Datasheet

Table Of Contents

DRV2605

SLOS825B –DECEMBER 2012–REVISED JANUARY 2014

www.ti.com

Control2 (Address: 0x1C)

Bit 7 6 5 4 3 2 1 0

Function BiDir_Input BrakeStabilizer SampleTime[1] SampleTime[0] BlankingTime[1] BlankingTime[0] IDissTime[1] IDissTime[0]

Type R/W R/W R/W R/W R/W R/W R/W R/W

Default 1 1 1 1 0 1 0 1

BiDir_Input Selects the input scaling the playback engine expects.

0: Uni-directional Input Mode

Braking is automatically determined by the feedback conditions, and applied when needed. Use of this

mode also recovers an additional bit of vertical resolution. This mode should only be used for closed-

loop operation.

Examples

0% Input → No output signal

50% Input → Half-scale output signal

100% Input → Full-scale output signal

1: Bi-directional Input Mode (default)

This mode is compatible with traditional open-loop signaling, and also works well with closed-loop mode.

When operating closed-loop, braking is automatically determined by the feedback conditions, and

applied when needed. When operating open-loop modes, braking is only applied when the input signal

is less than 50%.

Open Loop Mode (ERM and LRA) Examples

0% Input → Negative full-scale output signal (braking)

25% Input → Negative half-scale output signal (braking)

50% Input → No output signal

75% Input → Positive half-scale output signal

100% Input → Positive full-scale output signal

Closed Loop Mode (ERM and LRA) Examples

0% to 50% Input → No output signal

50% Input → No output signal

75% Input → Half-scale output signal

100% Input → Full-scale output signal

BrakeStabilizer Reduces loop gain when braking is near completion to improve loop stability

SampleTime[1:0] LRA Auto Resonance Sampling Time. (Advanced use only)

0: 150 µs 2: 250 µs

1: 200 µs 3: 300 µs (default)

BlankingTime[1:0] Blanking time before the back-EMF A/D makes a conversion. (Advanced use only)

0: 15 µs (LRA), 45 µs (ERM) 2: 50 µs (LRA), 150 µs (ERM)

1: 25 µs (LRA), 75 µs (ERM), default 3: 75 µs (LRA), 225 µs (ERM)

IDissTime[1:0] Current Dissipation Time. This is the time allowed for the current to dissipate from the actuator between PWM

cycles for flyback mitigation. (Advanced use only)

0: 15 µs (LRA), 45 µs (ERM) 2: 50 µs (LRA), 150 µs (ERM)

1: 25 µs (LRA), 75 µs (ERM), default 3: 75 µs (LRA), 225 µs (ERM)

Product Folder Links: DRV2605