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Texas Instruments TPS61161DRVTG4
- Part No.:
- TPS61161DRVTG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161DRVTG4.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,380
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Product details
Overview
TPS61161DRVTG4 from Texas Instruments is a high-efficiency white LED boost driver IC with integrated 40-V/0.7-A N-channel switch FET, 600-kHz fixed-frequency PWM control, 200-mV ±2% feedback reference, and dual dimming support (EasyScale™ one-wire digital and external PWM). It drives up to 10-series white LEDs in portable media displays requiring precise current regulation and low audible noise.
For engineers reviewing the TPS61161DRVTG4 datasheet, TPS61161DRVTG4 pinout, TPS61161DRVTG4 application, or TPS61161DRVTG4 equivalent, key selection criteria include 38-V open-LED protection threshold, 2.7–18-V input range, 200-mV FB regulation accuracy, thermal shutdown at 160°C, and WSON-6 package compatibility with exposed thermal pad for power dissipation.
Technical Context
The TPS61161DRVTG4 implements current-mode PWM control with slope compensation for stable operation above 50% duty cycle. Its error amplifier regulates FB to 200 mV using an external RSET resistor, enabling precise LED current programming (e.g., 20 mA with 10 Ω). The CTRL pin serves triple function: enable/disable, PWM dimming input, and EasyScale™ command interface.
Open-LED protection monitors both SW node voltage (38 V typical threshold) and FB voltage (<100 mV) across eight switching cycles before shutdown. Soft-start ramps FB voltage in 32 steps over ~6.8 ms while limiting startup current to ≤400 mA for 5 ms-critical for input capacitor stress reduction in battery-powered systems.
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), dual-cell NiMH (2.4–3.0 V), and 5-V/12-V rail inputs without pre-regulation. |
| Open LED Protection | 38 V (typical) on SW pin - enables safe operation with up to 10-series white LEDs (e.g., 3.2 V × 10 + 200 mV = 32.2 V < 38 V). |
| Feedback Reference | 200 mV ±2% - sets LED current via RSET = 200 mV / ILED; 2% tolerance directly impacts output current accuracy. |
| Switching Frequency | 600 kHz (±100 kHz) - allows compact 22-μH inductor (TDK VLCF5020T-220MR75-1) and low-ESR 220-nF ceramic output capacitor. |
| Efficiency | Up to 90% - achieved at 20 mA load with 3.6-V input and 8-LED string; reduces thermal load in space-constrained handhelds. |
| Quiescent Current | 1.8 mA - minimizes standby power draw in always-on display backlight systems. |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects silicon during sustained high-current or poor PCB heat sinking conditions. |
Pinout & Package
TPS61161DRVTG4 uses a 2-mm × 2-mm WSON-6 package with exposed thermal pad (DRV suffix), optimized for thermal performance in ultra-thin portable designs. The thermal pad must be soldered to analog ground plane with thermal vias for reliable 125°C junction operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 2.7–18 V; connects to input capacitor (Murata GRM188R61E105K, 1 μF) and inductor L1. |
| SW | Switch node | Drives external inductor (L1); monitored for 38-V open-LED protection; requires low-inductance layout. |
| FB | Current sense feedback | Regulated to 200 mV; connects to RSET (10 Ω) between FB and GND to set LED current (e.g., 20 mA). |
| GND | Ground reference | Analog ground return for FB, COMP, and thermal pad; must be low-impedance plane under device. |
| CTRL | Multi-function control | Enables device (high), shuts down (low ≥2.5 ms), accepts PWM dimming, or receives EasyScale™ commands. |
| COMP | Error amplifier output | Connects to 220-nF compensation capacitor (Murata GRM21BR71H105K); stabilizes current-loop response. |
Key Features
| Feature | Design Value |
|---|---|
| No-audible-noise dimming | Internal PWM-to-analog conversion filters CTRL input to modulate DC LED current-not pulsed current-eliminating capacitor squeal. |
| Dual dimming interface | Hardware-selectable: PWM dimming (5–100 kHz) or EasyScale™ one-wire (32-step pseudo-logarithmic brightness control). |
| Built-in soft start | Ramps FB voltage in 32 steps (213 μs/step); limits startup inrush and holds current limit at 400 mA for first 5 ms. |
| Integrated protection | 38-V open-LED shutdown, 2.5-V undervoltage lockout (70-mV hysteresis), and 160°C thermal shutdown with auto-recovery. |
| High-efficiency topology | 600-kHz fixed-frequency current-mode boost achieves >90% efficiency with 22-μH inductor and Schottky diode (ONsemi MBR0540T1). |
Applications
| Cellular Phone Backlight | Portable Media Player Display |
|---|---|
|
Use Scenario: Driving 6–8 white LEDs in narrow bezel smartphone LCD backlight with battery input (3.6 V nominal). IC Role / Device Role / Timing Role: Boost converter regulating constant LED current; provides 38-V OVP margin for LED forward voltage drift at temperature. Use Value: 90% efficiency extends talk time; no-audible-noise dimming prevents capacitor whine during video playback. |
Use Scenario: Powering 10-series white LEDs in 4.3-inch portable media player with variable brightness control. IC Role / Device Role / Timing Role: High-voltage boost driver with EasyScale™ interface enabling microcontroller-free brightness adjustment via single-wire protocol. Use Value: Reduces MCU GPIO count and firmware overhead; 32-step logarithmic dimming matches human eye perception. |
| Ultra-Mobile PC Display | GPS Receiver Backlight |
|
Use Scenario: Backlighting 7-inch WVGA LCD in fanless UMPC with 5-V system rail and thermal constraints. IC Role / Device Role / Timing Role: Compact WSON-6 LED driver delivering regulated current while dissipating heat through exposed thermal pad. Use Value: 2-mm × 2-mm footprint saves PCB area; thermal shutdown (160°C) prevents damage during extended outdoor operation. |
Use Scenario: Driving 4–6 white LEDs in ruggedized GPS receiver with wide ambient temperature range (–40°C to +85°C). IC Role / Device Role / Timing Role: Robust LED driver maintaining 200-mV FB accuracy across temperature for consistent brightness calibration. Use Value: ±2% reference tolerance ensures factory-set brightness remains stable over lifetime and temperature cycling. |
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 |
|---|---|---|---|
| TPS61160DRVT | 26-V open-LED protection (vs. 38 V); identical pinout, package, and dimming features. | Suitable for ≤6-series LED strings (e.g., 3.2 V × 6 + 200 mV = 19.4 V < 26 V); lower OVP margin for high-Vf LEDs. | Select when driving fewer LEDs or when lower OVP threshold simplifies output capacitor voltage rating (e.g., 25-V cap). |
| MAX16832AATA+ | 36-V OVP; 1.2-MHz switching; requires external MOSFET; different pinout and control interface. | Targets higher-power LED arrays; lacks integrated switch and EasyScale™; needs external current-sense amp. | Choose for designs needing >0.7-A switch current or higher frequency to shrink magnetics; not drop-in compatible. |
Compared with TPS61161DRVTG4, TPS61160DRVT offers lower OVP headroom but identical layout and firmware integration, while MAX16832AATA+ trades integration for flexibility in high-current or high-frequency applications-requiring redesign of power stage and control logic.
Availability
TPS61161DRVTG4 is available at Aetrix Electronics and suitable for cellular phone backlighting, portable media player displays, and ultra-mobile PC displays requiring stable component supply, long-term lifecycle support, and automotive-grade reliability screening.
Supply support for TPS61161DRVTG4 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 designing analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS6116x product line delivers highly integrated white LED drivers for portable displays, emphasizing low-noise operation, dual-dimming flexibility, and robust protection in miniature WSON packages.
FAQ
What is the maximum number of white LEDs the TPS61161DRVTG4 can drive?
The TPS61161DRVTG4 supports up to 10-series white LEDs, determined by its 38-V open-LED protection threshold. With a typical white LED forward voltage of 3.2 V and 200-mV FB reference, the maximum string voltage is (10 × 3.2 V) + 0.2 V = 32.2 V, staying safely below the 38-V OVP limit. Exceeding this risks premature shutdown during LED Vf drift at temperature or aging.
How does the TPS61161DRVTG4 achieve no-audible-noise dimming?
The TPS61161DRVTG4 avoids audible noise by internally filtering the PWM signal applied to the CTRL pin and using the resulting analog voltage to modulate the 200-mV FB reference-keeping LED current DC rather than pulsed. This eliminates mechanical vibration in output capacitors (e.g., Murata GRM21BR71H105K) that occurs with direct PWM current switching, critical for video playback in portable media players.
What is the role of the COMP pin on the TPS61161DRVTG4?
The COMP pin on the TPS61161DRVTG4 is the output of the transconductance error amplifier and must be connected to a 220-nF ceramic capacitor (Murata GRM21BR71H105K) to ground for loop stability. This capacitor sets the compensation pole-zero network, ensuring stable current regulation across input voltage, load, and temperature variations without oscillation or overshoot during dimming transitions.
Can the TPS61161DRVTG4 operate from a 3.3-V supply?
Yes, the TPS61161DRVTG4 operates from 2.7 V to 18 V, making 3.3-V supplies fully supported. At 3.3 V input, it can drive up to 8-series white LEDs (e.g., 3.2 V × 8 + 0.2 V = 25.8 V) within the 38-V OVP margin. Efficiency remains >85% at 20 mA, and undervoltage lockout (2.5 V typical) ensures reliable startup even with brownout conditions.
What external components are required for basic TPS61161DRVTG4 operation?
Minimum external components for TPS61161DRVTG4 include: input capacitor (1 μF Murata GRM188R61E105K), inductor (22 μH TDK VLCF5020T-220MR75-1), Schottky diode (ONsemi MBR0540T1), output capacitor (220 nF Murata GRM21BR71H105K), and current-sense resistor (10 Ω for 20 mA). COMP and FB require no additional passive components beyond those specified.
TPS61161DRVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
TPS61161DRVTG4 FAQ
1.How can I place an order for TPS61161DRVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161DRVTG4 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 TPS61161DRVTG4 reliable?
The price and inventory of TPS61161DRVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161DRVTG4 is usually 5 days.
3.What payment methods are accepted for TPS61161DRVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161DRVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161DRVTG4?
TPS61161DRVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161DRVTG4 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 TPS61161DRVTG4?
For technical support, including TPS61161DRVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161DRVTG4 requirements.
6.How does Aetrix verify that TPS61161DRVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS61161DRVTG4 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 TPS61161DRVTG4 meets industry standards.
7.What is the process for return or replacement of TPS61161DRVTG4?
All TPS61161DRVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161DRVTG4, 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 TPS61161DRVTG4 part is unused and in its original packaging.
Return procedure for TPS61161DRVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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