R&E International
RE46C104
Piezoelectric Horn Driver with Voltage Converter
Product Specification
R&E International 1
DS-RE46C104-091201
King of Prussia PA
610-992-0727
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.
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Features
Low Quiescent Current
Low Driver Ron
Wide Operating Voltage Range
Pin Configuration
N/C
FEED
CAP-
Vss
HRNEN
N/C
CAP+
N/C
Vdd
CPMPEN
HORNS
VPOS
N/C
HORNB
1
14
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 50
C
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
R&E International
RE46C104
Piezoelectric Horn Driver with Voltage Converter
Product Specification
R&E International 2
DS-RE46C104-091201
King of Prussia PA
610-992-0727
Electrical Characteristics at TA = 25
C, VDD = 5V, Vss = 0V (unless otherwise noted).
Parameter
Test
Pin
Test Conditions
Limits
Min Typ Max
Units
Supply Voltage
Vdd
Operating
4.0 5.0 8.0
V
Standby Supply
Current
Vdd
Hrnen, Cpmpen = Vss
Feed = Vss ; Vdd = 5V
100 500
nA
Vdd
Hrnen, Cpmpen = Vss
Feed = Vss ; Vdd = 8V
500
nA
Supply Current
Vdd
Hrnen = Vss
Cpmpen = Vdd
No Loads; See note 1
200 500
uA
Input Leakage
Hrnen &
Cpmpen
Vin = Vdd or Vss
-100 100
nA
FEED
Feed = +22V
Cpmpen = Vdd
20 50
uA
FEED
Feed = -10V
Cpmpen = Vdd
-50 -15
uA
Input Voltage Low
Hrnen &
Cpmpen
1.0
V
Input Voltage High
Hrnen &
Cpmpen
2.3
V
Output Low Voltage
Horns or
Hornb
Iout = 16mA
Cpmpen = Vdd
0.3 0.5
V
Output High Voltage
Horns or
Hornb
Iout = -16mA
Cpmpen = Vdd
8.5 8.7
V
Vpos Output Voltage
Vpos
Iout = -16mA
Cpmpen = Vdd
Hrnen = Vss
8.9
V
Charge Pump
Oscillator Freq
Vpos
16
kHz
Charge Pump Power
Efficiency
Vpos
Iout = -16mA
C1=C2=10uF
85
%
Charge Pump Voltage
Conversion Efficiency
Vpos
No Loads
C1=C2=10uF
95 99
%
R&E International
RE46C104
Piezoelectric Horn Driver with Voltage Converter
Product Specification
R&E International 3
DS-RE46C104-091201
King of Prussia PA
610-992-0727
Typical Application
RE46C104
Piezo
Horn Enable
Active High
Charge Pump Enable
Active High
R1
R2
C3
1
N/C
2
FEED
3
CAP-
4
VSS
5
CAP+
6
HRNEN
7
N/C
14
N/C
13
VDD
12
CPMPEN
11
HORNS
10
HORNB
9
VPOS
8
N/C
C1
C2
Note:
C1 = 10uF
C2 = 10uF
C3 = 1nF
R1 = 1.5Mohm
R2 = 200kohm
+5V
R&E International
RE46C104
Piezoelectric Horn Driver with Voltage Converter
Product Specification
R&E International 4
DS-RE46C104-091201
King of Prussia PA
610-992-0727
Functional Block Diagram
13
6
4
VDD
VSS
CPMPEN
CAP+
CAP-
HRNEN
HORNS
HORNB
FEED
VPOS
Level
Shifters
9
5
3
12
Substrate Logic
VDD
Oscillator
and Logic
2
11
10
VPOS
Level
Shifter
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.
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