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Texas Instruments TPS61158DRVR
- Part No.:
- TPS61158DRVR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
TPS61158DRVR.pdf
- Description:
- IC LED DRVR RGLTR PWM 30MA 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:7,135
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Product details
Overview
TPS61158DRVR from Texas Instruments is a 30-V WLED boost driver IC with integrated 0.6-A/30-V switch FET and power diode, operating at 750-kHz fixed frequency to drive up to 8 series white LEDs. It regulates LED current via 200-mV FB reference voltage across external RFB (10 Ω), supports 2.7–5.5-V input, and delivers up to 29-V open-LED protection for portable display backlighting.
For engineers reviewing the TPS61158DRVR datasheet, TPS61158DRVR pinout, TPS61158DRVR application, or TPS61158DRVR equivalent, key selection criteria include integrated diode elimination of external Schottky, dual dimming modes (PWM and EasyScale™ 1-wire), 100:1 dimming ratio, thermal shutdown at 160°C, and WSON-6 package compatibility with space-constrained mobile designs.
Technical Context
The TPS61158DRVR implements current-mode PWM control with slope compensation for stable operation above 50% duty cycle. Its error amplifier regulates FB to 200 mV ±3 mV while internal loop compensation eliminates external compensation components.
It features dual-dimming mode selection on power-up: default PWM dimming (FB = Duty × 200 mV) or programmable 1-wire EasyScale™ interface supporting 32 logarithmic brightness steps. Open-LED protection triggers at 28.2 V (typical) with simultaneous FB < 100 mV detection, disabling the switch FET and holding VOUT near VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion/Li-poly and 3.3-V system rails without LDO pre-regulation |
| Switch FET Rating | 0.6-A, 30-V N-channel MOSFET - enables direct driving of 6–8 white LEDs (VF ≈ 3.0–3.6 V each) in series |
| Feedback Reference | 200 mV ±3 mV - sets LED current via RFB = 200 mV / ILED; reduces sense resistor power loss vs. 1-V references |
| Switching Frequency | 750 kHz (600–900 kHz range) - allows use of small 10–22 µH inductors and compact 1–2.2 µF output capacitors |
| Dimming Ratio | 100:1 (PWM mode) - achieves deep dimming without audible capacitor noise due to analog-filtered DC current modulation |
| Open LED Protection | 28.2 V threshold - prevents overvoltage damage during LED string disconnection; disables switching and clamps VOUT to VIN |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects silicon integrity under sustained high-current or poor PCB thermal design |
Pinout & Package
TPS61158DRVR uses a thermally enhanced 6-pin WSON package (2.0 mm × 2.0 mm, 0.75-mm height) with exposed thermal pad soldered to analog ground plane for optimal power dissipation (RθJB = 39.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CTRL | Multi-function control input | Enables device, selects PWM or EasyScale™ dimming mode, and accepts logic-level PWM signal (20–100 kHz) or digital commands |
| 2 - VIN | Main power input | Accepts 2.7–5.5-V supply; connects to input capacitor (2.2 µF) and inductor (10–22 µH); UVLO activates below 2.2 V |
| 3 - VOUT | Boost converter output | Drives LED anodes; maximum 29-V rating supports up to 8-series white LEDs; open-circuit voltage limited to 28.2 V |
| 4 - FB | Current-sense feedback | Regulated to 200 mV; connects to RFB (10 Ω typical) between FB and GND to set ILED = 20 mA per step |
| 5 - GND | Power and signal ground | Reference node for all internal circuits; must be connected to thermal pad and low-impedance ground plane |
| 6 - LX | Switching node | Connects inductor between VIN and LX; carries pulsed current; requires short, low-inductance layout to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Diode | Eliminates need for external Schottky diode, reducing BOM count, board area, and forward-voltage losses |
| Flexible Dimming Interface | Supports both hardware PWM (no processor overhead) and software-configurable EasyScale™ 1-wire (32-step logarithmic brightness) |
| Built-in Soft Start | Ramps FB voltage in 32 steps (341 µs/step) to limit inrush current; startup current limit reduced to 360 mA (typical) |
| Integrated Loop Compensation | Removes requirement for external compensation network, simplifying design and improving stability across load/temperature |
| WLED Open Protection | Detects open LED string by monitoring VOUT ≥28.2 V and FB < 100 mV simultaneously, then shuts down switch FET |
Applications
| Smartphone Backlight | Feature Phone Display |
|---|---|
Use Scenario: Driving 6–8 white LEDs in series for main LCD backlight in compact smartphone form factor with tight thermal and space constraints. IC Role / Device Role / Timing Role: WLED boost controller providing regulated constant-current source with integrated switch and diode, eliminating discrete power components. Use Value: Enables single-chip solution with 750-kHz switching, reducing inductor size to 2.2 mm × 2.2 mm and total solution footprint under 25 mm². | Use Scenario: Powering QVGA or HVGA LCD backlight in cost-sensitive feature phones requiring robust open-circuit protection and low quiescent current. IC Role / Device Role / Timing Role: Constant-current LED driver with 2.7–5.5-V input compatibility and built-in UVLO/thermal shutdown for battery-powered reliability. Use Value: Delivers 20 mA per LED at >85% efficiency across input range, extending talk time while preventing LED failure from accidental open-circuit conditions. |
| Portable Media Player | GPS Receiver Display |
Use Scenario: Illuminating high-resolution OLED or TFT displays in handheld media players where audio-noise-free dimming is critical. IC Role / Device Role / Timing Role: Analog-dimming WLED driver using filtered PWM to modulate DC LED current-eliminating audible capacitor squeal during brightness changes. Use Value: Achieves 100:1 dimming ratio with no perceptible noise, meeting consumer audio quality requirements without added filtering components. | Use Scenario: Backlighting monochrome or color LCDs in automotive-grade GPS receivers operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Thermally robust LED driver with 160°C shutdown and 39.8°C/W junction-to-board resistance for reliable operation in sealed enclosures. Use Value: Maintains stable LED current over temperature via 200-mV FB reference and integrated thermal protection, ensuring consistent display brightness in varying environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61160DRVR | Same WSON-6 package, but 40-V switch, 1.2-A current limit, and 1.2-MHz switching frequency; lacks integrated diode and EasyScale™ interface | Requires external Schottky diode; supports higher LED counts (up to 12) but increases BOM and layout complexity | Choose when higher output voltage (>29 V) or higher current capability is required, and external diode integration is acceptable |
| MAX8646ETE+ | 36-V rated, 1.2-A switch, 1-MHz frequency, integrated diode, but uses I²C interface instead of 1-wire/PWM; different pinout (16-pin TQFN) | Requires I²C host controller and additional pull-up resistors; offers more flexible register-based configuration but larger footprint | Choose when system already includes I²C infrastructure and advanced diagnostics (fault reporting, current readback) are needed |
Compared with TPS61158DRVR, TPS61160DRVR trades integrated diode and digital dimming for higher voltage/current headroom, while MAX8646ETE+ replaces simplicity with configurability and communication protocol flexibility-making TPS61158DRVR optimal for cost- and space-constrained mobile backlighting where ease of implementation and minimal external components are prioritized.
Availability
TPS61158DRVR is available at Aetrix Electronics and suitable for smartphone backlighting, feature phone displays, and portable media player illumination requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS61158DRVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The TPS61158DRVR belongs to TI's WLED backlight driver product line, engineered specifically for high-efficiency, low-noise, space-constrained mobile display illumination with integrated power stages and simplified digital/analog dimming interfaces.
FAQ
What is the recommended inductor value for TPS61158DRVR in a typical 6-LED application?
The TPS61158DRVR datasheet specifies an inductor range of 10 µH to 22 µH. For a typical 6-white-LED application (VOUT ≈ 18.3 V at 20 mA), a 15-µH, 0.6-A saturation current shielded inductor with low DCR (e.g., 120 mΩ) is recommended to balance ripple current (<30% of ILED), efficiency (>87%), and physical size. Layout must minimize trace inductance between VIN, LX, and the inductor.
How does the TPS61158DRVR implement analog dimming without audible noise?
The TPS61158DRVR applies PWM to the CTRL pin but internally filters it with a low-pass network before feeding it to the error amplifier. This results in a DC reference voltage (VFB = Duty × 200 mV) that modulates LED current continuously-not pulsing it-so no high-frequency current ripple appears across the output capacitor. Consequently, no piezoelectric "squeal" occurs, even at dimming ratios down to 1%.
Can the TPS61158DRVR drive fewer than 2 LEDs, and what limits the minimum LED count?
No, the TPS61158DRVR is not designed for fewer than 2 LEDs. The minimum LED count is constrained by the 28.2-V open-LED protection threshold and the need for sufficient forward voltage to reverse-bias the integrated power diode during shutdown. With only 1 LED (VF ≈ 3.3 V), the diode remains forward-biased, allowing leakage current to illuminate the LED unintentionally-even in shutdown mode.
What is the function of the thermal pad on the TPS61158DRVR WSON package?
The exposed thermal pad on the TPS61158DRVR WSON-6 package serves as the primary heat dissipation path, electrically connected to GND. It must be soldered to a solid copper ground plane with ≥4 thermal vias (0.3-mm diameter, spaced ≤1 mm apart) to achieve the specified RθJB of 39.8°C/W. Omitting this compromises thermal performance and risks premature thermal shutdown under full-load conditions.
How does the TPS61158DRVR handle undervoltage lockout (UVLO) during battery discharge?
The TPS61158DRVR features a 2.2-V to 2.35-V UVLO threshold with 275-mV hysteresis. When VIN drops below ~2.2 V, the device shuts down completely (IQ < 1 µA). Once VIN recovers above ~2.5 V, the internal soft-start sequence reinitiates, ramping FB voltage in 32 steps to prevent inrush current. This ensures graceful shutdown and restart during Li-ion battery sag or cold-temperature discharge.
TPS61158DRVR 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):
- 5.5V
- Voltage - Output:
- 2.7V ~ 29V
- Current - Output / Channel:
- 30mA
- Frequency:
- 750kHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (2x2)
TPS61158DRVR FAQ
1.How can I place an order for TPS61158DRVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61158DRVR 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 TPS61158DRVR reliable?
The price and inventory of TPS61158DRVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61158DRVR is usually 5 days.
3.What payment methods are accepted for TPS61158DRVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61158DRVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61158DRVR?
TPS61158DRVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61158DRVR 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 TPS61158DRVR?
For technical support, including TPS61158DRVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61158DRVR requirements.
6.How does Aetrix verify that TPS61158DRVR is sourced from the original manufacturer or authorized distributors?
All TPS61158DRVR 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 TPS61158DRVR meets industry standards.
7.What is the process for return or replacement of TPS61158DRVR?
All TPS61158DRVR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61158DRVR, 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 TPS61158DRVR part is unused and in its original packaging.
Return procedure for TPS61158DRVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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