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Horn Driver. RE46C318 Datasheet

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Horn Driver. RE46C318 Datasheet






RE46C318 Driver. Datasheet pdf. Equivalent




RE46C318 Driver. Datasheet pdf. Equivalent





Part

RE46C318

Description

Piezoelectric Horn Driver



Feature


RE46C317/18 Piezoelectric Horn Driver wi th Boost Converter Features: • 3V Op eration • Low Quiescent Current • 1 0V Boost Converter • Low Horn Driver On-Resistance • Compatible with RE46C 117 Applications: • Smoke Detectors CO Detectors • Personal Security P roducts • Electronic Toys Typical Ap plication 2V to 5V V1 L1 10 μH C1 1 0 μF Description: The RE46C317/18 ar.
Manufacture

Microchip

Datasheet
Download RE46C318 Datasheet


Microchip RE46C318

RE46C318; e CMOS piezoelectric horn driver ICs wit h built-in boost converter. They are in tended for use in 3V battery or battery -backed applications. The circuits feat ure a boost converter and a driver circ uit suitable for driving a piezoelectri c horn. The RE46C317/18 are compatible with the RE46C117 device and offer lowe r standby current. The RE46C317 has thr ee valid states of.


Microchip RE46C318

Horn Enable (tri-state, low and high), while the RE46C318 has only two valid s tates, low and high. Package Types RE 46C317/18 PDIP, SOIC FEED VDD LX VSS 1 2 3 4 8 HRNEN 7 HORNS 6 HORNB 5 VO RE46C317/18 FEED HRNEN R1 1.5M C4 1 nF .


Microchip RE46C318

.

Part

RE46C318

Description

Piezoelectric Horn Driver



Feature


RE46C317/18 Piezoelectric Horn Driver wi th Boost Converter Features: • 3V Op eration • Low Quiescent Current • 1 0V Boost Converter • Low Horn Driver On-Resistance • Compatible with RE46C 117 Applications: • Smoke Detectors CO Detectors • Personal Security P roducts • Electronic Toys Typical Ap plication 2V to 5V V1 L1 10 μH C1 1 0 μF Description: The RE46C317/18 ar.
Manufacture

Microchip

Datasheet
Download RE46C318 Datasheet




 RE46C318
RE46C317/18
Piezoelectric Horn Driver with Boost Converter
Features:
• 3V Operation
• Low Quiescent Current
• 10V Boost Converter
• Low Horn Driver On-Resistance
• Compatible with RE46C117
Applications:
• Smoke Detectors
• CO Detectors
• Personal Security Products
• Electronic Toys
Typical Application
2V to 5V
V1
L1
10 μH
C1
10 μF
Description:
The RE46C317/18 are CMOS piezoelectric horn driver
ICs with built-in boost converter. They are intended for
use in 3V battery or battery-backed applications. The
circuits feature a boost converter and a driver circuit
suitable for driving a piezoelectric horn.
The RE46C317/18 are compatible with the RE46C117
device and offer lower standby current.
The RE46C317 has three valid states of Horn Enable
(tri-state, low and high), while the RE46C318 has only
two valid states, low and high.
Package Types
RE46C317/18
PDIP, SOIC
FEED
VDD
LX
VSS
1
2
3
4
8 HRNEN
7 HORNS
6 HORNB
5 VO
RE46C317/18
FEED
HRNEN
R1
1.5M
C4
1 nF
VDD HORNS
LX HORNB
VSS VO
D1
R2
200K
C3
10 μF
RE46C317 Only
High
Tri-state
Low
RE46C318 Only
High
Low
Note 1: Schottky diode D1 must have the maximum peak current rating of at least 1A. For best results, the
forward voltage spec should be less than 0.5V at 1A.
2: Inductor L3 must have the maximum peak current rating of at least 1A. For best results, the DC resistance
should be less than 0.5.
2012-2013 Microchip Technology Inc.
DS20002301B-page 1




 RE46C318
RE46C317/18
Functional Block Diagram
VDD
HRNEN
Tri-state Logic
Level Shifter
(RE46C317 Only)
Standard Logic
Level Shifter
(RE46C318 Only)
R1
Voltage Reference
+
-
+
-
R2
VSS
Horn Driver
Gate Control
VO
HORNB
HORNS
FEED
LX
R3
DS20002301B-page 2
2012-2013 Microchip Technology Inc.




 RE46C318
RE46C317/18
1.0 ELECTRICAL
CHARACTERISTICS
1.1 Absolute Maximum Ratings†
VDD............................................................................................................................................................................. 5.5V
VOUT......................................................................................................................................................................... 12.5V
Input Voltage Range Except FEED, LX................................................................................VIN = VSS – .3V to VDD + .3V
FEED Input Voltage Range ........................................................................................................... VINFD = -10V to + 22V
LX Input Voltage ...............................................................................................................................VINLX = VOUT + 0.8V
Input Current except FEED, LX ...................................................................................................................... IIN = 10 mA
LX Current (Peak) ...........................................................................................................................................IINLX = 1.0A
Operating Temperature .....................................................................................................................TA = -10C to +60C
Storage Temperature ..................................................................................................................TSTG = -55C to +125C
Continuous Operating Current (HORNS, HORNB, VO) .................................................................................. IO = 40 mA
Maximum Human Body Model ESD........................................................................................................................1500V
† Notice: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device. This
is a stress rating only and functional operation of the device at these or any other conditions above those indicated in
the operation listings of this specification is not implied. Exposure to maximum rating 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 charge.
DC ELECTRICAL CHARACTERISTICS – RE46C317
Unless otherwise indicated, all parameters apply at TA = -10°C to +60°C, VDD = 3V, VSS = 0V, C3 = 10 µF.
Typical values are at TA = +25°C
Parameter
Symbol
Test
Pin
Min.
Typ.
Max. Units
Conditions
Supply Voltage
Standby Supply Current
Standby IVO
Quiescent Supply Current
Quiescent IVO
Supply current
VDD
IDD1
IVO1
IDD2
IVO2
ISUP
2
2
5
2
5
2
2 — 5 V Operating
— 0.5 1 µA HRNEN = Float; No loads
— 0 0.3 µA HRNEN = Float; No loads
— 27 49 µA HRNEN = Low; No Loads;
VO = 11V; VL X = 0.5V
— 71 115 µA HRNEN = Low; No Loads;
VO = 11V; VL X = 0.5V
— 300 —
µA HRNEN = Low; No Loads,
Boost Running
Input Current for Tri-state
IIT
8 -5 — 5 µA HRNEN = Float (Note 4)
Input Voltage High
VIHH
8
2.6 —
V HRNEN input
VIHF
1
7 — — V FEED input; VO = 10V
Note 1: The boost converter in Boost mode (normal VO = 10V) can draw current pulses of ~0.8A and therefore is very sensitive
to series resistance. The critical components of this resistance are the inductor DC resistance, the internal resistance of
the battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin. In
order to function properly under full load at VDD = 2V, the total of the inductor and the interconnect resistances should
not exceed 0.3. The internal battery resistance should be no more than 0.5. A low ESR capacitance of 10 µF or more
should be connected in parallel with the battery to average current over the boost converter cycle.
2: In the above table, wherever a specific VO value is listed under test conditions, the VO is forced externally with the
inductor disconnected, and the boost converter is not running.
3: The limits shown are 100% tested at +25°C only. Test limits are guard-banded, based on temperature characterization
to ensure compliance at temperature extremes.
4: This is the maximum input current that will not cause a logic high or logic low to be asserted.
2012-2013 Microchip Technology Inc.
DS20002301B-page 3



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