Texas Instruments TPS61165DRVR

Overview

TPS61165DRVR from Texas Instruments is a high-brightness white LED driver IC implementing a 1.2-MHz fixed-frequency boost converter with integrated 1.2-A/40-V N-channel MOSFET switch, 200-mV ±2% feedback reference, and dual-mode brightness control (PWM or EasyScale™ one-wire digital) via the CTRL pin. It drives up to 8 series white LEDs from 3–18 V input in industrial HMI, thermostat displays, and video surveillance cameras.

For engineers reviewing the TPS61165DRVR datasheet, TPS61165DRVR pinout, TPS61165DRVR application, or TPS61165DRVR equivalent, key selection considerations include open-LED protection threshold (38 V), thermal pad-equipped 2 mm × 2 mm WSON-6 package, 38-V OVP detection on SW pin, and absence of audible capacitor noise due to non-bursting current regulation.

Technical Context

The TPS61165DRVR uses current-mode control with built-in slope compensation for stable operation above 40% duty cycle. Its error amplifier regulates FB to 200 mV with 240–400 μ℧ transconductance and 500 kHz crossover frequency (with 5 pF COMP capacitor), enabling precise LED current setting via external R_set.

Open-LED protection monitors both SW voltage (>37 V) and FB voltage (<100 mV) for 8 consecutive switching cycles before disabling the FET. Thermal shutdown activates at 160°C with 15°C hysteresis, and undervoltage lockout engages below 2.2 V with 70 mV hysteresis.

Key Specifications

Pinout & Package

TPS61165DRVR is housed in a thermally enhanced 6-pin WSON package (2.00 mm × 2.00 mm × 0.80 mm) with an exposed thermal pad requiring solder connection to PCB ground plane for optimal thermal performance (R_θJA = 80.7°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar white LED driver applications.

Compared with TPS61165DRVR, TPS61161DRVR offers identical form factor but reduced protection features, while MAX16832ATA+T provides higher switching frequency and current capability at the expense of requiring external dimming control infrastructure.

Availability

TPS61165DRVR is available at Aetrix Electronics and suitable for industrial HMI panels, video surveillance cameras, and refrigerator control panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS61165DRVR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS61165 product line delivers high-efficiency, thermally robust LED drivers for space-constrained applications where reliability under open-circuit fault conditions and silent operation are mandatory design requirements.

FAQ

What is the package type and thermal pad requirement for TPS61165DRVR?

The TPS61165DRVR uses a 6-pin WSON package (2.00 mm × 2.00 mm × 0.80 mm) with an exposed thermal pad. This pad must be soldered directly to the PCB's analog ground plane using multiple thermal vias to achieve the specified R_θJA of 80.7°C/W. Failure to connect the thermal pad results in excessive junction temperature and premature thermal shutdown during continuous 350 mA operation.

How does TPS61165DRVR implement open-LED protection?

The TPS61165DRVR implements open-LED protection by simultaneously monitoring SW pin voltage (>37 V) and FB pin voltage (<100 mV) for eight consecutive 1.2-MHz switching cycles. When both conditions persist, the internal FET disables and the device enters shutdown. Recovery requires toggling the CTRL pin. This dual-threshold method prevents false triggers during transient overvoltage events while ensuring fast response to actual LED string disconnection.

Can TPS61165DRVR drive more than 8 white LEDs in series?

No. The TPS61165DRVR's 38-V open-LED protection threshold and 40-V switch rating constrain practical operation to ≤8 series white LEDs (assuming typical V_f ≤3.5 V per LED). Exceeding this count risks violating absolute maximum ratings during open-circuit faults. For 10+ LED strings, TI recommends the TPS61169 or discrete boost + external OVP solutions.

What is the minimum R_set value supported by TPS61165DRVR?

The TPS61165DRVR supports R_set values down to 0.17 Ω, enabling maximum LED currents up to ~1.18 A (200 mV / 0.17 Ω). However, the 1.2-A switch current limit and thermal limits restrict continuous operation to ≤350 mA in the WSON-6 package at +85°C ambient. Lower R_set values require careful thermal design and may trigger current limiting during startup transients.

Does TPS61165DRVR require external compensation components?

Yes. The TPS61165DRVR requires a 220 nF ceramic capacitor connected between the COMP pin and GND to stabilize the feedback loop. This capacitor sets the dominant pole for the error amplifier (transconductance = 240–400 μ℧) and ensures phase margin >45° across input voltage and load variations. Omitting or undersizing this capacitor causes output voltage oscillation and LED current instability.