Packaging information
| Package | Pins VQFN (RGP) | 20 |
| Operating temperature range (°C) -40 to 70 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the DRV8662
- High-Voltage Piezo Haptic Driver
- Drives up to 100 nF at 200 V PP and 300 Hz
- Drives up to 150 nF at 150 V PP and 300 Hz
- Drives up to 330 nF at 100 V PP and 300 Hz
- Drives up to 680 nF at 50 V PP 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 3.3 V to 5.5 V
- 1.8 V Compatible Digital Pins
- Thermal Protection
- Available in a 4 mm × 4 mm × 0.9 mm QFN package (RGP)
Description for the DRV8662
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 R EXT resistor. The boost converter architecture will not allow the demand on the supply current to exceed the limit set by the R EXT 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.