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Texas Instruments TPS61311YFFT
- Part No.:
- TPS61311YFFT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-UFBGA, DSBGA
- Datasheet:
-
TPS61311YFFT.pdf
- Description:
- IC LED DRV RGLTR PWM 20DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:925
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Product details
Overview
TPS61311YFFT 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 delivers regulated current (up to 950 mA on LED2, 400 mA on LED1/LED3), operates from 2.5 V to 5.5 V input, and features integrated temperature monitoring via NTC, open/short LED protection, and 2-MHz switching for compact 2.2-µH inductor use - deployed in smartphone camera modules for flash strobe and continuous video lighting.
For engineers reviewing the TPS61311YFFT datasheet, TPS61311YFFT pinout, TPS61311YFFT application, or TPS61311YFFT equivalent, key selection criteria include its dual-mode operation (flash/video), zero-latency STRB0/STRB1 control, I²C-compatible interface up to 3.4 Mbps, thermal safety timer, and DSBGA-20 package with 2.20 mm × 1.90 mm footprint for space-constrained mobile designs.
Technical Context
The TPS61311YFFT implements a synchronous boost converter topology with three independent current-sink channels (LED1, LED2, LED3) and one constant-current privacy indicator output (INDLED). Its control logic supports simultaneous flash strobe and video light modes via dedicated STRB0/STRB1 inputs, with Tx-MASK enabling instantaneous transition from flash to video mode to reduce battery peak load.
It integrates analog LED voltage feedback (400 mV sense threshold), programmable current regulation via I²C registers, LED temperature monitoring through TS pin (23.8 µA bias current), and automatic battery droop compensation. The device enters power-save mode at light loads to maintain up to 95% efficiency across 10 mA–950 mA output range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion/Li-poly battery operation without external LDO pre-regulation. |
| Max LED Current (LED2) | 950 mA - enables high-brightness flash for smartphone still-camera applications. |
| Max LED Current (LED1/LED3) | 400 mA each - sufficient for auxiliary flash or dual-LED video lighting configurations. |
| Switching Frequency | 2 MHz - allows use of low-profile 2.2-µH inductors, reducing solution size below 25 mm². |
| I²C Interface Speed | Up to 3.4 Mbps (high-speed mode) - enables rapid LED current reconfiguration during burst capture sequences. |
| Thermal Shutdown Threshold | 140°C to 160°C - protects against overheating during sustained video light operation in enclosed phone chassis. |
| Quiescent Current | 590 µA typical - minimizes standby power draw in always-on camera subsystems. |
Pinout & Package
TPS61311YFFT is housed in a 20-pin NanoFree™ DSBGA package (2.20 mm × 1.90 mm, 0.4-mm pitch), optimized for ultra-thin mobile PCBs with bottom-side solder connections and minimal board area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Boost converter output | Regulated voltage node supplying LED anodes; supports 3.825 V–5.7 V in voltage-regulation mode. |
| AVIN | Analog power input | Main supply input (2.5 V–5.5 V); must be bypassed with 10-µF ceramic capacitor near package. |
| SW | Switch node | Connection point for boost inductor; carries high-frequency switched current (2 MHz). |
| LED1 / LED2 / LED3 | LED cathode current sinks | Three independent current-regulated outputs; each regulates LED current via internal 400-mV sense reference. |
| PGND / AGND | Power / Analog ground | Separate ground paths minimize noise coupling between switching and analog circuits; connected under IC body. |
| SDA / SCL | I²C bidirectional data / clock | Supports standard/fast/high-speed modes; requires external pull-ups per 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 / mode select | STRB0 enables/disables all LED channels; STRB1 selects flash (LOW) or video light (HIGH) mode. |
| TS | Temperature sense input | Connects to 220-kΩ NTC thermistor; monitors LED junction temperature for thermal derating or shutdown. |
| INDLED | Privacy indicator current source | Constant-current sink (2.6–15.8 mA) for low-VF status LED; independent of main LED drivers. |
| 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 input | Pull-high triggers immediate transition from flash to video mode, reducing RF interference during transmission. |
Key Features
| Feature | Design Value |
|---|---|
| Dual operational mode (flash strobe + video light) | Enables single-chip support for both high-current burst flash and low-power continuous illumination, eliminating need for separate drivers. |
| Integrated LED safety timer | Prevents thermal damage by automatically disabling LED current after programmable timeout - critical for user-safety compliance in handheld devices. |
| Open/short LED fault detection | Real-time monitoring of LED string continuity and shorts prevents system-level failures and enables diagnostic reporting over I²C. |
| Smooth LED current ramp-up/down | Eliminates visible flicker and audible inductor noise during mode transitions, improving user experience in video recording. |
| Battery voltage droop monitoring | Automatically reduces LED current when input voltage sags under load, maintaining stable camera module operation during RF transmit events. |
Applications
| Smartphone Still-Camera Flash | Mobile Video Lighting |
|---|---|
|
Use Scenario: High-intensity, short-duration illumination for capturing still images in low-light conditions. IC Role / Device Role / Timing Role: Current-regulated flash driver delivering up to 950 mA to LED2 channel with sub-500 µs current settling time triggered by STRB0 rising edge. Use Value: Enables consistent exposure control and color accuracy without requiring external current-setting resistors or timing controllers. |
Use Scenario: Continuous, flicker-free illumination during HD/4K video capture on smartphones and action cameras. IC Role / Device Role / Timing Role: Regulated video light source operating in constant-current mode with Tx-MASK-triggered seamless transition from flash to video. Use Value: Maintains stable brightness across battery discharge cycle while minimizing RF interference during cellular/Wi-Fi transmission. |
| Privacy Indicator Lighting | Multi-LED Camera Module Support |
|
Use Scenario: Visual status indication of active camera or microphone use in privacy-sensitive consumer devices. IC Role / Device Role / Timing Role: Dedicated INDLED constant-current output driving low-forward-voltage indicator LED independently of main flash channels. Use Value: Provides hardware-enforced, tamper-resistant visual feedback without consuming MCU GPIO resources or firmware overhead. |
Use Scenario: Driving heterogeneous LED arrays (e.g., warm/cool white, RGB auxiliary) in advanced multi-camera smartphone systems. IC Role / Device Role / Timing Role: Three-channel current sink with independent I²C-programmable current levels and synchronized STRB0/STRB1 control. Use Value: Simplifies BOM and layout by consolidating up to three LED drivers and thermal monitoring into one 2.2×1.9 mm package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED flash driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61310YFFT | Lower input valley current limit (1750 mA vs. 2480 mA); identical pinout, package, and feature set. | Suitable for lower-power flash implementations where peak LED current ≤700 mA suffices. | Select TPS61310YFFT when system-level thermal budget or battery pulse capability limits maximum flash current. |
| LM3648YFFR | Single-channel 1.5-A flash driver; lacks video light mode, TS input, and INDLED output; uses 16-pin DSBGA. | Targeted at cost-sensitive single-LED flash-only applications without thermal monitoring or privacy indicator needs. | Choose LM3648YFFR only if design requires minimal feature set and does not need multi-LED coordination or thermal safety. |
Compared with TPS61311YFFT, TPS61310YFFT offers identical functionality at reduced current capability, while LM3648YFFR sacrifices multi-channel control and safety features for smaller footprint and lower cost - making TPS61311YFFT the optimal choice for full-featured triple-LED camera modules requiring robust thermal management and dual-mode operation.
Availability
TPS61311YFFT 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 for production programs.
Supply support for TPS61311YFFT 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 digital signal processing technologies, with decades of expertise in power management and interface solutions.
The TPS6131x product line was designed specifically for mobile camera subsystems, integrating flash strobe, video light, thermal safety, and I²C control into a single compact package to replace discrete multi-chip solutions.
FAQ
What is the maximum continuous LED current supported by TPS61311YFFT on the LED2 channel?
The TPS61311YFFT supports up to 950 mA of continuous LED current on the LED2 channel under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). This rating is validated per TI's electrical characteristics table and applies in video light mode with appropriate thermal management. The TPS61311YFFT achieves this using its 2480-mA typical input valley current limit and synchronous boost architecture.
Does TPS61311YFFT require external current-setting resistors for LED regulation?
No, the TPS61311YFFT performs fully integrated current regulation using internal 400-mV sense references and I²C-programmable current codes - no external resistors are needed for LED current setting. The TPS61311YFFT's current accuracy is specified at ±7.5% for LED2 currents above 250 mA, eliminating calibration drift and layout sensitivity associated with external resistor networks.
How does the TS pin on TPS61311YFFT enable LED temperature monitoring?
The TS pin on TPS61311YFFT sources a precise 23.8 µA bias current into an external 220-kΩ NTC thermistor connected to ground. As LED temperature rises, NTC resistance drops, lowering TS voltage - which the TPS61311YFFT compares internally to detect warning (44.5 kΩ) and hot (14.5 kΩ) thresholds. This enables real-time thermal derating or shutdown without MCU intervention.
Can TPS61311YFFT operate as a standard voltage regulator in addition to LED driving?
Yes, the TPS61311YFFT can operate in voltage-regulation mode with output range 3.825 V to 5.7 V, functioning as a synchronous boost converter for other system rails - such as audio amplifier supplies. In this mode, it maintains regulation while supporting up to 1250 mA output current, leveraging the same power stage used for LED driving but with different feedback configuration.
What is the purpose of the INDLED pin on TPS61311YFFT?
The INDLED pin on TPS61311YFFT provides a dedicated constant-current sink (2.6–15.8 mA) for driving a low-forward-voltage privacy indicator LED - independent of the main LED1/LED2/LED3 channels. This enables hardware-level visual feedback of camera/microphone activity without consuming MCU GPIOs or requiring additional driver circuitry, enhancing user trust and regulatory compliance.
TPS61311YFFT 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:
- 2MHz
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-DSBGA
TPS61311YFFT FAQ
1.How can I place an order for TPS61311YFFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61311YFFT 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 TPS61311YFFT reliable?
The price and inventory of TPS61311YFFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61311YFFT is usually 5 days.
3.What payment methods are accepted for TPS61311YFFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61311YFFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61311YFFT?
TPS61311YFFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61311YFFT 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 TPS61311YFFT?
For technical support, including TPS61311YFFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61311YFFT requirements.
6.How does Aetrix verify that TPS61311YFFT is sourced from the original manufacturer or authorized distributors?
All TPS61311YFFT 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 TPS61311YFFT meets industry standards.
7.What is the process for return or replacement of TPS61311YFFT?
All TPS61311YFFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61311YFFT, 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 TPS61311YFFT part is unused and in its original packaging.
Return procedure for TPS61311YFFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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