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Texas Instruments TPS61061YZFT
- Part No.:
- TPS61061YZFT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS61061YZFT.pdf
- Description:
- IC LED DRV RGLTR PWM 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
TPS61061YZFT from Texas Instruments is a constant-current synchronous boost LED driver IC designed to power up to four white LEDs in series from a 2.7 V–6.0 V input supply. It integrates overvoltage protection (18 V min), short-circuit protection, and dual brightness control-digital via ILED pin (5-bit DAC, 15.6 mV/step) and PWM via EN pin (≤1 kHz). It delivers up to 400 mA switch current with 1 MHz fixed-frequency operation and operates in continuous conduction mode for low-noise LED lighting in space-constrained portable devices.
For engineers reviewing the TPS61061YZFT datasheet, TPS61061YZFT pinout, TPS61061YZFT application, or TPS61061YZFT equivalent, key selection considerations include its 18-V OVP threshold (distinguishing it from TPS61060/62), NanoFree™ 8-ball CSP package (1.446 mm × 1.446 mm), 250 mV/500 mV selectable feedback voltage, digital brightness programming timing (tup = 1–75 µs, tdown = 180–300 µs), and integrated 400-mA N-channel MOSFET switch.
Technical Context
The TPS61061YZFT implements peak-current-mode PWM control with a fixed 1 MHz switching frequency, internal loop compensation, and synchronous rectification using an integrated N-channel MOSFET switch and P-channel rectifier. Its current-mode architecture includes a slope compensation ramp to ensure stability at duty cycles >50%.
It features dual independent brightness interfaces: EN pin accepts PWM signals ≤1 kHz for analog dimming with 50 ms shutdown delay, while ILED pin enables digital control via 5-bit DAC (32 steps, 15.6 mV/step) that adjusts feedback reference from 250 mV to 500 mV-directly scaling LED current without processor intervention or continuous clocking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 6.0 V - supports single-cell Li-ion, Li-polymer, or triple-AA battery inputs without external regulation. |
| Output Overvoltage Protection | 18 V (min) - matches 4-white-LED string requirements (typ. 14–16 V forward), enabling use of low-voltage-rated 25-V output capacitors. |
| Feedback Voltage | Selectable: 250 mV (ILED = high) or 500 mV (ILED = GND) - lower setting improves efficiency by ~2% for low-LED-count strings. |
| Switch Current Limit | 325 mA (min) - sets maximum LED current capability when combined with external sense resistor (e.g., 12 Ω → ~42 mA max). |
| Switching Frequency | 1.0 MHz (±20%) - permits compact 22 µH inductor and 220 nF ceramic output capacitor, reducing board area and EMI filter complexity. |
| Digital Brightness Resolution | 5-bit DAC (32 steps, 15.6 mV/step) - enables precise, low-power LED current adjustment without PWM generation or GPIO toggling. |
| Shutdown Current | 1 µA (max) - minimizes battery drain during display off-state in handheld devices. |
Pinout & Package
TPS61061YZFT uses an 8-ball NanoFree™ wafer chip-scale package (YZF), measuring 1.446 mm × 1.446 mm with 0.5-mm ball pitch. The exposed die pad is not electrically connected (no thermal pad); all balls are signal or ground terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (B1) | Input power supply | Accepts 2.7–6.0 V; requires ≥1 µF ceramic input capacitor close to pin for stability and transient response. |
| EN (A2) | Enable/dimming control input | Pulled high to enable; internal 300-kΩ pulldown ensures safe default-off state; accepts PWM ≤1 kHz for analog brightness control. |
| GND (A1) | Analog ground reference | Primary return path for FB, ILED, and internal bias circuits; must be low-impedance and separated from PGND where possible. |
| PGND (C3) | Power ground return | High-current return for SW and OUT paths; connects directly to inductor and output capacitor ground to minimize noise coupling. |
| FB (B3) | Current-sense feedback input | Regulates LED current by sensing voltage across external Rs; reference set to 250 mV or 500 mV based on ILED logic level. |
| OUT (C1) | Boost converter output | Drives LED anode string; includes integrated 18-V overvoltage protection and short-circuit detection (precharge mode @ ~100 mA). |
| SW (C2) | Internal switch node | Connects to inductor; carries high di/dt switching current; requires tight layout with minimal trace length and solid ground plane. |
| ILED (A3) | Digital brightness control input | Configures DAC reference: grounded → 500 mV FB; high → 250 mV FB + 32-step programmable dimming via pulse-width timing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 400-mA N-channel MOSFET switch | Eliminates need for external high-side switch; supports up to 4-LED strings with typical 3.2-V forward voltage per LED. |
| 18-V minimum overvoltage protection | Matches TPS61061's 4-LED target (≈14–16 V), allowing cost-effective 25-V output capacitors instead of 35-V parts required for 5-LED variants. |
| Dual brightness interface (PWM + digital) | EN pin enables simple microcontroller PWM dimming; ILED pin allows ultra-low-power digital control-processor can sleep between step updates. |
| Synchronous rectification | Reduces conduction losses vs. Schottky diode solutions, improving efficiency by 5–10% at light loads and enabling smaller thermal design. |
| Start-up precharge current (100 mA typ) | Prevents LED turn-on surge; charges output capacitor to VIN – 0.3 V before full regulation, ensuring reliable ignition of high-Vf LED strings. |
Applications
| Smartphone Front Camera Flash | Ultra-Thin Tablet Display Backlight |
|---|---|
Use Scenario: Driving 4-series white LEDs for brief, high-intensity flash illumination in front-facing camera modules. IC Role / Device Role / Timing Role: Constant-current boost controller providing regulated 25–35 mA per LED with fast enable/disable (<50 ms shutdown delay) and PWM dimming synchronized to image capture timing. Use Value: 18-V OVP prevents damage during open-circuit LED failure; NanoFree™ package fits <0.5-mm board height constraints; 1-MHz switching avoids audible noise in audio-sensitive zones. |
Use Scenario: Powering edge-lit LCD backlight with 4-LED string in sub-6-mm tablet chassis where thermal and space budgets are extreme. IC Role / Device Role / Timing Role: High-efficiency current source delivering stable brightness across battery discharge (2.7–4.2 V), with digital dimming via ILED to eliminate MCU PWM overhead and extend sleep-mode battery life. Use Value: 250-mV feedback mode increases efficiency by ~2% versus 500-mV mode-critical for extending video playback time; 220-nF output capacitor reduces component height vs. larger ceramics. |
| Portable Medical Diagnostic Device Display | Industrial Handheld Scanner UI Indicator |
Use Scenario: Illuminating high-contrast monochrome LCD in battery-powered field diagnostic tools requiring consistent brightness across temperature (–40°C to +85°C). IC Role / Device Role / Timing Role: Precision current regulator maintaining ±3% LED current accuracy over input voltage and temperature; short-circuit protection isolates failed LED strings without system reset. Use Value: Integrated overvoltage and short-circuit protection meets IEC 60601 safety margins; 120.8°C/W junction-to-ambient thermal resistance enables passive cooling in sealed enclosures. |
Use Scenario: Driving status indicator LEDs (power, scan active, error) in ruggedized barcode scanners subject to vibration and wide ambient temperature swings. IC Role / Device Role / Timing Role: Robust LED driver with undervoltage lockout (1.65 V) preventing erratic behavior during brownout; digital brightness control adapts indicator intensity to ambient light without firmware changes. Use Value: Shutdown current <10 µA preserves battery during multi-week idle periods; 8-ball CSP withstands mechanical shock better than QFN packages in drop-prone environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61061DRB | Same electrical specs, but in 3 mm × 3 mm QFN-8 package with exposed thermal pad (PowerPAD™); RθJA = 47.6°C/W vs. 120.8°C/W for YZF. | Preferred for higher-power or thermally constrained designs needing PCB copper pour for heat dissipation. | Choose DRB for >30 mA average LED current or ambient >60°C; choose YZF for ultra-compact footprint and lowest assembly cost. |
| TPS61062YZFT | Identical package and pinout, but 22.2-V OVP threshold and supports up to 5 LEDs; feedback voltage range and digital dimming identical. | Required when driving 5-LED strings (e.g., larger displays); otherwise over-spec'd for 4-LED use cases. | Select YZFT variant only if final design may scale to 5 LEDs; TPS61061YZFT provides optimal OVP margin and BOM cost for fixed 4-LED systems. |
Compared with TPS61061DRB, the TPS61061YZFT trades thermal performance for minimal footprint-ideal for thin consumer devices-but requires careful layout for thermal management. Versus TPS61062YZFT, it offers tighter OVP matching and lower cost for 4-LED applications without sacrificing dimming flexibility or efficiency.
Availability
TPS61061YZFT is available at Aetrix Electronics and suitable for smartphone camera flash, ultra-thin tablet backlighting, and portable medical display applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS61061YZFT 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 precision analog ICs.
The TPS6106x family was developed specifically for space-constrained portable LED lighting, integrating protection, dimming, and power stage into ultra-small packages to replace discrete boost+driver solutions in smartphones, tablets, and handheld instruments.
FAQ
What is the overvoltage protection threshold of the TPS61061YZFT?
The TPS61061YZFT has a minimum overvoltage protection (OVP) threshold of 18 V, with typical and maximum values of 18.5 V and 19.8 V respectively. This OVP level is specifically calibrated for reliable operation with 4-series white LED strings (typically 14–16 V total forward voltage), preventing damage during open-circuit or thermal runaway conditions while enabling use of lower-cost 25-V output capacitors. The TPS61061YZFT's OVP is distinct from the 14-V (TPS61060) and 22.2-V (TPS61062) variants in the same family.
How does digital brightness control work on the TPS61061YZFT?
Digital brightness control on the TPS61061YZFT is implemented via the ILED pin using an internal 5-bit DAC that adjusts the feedback reference voltage from 250 mV to 500 mV in 15.6-mV steps. Pulling ILED high selects 250-mV mode (half current for same Rs); pulling it low disables digital control and defaults to 500-mV mode. To program intermediate steps, the ILED pin is pulsed low for 1–75 µs (increase) or 180–300 µs (decrease), with 1.5-µs high pulses between steps. This allows precise, low-power LED current adjustment without continuous MCU activity.
What package type and dimensions does the TPS61061YZFT use?
The TPS61061YZFT uses Texas Instruments' NanoFree™ 8-ball wafer chip-scale package (YZF), with nominal body dimensions of 1.446 mm × 1.446 mm and 0.5-mm ball pitch. Unlike the QFN-8 (DRB) variant, the YZF package has no exposed thermal pad-its die pad is non-functional and not connected to GND. This ultra-compact CSP enables placement in <1.0-mm board height applications such as slim smartphones and wearables, though thermal performance (RθJA = 120.8°C/W) requires careful PCB layout for heat dissipation.
Can the TPS61061YZFT drive more than four LEDs?
No-the TPS61061YZFT is rated and characterized to safely drive up to four white LEDs in series, corresponding to its 18-V minimum overvoltage protection threshold. Attempting to drive five LEDs (requiring ~17.5–20 V) risks triggering OVP prematurely or exceeding the 33-V absolute maximum switch voltage rating under fault conditions. For five-LED strings, TI specifies the TPS61062YZFT (22.2-V OVP). Using TPS61061YZFT beyond four LEDs compromises protection integrity and violates recommended operating conditions.
What is the maximum PWM frequency supported on the EN pin of the TPS61061YZFT?
The EN pin of the TPS61061YZFT supports PWM brightness control signals up to 1 kHz, as specified in the datasheet's "Features" and "Enable PWM Dimming" sections. Applying PWM above 1 kHz may cause inconsistent dimming or unintended shutdown due to the device's internal 50-ms enable-to-shutdown delay timer. For higher-frequency dimming, use the ILED pin's digital interface instead-its 5-bit DAC enables precise, glitch-free current control without PWM timing constraints or processor overhead.
TPS61061YZFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, DSBGA
- 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):
- 6V
- Voltage - Output:
- 18.5V
- Current - Output / Channel:
- 400mA (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA
TPS61061YZFT FAQ
1.How can I place an order for TPS61061YZFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61061YZFT 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 TPS61061YZFT reliable?
The price and inventory of TPS61061YZFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61061YZFT is usually 5 days.
3.What payment methods are accepted for TPS61061YZFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61061YZFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61061YZFT?
TPS61061YZFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61061YZFT 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 TPS61061YZFT?
For technical support, including TPS61061YZFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61061YZFT requirements.
6.How does Aetrix verify that TPS61061YZFT is sourced from the original manufacturer or authorized distributors?
All TPS61061YZFT 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 TPS61061YZFT meets industry standards.
7.What is the process for return or replacement of TPS61061YZFT?
All TPS61061YZFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61061YZFT, 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 TPS61061YZFT part is unused and in its original packaging.
Return procedure for TPS61061YZFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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