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PDF RE46C100 Data sheet ( Hoja de datos )
| Número de pieza | RE46C100 | |
| Descripción | Piezoelectric Horn Driver Circuit | |
| Fabricantes | Microchip | |
| Logotipo |  |
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RE46C100
Piezoelectric Horn Driver Circuit
Features:
• Low Quiescent Current (< 100 nA)
• Low Driver RON – 20typical at 9V
• Wide Operating Voltage Range
• Available in 8-pin DFN, PDIP and SOIC packages
General Description:
The RE46C100 devices are intended for applications
using a self oscillating piezoelectric horn, although it
can be used in direct drive applications. Feedback
control and a driver circuit are provided, as well as a
horn enable function.
The RE46C100 is intended for use in smoke detectors,
CO detectors, personal security products and
electronic toys.
Functional Block Diagram
HRNEN 8
Package Types
RE46C100
PDIP, SOIC
NC 1
VDD 2
NC 3
FEED 4
8 HRNEN
7 HORNS
6 HORNB
5 VSS
RE46C100
2x3 DFN*
NC 1
8 HRNEN
VDD 2 EP 7 HORNS
NC 3 9 6 HORNB
FEED 4
5 VSS
* Includes Exposed Thermal Pad (EP); see Table 2-1.
4 FEED
7 HORNS
VDD 2
VSS 5
6 HORNB
2009-2014 Microchip Technology Inc.
DS20002166B-page 1
1 page  
3.0 DEVICE DESCRIPTION
The RE46C100 horn driver provides the circuitry
necessary to drive a three-terminal self-oscillating
piezoelectric horn. It can also drive a two-terminal
piezoelectric horn with the FEED pin used as a signal
input. The horn driver provides a push-pull circuit to
drive the horn, as shown in the Typical Application
circuit.
In a self-oscillating application, the FEED pin is
connected to the feedback pin of the piezoelectric horn
through a resistor. To drive a two-terminal piezoelectric
horn with an external signal, the FEED pin should be
used as the external signal input. The horn is enabled
when HRNEN is driven to a logic high and is silenced
when HRNEN is driven to a logic low. The horn output
can be modulated using the HRNEN input.
RE46C100
2009-2014 Microchip Technology Inc.
DS20002166B-page 5
5 Page 
RE46C100
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2009-2014 Microchip Technology Inc.
DS20002166B-page 11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet RE46C100.PDF ] | |
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