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Texas Instruments TPS54201DDCT
- Part No.:
- TPS54201DDCT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS54201DDCT.pdf
- Description:
- IC REG BUCK ADJ 1.5A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:473
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Product details
Overview
TPS54201DDCT from Texas Instruments is a 1.5-A synchronous buck LED driver IC optimized for mono-color and infrared (IR) LED applications, featuring 4.5–28-V input range, integrated 150-mΩ high-side/70-mΩ low-side MOSFETs, fixed 600-kHz switching frequency, and dual dimming modes (analog and PWM). It delivers precise current regulation with 200-mV feedback reference in analog dimming mode and 100-mV in PWM dimming mode, enabling deep dimming down to 1% duty cycle - ideal for IP network cameras and night vision systems.
For engineers reviewing the TPS54201DDCT datasheet, TPS54201DDCT pinout, TPS54201DDCT application, or TPS54201DDCT equivalent, key selection considerations include its auto-retry fault protection (vs. latch-off in TPS54200), SOT-23-THIN (6-pin) package footprint, 2-μA shutdown current, LED-open/short and sense-resistor fault detection, and thermal shutdown at 150°C.
Technical Context
The TPS54201DDCT 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 uses transconductance architecture (240 μA/V typical) with internal frequency compensation, eliminating external compensation components.
It implements two distinct current-limit thresholds: ILIM_HS1 = 2.4–3.6 A for PWM dimming or analog dimming with >25% duty cycle, and ILIM_HS2 = 1.0–1.8 A for analog dimming with <25% duty cycle - enabling robust overcurrent protection while preserving dimming linearity at low light levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports wide-range industrial and automotive power rails without pre-regulation. |
| Output Current | 1.5 A continuous - drives single- or multi-string IR/mono-color LEDs in security cameras and smart locks. |
| Switching Frequency | Fixed 600 kHz (480–700 kHz typical) - balances efficiency, EMI, and inductor size for compact designs. |
| Feedback Reference | 200 mV (ADIM mode) / 100 mV (PWM dimming mode) - enables precise current sensing with low RSENSE values (e.g., 0.1 Ω). |
| Shutdown Current | 2 µA typical - minimizes standby power in battery-backed or always-on vision systems. |
| Fault Protection | Auto-retry thermal, LED open/short, sense-resistor open/short - recovers automatically after fault clearance without host intervention. |
| Package | SOT-23-THIN (6-pin), 1.6 mm × 2.9 mm - ultra-compact footprint compatible with space-constrained PCB layouts. |
Pinout & Package
SOT-23-THIN (6-pin) package with 1.6 mm × 2.9 mm body size and 0.95 mm height; thermally enhanced for 125°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary return path for high-side/low-side switch currents and FB feedback loop; must connect to low-impedance PCB ground plane. |
| SW (Pin 2) | Switching node | Connects to inductor and diode/capacitor output filter; carries high dv/dt and high-frequency ripple - requires short, low-inductance routing. |
| VIN (Pin 3) | Main power input | Supplies internal LDOs and power stage; requires local 10-µF ceramic input capacitor placed near pin. |
| FB (Pin 4) | Current-sense feedback | Monitors voltage across RSENSE; regulates LED current by comparing to 200-mV (ADIM) or 100-mV (PWM) internal reference. |
| PWM (Pin 5) | Dimming control input | Accepts 0–6 V logic signal; determines dimming mode (ADIM vs. PWM) and sets analog reference proportional to duty cycle (1–100%). |
| BOOT (Pin 6) | Bootstrap supply | Drives high-side MOSFET gate via external 0.1-µF ceramic capacitor between BOOT and SW; critical for proper high-side conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 150-mΩ high-side + 70-mΩ low-side MOSFETs enable 1.5-A continuous output with no external switches required. |
| Dual Dimming Architecture | Supports both analog dimming (reference scales linearly with PWM duty cycle) and PWM dimming (fixed 100-mV reference, LED ON/OFF toggling) - selectable via same PWM pin. |
| Deep Dimming Capability | Operates reliably down to 1% PWM duty cycle in analog dimming mode, enabling smooth low-light control in night vision applications. |
| Auto-Retry Fault Recovery | Thermal, overvoltage, overcurrent, and open-loop faults trigger automatic restart after fixed delay (e.g., 32,768 cycles for thermal), avoiding system lockup. |
| Comprehensive Fault Detection | Detects LED open/short, sense-resistor open/short, and thermal events - all with dedicated protection circuitry independent of microcontroller supervision. |
Applications
| IP Network Camera | Analog Security Camera |
|---|---|
|
Use Scenario: Driving high-intensity IR LED arrays for nighttime surveillance in variable ambient lighting conditions. IC Role / Device Role / Timing Role: Primary LED current regulator and dimming controller; manages 600-kHz switching timing and PWM-synchronized current modulation. Use Value: Enables consistent 1–100% brightness control with <1% dimming resolution and auto-retry recovery during thermal stress from prolonged IR illumination. |
Use Scenario: Powering mono-color LED illuminators in legacy analog CCTV systems with limited digital control interface. IC Role / Device Role / Timing Role: Standalone analog-dimming LED driver accepting simple PWM input; replaces discrete transistor-based solutions with integrated protection. Use Value: Eliminates need for external current-sense amplifiers and fault-handling logic while maintaining compatibility with existing analog camera control signals. |
| Video Doorbell | Embedded Camera System |
|
Use Scenario: Compact IR illumination for battery-powered video doorbells requiring ultra-low quiescent current and thermal resilience. IC Role / Device Role / Timing Role: Efficient buck converter with 2-μA shutdown current and auto-retry thermal management; synchronizes LED current to motion-triggered PWM bursts. Use Value: Extends battery life via minimal standby draw and avoids firmware-level fault handling - critical for sealed, unattended devices. |
Use Scenario: Integrated LED backlight or indicator driver in space-constrained embedded vision modules (e.g., robotics, drones). IC Role / Device Role / Timing Role: Single-chip LED power solution with SOT-23-THIN footprint; handles current regulation, dimming, and fault response without external ICs. Use Value: Reduces BOM count by 4+ components (MOSFETs, driver, sense amp, protection logic) while delivering 1.5-A drive capability in <4.7 mm² area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54200DDCT | Latch-off (not auto-retry) fault protection; identical pinout, specs, and dimming behavior otherwise. | Preferred where system-level fault escalation (e.g., MCU-initiated shutdown) is required instead of autonomous recovery. | Select TPS54200DDCT only if latch-off behavior aligns with safety-critical system architecture. |
| LM3409QMYX/NOPB | Adjustable 200–2000 kHz frequency; external MOSFET drive; no integrated power FETs; requires external compensation. | Better suited for high-voltage (>40 V) or high-current (>2 A) LED strings where flexibility outweighs integration. | Choose LM3409QMYX/NOPB when design requires >28-V input, >1.5-A output, or programmable switching frequency. |
Compared with TPS54201DDCT, TPS54200DDCT offers identical performance but latches off permanently on fault - requiring external reset - while LM3409QMYX/NOPB trades integration for configurability, demanding more external components but supporting higher voltage/current and adjustable frequency.
Availability
TPS54201DDCT is available at Aetrix Electronics and suitable for IP network cameras, analog security cameras, and video doorbells requiring stable component supply, long-term lifecycle support, and automotive-grade reliability under thermal stress.
Supply support for TPS54201DDCT 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 ICs.
The TPS5420x product line was designed specifically for compact, efficient, and fault-resilient LED driving in vision and illumination systems - emphasizing deep dimming, integrated protection, and minimal external component count.
FAQ
What dimming modes does the TPS54201DDCT support, and how are they selected?
The TPS54201DDCT supports both analog dimming (ADIM) and PWM dimming modes, selected automatically based on the voltage level applied to the PWM pin. When VPWM rises above 1.97 V (typical), it enters ADIM mode where the internal reference voltage scales linearly with PWM duty cycle from 1% to 100%. When VPWM falls below 0.9 V (typical), it switches to PWM dimming mode with a fixed 100-mV feedback reference and LED current toggled ON/OFF per PWM cycle. This dual-mode operation is implemented entirely within the TPS54201DDCT without external configuration.
How does the TPS54201DDCT handle overcurrent or thermal faults?
The TPS54201DDCT implements auto-retry protection: upon detecting thermal shutdown (≥150°C), overvoltage, overcurrent, or open-loop conditions, it disables switching and waits a fixed number of cycles (e.g., 32,768 cycles for thermal) before attempting automatic restart. This behavior differs from the TPS54200DDCT's latch-off mode. The TPS54201DDCT continues this retry sequence until the fault condition clears - ensuring autonomous recovery in transient overload scenarios without host MCU involvement.
What is the minimum recommended RSENSE value for the TPS54201DDCT, and why?
The minimum recommended RSENSE is 0.067 Ω, calculated using the 100-mV feedback reference in PWM dimming mode and maximum 1.5-A output: RSENSE = 0.1 V / 1.5 A ≈ 0.067 Ω. Using a smaller resistor risks violating the 100-mV minimum FB voltage specification during full-load PWM dimming, potentially causing regulation loss or instability. The TPS54201DDCT's dual-reference architecture (200 mV in ADIM, 100 mV in PWM) allows flexible RSENSE selection - but 0.067 Ω ensures margin across both modes and temperature variation.
Can the TPS54201DDCT drive multiple LED strings in parallel?
No - the TPS54201DDCT is designed for single-string mono-color or IR LED operation with a single sense resistor. Driving parallel LED strings without individual current regulation leads to current imbalance due to VF mismatch, risking thermal runaway and premature failure. For multi-string applications, separate TPS54201DDCT channels or a matrix-driven architecture with individual current control per string is required. The TPS54201DDCT's FB pin monitors only one current path and lacks multi-channel synchronization features.
What is the purpose of the BOOT pin, and what capacitor value is required?
The BOOT pin supplies gate drive voltage to the internal high-side MOSFET via a bootstrap circuit. A 0.1-µF X7R ceramic capacitor must be placed between BOOT and SW pins to provide charge storage during low-side conduction. This capacitor replenishes the gate drive voltage each switching cycle; undersizing causes high-side FET turn-on failure and excessive heating. The TPS54201DDCT's internal boot regulator requires this external capacitor to maintain reliable 600-kHz switching - and its placement must be adjacent to the IC with minimal trace length to minimize parasitic inductance.
TPS54201DDCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Buck
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- 28V
- Current - Output / Channel:
- 1.5A
- Frequency:
- 600kHz
- Dimming:
- PWM
- Applications:
- LED Display and Lighting, IR LED for Day or Night Vision
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS54201DDCT FAQ
1.How can I place an order for TPS54201DDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54201DDCT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS54201DDCT reliable?
The price and inventory of TPS54201DDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54201DDCT is usually 5 days.
3.What payment methods are accepted for TPS54201DDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54201DDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54201DDCT?
TPS54201DDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54201DDCT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS54201DDCT?
For technical support, including TPS54201DDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54201DDCT requirements.
6.How does Aetrix verify that TPS54201DDCT is sourced from the original manufacturer or authorized distributors?
All TPS54201DDCT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS54201DDCT meets industry standards.
7.What is the process for return or replacement of TPS54201DDCT?
All TPS54201DDCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS54201DDCT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS54201DDCT part is unused and in its original packaging.
Return procedure for TPS54201DDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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