Texas Instruments TPS92201DRVR

Overview

TPS92201DRVR from Texas Instruments is a 1.5A synchronous buck LED driver IC designed for constant-current LED biasing in compact, battery-sensitive systems. It operates from 2.5V–5.5V input, delivers up to 1.5A output current with 100mV feedback reference, supports 1%–100% analog dimming via PWM input (20–200kHz), and achieves up to 95% efficiency at 1.5MHz switching frequency - ideal for IR LED illumination in smart doorbells and IP cameras.

For engineers reviewing the TPS92201DRVR datasheet, TPS92201DRVR pinout, TPS92201DRVR application, or TPS92201DRVR equivalent, key selection considerations include its WSON-6 package thermal performance (R_θJA = 82.6°C/W), integrated 220mΩ HS / 170mΩ LS MOSFETs, 0.1µA shutdown current, adaptive off-time peak-current control, and full protection suite (LED open/short, FB resistor fault, thermal shutdown).

Technical Context

The TPS92201DRVR implements adaptive off-time peak-current control to maintain stable 1.5MHz switching across input (2.5–5.5V), output (up to V_IN), and load (0–1.5A) variations. Its internal high-side and low-side MOSFETs eliminate external diode requirements and enable 100% duty-cycle operation for low-dropout regulation.

It supports two dimming methods: analog dimming via PWM input (1%–100% duty cycle, 20–200kHz) with proportional 1–100mV FB voltage scaling, and force-PWM mode to minimize output ripple. Protection includes overcurrent limiting (1.9–2.16A HS current limit), LED open/short detection, FB resistor fault sensing, and thermal shutdown (150°C rising threshold).

Key Specifications

Pinout & Package

TPS92201DRVR uses the 2mm × 2mm WSON-6 (DRV) package with exposed thermal pad for enhanced power dissipation. Pin mapping is validated per TI SLVSH40B Rev. AUGUST 2024.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92201DRLR, TPS92201DRVR offers superior thermal performance in space-constrained designs, while TPS92201ADRVR trades slightly higher active current for improved light-load efficiency - making TPS92201DRVR optimal for fixed-full-load, low-noise IR illumination.

Availability

TPS92201DRVR is available at Aetrix Electronics and suitable for smart home camera, video doorbell, and IP security lighting applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for TPS92201DRVR 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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability LED driver design.

The TPS92201 product line delivers compact, efficient synchronous buck LED drivers optimized for battery-powered imaging and security systems - emphasizing low shutdown current, integrated protection, and minimal external component count.

FAQ

What is the maximum output current capability of the TPS92201DRVR?

The TPS92201DRVR delivers a guaranteed constant output current of 1.5A. This rating is supported across the full operating temperature range (–40°C to +85°C ambient) and input voltage range (2.5V to 5.5V), with internal high-side current limiting set at 1.9–2.16A to provide margin against transient overload. The TPS92201DRVR maintains this current accuracy via its 100mV ±5% feedback reference and integrated MOSFETs.

Does the TPS92201DRVR support analog dimming, and how is it implemented?

Yes, the TPS92201DRVR supports precise analog dimming via its PWM input pin. A 20–200kHz PWM signal applied to the PWM pin scales the internal feedback reference voltage linearly from 1mV to 100mV, which directly adjusts LED current from 1% to 100% of the full-scale 1.5A setting. This method avoids audible noise and provides high-resolution brightness control without requiring external DACs or current-sink transistors.

What package type and thermal characteristics does the TPS92201DRVR use?

The TPS92201DRVR uses the 2mm × 2mm WSON-6 (DRV) package with an exposed thermal pad. Its junction-to-ambient thermal resistance (R_θJA) is 82.6°C/W under standard JEDEC conditions, enabling reliable 1.5A operation without external heatsinking in typical 2-layer PCB layouts. Thermal shutdown activates at 150°C junction temperature, with automatic recovery once temperature falls below the hysteresis threshold.

How does the TPS92201DRVR handle LED open-circuit or short-circuit faults?

The TPS92201DRVR detects LED open circuits by monitoring the FB pin voltage drop toward 0V, causing the high-side switch to remain on and V_OUT to rise to V_IN. For LED shorts, FB voltage rises rapidly to V_OUT, triggering minimum-on-time switching. Both conditions halt regulated current delivery and prevent damage - no external fault-handling circuitry is required for basic protection in the TPS92201DRVR.

Can the TPS92201DRVR operate with input voltages close to the LED forward voltage?

Yes, the TPS92201DRVR supports 100% duty-cycle operation, allowing it to regulate LED current even when V_IN is only marginally above V_LED + V_FB (i.e., ~1.9V minimum for a 1.8V IR LED). In this mode, the high-side MOSFET remains continuously on while the low-side FET is disabled, minimizing conduction loss and enabling efficient low-dropout biasing - a key advantage over non-synchronous or fixed-duty-cycle alternatives.