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Texas Instruments TPS61161DRVR
- Part No.:
- TPS61161DRVR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161DRVR.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:31,884
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Product details
Overview
TPS61161DRVR from Texas Instruments is a high-efficiency white LED boost driver IC with integrated 40-V/0.7-A N-channel MOSFET, 600-kHz fixed-frequency PWM control, 38-V open-LED protection, and dual-mode brightness control (PWM or EasyScale™ one-wire digital interface). It regulates LED current via 200-mV feedback reference and supports up to 10-series LEDs in portable backlighting applications.
For engineers reviewing the TPS61161DRVR datasheet, TPS61161DRVR pinout, TPS61161DRVR application, or TPS61161DRVR equivalent, key selection considerations include input voltage range (2.7–18 V), open-LED protection threshold (38 V typical), FB reference accuracy (±2%), thermal shutdown (160°C), and compatibility with 2-mm × 2-mm WSON-6 package layout constraints.
Technical Context
The TPS61161DRVR implements current-mode control with slope compensation for stable operation above 50% duty cycle. Its error amplifier (transconductance: 240–400 μmho; output resistance: 6 MΩ) drives the COMP pin to regulate FB at 200 mV, enabling precise LED current setting via external RSET. The 600-kHz oscillator ensures low output ripple and small external component size.
Open-LED protection monitors both SW and FB pins across 8 switching cycles: shutdown occurs if SW exceeds 38 V and FB falls below 100 mV (50% of 200 mV). Soft-start ramps FB in 32 steps (213 μs/step), while startup current limit is halved for first 5 ms to limit inrush.
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 alkaline/NiMH inputs without pre-regulation. |
| Open LED Protection | 38 V (typical) - enables safe driving of up to 10 white LEDs (3.2 V each + 200 mV FB drop) without external OVP circuitry. |
| Feedback Reference | 200 mV ±2% - minimizes power loss in RSET; 20 mA LED current requires 10 Ω resistor (200 mV / 20 mA). |
| Switching Frequency | 600 kHz (±100 kHz) - allows use of compact 22-μH inductors (e.g., TDK VLCF5020T-220MR75-1) and sub-1-μF output capacitors. |
| Efficiency | Up to 90% - achieved at 20 mA load with 3.6 V input and 8-LED string, reducing thermal load in space-constrained handhelds. |
| Quiescent Current | 1.8 mA - maintains low system standby power when active; drops to 1 μA in shutdown mode (CTRL low ≥2.5 ms). |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects silicon during sustained overloads or poor PCB thermal design; auto-recovery avoids manual reset. |
Pinout & Package
TPS61161DRVR uses a thermally enhanced 2-mm × 2-mm WSON-6 package with exposed thermal pad soldered to analog ground plane. Pin numbering follows top-view orientation with pin 1 (FB) at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Current-sense feedback input | Regulated to 200 mV; connects to RSET to ground; determines LED current magnitude (ILED = 200 mV / RSET). |
| SW (Pin 4) | Switch node | Connects to inductor (L1) and Schottky diode anode; monitored for 38-V open-LED protection; rated for 40-V max. |
| VIN (Pin 6) | Power input | Accepts 2.7–18 V; supplies internal circuitry and switch FET; requires ≥1 μF ceramic input capacitor (e.g., Murata GRM188R61E105K). |
| GND (Pin 3) | Ground reference | Analog/digital ground return; thermal pad must be soldered to PCB ground plane for thermal management (RθJB = 65.9°C/W). |
| CTRL (Pin 5) | Multi-function control | Enables device (high), shuts down (low ≥2.5 ms), accepts PWM dimming signal, or hosts EasyScale™ digital commands. |
| COMP (Pin 2) | Error amplifier output | Drives external compensation network (e.g., Murata GRM21BR71H105K + 10 Ω); stabilizes feedback loop with 500-kHz crossover. |
Key Features
| Feature | Design Value |
|---|---|
| Dual dimming interface | PWM (5–100 kHz) and EasyScale™ one-wire digital control - eliminates need for dedicated PWM generator or I²C bus, saving MCU GPIO and power. |
| No-audible-noise dimming | Internal FB reference modulation (not LED current pulsing) - prevents capacitor squeal during brightness adjustment in quiet environments. |
| Integrated soft-start | 32-step FB ramp (213 μs/step) + 5-ms half-current limit - limits inrush to ≤400 mA during power-up, avoiding input rail collapse. |
| Robust fault protection | 38-V open-LED detection + 160°C thermal shutdown + 2.2-V UVLO - enables reliable operation in battery-powered devices with variable input and thermal conditions. |
| Space-optimized footprint | 2-mm × 2-mm WSON-6 with thermal pad - fits within 4 mm² board area, ideal for ultra-thin mobile displays and wearable electronics. |
Applications
| Smartphone Backlighting | Portable Media Player Display |
|---|---|
|
Use Scenario: Driving 6–8 white LEDs in series for 3.5–5-inch LCD backlight in battery-operated smartphones. IC Role / Device Role / Timing Role: Boost converter with integrated switch, regulating constant LED current via FB pin; 600-kHz switching synchronizes with display frame timing to avoid interference. Use Value: 38-V OVP supports full LED string margin (e.g., 8 × 3.2 V = 25.6 V + 200 mV = 25.8 V), eliminating risk of overvoltage damage during LED aging or temperature drift. |
Use Scenario: Powering 4–6 white LEDs for 2.8–4.3-inch TFT display in MP3/video players with Li-ion battery input. IC Role / Device Role / Timing Role: Constant-current LED driver using PWM dimming mode; CTRL pin accepts host MCU's 10-kHz PWM signal for smooth brightness control. Use Value: 90% peak efficiency at 20 mA reduces heat generation in sealed plastic enclosures, extending battery runtime and preventing thermal throttling. |
| GPS Receiver UI Display | Ultra-Mobile PC Touchscreen |
|
Use Scenario: Illuminating segmented or monochrome LCD with 2–4 white LEDs in automotive-grade GPS units operating from 9–16 V vehicle supply. IC Role / Device Role / Timing Role: Input-voltage-tolerant boost driver (2.7–18 V) with undervoltage lockout (2.2 V) ensuring clean shutdown during cold-cranking events. Use Value: 1 μA shutdown current preserves battery charge during long idle periods; 38-V OVP accommodates transient spikes on automotive rails without false triggering. |
Use Scenario: Backlighting high-resolution resistive/capacitive touchscreen in sub-10-inch UMPCs with tight board space and thermal constraints. IC Role / Device Role / Timing Role: Compact LED driver using EasyScale™ digital interface to minimize MCU pin count and enable deep-sleep modes between brightness updates. Use Value: 2-mm × 2-mm WSON-6 footprint saves >60% board area vs. QFN alternatives; thermal pad connection lowers junction temperature by ~25°C under full load. |
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 |
|---|---|---|---|
| TPS61160DRVR | 26-V open-LED protection; identical pinout, package, and feature set except lower OVP threshold. | Suitable for ≤6-LED strings (e.g., 6 × 3.2 V + 200 mV = 20.6 V < 26 V); not safe for 8–10 LED configurations. | Select TPS61160DRVR only when total LED forward voltage plus 200 mV remains below 26 V minimum OVP. |
| MAX16832ATA+T | 36-V OVP; 1.2-MHz switching; requires external MOSFET; no integrated EasyScale™ interface. | Better suited for higher-frequency designs needing smaller inductors; lacks digital dimming, relying solely on PWM or analog control. | Choose MAX16832ATA+T when board space permits discrete FET layout and digital interface is unnecessary; verify 36-V OVP meets string voltage margin. |
Compared with TPS61160DRVR, the TPS61161DRVR enables longer LED strings without redesign, while MAX16832ATA+T trades integration for higher switching frequency-requiring careful layout for EMI but offering flexibility in thermal and component sizing.
Availability
TPS61161DRVR is available at Aetrix Electronics and suitable for smartphone backlighting, portable media player displays, GPS receiver UIs, ultra-mobile PC touchscreens, and other compact LED lighting applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS61161DRVR 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-efficiency DC/DC conversion and LED driver innovation.
The TPS6116x product line was designed specifically for space-constrained, battery-powered white LED backlighting-emphasizing integration (switch + controller), low-noise dimming, and robust protection for consumer handhelds and portable displays.
FAQ
What is the maximum number of white LEDs the TPS61161DRVR can drive in series?
The TPS61161DRVR supports up to 10 white LEDs in series, based on its 38-V open-LED protection threshold and 200-mV feedback reference. Assuming a worst-case forward voltage of 3.2 V per LED, the total string voltage is 32 V + 0.2 V = 32.2 V, staying safely below the 38-V OVP minimum. Always verify actual LED VF at operating temperature and current when finalizing the design.
How does the TPS61161DRVR implement noise-free LED dimming?
The TPS61161DRVR avoids audible capacitor noise by modulating the internal 200-mV feedback reference voltage-not the LED current itself-using either PWM or EasyScale™ commands. This results in true analog dimming where the output current remains continuous and ripple-free, eliminating mechanical vibration in ceramic output capacitors that occurs with direct PWM current pulsing.
Can the TPS61161DRVR operate from a 3.3-V supply?
Yes, the TPS61161DRVR operates from 2.7 V to 18 V, making it fully compatible with 3.3-V systems. At 3.3 V input, it efficiently boosts to drive LED strings requiring 10–30 V, provided the output current and duty cycle remain within specifications. Efficiency remains above 85% for typical 20-mA loads with 8-LED strings.
What external components are required for basic TPS61161DRVR operation?
A functional TPS61161DRVR circuit requires: (1) an input capacitor (≥1 μF, e.g., Murata GRM188R61E105K), (2) an inductor (10–22 μH, e.g., TDK VLCF5020T-220MR75-1), (3) a Schottky diode (e.g., ONsemi MBR0540T1), (4) an output capacitor (0.47–10 μF, e.g., Murata GRM21BR71H105K), and (5) RSET (e.g., 10 Ω for 20 mA). COMP compensation uses a series RC network.
Is the TPS61161DRVR pin-compatible with the TPS61160DRVR?
Yes, the TPS61161DRVR is pin-compatible and package-compatible with the TPS61160DRVR-both use the same 2-mm × 2-mm WSON-6 package and identical pinout. The sole functional difference is the open-LED protection threshold (38 V vs. 26 V), allowing direct substitution only when the LED string voltage margin supports the higher threshold.
TPS61161DRVR 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)
TPS61161DRVR FAQ
1.How can I place an order for TPS61161DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161DRVR 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 TPS61161DRVR reliable?
The price and inventory of TPS61161DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161DRVR is usually 5 days.
3.What payment methods are accepted for TPS61161DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161DRVR?
TPS61161DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161DRVR 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 TPS61161DRVR?
For technical support, including TPS61161DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161DRVR requirements.
6.How does Aetrix verify that TPS61161DRVR is sourced from the original manufacturer or authorized distributors?
All TPS61161DRVR 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 TPS61161DRVR meets industry standards.
7.What is the process for return or replacement of TPS61161DRVR?
All TPS61161DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161DRVR, 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 TPS61161DRVR part is unused and in its original packaging.
Return procedure for TPS61161DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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