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Texas Instruments TPS61161QDRVRQ1
- Part No.:
- TPS61161QDRVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161QDRVRQ1.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,773
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Product details
Overview
TPS61161QDRVRQ1 from Texas Instruments is an automotive-grade white LED driver IC implementing a 600-kHz fixed-frequency boost converter with integrated 40-V/0.7-A N-channel MOSFET. It regulates LED current up to 20 mA via 200-mV feedback reference (±2% accuracy), supports up to 10-series LEDs with 38-V open-LED protection, and operates from 2.7 V to 18 V input for automotive cluster backlighting.
For engineers reviewing the TPS61161QDRVRQ1 datasheet, TPS61161QDRVRQ1 pinout, TPS61161QDRVRQ1 application, or TPS61161QDRVRQ1 equivalent, key selection criteria include its dual dimming interface (EasyScale™ 1-wire and PWM), thermal shutdown at 160°C, undervoltage lockout at 2.5 V, soft-start ramp time of 213 µs/step, and QFN-6 (2 mm × 2 mm) package with exposed thermal pad.
Technical Context
The TPS61161QDRVRQ1 uses current-mode control with slope compensation for stable operation above 50% duty cycle. Its error amplifier features 320-µmho transconductance and 6-MΩ output resistance, with COMP pin compensation enabling loop stability across load and input variations.
Open LED protection monitors both SW and FB pins over 8 clock cycles; shutdown triggers when SW exceeds 38 V and FB falls below 100 mV. Dimming mode is selected at power-up: PWM dimming modulates the 200-mV reference via internal low-pass filtering, while EasyScale™ enables 32-step logarithmic digital control using a single-wire protocol with auto bit-rate detection (1.7–160 kbit/s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 18 V - supports wide automotive battery range including cold-crank conditions. |
| Output Voltage Limit | 38 V - enables driving up to 10 white LEDs in series (e.g., 3.2 V × 10 = 32 V nominal). |
| Feedback Reference | 200 mV ±2% - sets LED current via external Rset; reduces sense resistor power loss. |
| Switch FET Rating | 40 V / 0.7 A - handles high-side boost switching with integrated current limiting (0.56–0.84 A). |
| Switching Frequency | 600 kHz fixed - enables compact magnetics (e.g., 22 µH inductor) and low output ripple. |
| Dimming Interfaces | PWM (5–100 kHz) and EasyScale™ 1-wire - provides analog-equivalent dimming without audible noise. |
| Thermal Protection | 160°C shutdown with 15°C hysteresis - prevents junction damage during sustained overload or poor PCB thermal design. |
Pinout & Package
The TPS61161QDRVRQ1 is housed in a 2.00 mm × 2.00 mm × 0.8-mm 6-pin SON (QFN-6) package with exposed thermal pad soldered to analog ground plane for optimal power dissipation (RθJA = 96.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Current-sense feedback input | Connects to Rset–GND node; regulated to 200 mV to set LED current ILED = 200 mV / Rset. |
| GND | Power and signal ground | Reference for all internal circuits; must be connected to low-impedance analog ground plane. |
| CTRL | Multi-function control input | Enables device, selects dimming mode (PWM or EasyScale™), and accepts digital commands or PWM signals. |
| COMP | Error amplifier output | Connects external compensation capacitor (e.g., 220 nF) to stabilize feedback loop dynamics. |
| SW | Switch node | Connects to inductor and Schottky diode anode; carries high-frequency switching current and voltage up to 40 V. |
| VIN | Input supply | Accepts 2.7–18 V DC; powers internal circuitry and supplies energy to boost stage via inductor. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in soft start | Ramps FB voltage in 32 steps (213 µs/step) to limit inrush current and prevent input voltage sag during startup. |
| 38-V open LED protection | Disables switch FET and forces shutdown if SW > 38 V and FB < 100 mV for 8 cycles - protects internal 40-V FET and external components. |
| Flexible dimming architecture | Supports both PWM (no audible noise due to analog-equivalent current modulation) and EasyScale™ (32-step logarithmic control with auto bit-rate detection). |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient) with ±1000-V HBM/CDM ESD rating - suitable for under-hood and instrument cluster applications. |
| High efficiency | Up to 90% at 20 mA output - achieved via low RDS(on) (0.6 Ω typical) switch FET and optimized 600-kHz control loop. |
Applications
| Automotive Instrument Cluster Backlighting | High-Brightness Media Display Backlighting |
|---|---|
Use Scenario: Illuminating TFT-LCD segments in vehicle dashboards with uniform brightness across temperature and battery voltage variation. IC Role / Device Role / Timing Role: Boost converter LED driver regulating constant current to 6–10 series-connected white LEDs; provides 38-V OVP and thermal shutdown for safety-critical operation. Use Value: Eliminates need for per-LED calibration by forcing identical current through all LEDs in series, ensuring consistent luminance and color point. | Use Scenario: Powering edge-lit LED arrays in infotainment center displays requiring flicker-free dimming down to 0.1% brightness. IC Role / Device Role / Timing Role: Current-regulated boost controller with dual dimming interface - PWM for fast response, EasyScale™ for low-power microcontroller sleep-mode operation. Use Value: Enables true analog-equivalent dimming without PWM-induced audio noise on ceramic capacitors, critical for quiet cabin environments. |
| Automotive HVAC Panel Lighting | Commercial Vehicle Head-Up Display (HUD) Illumination |
Use Scenario: Driving segmented LED indicators on climate control interfaces where EMI and thermal constraints limit component count. IC Role / Device Role / Timing Role: Integrated power stage (40-V FET + current sensing + error amp) with minimal external parts (1 inductor, 2 caps, 1 diode, 1 resistor). Use Value: Reduces BOM cost and PCB area versus discrete boost solutions while maintaining AEC-Q100 compliance and 125°C ambient operation. | Use Scenario: Supplying precise current to high-luminance LEDs in HUD projection systems requiring stable light output under vibration and thermal cycling. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open-LED detection, UVLO (2.5 V), and thermal shutdown - ensures fail-safe behavior during LED string failure. Use Value: Prevents uncontrolled output voltage rise during open-circuit conditions, protecting downstream optics and meeting ASIL-B functional safety expectations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61160QDRVRQ1 | Same pinout and feature set but rated for 30-V output (vs. 38 V); lacks open-LED protection threshold scaling for 10-LED strings. | Suitable for ≤8-series LED configurations only; not recommended for 10-LED automotive clusters requiring full 38-V margin. | Select TPS61161QDRVRQ1 when driving ≥9 white LEDs or requiring guaranteed 38-V OVP headroom. |
| LM3409QMYX/NOPB | External MOSFET controller (no integrated switch); requires separate 40-V FET, gate driver, and current sense amp - higher BOM count and layout complexity. | Offers greater flexibility in power level and thermal management but increases design effort and validation scope for automotive use. | Choose LM3409QMYX/NOPB only when system-level power exceeds 2.5 W or thermal constraints require remote FET placement. |
Compared with TPS61161QDRVRQ1, the TPS61160QDRVRQ1 offers identical functionality at lower voltage rating (30 V), while the LM3409QMYX/NOPB trades integration for scalability - making TPS61161QDRVRQ1 optimal for space-constrained, high-reliability 10-LED automotive backlighting.
Availability
TPS61161QDRVRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, high-brightness media displays, and commercial vehicle HUD illumination requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS61161QDRVRQ1 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 company specializing in analog, embedded processing, and power management technologies with broad automotive qualification expertise.
The TPS61161-Q1 belongs to TI's automotive LED driver product line, designed specifically for AEC-Q100-compliant backlighting in instrument clusters and infotainment displays where reliability, efficiency, and dual-dimming flexibility are critical.
FAQ
What is the maximum number of white LEDs the TPS61161QDRVRQ1 can drive in series?
The TPS61161QDRVRQ1 supports up to 10 white LEDs in series, enabled by its 38-V open-LED protection threshold and integrated 40-V switch FET. This accommodates typical forward voltages of 3.2 V per LED (32 V total) with 6-V margin for variation and aging. Driving more than 10 LEDs risks exceeding the 38-V OVP limit and triggering shutdown, so TPS61161QDRVRQ1 is strictly limited to 10-series configurations.
How does the TPS61161QDRVRQ1 achieve flicker-free dimming without audible noise?
The TPS61161QDRVRQ1 achieves flicker-free dimming without audible noise by modulating the 200-mV feedback reference voltage - not the LED current itself - during PWM dimming. The internal low-pass filter converts the CTRL pin PWM signal into a stable analog reference, resulting in smooth DC current regulation. This avoids pulsing the inductor current at audio frequencies, eliminating mechanical vibration in ceramic capacitors and inductors that cause audible coil whine.
What is the function of the COMP pin on the TPS61161QDRVRQ1, and what capacitor value is recommended?
On the TPS61161QDRVRQ1, the COMP pin is the output of the transconductance error amplifier and requires an external compensation capacitor to stabilize the feedback loop. A 220-nF capacitor (e.g., Murata GRM21BR71H105K) is recommended per the typical application circuit. This value sets the dominant pole and ensures phase margin >45° across operating conditions, preventing oscillation during load transients or input voltage changes.
Does the TPS61161QDRVRQ1 support both PWM and digital dimming simultaneously?
No, the TPS61161QDRVRQ1 does not support simultaneous PWM and digital dimming. Dimming mode is selected at power-up: a specific EasyScale™ pulse sequence on the CTRL pin enables 1-wire digital control, while absence of that sequence defaults to PWM mode. Once selected, the mode remains active until the device is fully shut down (CTRL held low >2.5 ms) and re-enabled. This ensures deterministic behavior and avoids command conflicts.
What thermal considerations apply to the TPS61161QDRVRQ1 in automotive applications?
The TPS61161QDRVRQ1 features thermal shutdown at 160°C junction temperature with 15°C hysteresis. In automotive applications, the exposed thermal pad must be soldered to a solid analog ground plane with ≥4 thermal vias (0.3-mm diameter) to achieve RθJB = 65.9°C/W. Without proper thermal relief, ambient temperatures above 105°C may trigger shutdown during continuous 20-mA operation - especially with poor airflow or high VIN conditions.
TPS61161QDRVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- 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):
- 2.7V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- 38V
- Current - Output / Channel:
- 700mA (Switch)
- Frequency:
- 600kHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS61161QDRVRQ1 FAQ
1.How can I place an order for TPS61161QDRVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161QDRVRQ1 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 TPS61161QDRVRQ1 reliable?
The price and inventory of TPS61161QDRVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161QDRVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS61161QDRVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161QDRVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161QDRVRQ1?
TPS61161QDRVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161QDRVRQ1 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 TPS61161QDRVRQ1?
For technical support, including TPS61161QDRVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161QDRVRQ1 requirements.
6.How does Aetrix verify that TPS61161QDRVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS61161QDRVRQ1 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 TPS61161QDRVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS61161QDRVRQ1?
All TPS61161QDRVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161QDRVRQ1, 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 TPS61161QDRVRQ1 part is unused and in its original packaging.
Return procedure for TPS61161QDRVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS61161QDRVRQ1 Tags
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