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Texas Instruments TPS61166DSKT
- Part No.:
- TPS61166DSKT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TPS61166DSKT.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.1A 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,281
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Product details
Overview
TPS61166DSKT from Texas Instruments is a white LED driver IC with integrated 1.1-A/20-V N-channel switch FET and power diode, operating as a boost converter for driving up to 5 LEDs in series. It supports 2.5–6-V IC supply (VIN), 4.5–10-V battery input (VBAT), and delivers regulated output up to 17 V at VO pin - used in mobile phone LCD backlighting with fast 1-µs PWM-controlled LED on/off switching.
For engineers reviewing the TPS61166DSKT datasheet, TPS61166DSKT pinout, TPS61166DSKT application, or TPS61166DSKT equivalent, key selection criteria include its 1.2-MHz fixed-frequency peak current-mode control, 200-mV FB reference for precise LED current programming, burst-mode PWM dimming (60 Hz–40 kHz), and thermal shutdown protection at 150°C junction temperature.
Technical Context
The TPS61166DSKT implements peak current-mode control with built-in slope compensation to prevent sub-harmonic oscillation, using a fixed 1.2-MHz oscillator. Its dual-input architecture separates VIN (IC logic supply) from VBAT (power stage input), enabling flexible single- or two-cell Li-ion battery operation.
A high-side isolation FET between OUT and VO pins enables <1-µs LED current turn-on/off synchronization with external PWM signals, while preventing output capacitor discharge during dimming - eliminating audible ceramic capacitor noise. Protection includes OVP (18 V typ), OCP (1.1 A typ), OLP (300 mA), UVLO (1.55 V), and thermal shutdown (150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage (VIN) | 2.5 V to 6 V - powers internal circuitry only; independent of power stage. |
| Input voltage (VBAT) | 4.5 V to 10 V - supplies boost power stage; supports single- or two-cell Li-ion batteries. |
| Output voltage (VO) | Up to 17 V - regulates LED string voltage; OVP threshold is 18 V (typ). |
| Switch current limit | 1.1 A (typ) - sets maximum peak inductor current; enables drive for 5-series LEDs at ~160 mA. |
| Feedback reference | 200 mV (194–206 mV) - low-voltage reference allows precise LED current setting via external R1 resistor. |
| Switching frequency | 1.2 MHz (1.0–1.4 MHz) - fixed-frequency operation ensures predictable EMI profile and compact magnetics. |
| PWM dimming range | 60 Hz to 40 kHz - supports high-frequency dimming to avoid visible flicker and audible noise. |
| Operating temperature | –40°C to +85°C - qualified for consumer handheld and portable imaging applications. |
Pinout & Package
TPS61166DSKT uses a thermally enhanced 10-pin 2.5 mm × 2.5 mm SON (DSK) package with exposed thermal pad. The package supports high-power density and efficient heat dissipation when soldered to PCB ground plane with thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for all internal circuits and power stage; must connect to low-impedance PCB ground plane. |
| VIN (Pin 2) | IC supply input | Powers internal logic, bias, and control circuitry; decoupled with ≥4.7 µF ceramic capacitor. |
| VBAT (Pin 3) | Battery input | Directly feeds boost power stage; tied to VIN only in single-cell configurations; requires C3 pre-regulator cap in two-cell setups. |
| NC (Pin 4) | No-connect | Internally unused; TI recommends connecting to GND for mechanical stability and EMI reduction. |
| EN (Pin 5) | Enable control | Active-high logic input; 1-ms low pulse initiates shutdown (<1 µA quiescent current); controls pre-regulator in two-cell mode. |
| PWM (Pin 6) | Brightness control | Accepts external PWM signal (60 Hz–40 kHz); directly gates isolation FET for synchronous LED current switching with <1-µs delay. |
| FB (Pin 7) | Current sense feedback | Regulated at 200 mV; connects to LED cathode via external R1 to set LED current per ILED = 200 mV / R1. |
| OUT (Pin 8) | LED anode output | Connects to LED string anode; isolated from VO by internal high-side FET for fast PWM dimming without output discharge. |
| SW (Pin 9) | Boost switch node | Connects to inductor and internal N-channel FET drain; high dv/dt node requiring minimized trace area and ground-plane shielding. |
| VO (Pin 10) | Boost output | Regulated boost output node; monitored for OVP (18 V); connects to output capacitor and isolation FET source. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.1-A/20-V switch FET + power diode | Eliminates external discrete components; reduces BOM count and board space for LED backlight solutions. |
| Fast 1-µs LED current switching | Enables high-frequency PWM dimming without perceptible lag; preserves timing integrity in camera flash or video backlight sync. |
| Separate VIN and VBAT inputs | Allows optimized power routing: low-noise VIN for logic, high-current VBAT for boost stage - critical for noise-sensitive imaging systems. |
| Built-in soft-start | Ramps over-current limit in 8 steps over ~1.7 ms; limits inrush current during startup and prevents input voltage droop. |
| Overvoltage protection (OVP) | 18 V threshold on VO pin with 0.6 V hysteresis; protects LEDs and capacitors during open-circuit or transient overvoltage events. |
| Thermal shutdown with hysteresis | Triggers at 150°C junction temperature and resets at 135°C; prevents permanent damage during sustained overload or poor heatsinking. |
Applications
| Mobile Phone Backlight | Digital Camera Flash |
|---|---|
|
Use Scenario: Driving 4-series white LEDs in a slim smartphone display with dynamic brightness control. IC Role / Device Role / Timing Role: Boost converter + LED current controller with synchronized PWM dimming and input-to-output isolation. Use Value: Enables flicker-free, silent dimming across full brightness range using 1-kHz–40-kHz PWM signals without ceramic capacitor noise. |
Use Scenario: Powering high-brightness LED flash in compact digital cameras with rapid on/off sequencing. IC Role / Device Role / Timing Role: Fast-switching LED driver with <1-µs turn-on/off response for precise strobe timing control. Use Value: Supports microsecond-level flash duration accuracy required for motion freeze and low-light capture. |
| Personal Camcorder Display | SLR Viewfinder Illumination |
|
Use Scenario: Backlighting OLED/LCD viewfinder in handheld camcorders with battery-life-sensitive operation. IC Role / Device Role / Timing Role: Efficient boost regulator with 2.5–6-V VIN and 4.5–10-V VBAT support for dual-battery configurations. Use Value: Delivers >85% efficiency at 160 mA load with 3.6-V input, extending runtime without compromising brightness uniformity. |
Use Scenario: Illuminating optical viewfinder reticles in DSLR cameras where EMI must not interfere with sensor readout. IC Role / Device Role / Timing Role: Low-noise LED driver with minimized SW node radiation and grounded NC pin for EMI suppression. Use Value: Reduces conducted and radiated emissions through optimized layout guidance and integrated slope compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61165DSKT | Same 10-pin DSK package; lower 0.8-A switch current limit and 16-V OVP threshold. | Suitable for ≤4-LED strings at lower current; less headroom for 5-LED or high-brightness designs. | Select TPS61165DSKT only if peak LED current ≤800 mA and output voltage ≤16 V are sufficient. |
| LM3409QMHX/NOPB | External MOSFET controller; no integrated switch or diode; requires separate high-side gate driver and Schottky diode. | Offers higher flexibility in power stage design but increases component count, board area, and layout complexity. | Choose LM3409QMHX/NOPB when system-level thermal management or >1.1-A LED current is required beyond TPS61166DSKT's capability. |
Compared with TPS61166DSKT, TPS61165DSKT offers reduced integration and current capability for cost-sensitive 4-LED applications, while LM3409QMHX/NOPB trades integration for scalability and thermal headroom in high-power LED systems.
Availability
TPS61166DSKT is available at Aetrix Electronics and suitable for mobile phone backlighting, digital camera flash modules, and personal camcorder displays requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS61166DSKT 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 lighting control.
The TPS61166DSKT belongs to TI's white LED driver product line, engineered specifically for portable LCD/OLED backlighting with emphasis on fast PWM response, low-noise operation, and dual-input battery interface flexibility.
FAQ
What is the maximum number of LEDs the TPS61166DSKT can drive in series?
The TPS61166DSKT is specified to drive up to 5 white LEDs in series, assuming typical forward voltage of ~3.5 V per LED (total ~17.5 V), within its 17-V VO output rating and 18-V OVP threshold. At 3.6-V input, it sustains 160-mA LED current across 4 LEDs (11.5 V) with >85% efficiency, as verified in TI's typical application data.
Does the TPS61166DSKT require an external Schottky diode?
No, the TPS61166DSKT integrates both the 1.1-A/20-V N-channel switch FET and the power diode internally, eliminating the need for any external diode. This integration reduces solution size, improves reliability, and simplifies layout - confirmed in the device description, block diagram, and pin function table of the SLVS991 datasheet.
How does the TPS61166DSKT achieve silent PWM dimming without ceramic capacitor noise?
The TPS61166DSKT uses an internal high-side isolation FET between OUT and VO pins to disconnect the LED string from the output capacitor during PWM off-time. This prevents capacitor discharge and associated piezoelectric ringing, reducing audible noise to negligible levels - explicitly stated in the "DESCRIPTION" and "DETAILED DESCRIPTION" sections of the datasheet.
What is the purpose of separating VIN and VBAT pins on the TPS61166DSKT?
Separating VIN (2.5–6 V) and VBAT (4.5–10 V) enables independent optimization: VIN powers low-noise control circuitry, while VBAT supplies the high-current boost stage. This architecture supports both single-cell (VBAT = VIN) and two-cell (VBAT > VIN) Li-ion battery configurations, with C3 pre-regulator required only in the latter - as shown in Figures 1 and 2 of the datasheet.
What protection features are built into the TPS61166DSKT?
The TPS61166DSKT includes overvoltage protection (18 V on VO), overcurrent protection (1.1 A peak switch current), over-load protection (300 mA at OUT), undervoltage lockout (1.55 V on VIN), thermal shutdown (150°C), and ESD tolerance (2 kV HBM). All are documented in the Absolute Maximum Ratings, Recommended Operating Conditions, and Electrical Characteristics tables of SLVS991.
TPS61166DSKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN 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):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 1.1A (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (2.5x2.5)
TPS61166DSKT FAQ
1.How can I place an order for TPS61166DSKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61166DSKT 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 TPS61166DSKT reliable?
The price and inventory of TPS61166DSKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61166DSKT is usually 5 days.
3.What payment methods are accepted for TPS61166DSKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61166DSKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61166DSKT?
TPS61166DSKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61166DSKT 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 TPS61166DSKT?
For technical support, including TPS61166DSKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61166DSKT requirements.
6.How does Aetrix verify that TPS61166DSKT is sourced from the original manufacturer or authorized distributors?
All TPS61166DSKT 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 TPS61166DSKT meets industry standards.
7.What is the process for return or replacement of TPS61166DSKT?
All TPS61166DSKT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61166DSKT, 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 TPS61166DSKT part is unused and in its original packaging.
Return procedure for TPS61166DSKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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