Piezo Haptic Driver with Integrated Boost Converter
Product details
Parameters
Package | Pins | Size
Features
- High-Voltage Piezo Haptic Driver
- Drives up to 100 nF at 200 VPP and 300 Hz
- Drives up to 150 nF at 150 VPP and 300 Hz
- Drives up to 330 nF at 100 VPP and 300 Hz
- Drives up to 680 nF at 50 VPP and 300 Hz
- Differential Output
- Integrated Boost Converter
- Adjustable Boost Voltage
- Adjustable Current Limit
- Integrated Power FET and Diode
- No Transformer Required
- Fast Start Up Time of 1.5 ms
- Wide Supply Voltage Range of 3.0 V to 5.5 V
- 1.8V Compatible Digital Pins
- Thermal Protection
- Available in a 4 mm × 4 mm × 0.9 mm QFN package (RGP)
Description
The DRV8662 is a single-chip piezo haptic driver with integrated 105 V boost switch, integrated power diode, and integrated fully-differential amplifier. This versatile device is capable of driving both high-voltage and low-voltage piezo haptic actuators. The input signal can be either differential or single-ended. The DRV8662 supports four GPIO-controlled gains: 28.8 dB, 34.8 dB, 38.4 dB, and 40.7 dB.
The boost voltage is set using two external resistors, and the boost current limit is programmable via the REXT resistor. The boost converter architecture will not allow the demand on the supply current to exceed the limit set by the REXT resistor; therefore, the DRV8662 is well-suited for portable applications. This feature also allows the user to optimize the DRV8662 circuit for a given inductor based on the desired performance requirements.
A typical start-up time of 1.5 ms makes the DRV8662 an ideal piezo driver for fast haptic responses. Thermal overload protection prevents the device from being damaged when over driven.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | Piezo-Haptic Driver with Integrated Boost Converter. datasheet (Rev. B) | Jul. 01, 2014 |
| User guides | DRV8662 Piezo Haptics Driver Evaluation Module (RevD Silicon) (Rev. B) | Mar. 09, 2016 | |
| Application notes | DRV8662, DRV2665, and DRV2667 Configuration Guide | Sep. 05, 2014 | |
| User guides | DRV8662, DRV2665, and DRV2667 Design Equations (Rev. A) | Aug. 21, 2014 | |
| More literature | Automotive Haptics Solutions | Sep. 16, 2013 | |
| Technical articles | Live from CES 2013 - HD haptic mobile devices | Jan. 09, 2013 | |
| Application notes | High-definition haptics: Feel the difference! | Jul. 17, 2012 | |
| Technical articles | CES 2012 Preview: Haptics and Touch Screen Controllers | Dec. 31, 2011 | |
| Technical articles | TI grabs 14 spots on EDN Hot 100 Products of 2011 list. | Nov. 16, 2011 | |
| Technical articles | TI claims 14 of EDN's Hot 100 Products of 2011 | Nov. 15, 2011 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
Design tools & simulation
Features
- Piezo actuator model recommendation
- Boost voltage and forward voltage calculation
- Feedback resistor and boost current limit resistor values calculation
- Current requirements approximation
- Input capacitor and output capacitor capability calculation
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| QFN (RGP) | 20 | View options |
Ordering & quality
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