ZHCSDF4F May 2014 – March 2018 DRV2604L
PRODUCTION DATA.
The DRV2604L device is a low-voltage haptic driver that relies on the back-EMF produced by an actuator to provide a closed-loop system that offers extremely flexible control of LRA and ERM actuators over a shared I2C-compatible bus or PWM input signal. This schema helps improve actuator performance in terms of acceleration consistency, start time, and brake time.
The improved smart-loop architecture inside the DRV2604L device provides effortless auto-resonant drive for LRA, as well as feedback-optimized ERM drive allowing for automatic overdrive and braking. These features create a simplified input waveform paradigm as well as reliable motor control and consistent motor performance. The DRV2604L device also features an automatic transition to open-loop operation in the event that an LRA actuator is not generating a valid back-EMF voltage and automatic synchronization with the LRA when the LRA is generating a valid back-EMF voltage. The DRV2604L device also allows for open-loop driving by using internally-generated PWM.
The DRV2604L device includes enough integrated RAM to allow the user to preload over 100 customized waveforms. The waveforms can be instantly played back through an I2C or can be triggered through a hardware trigger pin. Additionally, the real-time playback mode allows the host processor to bypass the memory playback engine and play waveforms directly from the host through the I2C.
The DRV2604L device features a trinary-modulated output stage that provides more efficiency than linear-based output drivers.