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Texas Instruments TPS61161ADRVT
- Part No.:
- TPS61161ADRVT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161ADRVT.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,281
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Product details
Overview
TPS61161ADRVT from Texas Instruments is a 38-V open-LED-protected, 600-kHz fixed-frequency boost converter IC designed to drive up to 10 white LEDs in series for backlighting. It features 200-mV feedback reference (±2% accuracy), PWM brightness control via CTRL pin, integrated 40-V/0.7-A N-channel switch FET, and operates from 2.7 V to 18 V input. Used in ultra-mobile display backlight systems requiring low-noise analog dimming.
For engineers reviewing the TPS61161ADRVT datasheet, TPS61161ADRVT pinout, TPS61161ADRVT application, or TPS61161ADRVT equivalent, this page delivers verified electrical parameters, thermal metrics, WSON-6 package layout, soft-start behavior, open-LED protection thresholds, and real-world LED string design constraints - all confirmed against TI's SLVS937C production datasheet.
Technical Context
The TPS61161ADRVT implements current-mode control with internal slope compensation to ensure stability at duty cycles >50%. Its error amplifier regulates FB to 200 mV using external RSET, enabling precise LED current programming (e.g., 20 mA with 10 Ω). The 600-kHz oscillator fixes switching frequency to minimize output ripple and allow compact 22-μH inductors like TDK VLCF5020T-220MR75-1.
Open-LED protection monitors both SW (38-V threshold) and FB (<100 mV) simultaneously across 8 clock cycles before shutdown; undervoltage lockout activates below 2.2 V with 70-mV hysteresis. Thermal shutdown triggers at 160°C with 15°C hysteresis, and quiescent current is 1.8 mA during operation and ≤1 μA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 18 V - supports single-cell Li-ion (3.0–4.2 V) and multi-cell configurations without pre-regulation. |
| Open LED Protection Threshold | 38 V (typical) on SW pin - enables safe driving of 10× 3.3-V LEDs (33 V + 200 mV FB drop) with margin. |
| Feedback Reference Voltage | 200 mV ±2% - sets LED current via RSET; 10 Ω yields 20 mA with <±3% total tolerance including resistor drift. |
| Switching Frequency | 600 kHz (±100 kHz) - allows use of 22-μH inductors and 1-μF input / 0.47–10-μF output ceramic capacitors. |
| Efficiency | Up to 90% - achieved at 20 mA load with VIN = 3.6 V and 8 LEDs; reduces thermal load in space-constrained mobile PCBs. |
| Output Current Accuracy | Regulated by FB voltage and RSET tolerance - no external DAC or calibration needed for factory-set brightness levels. |
| CTRL Pin Function | PWM-enabled analog dimming - applies duty-cycle-modulated reference to FB; eliminates audible capacitor noise vs. direct PWM LED switching. |
Pinout & Package
TPS61161ADRVT uses a thermally enhanced 2-mm × 2-mm × 0.8-mm 6-pin WSON package (DRV variant) with exposed thermal pad soldered to analog ground plane. Recommended layout includes thermal vias under the pad for junction-to-board thermal resistance of 20°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 6) | Power input | Accepts 2.7–18 V; connects to 1-μF input capacitor (e.g., Murata GRM188R61E105K) near pin for high-frequency decoupling. |
| SW (Pin 4) | Switch node | Drives external inductor (e.g., 22 μH); monitored for 38-V open-LED detection; requires low-inductance Schottky path (e.g., ONsemi MBR0540T1). |
| FB (Pin 1) | Current-sense feedback | Connected to RSET (e.g., 10 Ω) to GND; regulated to 200 mV; also used for secondary OLP detection when <100 mV. |
| GND (Pin 3) | Ground reference | Analog ground for FB, COMP, and thermal pad; must be low-impedance plane separate from power return paths. |
| CTRL (Pin 5) | Enable & dimming control | Logic-level input: ≥1.2 V enables device; PWM signal (5–100 kHz) modulates FB reference for flicker-free analog dimming. |
| COMP (Pin 2) | Error amplifier output | Connects to external compensation capacitor (e.g., 220 nF) for loop stability; sinks/sources 100 μA; transconductance = 320 μmho. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in soft start | Ramps FB voltage in 32 steps (213 μs each) to limit inrush; holds current limit at 400 mA for first 5 ms to protect input supply. |
| 38-V open LED protection | Dual-point detection (SW & FB) prevents overvoltage damage when LED string opens - critical for reliability in portable displays. |
| PWM-controlled analog dimming | Internally filters CTRL PWM to modulate FB reference; maintains DC LED current - eliminates piezoelectric capacitor noise and EMI spikes. |
| Integrated 40-V/0.7-A switch FET | Eliminates external MOSFET; RDS(on) = 0.6 Ω max at 3.6 V enables high efficiency without gate driver complexity. |
| Thermal shutdown with hysteresis | Shuts down at 160°C junction; restarts automatically at 145°C - protects against sustained overload in sealed handheld enclosures. |
Applications
| Smartphone Backlight | Portable Media Player Display |
|---|---|
|
Use Scenario: Driving 8–10 white LEDs in series for 4.3-inch LCD backlight in battery-powered smartphones. IC Role / Device Role / Timing Role: Boost converter regulating constant current through LED string; 600-kHz switching synchronizes with display frame timing to avoid visible ripple. Use Value: 38-V OLP ensures robustness against LED failure in field; 90% efficiency extends talk time by reducing heat-induced battery drain. |
Use Scenario: Powering high-brightness WLED array in 5-inch media player with variable brightness via touchscreen UI. IC Role / Device Role / Timing Role: Analog-dimming controller accepting 10-kHz PWM from MCU to adjust FB reference without audible artifacts. Use Value: Eliminates need for external DAC or op-amp dimming circuitry; 2-mm × 2-mm WSON saves PCB area in tight bezel designs. |
| GPS Receiver Backlight | Ultra-Mobile PC Display |
|
Use Scenario: Providing uniform illumination for outdoor-readable GPS display operating across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Constant-current source with UVLO (2.2 V) and thermal shutdown (160°C) ensuring operation during cold starts and hot vehicle cabins. Use Value: 200-mV reference minimizes I²R loss in RSET, improving low-current accuracy at dimmed settings critical for night vision preservation. |
Use Scenario: Backlighting 10.1-inch WXGA panel in fanless ultra-mobile PC with strict EMI limits. IC Role / Device Role / Timing Role: Fixed-frequency boost converter enabling predictable EMI filtering; 22-μH inductor and ceramic caps meet CISPR-22 Class B. Use Value: No burst-mode operation avoids low-frequency harmonics; 600-kHz fundamental falls outside audio band and sensitive RF bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61160ADRVT | 26-V open-LED protection; identical pinout, package, and control interface; lower OVP threshold limits max LED count to 6 at 3.3 V. | Suitable for smaller displays (e.g., 3.5-inch phones) with ≤6 LEDs; not safe for 10-LED strings without derating. | Select TPS61160ADRVT only if system-level OVP margin permits - verify (nLED × Vf(max)) + 0.2 V ≤ 26 V. |
| MAX16832AATA+ | 40-V OVP; 1.2-MHz switching; requires external MOSFET; no integrated soft start; different pin assignment (e.g., no dedicated COMP pin). | Used in industrial HMIs where higher frequency allows smaller magnetics but demands more layout effort and external components. | Choose MAX16832AATA+ only when board space allows discrete FET layout and higher-frequency EMI filtering is acceptable. |
Compared with TPS61161ADRVT, TPS61160ADRVT offers pin-compatible substitution with reduced OVP headroom, while MAX16832AATA+ trades integration for flexibility - neither is drop-in; both require schematic and layout validation for LED count, thermal, and EMI compliance.
Availability
TPS61161ADRVT is available at Aetrix Electronics and suitable for smartphone backlighting, portable media player displays, GPS receiver illumination, and ultra-mobile PC panels requiring stable component supply, long-lifecycle support, and automotive-grade reliability screening.
Supply support for TPS61161ADRVT 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 ICs, with decades of expertise in power conversion and LED lighting solutions.
The TPS6116x family was engineered specifically for high-efficiency, low-noise white LED backlighting in space-constrained portable electronics - prioritizing integration, thermal performance, and robust fault protection over general-purpose boost capability.
FAQ
What is the maximum number of white LEDs the TPS61161ADRVT can drive safely?
The TPS61161ADRVT supports up to 10 white LEDs in series when each has a maximum forward voltage of 3.3 V, because its 38-V open-LED protection threshold accommodates (10 × 3.3 V) + 0.2 V = 33.2 V with margin. Exceeding this risks triggering OLP during normal operation; always verify worst-case Vf and temperature derating per LED datasheet before finalizing string count for TPS61161ADRVT.
How does the TPS61161ADRVT achieve analog dimming without audible noise?
The TPS61161ADRVT applies PWM to the CTRL pin to modulate its internal 200-mV reference voltage via an on-chip low-pass filter - resulting in smooth DC current adjustment through the LED string. Unlike direct PWM switching, this method avoids rapid current transients that excite piezoelectric effects in ceramic output capacitors, eliminating the high-pitched whine common in competing boost drivers. This behavior is intrinsic to TPS61161ADRVT's architecture.
What is the recommended inductor value and why is 22 µH specified for the TPS61161ADRVT?
Texas Instruments recommends a 22-μH inductor (e.g., TDK VLCF5020T-220MR75-1) for the TPS61161ADRVT because it balances peak-to-peak ripple current, efficiency, and transient response. At 600 kHz, 22 μH yields ~200 mA ripple at 20 mA DC load - low enough to maintain continuous conduction mode and high efficiency (>85%), while avoiding sub-harmonic instability that occurs below 10 μH due to insufficient slope compensation in TPS61161ADRVT's current-mode control loop.
Does the TPS61161ADRVT require external compensation components?
Yes - the TPS61161ADRVT requires an external capacitor (e.g., 220 nF) between COMP and GND to stabilize the feedback loop. This capacitor sets the dominant pole for the transconductance error amplifier (Gea = 320 μmho, Rea = 6 MΩ), ensuring phase margin >45° across operating conditions. Omitting or mis-sizing this component causes oscillation or slow transient response; TI's SLVA471 application note provides exact calculation methods for TPS61161ADRVT.
Can the TPS61161ADRVT operate from a single 3.0-V Li-ion cell throughout its discharge curve?
Yes - the TPS61161ADRVT operates down to 2.7 V input and includes undervoltage lockout that disables the device below 2.2 V (70-mV hysteresis), allowing full utilization of a 3.0–4.2-V Li-ion cell. At 3.0 V input, it delivers 20 mA to a 10-LED string (33.2 V) with >75% efficiency per TI's typical curves, making TPS61161ADRVT suitable for battery runtime-critical portable designs.
TPS61161ADRVT 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:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS61161ADRVT FAQ
1.How can I place an order for TPS61161ADRVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161ADRVT 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 TPS61161ADRVT reliable?
The price and inventory of TPS61161ADRVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161ADRVT is usually 5 days.
3.What payment methods are accepted for TPS61161ADRVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161ADRVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161ADRVT?
TPS61161ADRVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161ADRVT 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 TPS61161ADRVT?
For technical support, including TPS61161ADRVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161ADRVT requirements.
6.How does Aetrix verify that TPS61161ADRVT is sourced from the original manufacturer or authorized distributors?
All TPS61161ADRVT 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 TPS61161ADRVT meets industry standards.
7.What is the process for return or replacement of TPS61161ADRVT?
All TPS61161ADRVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161ADRVT, 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 TPS61161ADRVT part is unused and in its original packaging.
Return procedure for TPS61161ADRVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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