DA7283

Ultra-Low Power LRA Haptic Driver with

Multiple Input Triggers and Software-Free

Operation

Datasheet

Revision 3.1

10-Feb-2022

CFR0011-120-00

13 of 26

© 2022 Renesas Electronics

control. This ensures optimal output acceleration on every individual LRA throughout its lifetime and

consistent part-to-part haptic feedback in the final product.

Ultra-Low Power Consumption when Disabled

In the OFF state when VDDIO_EN = 0 V, DA7283 has an ultra-low current consumption from the VDD

power supply, at typically 5 nA. This is the lowest power state of the device. In the OFF state the

device is fully reset and its internal state lost, see Sections 5.2.1 and 5.3.3.

Low Latency GPI Wake-Up from Low Power Consumption IDLE State

The device has low latency (0.75 ms) wake-up from IDLE state, which takes typically 0.68

µA of

current from VDD. Wake-up is triggered by GPI activity requesting playback and DA7283 returns

automatically to IDLE state after completing the requested playback. The device retains its setup in

all states (including IDLE) apart from the OFF state, see Section 5.2.1.

Three GPI Sequence Triggers

DA7283 supports up to three GPI inputs which can be used to trigger low-latency playback of three

specific effects from IDLE state. Triggering is activated on events caused by falling edges. The user

can choose to create more complex effects by modulating the GPI triggering, see Section 5.2.2.

Differential PWM Output Drive

DA7283 includes a full H-bridge differential output PWM drive that has the advantage of maximizing

the power delivered to the LRA from a given supply. This doubles the voltage swing across the

actuator and significantly increases system efficiency relative to a single transistor/LDO solution in

legacy LRA applications.

Current Driven System

The device outputs regulated current, rather than voltage, which allows BEMF tracking without the

need to stop driving to sense the BEMF. This maximizes power delivery to the actuator per unit time

when compared to voltage driven solutions, resulting in shorter and sharper haptic clicks. In addition,

constant current drive provides constant force into the actuator independently of BEMF amplitude.

Rate Control for EMI suppression

Switching node edge rate control (ERC) on the OUTP and OUTN pins reduces electromagnetic

interference (EMI) and electrical interference via capacitive coupling in the end application. This

eliminates any need for resistor-capacitor (RC) or ferrite bead filtering of the outputs, resulting in

simpler system design and a lower-cost bill of materials.

Automatic Short Circuit Protection

Automatic low-latency short circuit protection detects shorts on the OUTP and OUTN pins to supply,

ground, or between OUTP and OUTN, and protects DA7283 by forcing the H-bridge into a high-

impedance state. Once the short circuit protection is triggered, playback is stopped. The device will

then attempt to drive only at the next GPI request for playback.

Automatic Over-Temperature Protection

Automatic over-temperature protection detects when the device temperature exceeds 125

°C and

protects DA7283 by stopping playback. The device will then attempt to drive only at the next GPI

request for playback.