Texas Instruments DRV2665RGPR

Overview

DRV2665RGPR from Texas Instruments is a piezo haptic driver IC with integrated 105-V boost converter, fully differential high-voltage amplifier, and Immersion TS5000-compliant digital front end. It delivers up to 200 VPP differential output at 300 Hz into 100 nF loads, supports 400-kHz I²C control with 100-byte FIFO, and operates from 3.3–5.5 V supply. It enables fast-response tactile feedback in compact portable devices.

For engineers reviewing the DRV2665RGPR datasheet, DRV2665RGPR pinout, DRV2665RGPR application, or DRV2665RGPR equivalent, key selection considerations include its programmable boost voltage (15–105 V), 2-ms startup time, 1.8-V-tolerant digital interface, differential piezo drive capability, and support for both I²C waveform streaming and analog input modes.

Technical Context

The DRV2665RGPR integrates a digitally controlled boost converter with external REXT-based current limiting and resistor-divider-set output voltage, feeding a fully differential Class-AB amplifier whose gain is configurable across four levels (28.8–40.7 dB) to match actuator requirements. Its digital engine accepts 8-bit two's complement data via I²C at 8 kHz sample rate and automatically manages wake-up, playback, and pop-less shutdown.

It implements hardware-level protections including thermal shutdown (150°C junction), overcurrent clamping, brownout reset (VBOT ≈ 0.84 V), and short-circuit protection. The internal charge pump (PUMP pin) supplies gate drive for high-side switching, and the REG pin provides a regulated 1.75-V output for external logic or level-shifting.

Key Specifications

Pinout & Package

DRV2665RGPR is housed in a 4.00 mm × 4.00 mm QFN-20 package with exposed thermal pad (RGP), optimized for space-constrained portable designs and efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar piezo haptic driver applications.

Compared with DRV2667RGPR, the DRV2665RGPR provides higher piezo-specific performance and simpler configuration, while MAX20303EWL+ trades haptic fidelity for multi-rail power integration-making DRV2665RGPR optimal for dedicated, high-fidelity piezo haptic subsystems.

Availability

DRV2665RGPR is available at Aetrix Electronics and suitable for mobile phones, tablets, and touch-enabled kiosks requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for DRV2665RGPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and consumer applications.

The DRV2665RGPR belongs to TI's haptic driver product line, designed specifically to simplify high-fidelity tactile feedback implementation in battery-powered portable electronics with minimal host processor involvement.

FAQ

What is the maximum load capacitance DRV2665RGPR can drive at 200 VPP?

The DRV2665RGPR can drive up to 100 nF at 200 VPP and 300 Hz, as specified in the Electrical Characteristics table. This capability is achieved using the full 105-V boost rail and GAIN[1:0] = 11 setting. Driving larger capacitive loads at 200 VPP requires reducing frequency or output amplitude to maintain stability and avoid distortion-DRV2665RGPR's datasheet provides derating curves for 150 VPP (150 nF), 100 VPP (330 nF), and 50 VPP (680 nF) at 300 Hz.

Does DRV2665RGPR support analog input mode, and how is it configured?

Yes, DRV2665RGPR supports analog input mode via the IN+ and IN− pins. It is enabled by setting the INPUT_MUX bit in the device's control register, which routes the differential analog signal through the programmable-gain amplifier. In this mode, the EN_OVERRIDE bit must be asserted to keep the boost converter and amplifier active, and gain is selected independently using GAIN[1:0]. DRV2665RGPR maintains the same 28.8–40.7 dB gain range and bandwidth characteristics as in digital mode.

How is the boost voltage programmed on DRV2665RGPR?

The boost voltage on DRV2665RGPR is set using an external resistor divider between BST and FB pins, where VBST = VFB × (1 + R1/R2) and VFB = 1.32 V. To achieve the full 15–105 V range, R1 and R2 values must be selected accordingly-for example, R1 = 787 kΩ and R2 = 10 kΩ yields ~105 V. TI recommends R1 + R2 > 400 kΩ to minimize leakage current. DRV2665RGPR does not support digital boost voltage programming; all adjustment is analog and resistor-based.

What protection features are built into DRV2665RGPR?

DRV2665RGPR includes thermal shutdown (triggers at ~150°C junction temperature), overcurrent clamping on the boost switch, brownout reset (VBOT ≈ 0.84 V on REG pin), and short-circuit protection on the output stage. All protections operate autonomously without host intervention: thermal and overcurrent faults disable both boost and amplifier until conditions normalize, while brownout resets internal registers to default state. These features ensure robust operation during extended haptic sequences or abnormal load conditions-critical for field reliability of DRV2665RGPR in consumer devices.

Can DRV2665RGPR drive low-voltage piezo actuators, and what is the minimum boost setting?

Yes, DRV2665RGPR supports low-voltage piezo actuators down to 20 VPP using programmable boost voltages as low as 15 V. The lowest gain setting (GAIN[1:0] = 00) is optimized for 50 VPP with 30 V boost, but the device allows further reduction-for example, 25 V boost enables up to 40 VPP output. At 15 V boost, full-scale digital codes must be limited to ±102 to prevent clipping. DRV2665RGPR's flexible gain and boost control make it suitable for both high- and low-voltage piezo elements within a single platform design.