Canique Switch - Nanopower Relay
Canique Switch is a relay board with an integrated latching relay that you can operate at only 3V. The board consumes almost no power when the relay is not switching. That is you can switch the relay on, and the board will
only consume power while switching it on or off (for about 10 milliseconds) but after that operation the supply current is practically zero. The relay will retain the state that you left it in - even if you
disconnect power entirely.
Canique Switch also solves the problem of initialization: if you don't know what state your relay is in, you can simply read the value of the feedback pin. It will tell you whether the relay is currently switched on or off.
Use cases can be:
Canique Switch also solves the problem of initialization: if you don't know what state your relay is in, you can simply read the value of the feedback pin. It will tell you whether the relay is currently switched on or off.
- Switching LEDs on/off
- Switching a fan on/off
- Powering on/off computers like a Raspberry Pi
Économique: 35nA typical power consumption
In sleep mode, while retaining the current relay state, Canique Switch consumes less than 35 nanoamperes from a 3V power supply.
Pins
- 3V (VCC): The power supply pin. Connect a power supply that is able to deliver up to 37mA.
- GND: Ground
- SET: Drive SET pin high, and RST pin low to switch relay on. Pin is pulled down internally by a pulldown resistor.
- RST: Drive RST pin high, and SET pin low to switch relay off. Pin is pulled down internally by a pulldown resistor.
- ZZ: Sleep Pin - drive low or set to high impedance to enter sleep state. Drive high to switch to active mode (necessary when switching relay). Pin is pulled down internally by a pulldown resistor.
- FB: Feedback Pin - this pin is high if relay is switched on, and low if relay is switched off. It helps you monitor the current state of the relay and detect any errors.
Usage
Initialization / Sleep Mode:
Drive SET, RESET and ZZ pins low. Device will now be in Sleep Mode (current consumption will be in nano amp region). No current will flow through SET/RESET pins. Note that driving SET or RESET high will increase consumption due to integrated pulldown resistors.
Turning Relay on/off:
Drive ZZ pin high. Device will go out of sleep mode (current consumption will be in microamp region).
To turn the relay on: Drive SET pin to VCC voltage (3V), drive RESET pin low at the same time.
To turn the relay off: Drive RESET pin to VCC voltage (3V), drive SET pin low at the same time.
Wait for 10ms to give the relay time to switch. You can also monitor the FB (feedback) pin. It will go high as soon as the relay is on, and low when it is off.
Then repeat sleep procedure from above to enter sleep mode again.
Drive SET, RESET and ZZ pins low. Device will now be in Sleep Mode (current consumption will be in nano amp region). No current will flow through SET/RESET pins. Note that driving SET or RESET high will increase consumption due to integrated pulldown resistors.
Turning Relay on/off:
Drive ZZ pin high. Device will go out of sleep mode (current consumption will be in microamp region).
To turn the relay on: Drive SET pin to VCC voltage (3V), drive RESET pin low at the same time.
To turn the relay off: Drive RESET pin to VCC voltage (3V), drive SET pin low at the same time.
Wait for 10ms to give the relay time to switch. You can also monitor the FB (feedback) pin. It will go high as soon as the relay is on, and low when it is off.
Then repeat sleep procedure from above to enter sleep mode again.
Availability
Datasheet
- Total power consumption in sleep mode: less than 35nA typical @ 3V, max 120nA
- Total power consumption while switching: 33mA typical @ 3V
- Relay min VCC: 2.25V
- Relay max VCC: 3.15V
- Relay nominal VCC: 3V
- Relay coil resistance: 90 Ohm ± 10%
- Relay driving pulse time: 10ms
- Relay contact ratings:
Maximum Switching Power 60 W, 125 VA
Maximum Switching Voltage 220 VDC, 250 VAC
Maximum Switching Current 2 A
Maximum Carrying Current 2 A - Dimensions: 32.4mm x 28mm
- Mounting hole drill size: 2.1mm
- High voltage 3 pin screw terminal: 3.5mm pitch, 24-18 AWG, 1.0 mm²
- Low voltage 6 pin connector: JST XH 2.50mm pitch
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