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Texas Instruments TPS61055DRCR
- Part No.:
- TPS61055DRCR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61055DRCR.pdf
- Description:
- IC LED DRIVER RGLTR DIM 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:53,232
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Product details
Overview
TPS61055DRCR from Texas Instruments is a high-power white LED driver IC implementing a 2-MHz synchronous boost converter with integrated low-side current sink, delivering up to 500 mA flash current and 75 mA torch current in a 10-pin VSON (3.0 mm × 3.0 mm) package. It operates in four logic-controlled modes - shutdown, torch-only, torch+flash, and 5.0 V voltage regulation - and features 250 mV LED sense voltage, 0.3 μA shutdown current, and integrated safety timer for camera flash applications.
For engineers reviewing the TPS61055DRCR datasheet, TPS61055DRCR pinout, TPS61055DRCR application, or TPS61055DRCR equivalent, key selection criteria include verified flash/torch current capability (500/75 mA), 2-MHz switching frequency enabling compact 2.2-μH inductor use, zero-latency Tx-TOFF blanking, open/shorted LED protection, and compatibility with Li-ion battery-powered mobile imaging systems requiring stable current regulation and fast mode transitions.
Technical Context
The TPS61055DRCR uses constant-frequency current-mode PWM control with internal NMOS power switch and synchronous NMOS rectifier, operating exclusively in continuous conduction mode (CCM) for low-noise performance. Its dual-path architecture supports both LED current regulation (via 250 mV feedback at LED pin) and 5.0 V voltage regulation (via MODE0/MODE1 = 11), with independent control of torch/flash levels through FLASH_SYNC and Tx-TOFF inputs.
Functional mode selection is determined by two logic inputs (MODE0/MODE1), while flash timing is governed by an internal 820 ms safety timer triggered on FLASH_SYNC rising edge. The device integrates undervoltage lockout (2.4 V typical), thermal shutdown (160°C), overvoltage protection (6.0 V), and low-light dimming via 122-Hz, 6.3% duty-cycle PWM in torch-only mode with FLASH_SYNC = HIGH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Current | 500 mA - fixed maximum output current in flash mode (ILIM = 00), enabling reliable single-white-LED strobe operation without external current-setting resistors. |
| Torch Current | 75 mA - precise regulated LED current in steady-state illumination mode, supporting low-power preview or video lighting. |
| Switching Frequency | 2.0 MHz ±0.2 MHz - enables use of small 2.2-μH inductors and reduces input/output ripple, minimizing solution footprint to <25 mm². |
| LED Sense Voltage | 250 mV - low dropout across internal current-sense path, directly improving power efficiency by reducing wasted headroom in LED drive path. |
| Shutdown Current | 0.3 μA (typical) - ultra-low quiescent draw in MODE0=0/MODE1=0 state, preserving battery life during idle periods in portable devices. |
| Output Regulation | 5.0 V ±3% - stable voltage mode operation when configured as boost regulator, suitable for powering audio amplifiers or other system rails. |
| Safety Timer Duration | 820 ms - hardware-limited flash pulse duration preventing thermal damage to LED or PCB, initiated on FLASH_SYNC rising edge. |
Pinout & Package
TPS61055DRCR is housed in a thermally enhanced 10-pin VSON package (3.0 mm × 3.0 mm, 0.5 mm pitch) with exposed thermal pad internally connected to PGND. Pin 1 is located at bottom-left corner (marking dot adjacent), and pin numbering follows standard counter-clockwise sequence from pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Input Power Supply | Main input voltage connection (2.5–6 V); must be decoupled with ≥10 μF ceramic capacitor close to pin. |
| VOUT | Boost Output | Regulated output node; connects to LED anode or system rail; requires ≥3 μF output capacitance. |
| SW | Power Switch Node | Drain of internal NMOS switch; connects to inductor switch node; high-impedance during shutdown. |
| LED | Current-Sense Feedback | Low-side current-sense input; regulates LED current by maintaining 250 mV across internal sense resistor; connects to LED cathode. |
| FLASH_SYNC | Flash Trigger Input | Level-sensitive strobe: HIGH → flash mode (500 mA), LOW → torch mode (75 mA); initiates 820 ms safety timer on rising edge. |
| MODE0 / MODE1 | Mode Selection Inputs | Two-bit logic interface defining operational state: 00=shutdown, 10=torch-only, 01=torch+flash, 11=voltage-regulation (5.0 V). |
| Tx-TOFF | RF Blanking Input | Zero-latency flash-to-torch override: HIGH forces immediate reduction to torch current, independent of safety timer or FLASH_SYNC state. |
| PGND / AGND | Ground Terminals | PGND (pins 7, C1/C2) carries high-current return path; AGND (pin 4, D1) is analog reference ground; both must be connected to common ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Four Logic-Controlled Operating Modes | Enables single-chip support for camera preview (torch), capture (flash), system power (5 V boost), and zero-power standby - eliminating need for discrete mode-switching circuitry. |
| Integrated Flash Safety Timer | Hardware-enforced 820 ms maximum flash duration prevents LED overheating and ensures compliance with IEC 62471 photobiological safety limits. |
| Zero-Latency Tx-TOFF Blanking | Reduces LED current from flash to torch level within 20 μs upon RF PA activation, avoiding battery sag and interference with cellular transmission. |
| 250-mV LED Sense Voltage | Minimizes power loss in current-sense path, achieving up to 96% peak efficiency in boost mode and enabling higher brightness per watt in space-constrained designs. |
| Open/Shorted LED Protection | Automatically limits output current during short-circuit faults and clamps VOUT to 6.0 V during open-circuit conditions, protecting downstream components and ensuring system robustness. |
Applications
| Camera Flash Control | Mobile Audio Power Supply |
|---|---|
|
Use Scenario: Smartphone rear/front camera module requiring synchronized, high-intensity flash pulses with automatic duration limiting and RF-blanking capability. IC Role / Device Role: Primary LED current driver and flash timing controller, interfacing directly with camera ISP and baseband processor GPIOs. Use Value: Eliminates external flash timing IC and discrete MOSFET switches; achieves <1.2 ms startup and 20 μs Tx-TOFF response, meeting MIPI Camera Serial Interface (CSI-2) timing requirements. |
Use Scenario: Boosting Li-ion battery voltage (3.3–4.2 V) to 5.0 V for Class-D audio amplifier in smartphone or wireless earbud. IC Role / Device Role: Dual-function voltage regulator and LED driver - supplies clean 5 V rail while sharing same inductor and control logic with flash subsystem. Use Value: Reduces BOM count by consolidating two power functions; maintains >85% efficiency at 500 mA load, minimizing thermal impact near sensitive audio circuitry. |
| Low-Light Video Illumination | LED Failure-Safe Lighting |
|
Use Scenario: Continuous low-brightness LED illumination for video conferencing or night-vision assist in handheld devices. IC Role / Device Role: Precision current source with programmable dimming, using internal 122-Hz PWM at 6.3% duty cycle for flicker-free 75 mA average output. Use Value: Delivers consistent, eye-comfortable illumination without external PWM generator or microcontroller intervention; supports always-on preview mode with <10 μA added quiescent load. |
Use Scenario: White LED lighting in industrial handheld scanner or medical diagnostic tool where reliability under fault conditions is critical. IC Role / Device Role: Fault-tolerant LED driver with autonomous open-circuit voltage clamp (6.0 V) and short-circuit current limit (1000 mA), independent of host MCU supervision. Use Value: Prevents catastrophic failure during LED wire break or solder joint fracture; maintains safe operating voltage and avoids uncontrolled VOUT rise that could damage camera sensor or display drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61054DRCR | Higher flash current rating (700 mA vs. 500 mA); identical torch current (75 mA), safety timer (820 ms), and pinout. | Preferred for high-lumen flash applications requiring greater peak intensity; not suitable where lower flash current reduces thermal stress or extends battery life. | Select TPS61054DRCR only if system design mandates ≥700 mA flash drive; otherwise TPS61055DRCR offers better thermal margin and longer flash duration headroom. |
| RT8532DGQW | Fixed 500 mA flash current, but lacks voltage-regulation mode, Tx-TOFF blanking, and low-light PWM dimming; uses external current-sense resistor. | Applicable only for basic flash-only systems without torch mode, RF coordination, or auxiliary rail generation; requires additional passive components. | Choose RT8532DGQW only in cost-sensitive, single-function flash designs where feature set reduction is acceptable and layout area is unconstrained. |
Compared with TPS61054DRCR, TPS61055DRCR trades peak flash current for improved thermal management and extended battery runtime; compared with RT8532DGQW, it delivers full multimode functionality, integrated sensing, and smaller total solution size - making it optimal for modern dual-role (flash + torch + rail) mobile imaging platforms.
Availability
TPS61055DRCR is available at Aetrix Electronics and suitable for camera flash control, mobile audio power supply, low-light video illumination, and LED failure-safe lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing for consumer electronics OEMs.
Supply support for TPS61055DRCR 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and digital signal processing technologies for industrial, automotive, and personal electronics markets.
The TPS6105x product line was designed specifically for high-efficiency, space-constrained white LED driving in battery-powered mobile imaging systems - integrating flash timing, RF blanking, and multimode regulation into a single compact IC to replace discrete solutions.
FAQ
What is the maximum flash current supported by the TPS61055DRCR?
The TPS61055DRCR supports a maximum flash current of 500 mA, as defined by its internal current limit setting ILIM = 00. This value is factory-trimmed and guaranteed across –40°C to 85°C ambient temperature. Unlike adjustable-current drivers, the TPS61055DRCR does not require external resistors to set this level - the 500 mA is fixed and optimized for thermal performance and LED lifetime in smartphone flash applications. The TPS61055DRCR achieves this while maintaining ≤250 mV LED sense voltage and 820 ms safety timer enforcement.
How does the TPS61055DRCR handle RF interference during cellular transmission?
The TPS61055DRCR uses its dedicated Tx-TOFF pin to provide zero-latency flash-to-torch current reduction - forcing immediate transition from 500 mA flash to 75 mA torch level within 20 μs when an RF PA active signal is asserted. This prevents large transient current draw from coinciding with TX bursts, minimizing battery voltage sag and conducted EMI. The TPS61055DRCR continues normal operation of its safety timer and FLASH_SYNC logic independently, ensuring flash readiness is preserved after RF event completion.
Can the TPS61055DRCR operate as a general-purpose boost regulator?
Yes, the TPS61055DRCR can operate as a 5.0 V voltage-regulated boost converter when MODE0 and MODE1 are both driven HIGH (11). In this mode, it regulates VOUT to 5.0 V ±3% across 0–1000 mA load, with typical efficiency >85% at 500 mA. It retains all protections - overvoltage (6.0 V clamp), thermal shutdown, and undervoltage lockout - making it suitable for powering audio amplifiers or other system rails. However, unlike dedicated voltage regulators, its primary design focus remains LED current accuracy and flash timing integrity.
What protection features are built into the TPS61055DRCR?
The TPS61055DRCR integrates open-circuit protection (VOUT clamped to 6.0 V), short-circuit current limiting (1000 mA), thermal shutdown (160°C typical), undervoltage lockout (2.4 V), and overvoltage protection (6.25 V). During LED open-circuit fault, the control loop disables current regulation and activates voltage regulation to prevent runaway VOUT rise. All protections operate autonomously without MCU intervention, and status is indicated only through VOUT behavior - no fault flag pins are provided on the TPS61055DRCR.
Is the TPS61055DRCR pin-compatible with other devices in the TPS6105x family?
Yes, the TPS61055DRCR shares identical 10-pin VSON (DRC) package, pinout, and footprint with the TPS61054DRCR. Both devices have matching AVIN, VOUT, SW, LED, MODE0, MODE1, FLASH_SYNC, Tx-TOFF, PGND, and AGND connections, enabling direct substitution in existing layouts. Functional differences - such as flash current (500 mA vs. 700 mA) and current-limit code (ILIM = 00 vs. 01) - are internal and do not affect board-level compatibility. No PCB changes are required when upgrading or downgrading between these two variants.
TPS61055DRCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Bulk
- 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:
- 10-VSON (3x3)
TPS61055DRCR FAQ
1.How can I place an order for TPS61055DRCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61055DRCR 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 TPS61055DRCR reliable?
The price and inventory of TPS61055DRCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61055DRCR is usually 5 days.
3.What payment methods are accepted for TPS61055DRCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61055DRCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61055DRCR?
TPS61055DRCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61055DRCR 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 TPS61055DRCR?
For technical support, including TPS61055DRCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61055DRCR requirements.
6.How does Aetrix verify that TPS61055DRCR is sourced from the original manufacturer or authorized distributors?
All TPS61055DRCR 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 TPS61055DRCR meets industry standards.
7.What is the process for return or replacement of TPS61055DRCR?
All TPS61055DRCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61055DRCR, 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 TPS61055DRCR part is unused and in its original packaging.
Return procedure for TPS61055DRCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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