1 Features

1• Flexible Haptic/Vibra Driver

– LRA (Linear Resonance Actuator)

– ERM (Eccentric Rotating Mass)

• Auto Resonance Tracking for LRA

– No Frequency Calibration Required

– Automatic Drive Commutation

– Automatic Braking Algorithm

– Wide Input PWM Frequency Range

• Constant Vibration Strength Over Supply

• Automatic Input Level Translation

• 0% to 100% Duty Cycle Control Range

• Fast Start Up Time

• Differential Drive from Single-Ended Input

• Wide Supply Voltage Range of 2.5 V to 5.2 V

• Immersion TouchSense® 3000 Compatible

• 1.8-V Compatible, 5-V Tolerant Digital Pins

• Available in a 2 mm × 2 mm × 0.75 mm Leadless

QFN Package (RUN)

2 Applications

• Mobile Phones and Tablets

• Watches and Wearable Technology

• Remote Controls, Mice, and Peripheral Devices

• Electronic Point of Sale (ePOS)

• Vibration Alerts and Notifications

• Touch-Enabled Devices

• Industrial Human-Machine Interfaces

3 Description

The DRV2603 is a haptic driver designed specifically

to solve common obstacles in driving both Linear

Resonance Actuator (LRA) and Eccentric Rotating

Mass (ERM) haptic elements. The DRV2603 is

designed for low latency, high efficiency, and more

drive strength for actuators commonly used for tactile

feedback in the portable market.

LRA actuators typically have a narrow frequency

band over which they have an adequate haptic

response. This frequency window is typically ±2.5 Hz

wide or less, so driving an LRA actuator presents a

challenge. The DRV2603 solves this problem by

employing auto resonance tracking, which

automatically detects and tracks the LRA resonant

frequency in real time. This means that any input

PWM frequency within the input range (10 kHz to 250

kHz) will automatically produce the correct resonant

output frequency. As an additional benefit, the

DRV2603 implements an automatic braking algorithm

to prevent LRA ringing at the end of waveforms,

leaving the user with a crisp haptic sensation.

For both ERM and LRA actuators, the automatic input

level translation solves issues with low voltage PWM

sources without adding additional external

components, so if the digital I/O levels vary, the

output voltage does not change. The DRV2603 also

has supply correction that ensures no supply

regulation is required for constant vibration strength,

allowing an efficient, direct-battery connection.