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Texas Instruments TPS61161DRVRG4
- Part No.:
- TPS61161DRVRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61161DRVRG4.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
TPS61161DRVRG4 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, 38-V open-LED protection, 200-mV ±2% feedback reference, and dual-mode digital (EasyScale™) or PWM brightness dimming. It drives up to 10-series white LEDs in portable media displays requiring stable current regulation and low audible noise.
For engineers reviewing the TPS61161DRVRG4 datasheet, TPS61161DRVRG4 pinout, TPS61161DRVRG4 application, or TPS61161DRVRG4 equivalent, key selection criteria 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 TPS61161DRVRG4 implements current-mode PWM control with slope compensation for duty cycles >50%, regulating FB to 200 mV via an internal transconductance error amplifier (240–400 μmho) and external COMP capacitor. Its 600-kHz oscillator enables compact magnetics (e.g., 22-μH inductor) and reduces output ripple without burst-mode operation.
Open-LED protection monitors both SW node voltage (>38 V) and FB voltage (<100 mV) for ≥8 switching cycles before disabling the FET; shutdown recovery requires CTRL pin toggle. Dimming mode-PWM or EasyScale-is latched at power-up and persists until forced reset via 2.5-ms CTRL low pulse.
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) - prevents overvoltage damage when driving up to 10-series LEDs with max forward voltage ≤3.6 V each. |
| Feedback Reference | 200 mV ±2% - enables precise LED current setting with low-power RSET (e.g., 10 Ω for 20 mA), minimizing I²R loss. |
| Switching Frequency | 600 kHz (±100 kHz) - allows use of small 22-μH inductors and <1-μF input capacitors while maintaining >90% efficiency. |
| Quiescent Current | 1.8 mA - ensures minimal battery drain during active LED operation in always-on display applications. |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
| Shutdown Current | 1 μA - extends battery life in standby mode by cutting supply draw to near-zero. |
Pinout & Package
TPS61161DRVRG4 uses a thermally enhanced 2-mm × 2-mm WSON-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 |
|---|---|---|
| VIN | Power input | Accepts 2.7–18 V DC; connects to input capacitor (≥1 μF) and inductor high-side terminal. |
| SW | Switch node | Drives inductor low-side; monitored for open-LED protection; requires low-inductance Schottky diode path to output. |
| FB | Current-sense feedback | Regulated to 200 mV; connects to RSET resistor between LED cathode and GND to set LED current. |
| GND | Analog/digital ground | Reference for all internal circuits; must be low-impedance connection to thermal pad and system ground plane. |
| CTRL | Multi-function control | Enables device (high), initiates shutdown (low ≥2.5 ms), accepts PWM dimming signal, or hosts EasyScale™ one-wire protocol. |
| COMP | Error amplifier output | Connects to external compensation capacitor (e.g., 220 nF) to stabilize loop response and prevent oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| No-audible-noise dimming | Eliminates PWM-induced capacitor squeal by modulating DC LED current-not pulsing it-via filtered reference voltage scaling. |
| Programmable FB reference | Supports 32-step EasyScale™ digital dimming (0–200 mV) or analog PWM dimming (5–100 kHz), enabling logarithmic brightness curves and processor sleep. |
| Integrated soft-start | Ramps FB voltage in 32 steps (213 μs/step) to limit inrush current; halves switch current limit for first 5 ms to cap peak input draw at ~400 mA. |
| Robust fault protection | Combines 38-V open-LED detection, 160°C thermal shutdown, 2.2-V undervoltage lockout (70-mV hysteresis), and 0.3–0.6-Ω switch RDS(on). |
| Space-optimized layout | 2-mm × 2-mm WSON-6 footprint with thermal pad enables ultra-thin designs; compatible with standard 0402/0603 passives and 22-μH shielded inductors. |
Applications
| Cellular Phone Display Backlight | Portable Media Player LCD |
|---|---|
|
Use Scenario: Driving 6–8 white LEDs in series behind a 3.5-inch TFT-LCD in a smartphone with Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Boost converter regulating constant LED current (20 mA) via FB pin; provides 24–32 V output with 38-V OVP margin. Use Value: Enables uniform brightness across display without factory calibration; eliminates audible noise during video playback via analog dimming. |
Use Scenario: Powering 10-series white LEDs for a 4.3-inch WVGA LCD in an MP4 player operating from dual AA batteries (1.8–3.2 V). IC Role / Device Role / Timing Role: High-efficiency boost driver delivering >90% conversion at 20 mA; uses PWM dimming synchronized to UI refresh rate. Use Value: Extends battery runtime by minimizing quiescent current (1.8 mA) and enabling deep-sleep processor control via EasyScale™. |
| GPS Receiver Backlight | Ultra-Mobile PC Display |
|
Use Scenario: Illuminating a 2.8-inch monochrome LCD in an automotive GPS unit with wide-input 9–16 V supply and thermal constraints. IC Role / Device Role / Timing Role: LED driver with 160°C thermal shutdown and 38-V OVP; operates across full input range without external LDO pre-regulator. Use Value: Ensures reliable backlight operation under engine-cold cranking (9 V) and hot ambient (85°C), reducing BOM count. |
Use Scenario: Backlighting a 7-inch resistive touchscreen in a ruggedized UMPC powered by 3.7-V Li-poly battery with space-limited PCB area. IC Role / Device Role / Timing Role: Compact WSON-6 LED driver supporting 22-μH inductor and 220-nF COMP capacitor; integrates soft-start to prevent input rail sag. Use Value: Saves >3 mm² board space vs. QFN alternatives while maintaining 90% efficiency at 15 mA load for extended field use. |
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 dimming interface; lower OVP threshold limits max LED string voltage. | Suitable for ≤6-series LED strings (e.g., 3.0-V LEDs × 6 = 18 V + 200 mV < 26 V); not safe for 10-LED configurations. | Select TPS61160DRVR only when total LED string VF(max) + 200 mV ≤ 26 V; otherwise TPS61161DRVRG4 is required. |
| MAX16832ATA+T | 40-V rated switch; 2.5–28-V input; 200-mV FB reference; but uses analog-only dimming (no EasyScale™) and larger 3-mm × 3-mm TDFN. | Requires external PWM generator; lacks digital dimming for processor sleep; higher RθJA (110°C/W) demands more thermal copper. | Choose MAX16832ATA+T only if EasyScale™ is unnecessary and board area permits larger package; verify thermal performance at 20 mA. |
Compared with TPS61160DRVR, TPS61161DRVRG4 enables longer LED strings (up to 10) with 38-V OVP headroom; compared with MAX16832ATA+T, it offers integrated digital dimming and superior thermal performance in a smaller footprint.
Availability
TPS61161DRVRG4 is available at Aetrix Electronics and suitable for cellular phone displays, portable media players, GPS receivers, and ultra-mobile PC backlighting requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS61161DRVRG4 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 ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS6116x product line delivers highly integrated white LED drivers optimized for space-constrained portable displays, emphasizing efficiency, low noise, and flexible dimming to extend battery life and simplify system design.
FAQ
What is the maximum number of white LEDs the TPS61161DRVRG4 can drive in series?
The TPS61161DRVRG4 supports up to 10-series white LEDs, based on its 38-V open-LED protection threshold and 200-mV feedback reference. For example, with LEDs having a maximum forward voltage of 3.6 V each, the total string voltage (10 × 3.6 V + 0.2 V) equals 36.2 V, remaining safely below the 38-V OVP limit. Always confirm actual LED VF(max) at operating temperature and current per manufacturer datasheet before final design.
Does the TPS61161DRVRG4 require external compensation components?
Yes, the TPS61161DRVRG4 requires an external capacitor connected between the COMP pin and GND to stabilize the control loop. A typical value is 220 nF, selected based on inductor value (e.g., 22 μH) and output capacitance. The compensation network ensures phase margin >45° across load and input voltage ranges; omitting it risks oscillation or poor transient response. Refer to TI's SLVA471 application note for detailed design guidance.
How does the TPS61161DRVRG4 achieve no-audible-noise dimming?
The TPS61161DRVRG4 avoids audible noise by modulating the DC LED current-not pulsing it-using either PWM or EasyScale™ dimming. In PWM mode, the CTRL pin signal filters internally to scale the 200-mV reference voltage linearly with duty cycle, resulting in smooth analog current adjustment. This eliminates mechanical vibration in output capacitors caused by direct PWM current switching, a common issue in competing boost LED drivers.
Can the TPS61161DRVRG4 operate from a 2.5-V input supply?
No, the TPS61161DRVRG4 cannot reliably operate from 2.5 V. Its absolute minimum input voltage is 2.7 V, and undervoltage lockout activates below 2.2 V (with 70-mV hysteresis). At 2.5 V, the device may fail to start or exhibit unstable regulation. For sub-2.7-V systems, consider alternative drivers such as the TPS6106x family or add a low-dropout pre-regulator to ensure VIN remains ≥2.7 V across battery discharge.
Is the TPS61161DRVRG4 pin-compatible with the TPS61160DRVR?
Yes, the TPS61161DRVRG4 is pin-compatible with the TPS61160DRVR in the same WSON-6 (DRV) package, sharing identical pin configuration, electrical interface, and footprint. However, they differ in open-LED protection threshold (38 V vs. 26 V) and part marking; substituting one for the other requires verifying that the LED string voltage stays within the respective OVP limit to avoid premature shutdown or device stress.
TPS61161DRVRG4 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)
TPS61161DRVRG4 FAQ
1.How can I place an order for TPS61161DRVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61161DRVRG4 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 TPS61161DRVRG4 reliable?
The price and inventory of TPS61161DRVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61161DRVRG4 is usually 5 days.
3.What payment methods are accepted for TPS61161DRVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61161DRVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61161DRVRG4?
TPS61161DRVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61161DRVRG4 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 TPS61161DRVRG4?
For technical support, including TPS61161DRVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61161DRVRG4 requirements.
6.How does Aetrix verify that TPS61161DRVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS61161DRVRG4 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 TPS61161DRVRG4 meets industry standards.
7.What is the process for return or replacement of TPS61161DRVRG4?
All TPS61161DRVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS61161DRVRG4, 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 TPS61161DRVRG4 part is unused and in its original packaging.
Return procedure for TPS61161DRVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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