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Texas Instruments TPS61165TDBVRQ1
- Part No.:
- TPS61165TDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
TPS61165TDBVRQ1.pdf
- Description:
- IC LED DRV RGLTR PWM SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:6,227
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Product details
Overview
TPS61165TDBVRQ1 from Texas Instruments is an automotive-grade, high-brightness white LED driver IC in SOT-23-6 package. It integrates a 40-V/1.2-A N-channel MOSFET, operates at 1.2-MHz fixed switching frequency, regulates FB to 200 mV ±2%, and delivers up to 350 mA LED current for series-connected LEDs in automotive cluster backlighting.
For engineers reviewing the TPS61165TDBVRQ1 datasheet, TPS61165TDBVRQ1 pinout, TPS61165TDBVRQ1 application, or TPS61165TDBVRQ1 equivalent, key selection criteria include open LED protection threshold (38 V), PWM/EasyScale™ dimming support, 3–18 V input range, thermal shutdown (160°C), and automotive AEC-Q100 qualification.
Technical Context
The TPS61165TDBVRQ1 implements current-mode control with slope compensation for stable operation above 40% duty cycle. Its error amplifier (transconductance 240–400 μmho, output resistance 6 MΩ) regulates the FB node to a precision 200-mV reference, enabling accurate LED current setting via external RSET.
It supports two mutually exclusive dimming modes selected at power-up: PWM dimming (5–100 kHz) modulates the internal reference voltage linearly with duty cycle, while EasyScale™ 1-wire digital dimming provides 32-step pseudo-logarithmic FB voltage programming (5–200 mV) using a single CTRL pin interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 18 V - supports wide automotive battery rail including cold-crank (3 V) and load-dump (18 V) conditions |
| Switch FET Rating | 40 V breakdown, 1.2 A current limit - enables driving up to 8× white LEDs (VF ≤ 4.75 V each) in series |
| Feedback Reference | 200 mV ±2% - minimizes I2R loss in RSET, enabling high-efficiency current sensing |
| Open LED Protection | 38 V threshold on SW pin - disables switch if LED string opens, preventing output overvoltage damage |
| Switching Frequency | 1.2 MHz fixed - allows use of small 10–22 μH inductors and compact ceramic capacitors |
| Dimming Interface | PWM or EasyScale™ 1-wire - eliminates audible noise by avoiding LED current bursting; no external RC filtering required on CTRL |
| Quiescent Current | 2.3 mA operating, 2 μA shutdown - extends battery life in always-on automotive displays |
Pinout & Package
SOT-23-6 package (1.60 mm × 2.90 mm body size), thermally enhanced for automotive ambient temperatures up to +105°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 3–18 V supply; includes 2.5 V undervoltage lockout with 70 mV hysteresis |
| SW | Switch node | Connects to inductor and Schottky diode anode; monitored for open-LED protection at 38 V threshold |
| FB | Current sense feedback | Regulated to 200 mV; connects to RSET to ground to set LED current (ILED = 200 mV / RSET) |
| GND | Ground reference | Power and signal return; must be low-impedance path for stable regulation and EMI control |
| CTRL | Multi-function control | Enables device, selects dimming mode (PWM or EasyScale™), and accepts PWM signals (5–100 kHz) |
| COMP | Error amplifier output | Connects external compensation capacitor to stabilize loop; transconductance 240–400 μmho |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40-V/1.2-A MOSFET | Eliminates external high-voltage switch; reduces BOM count and PCB area in space-constrained clusters |
| 38-V open LED protection | Prevents destructive overvoltage during LED disconnection without requiring external OVP circuitry |
| Soft-start with 32-step ramp | Reduces inrush current during startup; limits peak input current to <700 mA for first 5 ms |
| AEC-Q100 Grade 1 qualified | Rated for –40°C to +125°C junction temperature; validated for automotive infotainment and instrument cluster use |
| Up to 90% efficiency | Minimizes thermal stress in sealed enclosures; demonstrated at 350 mA with 3–6 LEDs across 3–12 V input |
Applications
| Automotive Instrument Cluster Backlighting | Automotive Media Display Backlighting |
|---|---|
Use Scenario: Driving 4–8 white LEDs in series behind TFT-LCD panels in digital dashboards with variable ambient lighting. IC Role / Device Role / Timing Role: High-efficiency boost controller providing constant-current drive with programmable brightness and open-circuit fault detection. Use Value: Enables uniform LED illumination without per-LED calibration; 38-V OVP prevents display damage during LED failure. | Use Scenario: Powering edge-lit LED arrays in center-stack infotainment displays requiring flicker-free dimming across 0–100% brightness range. IC Role / Device Role / Timing Role: PWM/EasyScale™-controlled LED driver delivering stable DC current with no audible capacitor noise. Use Value: Eliminates PWM-induced acoustic noise in cabin environment; 1.2-MHz switching avoids AM radio band interference. |
| Automotive HVAC Panel Lighting | Automotive Rearview Mirror Display |
Use Scenario: Illuminating segmented LED indicators and soft-touch buttons in climate control modules exposed to wide temperature swings. IC Role / Device Role / Timing Role: Automotive-qualified LED driver with thermal shutdown (160°C) and UVLO (2.5 V) for robust operation under extreme conditions. Use Value: Maintains consistent brightness from –40°C startup to +105°C ambient; shutdown current <2 μA preserves battery during vehicle sleep mode. | Use Scenario: Driving compact LED strings behind electrochromic mirrors with auto-dimming functionality and night-mode brightness reduction. IC Role / Device Role / Timing Role: Single-pin digital dimming interface (EasyScale™) allowing microcontroller to enter deep-sleep between brightness updates. Use Value: Reduces system power consumption by eliminating continuous PWM generation; 32-step resolution matches human eye perception curve. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61161AQDGQRQ1 | Lower 36-V switch rating; 1.1-A current limit; same SOT-23-6 package and pinout | Limited to ≤7 LEDs at 4.75 V each; reduced headroom for open-LED protection | Select when lower cost is prioritized and output voltage stays below 35 V |
| LM3409QMYX/NOPB | External MOSFET controller; adjustable 100–1000 kHz frequency; no integrated switch | Requires external high-side FET and gate driver; supports higher power and custom thermal layout | Select for >1 A LED current or designs needing flexible topology and thermal management |
Compared with TPS61165TDBVRQ1, TPS61161AQDGQRQ1 offers cost savings but sacrifices 4 V of OVP margin and 100 mA of current capability, while LM3409QMYX/NOPB trades integration for design flexibility and scalability beyond 1.2 A.
Availability
TPS61165TDBVRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, media display backlighting, and HVAC panel lighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS61165TDBVRQ1 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 automotive electronics with broad portfolio validation for safety-critical systems.
The TPS61165-Q1 product line delivers AEC-Q100 qualified LED drivers optimized for automotive interior lighting, featuring integrated protection, high efficiency, and dual-dimming interfaces for seamless integration into instrument clusters and displays.
FAQ
What is the maximum number of white LEDs the TPS61165TDBVRQ1 can drive in series?
The TPS61165TDBVRQ1 supports up to 8 white LEDs in series, calculated using its 38-V open LED protection threshold minus the 200-mV FB reference: (38 V − 0.2 V) ÷ 4.75 V ≈ 8. For reliable operation, TI recommends limiting to 6–7 LEDs to maintain margin against forward voltage variation and temperature drift. The TPS61165TDBVRQ1 datasheet confirms this in the Recommended Operating Conditions table under VO (output voltage range).
Does the TPS61165TDBVRQ1 require external compensation components?
Yes, the TPS61165TDBVRQ1 requires an external capacitor connected between COMP and GND for loop stability. The error amplifier's transconductance (240–400 μmho) and output resistance (6 MΩ) necessitate proper type-II compensation. TI's typical application schematic specifies a 1-nF capacitor, and the datasheet's Layout Guidelines section emphasizes low-inductance placement near the COMP pin to prevent oscillation.
How does the TPS61165TDBVRQ1 prevent audible noise during dimming?
The TPS61165TDBVRQ1 avoids audible noise by modulating the internal 200-mV reference voltage-not the LED current-during PWM dimming. The filtered reference sets a new DC current level, eliminating current bursting that causes capacitor vibration. This analog dimming method is confirmed in Section 7.5.3 of the TPS61165TDBVRQ1 datasheet, which states "only the WLED DC current is modulated" and "eliminates the audible noise which often occurs."
Can the TPS61165TDBVRQ1 operate with input voltage below 3 V?
No, the TPS61165TDBVRQ1 cannot operate reliably below 3 V. Its absolute maximum rating specifies a minimum VIN of –0.3 V, but the recommended operating condition is 3 V minimum, and undervoltage lockout activates at 2.2–2.5 V (typical). Below 3 V, the internal 1.2-A switch FET cannot sustain required gate drive, and efficiency drops sharply. The TPS61165TDBVRQ1 datasheet Table 6-3 explicitly lists 3 V as the minimum VI.
Is the TPS61165TDBVRQ1 pin-compatible with non-automotive versions like TPS61165DRVR?
Yes, the TPS61165TDBVRQ1 is pin-compatible with the commercial-grade TPS61165DRVR, sharing identical SOT-23-6 pinout (VIN, SW, FB, GND, CTRL, COMP), electrical characteristics, and functional behavior. However, the TPS61165TDBVRQ1 undergoes additional AEC-Q100 stress testing and is qualified for automotive temperature range (–40°C to +125°C junction), whereas the DRVR version is rated only to +85°C.
TPS61165TDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- 3V ~ 38V
- Current - Output / Channel:
- 1.2A (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS61165TDBVRQ1 FAQ
1.How can I place an order for TPS61165TDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61165TDBVRQ1 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 TPS61165TDBVRQ1 reliable?
The price and inventory of TPS61165TDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61165TDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS61165TDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61165TDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61165TDBVRQ1?
TPS61165TDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61165TDBVRQ1 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 TPS61165TDBVRQ1?
For technical support, including TPS61165TDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61165TDBVRQ1 requirements.
6.How does Aetrix verify that TPS61165TDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS61165TDBVRQ1 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 TPS61165TDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS61165TDBVRQ1?
All TPS61165TDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61165TDBVRQ1, 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 TPS61165TDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS61165TDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61165TDBVRQ1 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UFD-7
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