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Texas Instruments TPS61311YFFR
- Part No.:
- TPS61311YFFR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-UFBGA, DSBGA
- Datasheet:
-
TPS61311YFFR.pdf
- Description:
- IC LED DRV RGLTR PWM 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,057
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Product details
Overview
TPS61311YFFR from Texas Instruments is a 1.5-A synchronous boost LED flash and video light driver with I²C interface, supporting up to three white LEDs in parallel. It operates from 2.5 V to 5.5 V input, delivers regulated current up to 950 mA per channel (LED2), integrates LED temperature monitoring via NTC, and features zero-latency strobe control via STRB0/STRB1 for smartphone camera synchronization.
For engineers reviewing the TPS61311YFFR datasheet, TPS61311YFFR pinout, TPS61311YFFR application, or TPS61311YFFR equivalent, key selection criteria include its 20-pin DSBGA package, 2-MHz switching frequency, I²C-compatible interface up to 3.4 Mbps, integrated safety timer and open/short LED detection, and dual-mode operation (flash strobe + video light).
Technical Context
The TPS61311YFFR implements a synchronous boost converter topology with three independent current-sink channels (LED1, LED2, LED3) and one privacy indicator sink (INDLED), all regulated via internal 400-mV sense voltage. Its control logic supports dynamic mode switching between flash (high-current, time-limited) and video light (lower-current, continuous) using STRB0/STRB1 inputs and Tx-MASK for RF PA coordination.
It integrates analog functions including thermal sensing (TS pin with 23.8-µA bias), hardware reset (NRESET), power-good output (GPIO/PG), and I²C register-based configuration of current levels, safety timers, and overvoltage protection thresholds. The device enters 2-µA standby mode and uses power-save mode at light loads to maintain up to 95% efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion and Li-poly battery systems without external LDO pre-regulation. |
| Max LED Current (LED2) | 950 mA - enables high-brightness flash for smartphone still-camera applications with programmable digital code control. |
| Switching Frequency | 2 MHz - allows use of compact 2.2-µH inductors and reduces EMI filtering requirements in space-constrained mobile designs. |
| I²C Interface Speed | Up to 3.4 Mbps - supports high-speed configuration and real-time current adjustment during video recording or burst flash sequences. |
| Thermal Protection | 140°C shutdown with 20°C hysteresis - prevents thermal runaway during sustained video light operation or ambient temperature excursions. |
| Standby Current | 2 µA typical - minimizes battery drain when camera subsystem is idle, critical for always-on imaging features. |
| Package | 20-pin NanoFree™ DSBGA (2.20 mm × 1.90 mm) - ultra-small footprint suitable for thin smartphone camera modules. |
Pinout & Package
TPS61311YFFR is housed in a 20-pin NanoFree™ DSBGA (YFF) package measuring 2.20 mm × 1.90 mm, optimized for minimal PCB area and thermal performance in mobile camera modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Boost converter output | Regulated voltage node (3.8–5.7 V) supplying LED anodes; requires 10-µF output capacitor for stability. |
| AVIN | Analog input supply | Main power input (2.5–5.5 V); connects directly to 4.7-µF bypass capacitor near IC for low-noise operation. |
| SW | Switch node | Drain of internal high-side MOSFET; connects to inductor (2.2 µH) and Schottky diode cathode in boost path. |
| LED1 / LED2 / LED3 | Current-sink feedback inputs | Cathode return paths for three independent white LEDs; each regulates current via 400-mV internal reference. |
| PGND / AGND | Power and analog ground | Separate ground planes required; PGND handles high-switching-current return, AGND serves precision analog circuits. |
| SDA / SCL | I²C bidirectional data/clock | Supports standard/fast/high-speed modes; requires external pull-ups and proper bus capacitance ≤400 pF. |
| NRESET | Hardware reset input | Active-low asynchronous reset; forces shutdown and clears I²C registers when pulled low ≥10 µs. |
| STRB0 / STRB1 | Strobe enable and mode select | STRB0 enables/disables all LED channels; STRB1 selects flash (LOW) vs video light (HIGH) mode with watchdog disable. |
| TS | NTC temperature sense | Accepts 220-kΩ NTC resistor to ground; enables LED thermal derating and hot-shutdown protection. |
| INDLED | Privacy indicator sink | Constant-current sink (2.6–15.8 mA) for low-VF status LED; used for camera activity indication. |
| GPIO/PG | Configurable I/O or power-good | Default open-drain PG output signals VOUT regulation status; configurable as GPIO via I²C register. |
| Tx-MASK | RF PA synchronization | High-level assertion switches instantly from flash to video light mode, reducing peak battery current during TX bursts. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent LED current sinks | Enables simultaneous drive of main flash (LED2), auxiliary flash (LED1/LED3), and privacy indicator (INDLED) with separate digital control. |
| Integrated LED safety timer | Prevents thermal damage by automatically disabling flash current after programmable timeout, compliant with IEC 62471 photobiological safety limits. |
| Zero-latency strobe control | STRB0 input triggers sub-500-µs LED current ramp-up, eliminating shutter lag in high-speed camera capture sequences. |
| Automatic battery droop protection | Monitors AVIN voltage during flash pulses and reduces LED current if battery sags below safe threshold, preserving system stability. |
| Open/short LED fault detection | Real-time monitoring of LED string integrity; disables faulty channel and asserts fault flag via I²C register for host processor diagnostics. |
Applications
| Smartphone Still-Camera Flash | Mobile Video Lighting |
|---|---|
Use Scenario: High-intensity, short-duration illumination for capturing still images in low-light conditions on modern smartphones. IC Role / Device Role / Timing Role: Primary flash driver delivering up to 950 mA to LED2 channel with precise timing control via STRB0 and integrated safety timer. Use Value: Enables consistent, repeatable flash output while preventing thermal damage through automatic current derating and LED temperature monitoring. | Use Scenario: Continuous, lower-intensity lighting for video recording on handheld devices, requiring stable brightness and minimal battery impact. IC Role / Device Role / Timing Role: Regulated current source operating in video light mode (STRB1 = HIGH), with Tx-MASK input for instantaneous current reduction during RF transmission. Use Value: Maintains uniform illumination during video capture while avoiding interference with cellular/Wi-Fi transceivers via synchronized current modulation. |
| Camera Module Reference Design | Privacy Indicator System |
Use Scenario: OEM integration of compact, high-efficiency LED driver into camera module reference boards for rapid prototyping and qualification. IC Role / Device Role / Timing Role: Integrated solution combining boost converter, triple current sinks, I²C interface, and thermal management in a 2.2 × 1.9 mm DSBGA package. Use Value: Reduces BOM count and layout complexity versus discrete boost + current-source solutions, accelerating time-to-market for camera subsystems. | Use Scenario: Visual indication of active camera operation in privacy-sensitive environments (e.g., laptops, tablets, smart displays). IC Role / Device Role / Timing Role: Dedicated INDLED constant-current sink driving low-forward-voltage status LED with programmable brightness (2.6–15.8 mA). Use Value: Provides user-transparent camera activity feedback without requiring additional driver ICs or GPIO resources from the host processor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61310YFFR | Lower input valley current limit (1750 mA vs 2480 mA); identical pinout, register map, and feature set. | Suitable for lower-power flash implementations where peak LED current ≤700 mA is sufficient. | Select TPS61310YFFR when system-level thermal budget or battery capacity constraints favor reduced maximum flash intensity. |
| RT8546GQW | Single-channel 1.5-A flash driver with I²C interface; lacks triple-sink architecture, TS input, and Tx-MASK functionality. | Requires external circuitry to support multi-LED configurations or thermal monitoring, increasing design complexity. | Choose RT8546GQW only for cost-sensitive, single-LED applications where full TPS61311YFFR feature set is unnecessary. |
Compared with TPS61311YFFR, TPS61310YFFR offers identical integration and software compatibility but lower peak current capability, while RT8546GQW sacrifices multi-LED flexibility and system-level safety features for lower unit cost in simplified designs.
Availability
TPS61311YFFR is available at Aetrix Electronics and suitable for smartphone camera modules, mobile video lighting systems, and privacy-indicator subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61311YFFR 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 mobile power solutions.
The TPS6131x product line was designed specifically for high-efficiency, space-constrained LED flash and video lighting in smartphones and portable imaging devices, integrating protection, control, and thermal intelligence into a single chip.
FAQ
What is the maximum LED current supported by TPS61311YFFR on the LED2 channel?
The TPS61311YFFR supports up to 950 mA on the LED2 channel under typical conditions, as confirmed by electrical characteristics tables and settling time test data. This peak current is programmable via I²C register settings and subject to thermal derating based on junction temperature and NTC feedback. The TPS61311YFFR achieves this with ±7.5% accuracy across 250–800 mA at TJ = 85°C.
How does the TPS61311YFFR handle thermal protection for LED strings?
The TPS61311YFFR monitors LED temperature via the TS pin using an external 220-kΩ NTC thermistor. It provides two warning thresholds: LEDWARN (39–50 kΩ ≈ 70°C) and LEDHOT (12.5–16.5 kΩ ≈ 55°C), triggering automatic current reduction or shutdown. Thermal shutdown activates at 140–160°C with 20°C hysteresis, ensuring robust protection during sustained video light operation.
Can TPS61311YFFR operate as a standard voltage regulator in addition to LED driving?
Yes, the TPS61311YFFR operates in voltage regulation mode with output range 3.825 V to 5.7 V, functioning as a synchronous boost converter for non-LED loads such as audio amplifiers or sensors. In this mode, it maintains regulation with ±2% internal feedback accuracy and supports power-save operation down to light loads, achieving up to 95% efficiency as verified in typical characteristic curves.
What is the purpose of the Tx-MASK input on the TPS61311YFFR?
The Tx-MASK input on the TPS61311YFFR enables real-time coordination with cellular or Wi-Fi transceivers: pulling Tx-MASK HIGH instantly transitions the device from flash mode to video light mode, reducing peak LED current loading on the battery during RF transmission bursts. This prevents voltage droop that could disrupt wireless communication, and is validated in timing specifications with 20-µs settling time.
Does the TPS61311YFFR support I²C communication at high speed, and what are the timing requirements?
Yes, the TPS61311YFFR supports I²C high-speed mode up to 3.4 Mbps for both read and write operations with ≤100 pF bus capacitance. Key timing parameters include tHIGH ≤60 ns, tLOW ≤160 ns, and trCL ≤40 ns. These values are specified in Section 7.6 of the datasheet and validated across –40°C to 125°C junction temperature, enabling fast configuration updates during dynamic camera operation.
TPS61311YFFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2.5V ~ 5.7V
- Current - Output / Channel:
- 1.5A (Flash)
- Frequency:
- 1.92MHz
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA
TPS61311YFFR FAQ
1.How can I place an order for TPS61311YFFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61311YFFR 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 TPS61311YFFR reliable?
The price and inventory of TPS61311YFFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61311YFFR is usually 5 days.
3.What payment methods are accepted for TPS61311YFFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61311YFFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61311YFFR?
TPS61311YFFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61311YFFR 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 TPS61311YFFR?
For technical support, including TPS61311YFFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61311YFFR requirements.
6.How does Aetrix verify that TPS61311YFFR is sourced from the original manufacturer or authorized distributors?
All TPS61311YFFR 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 TPS61311YFFR meets industry standards.
7.What is the process for return or replacement of TPS61311YFFR?
All TPS61311YFFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61311YFFR, 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 TPS61311YFFR part is unused and in its original packaging.
Return procedure for TPS61311YFFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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