햅틱 모터 드라이버 -DA7282
(HAPTIC 3 CLICK)
개요
- 본 제품은 햅틱 모터 드라이버 -DA7282입니다.
- LRA(linear resonant actuator) 및 ERM( eccentric rotating mass) 햅틱 드라이버 DA7282 기반으로 디자인된 제품입니다.
- 햅틱 진동 인터페이스 구현에 사용이 가능하며, I2C 인터페이스를 가지고 있습니다.
특징
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HOW DOES IT WORK?
Haptic 3 Click as its foundation uses the DA7282, a haptic driver capable of driving both LRA and ERM actuators from Dialog Semiconductor. The power-optimized architecture and advanced closed-loop digital algorithms achieve a high-fidelity haptic drive. The DA7282 features frequency control within an onboard Waveform Memory and three distinct general-purpose inputs for triggering up to six specific sequences, which helps with emulating button pressing in many applications.
The device controls drive levels based on the sequence selected by the I2C interface across the load and senses the movement of the actuator. The driven waveform is generated by a current regulated loop using a high-frequency PWM modulation. The differential output drive features a switching regulator architecture with an H-bridge differential drive across the load at 187.5kHz. The DA7282 is also capable of closed-loop actuator monitoring while driving to enable calibration-free playback, frequency tracking (LRA only), Active Acceleration, Rapid Stop, and actuator diagnostics.
Resonant frequency tracking can be enabled while driving an LRA to track the mechanical resonance of the actuator through closed-loop control or can be disabled to operate DA7282 in open-loop wideband frequency operation while driving LRAs with a broader bandwidth frequency response. Also, Active Acceleration and Rapid Stop features enable automated driving of both ERM and LRA loads (when frequency tracking is enabled), which reduces the time to reach the target acceleration level and the time for the actuator to come to a complete stop.
Although it can use both mikroBUS™ power rails for regular power supply, its digital part requires a voltage level of 1.8V to work correctly. Therefore, a small regulating LDO is used, the BH18PB1WHFV, providing a 1.8V out of both 5V and 3.3V mikroBUS™ power rails, alongside Enable feature through the EN pin routed to the CS pin of the mikroBUS™ socket offering a switch operation to turn ON/OFF power delivery to the connected load.
Haptic 3 Click communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of 400kHz. Since the sensor for communication requires a logic level of 1.8V, this Click board™ also features the PCA9306 voltage-level translator. The I2C interface bus lines are routed to the voltage-level translators allowing this Click board™ to work with both 3.3V and 5V MCUs properly. Also, it uses an interrupt pin, marked as IRQ and routed to the INT pin of the mikroBUS™ socket, used for when a different fault condition occurs to alert the MCU.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library that contains easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
Type Haptic Applications Can be used for indicator systems, training equipment/simulators with haptics function, robotics and mechatronics, and more On-board modules DA7282 - haptic driver capable of driving both LRA and ERM actuators from Dialog Semiconductor Key Features LRA or ERM drive capability, automatic LRA resonant frequency tracking, wideband LRA support, three GPI pins for triggering of up to six independent haptic sequences, Active Acceleration and Rapid Stop technology for high-fidelity haptic feedback, low power consumption, and more Interface I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V