DA7280 LRA/ERM Haptic Driver with Multiple Input Triggers, Integrated Waveform Memory and Wideband Support General Description DA7280 is a linear resonant actuator (LRA) and eccentric rotating mass (ERM) haptic driver offering automatic closed-loop LRA resonant frequency tracking. The feature guarantees consistency across LRA production tolerances, operating temperature, aging, and mechanical coupling. DA7280 offers wideband operation that fully utilizes the capabilities of newer wideband and multi-directional LRAs. The differential output drive architecture and continuous actuator motion sensing enable efficient, calibration-free playback and minimize software complexity. Featuring wake-up on General Purpose 2 Input (GPI) sequence triggers and/or I C activity, DA7280 automatically returns to a low quiescent current state (typically 0.36 A) between playbacks. At only 20 % of the idle current of the nearest alternative solution, DA7280 significantly extends battery life in mobile systems. To reduce system complexity, an integrated Waveform Memory allows haptic sequences to be pre- loaded to DA7280. Independent sequences can be triggered, with low-latency (0.75 ms), by up to three separate input pins without host interaction. Haptic sequences can also be streamed to 2 DA7280 from an external source via I C or pulse width modulated (PWM) signal. DA7280 actively monitors the back electromotive force (BEMF) while continuously driving and applies closed-loop Active Acceleration and Rapid Stopping for sharper clicks and a higher fidelity user experience. This offers significant advantages over existing solutions that need to move into a high-impedance state during drive to measure the BEMF, which adds a considerable amount of inactive time to the sequence and lowers the effective click strength for a given LRA. Key Features LRA or ERM drive capability No software requirements with embedded operation Automatic LRA resonant frequency tracking Differential PWM output drive Wideband LRA support Current driven system to deliver constant 2 I C and PWM input streaming actuator power 2 Low latency (0.75 ms) I C/GPI wake-up Configurable EMI suppression from low power consumption IDLE state, I = 0.36 A Automatic short circuit protection Q Ultra-low latency (0.15 ms) wake-up from Ultra-low power consumption, IQ = 0.36 A, STANDBY state, I = 0.8 mA with state retention in IDLE state Q Three GPI pins for triggering of up to six Supply monitoring, reporting, and automatic independent haptic sequences output limiting On-board Waveform Memory with amplitude, Open- and closed-loop modes time, and frequency control Custom wave drive support Active Acceleration and Rapid Stop Small solution footprint requiring only one technology for high-fidelity haptic feedback decoupling capacitor in both WLCSP and QFN Actuator diagnostics and fault handling VDDIO VDD Applications Over- SCL Battery 2 I C References Temperature Monitor SDA Protection Smartphones, wearables, and hearables nIRQ BEMF Sensing and Computer peripherals Actuator Diagnostics Resonant Frequency OUTP Gaming Tracking, ERC Driver Active Automotive and industrial Acceleration, GPI 0 / PWM Short Circuit LRA/ Rapid Stop, Protection ERM and Virtual and augmented reality controllers GPI 1 Waveform ERC Driver Memory Television remote control OUTN GPI 2 DA7280 GND Datasheet Revision 3.0 30-Jul-2019 CFR0011-120-00 1 of 76 2019 Dialog Semiconductor Regulation Loop DA7280 LRA/ERM Haptic Driver with Multiple Input Triggers, Integrated Waveform Memory and Wideband Support System Diagrams VDDIO VBAT VDDIO VBAT VDDIO VDD VDDIO VDD OUTP OUTP SDA SDA SCL SCL nIRQ nIRQ LRA/ LRA/ Host DA7280 ERM Host DA7280 ERM GPI 0/PWM GPI 0/PWM GPI 1 OUTN GPI 1 OUTN GPI 2 GPI 2 GND GND 2 2 GPI and I C I C Only VDDIO VBAT VDDIO VBAT VDDIO VDD VDDIO VDD OUTP OUTP SDA SDA SCL SCL nIRQ nIRQ LRA/ LRA/ Host Host DA7280 ERM DA7280 ERM GPI 0/PWM GPI 0/PWM GPI 1 GPI 1 OUTN OUTN GPI 2 GPI 2 GND GND PWM Only Embedded Operation VBAT External Boost VBST up to 5.5V VDDIO VBAT VDDIO VDDIO VDD VDDIO VDD OUTP OUTP Host SDA SDA (startup SCL SCL only) nIRQ nIRQ LRA/ LRA/ DA7280 ERM Host DA7280 ERM Sensor Hub or Button GPI 0/PWM GPI 0/PWM Press GPI 1 OUTN GPI 1 OUTN Detect GPI 2 GPI 2 GND GND Embedded Operation External Boost No Host Operation Figure 1: System Diagrams Datasheet Revision 3.0 30-Jul-2019 CFR0011-120-00 2 of 76 2019 Dialog Semiconductor