Texas Instruments TPS92200D1DDCR

Overview

TPS92200D1DDCR from Texas Instruments is a 1.5-A synchronous buck LED driver IC with 4-V to 30-V input range, integrated 150-mΩ high-side and 90-mΩ low-side NMOS FETs, 1-MHz switching frequency, 99-mV ±3-mV FB reference voltage, and dual PWM/analog dimming capability. It serves as the primary current-regulated power stage for IR/white LED arrays in compact vision systems.

For engineers reviewing the TPS92200D1DDCR datasheet, TPS92200D1DDCR pinout, TPS92200D1DDCR application, or TPS92200D1DDCR equivalent, key selection criteria include its SOT-23-THIN (6) package footprint, ultra-low 1-μA shutdown current, peak-current-mode control with internal compensation, 99% maximum duty cycle, and support for both digital PWM and analog voltage dimming inputs.

Technical Context

The TPS92200D1DDCR implements peak-current-mode control with internal slope compensation and full internal compensation-eliminating external loop components. Its 1-MHz fixed-frequency oscillator enables use of sub-3-mm inductors while maintaining stable regulation across 4–30-V input and wide LED string voltage ranges.

It integrates dual NMOS power switches and supports two distinct dimming modes on the same DIM pin: logic-level PWM input (100 Hz–2 kHz) for discrete ON/OFF control, and analog voltage input (0.65–1.2 V) to linearly scale the 99-mV FB reference from 5% to 100% output current-enabling precise brightness control without external DACs.

Key Specifications

Pinout & Package

SOT-23-THIN (6) package: 1.60 mm × 2.90 mm body, 0.95 mm max height, thermally enhanced pad, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS92200D2DDCR, the TPS92200D1DDCR offers broader interface flexibility with native analog voltage dimming; compared with LM3409QMHX/NOPB, it delivers lower system cost and faster time-to-market via integration-but trades off maximum voltage/current headroom.

Availability

TPS92200D1DDCR is available at Aetrix Electronics and suitable for video surveillance, facial recognition, stage lighting, medical UV-C disinfection, and industrial machine vision applications requiring stable component supply, long-term manufacturability, and automotive-grade reliability screening.

Supply support for TPS92200D1DDCR 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 TPS92200 product line was engineered specifically for space-constrained, high-efficiency constant-current LED driving in vision systems-prioritizing integration, thermal robustness, and multi-mode dimming flexibility over general-purpose DC/DC conversion.

FAQ

What dimming methods does the TPS92200D1DDCR support?

The TPS92200D1DDCR supports two independent dimming methods on its DIM pin: logic-level PWM input (100 Hz–2 kHz) for discrete brightness steps, and analog voltage input (0.65–1.2 V) to linearly scale the internal 99-mV FB reference from 5% to 100% output current. This dual-mode capability eliminates need for external dimming ICs or DACs in mixed-signal lighting systems. The TPS92200D1DDCR does not require configuration pins or I²C commands to switch between modes-the control signal type is auto-detected.

How is LED current set on the TPS92200D1DDCR?

LED current is set by an external sense resistor (R_SENSE) connected between the LED cathode and GND. Because the TPS92200D1DDCR maintains a precise 99-mV ±3-mV reference at the FB pin, the current is calculated as I_LED = 0.099 V / R_SENSE. For example, a 68-mΩ resistor sets 1.456 A. The TPS92200D1DDCR's low FB voltage minimizes power loss in R_SENSE and improves efficiency-especially critical in thermally constrained IR illumination modules.

Does the TPS92200D1DDCR require external compensation components?

No, the TPS92200D1DDCR uses peak-current-mode control with full internal compensation-no external RC networks, type-II or type-III compensators, or feedforward capacitors are needed. This simplifies layout, reduces bill-of-materials cost, and accelerates design validation. The internal compensation is optimized for stability across the full 4–30-V input range and typical 1–10-μH inductor values. The TPS92200D1DDCR achieves this without sacrificing transient response-maintaining <10-μs recovery from 50% load steps.

What protection features are built into the TPS92200D1DDCR?

The TPS92200D1DDCR includes LED open-load, LED+ short-to-GND, LED+ and LED− short-circuit, sense-resistor open/short, and thermal shutdown protections-all with auto-retry behavior. When a fault occurs (e.g., open LED string), the device enters hiccup mode: it disables switching for 60 ms (t_{RETRY_OFF}), then attempts restart for 512 cycles (t_{RETRY_ON}). This prevents thermal runaway while enabling autonomous recovery-critical for unattended systems like security cameras. The TPS92200D1DDCR also features overvoltage protection on the FB pin (1-V clamp) to prevent damage during sense-resistor failure.

What is the recommended inductor value for the TPS92200D1DDCR?

Texas Instruments recommends a 4.7-μH shielded power inductor with ≥2.5-A saturation current for typical 12-V input, 1.5-A output designs-as validated in the TPS92200D1DDCR evaluation module (EVM). Lower values (e.g., 2.2 μH) are viable with careful layout to manage peak currents and EMI; higher values (>10 μH) increase solution size and reduce transient response. The TPS92200D1DDCR's 1-MHz switching frequency allows compact magnetics-enabling full LED driver solutions under 25 mm² PCB area. Inductor DCR should be <30 mΩ to minimize conduction loss and maintain efficiency >92% at full load.