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Texas Instruments TPS54201DDCR
- Part No.:
- TPS54201DDCR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS54201DDCR.pdf
- Description:
- IC REG BUCK ADJ 1.5A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:11,737
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Product details
Overview
TPS54201DDCR from Texas Instruments is a 1.5-A synchronous buck LED driver IC for mono-color or infrared (IR) LED arrays, featuring 4.5–28-V input range, fixed 600-kHz switching frequency, integrated 150-mΩ high-side and 70-mΩ low-side MOSFETs, and dual analog/PWM dimming with 200-mV/100-mV feedback reference voltages. It delivers precise current regulation in IP network cameras and night vision systems.
For engineers reviewing the TPS54201DDCR datasheet, TPS54201DDCR pinout, TPS54201DDCR application, or TPS54201DDCR equivalent, key selection criteria include auto-retry fault protection, thermal shutdown at 150°C, 2-μA shutdown current, PWM dimming threshold at 0.9–1.1 V, and SOT-23-THIN (6-pin) package compatibility with space-constrained IR illumination designs.
Technical Context
The TPS54201DDCR employs peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across 1–100% PWM duty cycle. Its error amplifier uses transconductance of 240 μA/V and integrates frequency compensation to minimize external components.
It implements two distinct dimming modes: analog dimming (ADIM), where FB reference scales linearly from 201–210 mV as PWM duty cycles from 1% to 100%, and PWM dimming (PDIM), where FB reference is fixed at 96–104 mV and LED current switches fully on/off per PWM cycle - enabling >90% efficiency at full load while supporting deep dimming down to 1%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 28 V - supports 12-V and 24-V industrial camera rails without pre-regulation |
| Output Current | 1.5 A continuous - drives single or multi-string IR LEDs up to 1.5 A with integrated FETs |
| Switching Frequency | 600 kHz (typical) - balances inductor size and efficiency; ±120 kHz tolerance over temp |
| FB Reference Voltage | 205 mV (ADIM), 100 mV (PDIM) - enables precise current sensing with standard 0.1-Ω sense resistors |
| Shutdown Current | 2 µA (typical) - minimizes standby power in battery-backed or always-on security devices |
| Thermal Shutdown | 150°C (rising), 140°C (hysteresis) - protects against sustained overload in enclosed camera housings |
| PWM Dimming Threshold | 0.9–1.1 V - ensures reliable mode detection with standard microcontroller GPIO outputs |
| UVLO Threshold | 4.2 V (rising), 3.7 V (falling) - prevents erratic startup during brownout conditions in automotive or PoE-powered systems |
Pinout & Package
TPS54201DDCR is housed in 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 (RθJA = 89.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power ground reference | Primary return path for high-side switch, low-side freewheeling, and feedback circuitry; must be low-inductance connection to minimize noise |
| SW | Switching node | Drives external inductor; connects internally to both MOSFETs; requires tight layout to reduce EMI and voltage spikes |
| VIN | Main input supply | Accepts 4.5–28 V; powers internal bias circuits and high-side gate driver; bypass capacitor required near pin |
| BOOT | Bootstrap supply | Provides gate drive voltage for high-side MOSFET via external BOOT capacitor (CBOOT) between BOOT and SW |
| PWM | Dimming control input | Dual-function pin: sets ADIM reference level (1–100% duty) or triggers PDIM mode (logic-high >0.9 V); internally pulled low |
| FB | Current-sense feedback | Compares sensed LED current (via RSENSE) to internal reference; closed-loop regulation point for constant-current output |
Key Features
| Feature | Design Value |
|---|---|
| Auto-Retry Fault Protection | Recovers automatically after thermal, overvoltage, or open-circuit faults - eliminates manual reset in unattended surveillance systems |
| Deep Analog Dimming | Supports 1–100% linear LED brightness control via PWM duty cycle without flicker or color shift |
| Integrated Power Stage | 150-mΩ HS + 70-mΩ LS MOSFETs eliminate external switches and reduce BOM count by ≥4 components |
| LED-Open/Short Protection | Detects open-circuit (no current) or short-circuit (excessive current) LED strings and initiates auto-retry shutdown |
| Sense-Resistor Protection | Monitors RSENSE continuity and shorts - prevents false current regulation or runaway in failure modes |
| Internal Compensation | Eliminates external compensation network - simplifies design and improves stability across temperature and load |
Applications
| IP Network Camera Illumination | Analog Security Camera Night Vision |
|---|---|
Use Scenario: Provides invisible IR illumination for 24/7 video capture in low-light environments using 850-nm or 940-nm LED arrays. IC Role / Device Role / Timing Role: Constant-current buck regulator with PWM-dimming interface synchronizing to camera frame rate for flicker-free imaging. Use Value: Enables 1.5-A drive capability and 1% dimming resolution to match scene luminance while maintaining thermal safety in sealed enclosures. | Use Scenario: Powers high-intensity IR LED strings in legacy analog CCTV cameras with coaxial power/video transmission. IC Role / Device Role / Timing Role: Primary LED driver with analog dimming controlled by variable DC voltage or microcontroller PWM signal. Use Value: Delivers stable current despite wide input voltage swings (12–24 V) and supports deep dimming to extend LED lifetime and reduce heat buildup. |
| Video Doorbell Active Illumination | Embedded Camera System Flash Control |
Use Scenario: Supplies brief, high-current IR bursts during motion-triggered video capture in battery-powered smart doorbells. IC Role / Device Role / Timing Role: Fast-response current source activated by MCU GPIO; leverages 2-μA shutdown current for ultra-low standby drain. Use Value: Achieves <1-ms turn-on time and auto-retry recovery after thermal events - critical for intermittent, high-duty-cycle operation. | Use Scenario: Drives synchronized flash illumination for machine vision or biometric scanning in compact embedded modules. IC Role / Device Role / Timing Role: Precision current controller with programmable dimming profile via PWM input; supports burst-mode timing alignment. Use Value: Maintains ±1% current accuracy across temperature and enables 600-kHz switching for minimal flash duration jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54200DDCR | Shutdown-and-latch protection instead of auto-retry; identical electrical specs and pinout | Requires external reset after fault - unsuitable for unattended remote deployments | Select when system-level fault handling is implemented externally and latch behavior is preferred |
| LM3409HVMM/NOPB | Adjustable 200-kHz–2-MHz frequency; external MOSFETs; no integrated dimming logic | Needs external PWM-to-analog conversion and discrete protection circuitry | Select when higher voltage (>40 V) or higher current (>2 A) is required and design flexibility outweighs BOM simplicity |
Compared with TPS54201DDCR, TPS54200DDCR offers identical performance but latches on fault - requiring manual intervention - while LM3409HVMM/NOPB provides wider voltage/current scalability at the cost of increased component count and design complexity.
Availability
TPS54201DDCR is available at Aetrix Electronics and suitable for IP network cameras, analog security camera night vision, and video doorbell illumination requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS54201DDCR 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.
The TPS5420x product line targets compact, high-efficiency LED drivers for surveillance, smart home, and industrial vision systems - prioritizing integrated protection, deep dimming, and minimal external component count.
FAQ
What protection features does the TPS54201DDCR implement?
The TPS54201DDCR implements LED-open and LED-short protection, sense-resistor-open and sense-resistor-short protection, thermal shutdown at 150°C, overvoltage protection, and overcurrent protection. Unlike the TPS54200DDCR, it uses auto-retry mode - automatically restarting after fault clearance - making it ideal for unattended IR illumination systems where manual reset is impractical. All protections are hardware-based and require no firmware intervention.
How does analog dimming work on the TPS54201DDCR?
Analog dimming on the TPS54201DDCR adjusts the internal feedback reference voltage linearly from 201 mV to 210 mV as the PWM input duty cycle varies from 1% to 100%. This allows proportional LED current scaling without switching artifacts, enabling smooth, flicker-free brightness control. The TPS54201DDCR achieves this using an internal transconductance amplifier and slope-compensated current-mode control - no external DAC or op-amp is needed.
What is the difference between TPS54201DDCR and TPS54200DDCR?
The TPS54201DDCR and TPS54200DDCR share identical electrical specifications, pinout, and package (SOT-23-THIN), but differ exclusively in fault-handling behavior: TPS54201DDCR uses auto-retry mode (self-restarting after thermal, overvoltage, or open-circuit faults), while TPS54200DDCR uses shutdown-and-latch mode (requires external reset). Both support identical dimming modes, current limits, and thermal metrics.
Can the TPS54201DDCR drive multiple LED strings in parallel?
The TPS54201DDCR is designed for single-string or multi-string mono-color or IR LED configurations connected in series. Driving parallel LED strings is not recommended due to current mismatch risks - even with matched forward voltages, thermal drift and device variation can cause unequal current sharing. For parallel operation, separate TPS54201DDCR channels or a current-sharing topology with individual sense resistors is required.
What external components are mandatory for basic TPS54201DDCR operation?
Four external components are mandatory for basic TPS54201DDCR operation: input capacitor (CIN), output capacitor (CO), bootstrap capacitor (CBOOT), and current-sense resistor (RSENSE). An inductor is also required but not counted among "mandatory passive" since its value depends on design goals. No external compensation network is needed - all loop compensation is integrated, reducing design risk and board area.
TPS54201DDCR 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
TPS54201DDCR FAQ
1.How can I place an order for TPS54201DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54201DDCR 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 TPS54201DDCR reliable?
The price and inventory of TPS54201DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54201DDCR is usually 5 days.
3.What payment methods are accepted for TPS54201DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54201DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54201DDCR?
TPS54201DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54201DDCR 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 TPS54201DDCR?
For technical support, including TPS54201DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54201DDCR requirements.
6.How does Aetrix verify that TPS54201DDCR is sourced from the original manufacturer or authorized distributors?
All TPS54201DDCR 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 TPS54201DDCR meets industry standards.
7.What is the process for return or replacement of TPS54201DDCR?
All TPS54201DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS54201DDCR, 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 TPS54201DDCR part is unused and in its original packaging.
Return procedure for TPS54201DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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