Texas Instruments TPS54200DDCR

Overview

TPS54200DDCR from Texas Instruments is a 1.5-A synchronous buck LED driver IC with 4.5–28-V input range, integrated 150-mΩ high-side and 70-mΩ low-side MOSFETs, fixed 600-kHz switching frequency, and dual dimming support (analog and PWM) for mono-color or IR LED arrays in security cameras and smart locks.

For engineers reviewing the TPS54200DDCR datasheet, TPS54200DDCR pinout, TPS54200DDCR application, or TPS54200DDCR equivalent, key selection criteria include its shutdown-and-latch protection mode, 200-mV/100-mV selectable FB reference, thermal shutdown at 150°C, and SOT-23-THIN (6-pin) package compatibility with space-constrained night-vision systems.

Technical Context

The TPS54200DDCR employs peak-current-mode control with internal slope compensation to ensure stable operation across 1%–100% PWM dimming duty cycles and prevent subharmonic oscillation. Its error amplifier features 240 µA/V transconductance and internal frequency compensation, eliminating external compensation components.

It implements cycle-by-cycle high-side current limiting (ILIM_HS1 = 3 A typ., ILIM_HS2 = 1.4 A typ.) and low-side sink/source current limits (1.7 A / 3.3 A typ.), alongside dedicated LED-open/short and sense-resistor-open/short fault detection circuits that trigger shutdown-and-latch behavior.

Key Specifications

Pinout & Package

TPS54200DDCR uses a 6-pin SOT-23-THIN package (1.6 mm × 2.9 mm), optimized for high-power-density LED driver layouts with minimal PCB footprint and thermal resistance (R_θJA = 89.2°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS54200DDCR, TPS54201DDCR offers automatic fault recovery but sacrifices fail-safe latching, while LM3409QMYX/NOPB provides design flexibility at the cost of board area, component count, and deep-dimming capability.

Availability

TPS54200DDCR is available at Aetrix Electronics and suitable for IP network cameras, video doorbells, and electronic smart locks requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for TPS54200DDCR 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 power conversion solutions.

The TPS54200 product line delivers compact, protected LED drivers for vision systems, targeting IR illumination in security, access control, and consumer IoT devices where size, efficiency, and fault resilience are critical.

FAQ

What protection features does the TPS54200DDCR provide?

The TPS54200DDCR integrates LED-open and LED-short protection, sense-resistor-open and sense-resistor-short detection, thermal shutdown at 150°C, input UVLO with 470-mV hysteresis, and shutdown-and-latch mode for persistent faults. These protections activate independently and force the TPS54200DDCR into a non-recovering state until VIN is cycled, ensuring robust operation in unattended deployments like outdoor security cameras.

How does analog dimming work on the TPS54200DDCR?

Analog dimming on the TPS54200DDCR is implemented by applying a PWM signal to the PWM pin: the internal reference voltage scales linearly from 205 mV down to 0 mV as the duty cycle decreases from 100% to 0%. This allows the TPS54200DDCR to regulate LED current continuously without flicker, achieving smooth brightness control from full output down to 1% intensity with no audible noise or EMI spikes.

What is the difference between TPS54200DDCR and TPS54201DDCR?

The TPS54200DDCR and TPS54201DDCR share identical electrical specifications, pinout, and package, but differ exclusively in fault-handling behavior: the TPS54200DDCR enters shutdown-and-latch mode upon overcurrent, overvoltage, or thermal fault, while the TPS54201DDCR uses auto-retry mode with configurable delay cycles. No other functional or parametric differences exist between the two variants.

Can the TPS54200DDCR drive multiple LED strings in parallel?

The TPS54200DDCR is designed for single-string or multi-string mono-color or IR LED configurations connected in series-not parallel. Driving parallel strings would require individual current-sense resistors and separate FB paths, which the TPS54200DDCR does not support. For multi-string operation, use one TPS54200DDCR per string or select a multi-channel driver such as the TPS61165.

What is the minimum recommended input capacitance for TPS54200DDCR?

Texas Instruments recommends ≥10 µF ceramic input capacitance (X5R/X7R) placed as close as possible to the VIN and GND pins of the TPS54200DDCR to suppress high-frequency switching noise and stabilize the input rail during load transients. A 22-µF capacitor is commonly used in reference designs to ensure margin under worst-case 28-V, 1.5-A step-load conditions.