Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- DESCRIPTION
- PINOUT INFORMATION
- ABSOLUTE MAXIMUM RATINGS
- THERMAL INFORMATION
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS
- TIMING REQUIREMENTS
- TYPICAL CHARACTERISTICS
- SYSTEM DIAGRAMS
- APPLICATION INFORMATION
- ECCENTRIC ROTATING MASS MOTORS (ERM)
- LINEAR RESONANCE ACTUATORS (LRA)
- AUTO-RESONANCE ENGINE FOR LRA
- OPEN LOOP OPERATION FOR LRA
- SMART LOOP ARCHITECTURE
- AUTO CALIBRATION
- WAVEFORM LIBRARIES
- WAVEFORM SEQUENCER
- LIBRARY PARAMETERIZATION
- REAL-TIME PLAYBACK (RTP) MODE
- MULTI-MODE INPUT PIN (IN/TRIG)
- DEVICE ENABLE
- CONSTANT VIBRATION STRENGTH
- EDGE RATE CONTROL
- CAPACITOR SELECTION
- MODES OF OPERATION
- BLOCK DIAGRAM
- GENERAL I2C OPERATION
- SINGLE-BYTE AND MULTIPLE-BYTE TRANSFERS
- SINGLE-BYTE WRITE
- MULTIPLE-BYTE WRITE AND INCREMENTAL MULTIPLE-BYTE WRITE
- SINGLE-BYTE READ
- MULTIPLE-BYTE READ
- REGISTER MAP
- DEVICE PROGRAMMING
- WAVEFORM LIBRARY EFFECTS LIST
- PCB LAYOUT RECOMMENDATIONS
- Revision History
RTP (8-bit) DataFormat_RTP = 0
Input
Steady-State
Output Magnitude
RatedVoltage[7:0]
½ RatedVoltage[7:0]
PWM
Input Interface
0% 50% 100%
RTP (8-bit) DataFormat_RTP = 1
0x00
Closed Loop, BiDir_Input = 1
0x7F 0xFF
Full Braking
0x81 0x00 0x7F0x3F
0xBF
75%
DRV2605
SLOS825B –DECEMBER 2012–REVISED JANUARY 2014
www.ti.com
Closed Loop Mode, Bi-Directional
In closed loop, bi-directional mode, the gives automatic overdrive and braking for both ERM and LRA devices.
This mode preserves compatibility with data created in open-loop signaling by keeping zero drive strength at the
mid-scale value. When input values less than the mid-scale value are given, the DRV2605 will treat them the
same as the mid-scale with zero drive.
The reference level for steady-state, full-scale drive is set by the RatedVoltage[7:0] value (once auto calibration
is performed). The output voltage may momentarily exceed the rated voltage for automatic overdrive and
braking, but will not exceed the ODClamp[7:0] voltage. Braking happens automatically based on the input signal
when the back-EMF feedback determines that it is necessary. Since this mode preserves compatibility with
existing/legacy dataDRV2605 formats, yet still provides closed loop benefits, it is the default configuration at
power up.
The RTP mode has 8 bits of resolution over the I2C bus. The RTP data can be in either signed (2’s complement)
or unsigned format as defined by DataFormat_RTP.
Restrictions: This mode is compatible with all DRV2605 interfaces except for TS2200 Library A (with fixed
overdrive programming). Library A should only be used in open loop mode. Libraries B through E (no overdrive)
may take advantage of this mode for automatic overdrive and braking.
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Product Folder Links: DRV2605