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Texas Instruments TPS61161ADRVR
- Part No.:
- TPS61161ADRVR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161ADRVR.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:7,750
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Product details
Overview
TPS61161ADRVR from Texas Instruments is a high-efficiency, 38-V open-LED-protected white LED boost driver IC in a 2-mm × 2-mm WSON-6 package with thermal pad. It operates from 2.7 V to 18 V input, delivers up to 20 mA LED current via external RSET, regulates FB to 200 mV ±2%, and supports PWM brightness control at 5–100 kHz for noise-free analog dimming in portable backlight systems.
For engineers reviewing the TPS61161ADRVR datasheet, TPS61161ADRVR pinout, TPS61161ADRVR application, or TPS61161ADRVR equivalent, this page provides verified pin functions, exact open-LED protection threshold (38 V), confirmed 600-kHz fixed-frequency operation, real-world efficiency curves (up to 90%), and validated alternative part selection guidance for white LED backlighting designs.
Technical Context
The TPS61161ADRVR implements current-mode PWM control with integrated 40-V/0.7-A N-channel MOSFET switch and built-in slope compensation for stable operation above 50% duty cycle. Its error amplifier features 240–400 μmho transconductance and 6 MΩ output resistance, with COMP pin supporting external compensation via a capacitor.
Open LED protection monitors both SW node voltage (38 V threshold) and FB voltage (<100 mV) across eight consecutive switching cycles before disabling the FET. Soft-start ramps FB reference in 32 steps over 213 μs per step, while startup current limit remains at 400 mA for 5 ms to suppress 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) on SW pin - enables safe driving of up to 10-series white LEDs (e.g., 10 × 3.3 VF + 0.2 VD + 0.2 VREF = 33.4 V) |
| Feedback Reference | 200 mV ±2% - minimizes power loss in RSET and enables precise LED current setting (e.g., 20 mA with 10 Ω) |
| Switching Frequency | 600 kHz (±100 kHz) - allows use of compact 22 μH inductors and reduces output ripple vs lower-frequency alternatives |
| PWM Dimming Range | 5 kHz to 100 kHz - avoids audible noise while maintaining analog dimming behavior via internal VREF modulation |
| Quiescent Current | 1.8 mA - ensures low standby power in battery-powered devices during active operation |
| Shutdown Current | 1 μA max - extends battery life when CTRL is held low for >2.5 ms |
Pinout & Package
TPS61161ADRVR uses a thermally enhanced 2-mm × 2-mm × 0.8-mm WSON-6 package with exposed thermal pad soldered to analog ground plane. The pad must be connected via thermal vias for reliable 125°C junction operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (Pin 1) | Current-sense feedback input | Regulated to 200 mV; connects to low-side RSET to set LED current; triggers OLP if <100 mV for 8 cycles |
| GND (Pin 3) | Power and signal ground reference | Common return for VIN, SW, CTRL, COMP, and FB; must be low-impedance path to thermal pad |
| SW (Pin 4) | Switch node | Connects to inductor and Schottky anode; monitored for 38-V OLP; carries peak-switching current up to 0.84 A |
| VIN (Pin 6) | Main power input | Supplies internal circuitry and switch; requires ≥1 μF ceramic input capacitor close to pin |
| CTRL (Pin 5) | Enable/dimming control input | Logic-level enable (VIH ≥1.2 V); accepts 5–100 kHz PWM for analog dimming; shutdown if held low >2.5 ms |
| COMP (Pin 2) | Error amplifier output | Drives external RC compensation network; sources/sinks ±100 μA; crossover frequency ~500 kHz with 5 pF |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 40-V/0.7-A N-FET | Eliminates external high-voltage switch; supports 38-V OLP and 10-LED strings without external clamp |
| Built-in soft start | Ramps FB reference in 32 steps (213 μs each) to limit inrush; holds startup current limit at 400 mA for 5 ms |
| True analog PWM dimming | Modulates internal 200-mV reference via CTRL PWM duty cycle - no LED current bursting or audible capacitor noise |
| Thermal shutdown with hysteresis | Shuts down at 160°C junction; auto-restarts at 145°C - prevents damage during sustained overload or poor PCB cooling |
| Undervoltage lockout (UVLO) | Disables operation below 2.2 V (70 mV hysteresis) - avoids erratic behavior during battery brownout or cold start |
Applications
| Smartphone LCD Backlight | Portable Media Player Display |
|---|---|
Use Scenario: Driving 8–10 white LEDs in series for high-brightness, uniform LCD backlight in sub-6-inch smartphones with Li-ion battery supply. IC Role / Device Role / Timing Role: Boost controller regulating constant LED current via FB pin; PWM dimming interface synchronizes brightness to UI events without flicker or noise. Use Value: 38-V OLP enables full 10-LED string support at 3.3 VF; 90% efficiency at 20 mA extends talk time; 2-mm WSON saves board space in tight bezel layouts. | Use Scenario: Powering dual 6-LED strings for front/rear displays in handheld gaming or navigation devices operating from 3.0–4.2 V battery. IC Role / Device Role / Timing Role: Single-chip LED driver handling ON/OFF enable and 100-Hz–10-kHz PWM dimming; COMP pin allows loop stability tuning for varying LED capacitance. Use Value: 200-mV FB reference minimizes RSET power loss; 600-kHz switching permits 22-μH inductor (TDK VLCF5020T-220MR75-1) with low DC resistance and compact footprint. |
| GPS Receiver Backlight | Ultra-Mobile PC Tablet Display |
Use Scenario: Providing consistent, low-noise backlight for outdoor-readable GPS units powered by 3.6-V NiMH or Li-ion packs. IC Role / Device Role / Timing Role: Constant-current source with UVLO (2.2 V) preventing malfunction during battery depletion; CTRL pin enables firmware-controlled brightness scaling. Use Value: 1-μA shutdown current preserves battery during sleep mode; 38-V OLP tolerates LED aging and forward-voltage drift over product lifetime. | Use Scenario: Driving 10-LED string for 7–10 inch tablet LCDs requiring high dynamic range and smooth dimming from 0.1% to 100%. IC Role / Device Role / Timing Role: Analog-dimming LED driver using PWM-modulated reference; FB regulation maintains ±2% current accuracy across temperature. Use Value: Internal slope compensation ensures stable current-mode control with recommended 22-μH inductor; thermal pad enables 125°C continuous operation in sealed enclosures. |
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 |
|---|---|---|---|
| TPS61160ADRVR | 26-V open-LED protection; identical pinout, package, and control interface | Suitable for ≤6-series LED strings (e.g., 6 × 3.3 VF + 0.2 VD + 0.2 VREF = 20.2 V) | Select when driving shorter LED strings where 38-V headroom is unnecessary and cost optimization is prioritized. |
| RT8532DGQW | 36-V OLP; 1.2-MHz switching; different pinout (8-pin WDFN); requires external compensation | Higher-frequency operation enables smaller inductors but increases EMI sensitivity in noise-critical RF sections | Choose for space-constrained designs needing <22-μH inductors, provided layout accommodates higher-frequency noise filtering. |
Compared with TPS61161ADRVR, TPS61160ADRVR offers identical functionality at lower OLP voltage for shorter LED strings, while RT8532DGQW trades pin compatibility for higher switching frequency and reduced passive size - neither is pin-compatible, but both serve overlapping portable backlight use cases with distinct trade-offs in protection margin and layout complexity.
Availability
TPS61161ADRVR is available at Aetrix Electronics and suitable for smartphone LCD backlighting, portable media player display systems, and ultra-mobile PC tablet backlighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61161ADRVR 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 ICs, with leadership in high-efficiency power conversion and precision analog solutions.
The TPS6116x family was designed specifically for space-constrained, battery-powered white LED backlighting in portable consumer electronics - emphasizing high integration, low quiescent current, and robust protection for unattended LED string operation.
FAQ
What is the maximum number of white LEDs the TPS61161ADRVR can drive in series?
The TPS61161ADRVR supports up to 10 white LEDs in series, based on its 38-V open-LED protection threshold. With typical white LED forward voltage of 3.3 V, plus 0.2 V Schottky drop and 0.2 V FB reference, the maximum supported string voltage is 33.4 V - safely within the 38-V OLP limit. Exceeding 10 LEDs risks triggering protection under worst-case VF conditions.
How does the TPS61161ADRVR achieve noise-free PWM dimming?
The TPS61161ADRVR achieves noise-free PWM dimming by modulating its internal 200-mV reference voltage using the CTRL pin's PWM duty cycle - not by pulsing the LED current directly. This results in true analog dimming where only the DC LED current changes, eliminating audible capacitor ringing and EMI spikes associated with burst-mode dimming. The internal low-pass filter ensures clean reference tracking across 5–100 kHz PWM frequencies.
What is the purpose of the COMP pin on the TPS61161ADRVR?
On the TPS61161ADRVR, the COMP pin is the output of the transconductance error amplifier and serves as the control node for loop compensation. It must be connected to an external RC network (capacitor to GND, optional series resistor) to stabilize the current-mode feedback loop. Typical design uses a 1-nF capacitor to GND, enabling 500-kHz crossover frequency and ensuring stability with recommended 22-μH inductors and standard LED capacitance.
Can the TPS61161ADRVR operate from a 3.0-V input supply?
Yes, the TPS61161ADRVR operates from 2.7 V to 18 V input, so 3.0 V is fully supported. At 3.0 V, it can still deliver regulated LED current up to 20 mA for 10-LED strings (requiring ~32 V output), leveraging its 600-kHz switching frequency and low RDS(on) (0.3–0.6 Ω) to maintain >85% efficiency. Undervoltage lockout releases at 2.5 V nominal, ensuring reliable startup from depleted batteries.
Is the thermal pad on the TPS61161ADRVR package required to be connected to ground?
Yes, the exposed thermal pad on the TPS61161ADRVR WSON-6 package must be soldered to the PCB's analog ground plane. Texas Instruments specifies this connection as mandatory for thermal performance - without it, junction temperature rises significantly, risking thermal shutdown at moderate loads. Use ≥4 thermal vias (0.3-mm diameter) under the pad connected to an inner ground plane to achieve the rated 125°C continuous operation.
TPS61161ADRVR 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)
TPS61161ADRVR FAQ
1.How can I place an order for TPS61161ADRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161ADRVR 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 TPS61161ADRVR reliable?
The price and inventory of TPS61161ADRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161ADRVR is usually 5 days.
3.What payment methods are accepted for TPS61161ADRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161ADRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161ADRVR?
TPS61161ADRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161ADRVR 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 TPS61161ADRVR?
For technical support, including TPS61161ADRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161ADRVR requirements.
6.How does Aetrix verify that TPS61161ADRVR is sourced from the original manufacturer or authorized distributors?
All TPS61161ADRVR 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 TPS61161ADRVR meets industry standards.
7.What is the process for return or replacement of TPS61161ADRVR?
All TPS61161ADRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161ADRVR, 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 TPS61161ADRVR part is unused and in its original packaging.
Return procedure for TPS61161ADRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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