Automated door & gate

Non-isolated DC/DC power supply

Multiple voltage rails are generated from the input power source to support all the devices used in the system. Buck converters with high efficiency at light load can be used in designs that prioritize maximum battery life and better thermal efficiency. Low-noise, high-PSRR linear regulators may be used to ensure EMI specifications are met and improve wireless communication. Power management multi-channel ICs (PMICs) will provide multiple voltage rails in a small footprint for tight conscious designs.

Analog switches & muxes

MUX509—6.7-pF on-state capacitance, 36-V, 4:1, 2-channel analog multiplexer

TS5A3157—5-V, 2:1 (SPDT), 1-channel general-purpose analog switch (6-pin SOT-23, SC70, DSBGA packages)

TS5A3160—1-Ω on-state resistance, 5-V, 2:1 (SPDT), analog switch (6-pin SOT-23, SC70 packages)

SN74LVC1G3157—5-V, 2:1 (SPDT), 1-channel general-purpose analog switch

Energy storage

A backup battery may be included in the design to provide some protection against an unexpected power loss. A battery management device can handle charging in systems that use a rechargeable battery. A battery gauge device can monitor the battery voltage.

Products

Noninverting buffers & drivers

SN74AHCT1G125—Single 4.5-V to 5.5-V buffer with TTL-compatible CMOS inputs and 3-state outputs

SN74LVC07A—6-ch, 1.65-V to 5.5-V buffers with open-drain outputs

SN74LVC1G17—Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

Isolated AC/DC power supply

Automated gates can powered from a single-phase or a three-phase AC power source.

Products

Flyback controllers

UCC28711—Constant-voltage, constant-current PWM with PSR, valley switching, NTC option, and 0-mV cable comp.

N-channel MOSFETs

CSD18533Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 mOhm

CSD19533Q5A—100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.5 mOhm

CSD19538Q2—100-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 59 mOhm

CSD18537NQ5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 13 mOhm

Shunt voltage references

LM431—2%, 1%, or 0.5% accuracy, adjustable precision Zener shunt regulator

TL431—Adjustable precision shunt regulator

LM4041-N—Fixed & adjustable, 45-µA, precision micropower shunt voltage reference

Digital signal input/output protection

A number of ESD protection devices can be used to protect the digital input/output interfaces.

Products

ESD protection diodes

TPD6E001—6 channel 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0

TPD2E001—Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0

TPD2E007—Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

TPD4S012—Quad 0.8-pF, 5.5-V, ±10-kV ESD protection diode with 15-V tolerant Vbus for USB Interface<

Digital input/output interface

Optional accessories such as loop detectors, externa radio controllers, and card readers/keypads interface to the system through a digital input/output interface. A shift register or I2C I/O expander can be used to expand the number of input/output pins available to the system microcontroller.

Products

Shift registers

SN74HC595—8-bit shift registers with 3-state output registers

SN74AHC595—8-bit shift registers with 3-state output registers

I2C general-purpose I/Os (GPIOs)

PCF8574A—8-bit 2.5- to 5.5-V I2C/SMBus I/O expander with interrupt

Obstacle detection

Obstacles in the path of the gate are detected using a mmWave sensor or an IR LED and photodiode. External devices such as a loop detector can also be used.

Products

General-purpose op amps

TLV9162—Dual, 16-V, 11-MHz, rail-to-rail input and output low-offset-voltage low-noise operational amplifier

OPA994—Single, 32V, 24MHz RRIO high-output-current (125mA) op amp with unlimited capacitance load drive

OPA4991—Quad, 40-V, 4.5-MHz, low-power operational amplifier

TLV9062—Dual, 5.5-V, 10-MHz operational amplifier

Precision op amps (Vos<1mV)

LMV844—Quad CMOS Input, RRIO, Wide Supply Range Operational Amplifiers

Audio op amps

TL972—Dual, 12-V, 12-MHz operational amplifier

Industrial mmWave radar sensors

IWR6843—Single-chip 60-GHz to 64-GHz intelligent mmWave sensor integrating processing capability

IWR6843AOP—Single-chip 60-GHz to 64-GHz intelligent mmWave sensor with integrated antenna on package (AoP)

IWRL6432—Single-chip low-power 57-GHz to 64-GHz industrial mmWave radar sensor

Wired interface signal input/output protection

A number of ESD protection devices can be used to protect the wired interfaces.

Products

ESD protection diodes

TPD6E001—6 channel 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0

TPD2E001—Dual 1.5-pF, 5.5-V, ±8-kV ESD protection diode with 1-nA max leakage & VCC pin for USB 2.0

TPD2E007—Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

TPD4S012—Quad 0.8-pF, 5.5-V, ±10-kV ESD protection diode with 15-V tolerant Vbus for USB Interface<

Wireless interface

A wireless interface may be included for remote operation of the automated gate. The wireless interface may include Wi-Fi, Bluetooth, or proprietary Sub-1GHz protocols.

Products

Other wireless products

CC2500—Low Cost, Low-Power 2.4 GHz RF Transceiver Designed for Low-Power Wireless Apps in the 2.4 GHz ISM B

CC2530-RF4CE—Zigbee, IEEE 802.15.4 and RF4CE wireless MCU with 256kB Flash and 8kB RAM

Low-power 2.4-GHz products

CC2651R3—SimpleLink™ 32-bit Arm® Cortex®-M4 single-protocol 2.4-GHz wireless MCU with 352-kB flash

CC2642R—SimpleLink™ 32-bit Arm Cortex-M4F Bluetooth® Low Energy wireless MCU with 352kB Flash

Sub-1 GHz transceivers

CC1101—Low-power Sub-1 GHz wireless transceiver

Sub-1 GHz wireless MCUs

CC1352R—SimpleLink™ 32-bit Arm Cortex-M4F multiprotocol Sub-1 GHz & 2.4 GHz wireless MCU with 352kB Flash

Gate motor drive

The microcontroller opens or closes the gate through the use of a motor. Brushless DC motors and induction type AC motors are typically used in barrier, swing, and lift gates.

Products

BLDC drivers

DRV8328—60 V 1000/2000 mA 3-phase gate driver

DRV8312—70-V max 6.5-A peak 3-phase motor driver with integrated FETs

Stepper motor drivers

DRV8434A—48-V, 2.5-A bipolar stepper motor driver, integrated current sensing & stall detection (GPIO)

DRV8803—60-V, 2.3-A, quad low-side motor driver with PWM control

Integrated control BLDC drivers

DRV10866—5-V nominal, 0.85-A peak sensorless trapezoidal control, 3-phase BLDC motor driver

N-channel MOSFETs

CSD18533Q5A—60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 mOhm

CSD19533Q5A—100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.5 mOhm

CSD19538Q2—100-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 59 mOhm

Low-side drivers

LMG1020—7-A/5-A single channel gate driver with 5-V UVLO for nano second input pulses

Audible alarm interface

A buzzer or speaker output allows for alarms to be generated by the system. A boost converter or charge pump topology provides a loud alarm notification (85 dB) from a 3V rail. A piezo driver topology or a Class D audio topology provides a single tone notification or an audible voice notification. A 555 timer topology gives a pulsed alarm rather than a constant alarm notification without adding additional MCU instructions. A MOSFET topology is for designs with a higher rail for which an MCU command will drive the buzzer on or off.

Products

General-purpose op amps

TLV9162—Dual, 16-V, 11-MHz, rail-to-rail input and output low-offset-voltage low-noise operational amplifier

OPA994—Single, 32V, 24MHz RRIO high-output-current (125mA) op amp with unlimited capacitance load drive

OPA4991—Quad, 40-V, 4.5-MHz, low-power operational amplifier

TLV9062—Dual, 5.5-V, 10-MHz operational amplifier

Precision op amps (Vos<1mV)

LMV844—Quad CMOS Input, RRIO, Wide Supply Range Operational Amplifiers

Audio op amps

TL972—Dual, 12-V, 12-MHz operational amplifier