uA nA uA uA V V
-100 -50 2.3
Input Voltage Low Input Voltage High Output Low Voltage
Output High Voltage
LED LBout Horns or Hornb LBout
Low Battery VoltageThreshold Low Battery Voltage Hysteresis Lbstrb to Lbout Active delay Regulator Voltage
Vdd
Lbstrb Lbstrb, Lbout Regout
Iout=16mA Vdd=9V Vdd=7.2V Iout=10mA Vdd=7.2V Iout=100uA Iout=-16mA Vdd=9V Vdd=7.2V Iout=-100uA Regsel=Vdd Regsel=Vss Lbstrb=Vdd, Vdd decreasing in voltage TA=-40 to 85C See note #3 Lbstrb=Vdd Vdd increasing in voltage Lbstrb=Vdd Iout<50mA Regsel=Vdd Iout<50mA Regsel=Vss TA=-40 to 85C See note #3 6V 1mA Regsel=Vss; Iout > 1mA
0.3 0.5 0.3 8.7 4.75 3.0
0.5 0.9 1.0 0.5
8.5 6.3 4.5 2.8 7.2
7.80
V V V V V V V V V
300 500 4.75 3.10 5.0 3.3 30 100 5.0 25 6.0 4.0 6.5 4.3 5.25 3.50
mV uS V V mV mV V mA V V
Line Regulation Load Regulation Brown-Out Threshold Voltage
*See note #1
Regout Regout Vdd
4.5 15 5.5 3.7
5.5
Brown-Out Pull Down Current Regout Overvoltage Clamp *See note #2
Regout Regout
(c) 2009 Microchip Technology Inc.
DS22167A-page 2
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Notes: 1/ The brown-out threshold voltage is the Vdd voltage at which the regulator will be disabled and Regout will be pulled to Vss. 2/ In normal operation, the regulator will provide high-side current of up to 20mA, but current sinking capability is typically under 1uA. The over-voltage clamp is intended to limit the voltage at REGOUT when it is pulled up by an external source. 3/ The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee compliance at temperature extremes.
Typical Application
(c) 2009 Microchip Technology Inc.
DS22167A-page 3
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver Product Specification R&E International
A Subsidiary of Microchip Technology Inc.
Functional Block Diagram
REGEN 14
VDD
5
Bandgap Reference
13
REGOUT
VSS
1
REGSEL
12
Output Adjust
Clamp & Shutdown Circuit
Vdd
1 LBSET 3
LBOUT
LBSTRB
2
7
FEED
HRNEN
11
10
HORNS
9 4 LEDE 6
HORNB LED
(c) 2009 Microchip Technology Inc.
DS22167A-page 4
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver 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.
DS22167A-page 5

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