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Texas Instruments TPS61055YZGT
- Part No.:
- TPS61055YZGT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-UFBGA, DSBGA
- Datasheet:
-
TPS61055YZGT.pdf
- Description:
- IC LED DRVR RGLTR PWM 12DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,285
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Product details
Overview
TPS61055YZGT from Texas Instruments is a high-power white LED driver IC implementing a 2-MHz synchronous boost converter with integrated low-side current regulation, supporting torch (75 mA) and flash (500 mA) modes, 5.0-V voltage-regulated output, and zero-latency FLASH_SYNC control for camera synchronization.
For engineers reviewing the TPS61055YZGT datasheet, TPS61055YZGT pinout, TPS61055YZGT application, or TPS61055YZGT equivalent, this device is selected for compact, high-efficiency LED power management in battery-powered imaging systems requiring precise current control, thermal safety, and fast mode transitions without PCB layout changes.
Technical Context
The TPS61055YZGT uses a constant-frequency current-mode PWM control architecture operating at 2.0 MHz (±10%), enabling stable continuous-conduction mode with integrated NMOS switch and synchronous NMOS rectifier. It supports dual operational domains: regulated constant-current sink (250-mV LED sense voltage) and regulated constant-voltage boost (5.0 V ±3%).
Mode selection is implemented via two logic inputs (MODE0/MODE1), enabling shutdown (0.3 µA), torch-only, torch+flash, or voltage-regulation modes. Safety features include 820-ms flash timer, over-temperature shutdown (160°C), open/shorted LED protection, and undervoltage lockout (2.4 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 6.0 V - supports single-cell Li-ion (3.0–4.2 V) and Li-polymer batteries without external LDO pre-regulation. |
| LED Flash Current | 500 mA - factory-set maximum for flash mode (ILIM = 00), enabling high-brightness illumination with controlled thermal load. |
| Switching Frequency | 2.0 MHz (typ) - allows use of small 2.2-µH inductors and minimizes EMI filtering requirements in space-constrained layouts. |
| LED Sense Voltage | 250 mV - low dropout across internal current-sense resistor improves efficiency in boost and linear down-mode operation. |
| Shutdown Current | 0.3 µA (typ) - ultra-low quiescent draw preserves battery life during idle periods in portable imaging devices. |
| Thermal Shutdown | 160°C (typ) - protects against sustained overload; requires full shutdown cycle (MODE0=0, MODE1=0) to resume operation. |
| Output Overvoltage Protection | 6.0 V (typ) - clamps VOUT during LED open-circuit failure, preventing damage to downstream circuitry. |
Pinout & Package
Packaged in a 12-pin NanoFree™ wafer chip-scale package (CSP-12), footprint-optimized for minimal board area (<25 mm² total solution size) and thermal performance (θJA = 89°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Power Input | Primary input supply connection; must be decoupled directly with low-ESR capacitor to minimize ripple and ensure stable start-up. |
| VOUT | Boost Output | Regulated output node; supplies LED anode or external 5.0-V loads; connects to output capacitor and inductor. |
| LED | Current-Sense Feedback | Low-side current-sense input; regulates LED current by maintaining 250 mV across internal sense resistor. |
| FLASH_SYNC | Flash Trigger Input | Level-sensitive strobe: HIGH enables flash current (500 mA); LOW reverts to torch (75 mA); zero-latency transition. |
| MODE0 / MODE1 | Operating Mode Control | Two-bit logic interface defining shutdown, torch-only, torch+flash, or 5.0-V voltage-regulation mode. |
| SW | Switch Node | Drain of internal NMOS power switch; connects to inductor; high-impedance during shutdown. |
| PGND / AGND | Ground Returns | Separate power (PGND) and analog (AGND) grounds; must be joined under IC via PowerPAD™ for optimal noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LED Turn-On Safety Timer | 820-ms fixed duration limits flash exposure time, preventing thermal runaway and ensuring compliance with IEC 62471 photobiological safety limits. |
| Zero-Latency TX-Masking Input (Tx-TOFF) | Forces immediate transition from flash to torch current on rising edge, reducing peak battery current during RF transmission without affecting safety timer. |
| Low-Light Dimming Mode | 122-Hz PWM with 6.3% duty cycle enables usable torch-level illumination at ~6% average current (4.7 mA), extending battery runtime in low-light UI scenarios. |
| Open/Shorted LED Protection | Automatic fault response: short-circuit limits current to ILIM; open-circuit clamps VOUT at 6.0 V and disables switching to prevent overvoltage stress. |
| 2-MHz Synchronous Boost Topology | Eliminates external Schottky diode; achieves up to 96% peak efficiency with 2.2-µH inductor and reduces solution size vs. lower-frequency alternatives. |
Applications
| Camera Flash Control | Audio Amplifier Supply |
|---|---|
Use Scenario: Smartphone rear/front camera module requiring synchronized high-current LED flash pulses with sub-millisecond timing precision. IC Role / Device Role / Timing Role: Constant-current LED driver with FLASH_SYNC-triggered zero-latency mode switching and integrated 820-ms safety timer. Use Value: Enables compliant, repeatable flash illumination without software intervention or external timing circuitry. |
Use Scenario: Hands-free speakerphone amplifier needing stable 5.0-V rail from a 3.6-V Li-ion battery. IC Role / Device Role / Timing Role: Dual-mode boost regulator operating in voltage-regulation mode (MODE0=1, MODE1=1) with ±3% DC accuracy. Use Value: Eliminates need for separate buck-boost IC; delivers clean, regulated 5.0-V supply with <100-mV load transient deviation. |
| Torch Lighting Interface | Low-Power UI Indicator |
Use Scenario: Always-on status lighting in mobile devices where battery life and consistent brightness are critical. IC Role / Device Role / Timing Role: Precision 75-mA constant-current source with thermal foldback and LED disconnect during shutdown. Use Value: Maintains uniform luminance across temperature and battery voltage range while drawing only 8.5 mA quiescent current. |
Use Scenario: Sub-5-mA ambient-light-adjustable indicator LED in wearable or IoT edge devices. IC Role / Device Role / Timing Role: Low-light dimming mode (122 Hz, 6.3% duty cycle) activated via FLASH_SYNC HIGH in torch-only mode. Use Value: Delivers visible yet energy-efficient indication (~4.7 mA avg.) without requiring external PWM controller or MCU GPIO resources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61055DRC | QFN-10 package (θJA = 49°C/W); higher thermal conductivity but larger footprint (3×3 mm vs. CSP-12's 1.6×1.6 mm). | Preferred for thermally demanding, medium-volume production where PCB real estate is less constrained than height. | Select when thermal derating margin >1.5× required or when QFN reflow compatibility is prioritized over miniaturization. |
| TPS61054YZGT | Same CSP-12 package; supports higher flash current (700 mA) and current limit (1500 mA), with identical pinout and control logic. | Suitable for premium camera modules requiring brighter flash output without changing layout or firmware. | Choose when system-level flash brightness requirement exceeds 500 mA and thermal design accommodates higher ILIM. |
Compared with TPS61055DRC and TPS61054YZGT, the TPS61055YZGT provides the smallest form factor with optimized thermal resistance for ultra-thin mobile designs, while offering a balanced flash-current capability that avoids overdesigning the inductor and PCB copper for typical mid-tier smartphone use cases.
Availability
TPS61055YZGT is available at Aetrix Electronics and suitable for camera flash control, audio amplifier supply, torch lighting interface, and low-power UI indicator applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61055YZGT 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 company specializing in analog, embedded processing, and digital signal processing technologies, with leadership in power management innovation since 1930.
The TPS6105x product line was designed specifically for high-efficiency, space-constrained white LED driving in portable imaging systems-emphasizing integration, thermal robustness, and seamless camera interface synchronization.
FAQ
What is the maximum flash current supported by the TPS61055YZGT?
The TPS61055YZGT supports a factory-configured maximum flash current of 500 mA (ILIM = 00). This value is fixed per device variant and cannot be adjusted externally. The current is regulated via the internal 250-mV LED sense voltage and verified across –40°C to 85°C ambient temperature. Exceeding this current risks triggering overcurrent protection or thermal shutdown. For higher flash output, consider the TPS61054YZGT variant.
How does the FLASH_SYNC pin function in the TPS61055YZGT?
The FLASH_SYNC pin on the TPS61055YZGT is a level-sensitive input that switches the LED current between torch (75 mA) and flash (500 mA) modes with zero latency. When FLASH_SYNC is driven HIGH (≥1.2 V), the device enters flash mode; when pulled LOW (≤0.4 V), it reverts to torch mode. The internal 820-ms safety timer starts on the rising edge and stops on the falling edge or timeout-ensuring safe, controlled flash duration.
Can the TPS61055YZGT operate as a general-purpose boost regulator?
Yes, the TPS61055YZGT can operate as a 5.0-V regulated boost converter by setting MODE0 = 1 and MODE1 = 1. In this mode, it regulates VOUT to 5.0 V ±3% across 2.5–6.0 V input and up to 1000 mA load, with typical efficiency >85% at 3.6-V input. It retains all protections-including OVP (6.0 V), thermal shutdown, and UVLO-making it suitable for powering auxiliary rails like audio amplifiers or sensors.
What is the purpose of the Tx-TOFF pin on the TPS61055YZGT?
The Tx-TOFF pin on the TPS61055YZGT provides RF transmission masking: when driven HIGH, it forces immediate transition from flash (500 mA) to torch (75 mA) current to reduce peak battery load during cellular/Wi-Fi transmission. This occurs without resetting the safety timer or altering FLASH_SYNC state-enabling simultaneous camera operation and RF compliance in smartphones.
Does the TPS61055YZGT require external compensation components?
No, the TPS61055YZGT integrates full internal compensation for its current-mode PWM control loop. No external RC networks or compensation capacitors are needed. The device is optimized for stability with standard 2.2-µH inductors and 10-µF ceramic output capacitors, simplifying layout and reducing BOM count-critical for high-volume mobile designs where component count directly impacts assembly cost and yield.
TPS61055YZGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 5.5V
- Current - Output / Channel:
- 500mA (Flash)
- Frequency:
- 2MHz
- Dimming:
- PWM
- Applications:
- Camera Flash, Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DSBGA
TPS61055YZGT FAQ
1.How can I place an order for TPS61055YZGT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61055YZGT 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 TPS61055YZGT reliable?
The price and inventory of TPS61055YZGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61055YZGT is usually 5 days.
3.What payment methods are accepted for TPS61055YZGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61055YZGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61055YZGT?
TPS61055YZGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61055YZGT 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 TPS61055YZGT?
For technical support, including TPS61055YZGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61055YZGT requirements.
6.How does Aetrix verify that TPS61055YZGT is sourced from the original manufacturer or authorized distributors?
All TPS61055YZGT 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 TPS61055YZGT meets industry standards.
7.What is the process for return or replacement of TPS61055YZGT?
All TPS61055YZGT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61055YZGT, 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 TPS61055YZGT part is unused and in its original packaging.
Return procedure for TPS61055YZGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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