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Texas Instruments TPS61059DRCT
- Part No.:
- TPS61059DRCT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS61059DRCT.pdf
- Description:
- IC LED DRIVER RGLTR 800MA 10VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,377
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Product details
Overview
TPS61059DRCT from Texas Instruments is a synchronous boost DC-DC converter with integrated down-mode operation, designed specifically as a high-power white LED driver for single-cell Li-ion battery systems. It delivers up to 800 mA LED current from 2.7 V–5.5 V input, features 650 kHz fixed-frequency PWM control, 1500 mA switch current limit, 500 mV feedback reference, and LED disconnect during shutdown. It is used in smartphone camera flash modules requiring precise, high-current LED regulation.
For engineers reviewing the TPS61059DRCT datasheet, TPS61059DRCT pinout, TPS61059DRCT application, or TPS61059DRCT equivalent, key selection considerations include its 1500 mA peak switch current capability (vs. 1000 mA in TPS61058), 3 mm × 3 mm QFN-10 PowerPAD™ package, open/shorted LED protection, overtemperature shutdown at 140°C, and compatibility with external resistor-programmable dual-current modes (torch/movie-light/flash).
Technical Context
The TPS61059DRCT implements a fixed-frequency, multiple feedforward controller topology that monitors input voltage, output voltage, and NMOS switch voltage drop to directly adjust duty cycle-bypassing slow error-amplifier loop latency. Its synchronous rectification uses integrated N- and P-channel MOSFETs (rDS(on) = 260 mΩ SWN, 290 mΩ SWP) to achieve up to 80% system efficiency at 500 mA LED load.
It operates in two distinct modes: boost mode (when VIN < VOUT required for LED regulation) and down-conversion mode (when VIN ≥ VOUT), where the PMOS rectifier is actively biased to drop excess voltage-enabling stable LED drive across full Li-ion voltage range (3.0 V–4.2 V). Thermal shutdown (140°C, 20°C hysteresis) and output overvoltage protection (6.1 V typ) are built-in safety features.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports full discharge curve of single-cell Li-ion batteries without external LDO pre-regulation. |
| Switch Current Limit | 1500 mA (typ) - enables 800 mA continuous LED current with margin for transient peaks and thermal derating. |
| Oscillator Frequency | 650 kHz (typ) - balances EMI performance, inductor size (4.7 µH typical), and PCB layout constraints. |
| Feedback Reference Voltage | 500 mV (±2%) - sets LED current via external sense resistor (e.g., 1.5 Ω → 333 mA full-scale); enables accurate current programming. |
| Shutdown Current | 100 nA (typ) - minimizes battery drain during device idle state; critical for always-on mobile imaging subsystems. |
| Output Overvoltage Threshold | 6.1 V (typ) - protects internal 7 V-rated SW node and external LEDs from damage during open-circuit or fast dimming transitions. |
| Thermal Shutdown Threshold | 140°C (typ) - safeguards against thermal runaway under sustained high-current operation in compact phone modules. |
Pinout & Package
TPS61059DRCT is housed in a thermally enhanced 10-pin QFN package (DRC) measuring 3.0 mm × 3.0 mm × 0.8 mm with exposed PowerPAD™ thermal pad. The package requires soldering the PowerPAD™ to PGND for effective heat dissipation and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable input | Logic-level control: >1.4 V enables operation; internal 400 kΩ pull-down ensures safe default-off state when floating. |
| VOUT (Pin 2) | Regulated output | High-current output node connected to LED anode; must be decoupled with ≥22 µF low-ESR ceramic capacitor. |
| FB (Pin 3) | Current-sense feedback | Monitors voltage across external Rs to regulate LED current; referenced to 500 mV internal bandgap. |
| IOK (Pin 4) | Open-drain ready indicator | Pulled low after pre-charge completes; signals system controller that high-current LED drive is stable and safe to activate. |
| GND (Pins 5 & 7) | Control ground | Reference for all analog and logic circuitry; must be isolated from power ground except at single-point tie near Pin 5. |
| PVIN (Pin 6) | Main power input | Primary input path for battery voltage; connects directly to input bypass capacitor (≥10 µF) to minimize switching noise injection. |
| VIN (Pin 8) | Secondary input | Internally tied to PVIN; must be externally connected to same input rail to ensure proper biasing of internal circuits. |
| SW (Pin 9) | Switching node | Drives external boost inductor; carries high di/dt current; requires tight layout and Kelvin connection to minimize ringing. |
| PGND (Pin 10) | Power ground | Source connection for NMOS switch; carries high pulsed currents; must be solidly connected to PowerPAD™ and inductor ground. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification with dual MOSFETs | Replaces lossy Schottky diode; reduces conduction loss by >30% vs. asynchronous designs, enabling 80% efficiency at 500 mA. |
| Integrated down-conversion mode | Enables regulated LED drive even when battery voltage exceeds LED forward voltage-eliminates need for external buck-boost or linear regulators. |
| LED disconnect during shutdown | Active isolation prevents battery-to-LED leakage via backgate diode; eliminates need for external load switches in portable flash circuits. |
| Programmable dual-current operation | Supports torch (low-current), movie-light (mid-current), and flashlight (high-current) modes via nFLASH control signal and external resistor network. |
| Pre-charge and soft-start | 115 mA constant pre-charge current limits inrush; prevents LED turn-on surge and stabilizes startup before full regulation engages. |
Applications
| Smartphone Camera Flash | Tablet Imaging Module |
|---|---|
Use Scenario: High-intensity, short-duration illumination for still image capture in low-light conditions. IC Role / Device Role / Timing Role: Primary LED current regulator and power stage controller; manages 500–800 mA pulse current with <5 ms enable-to-full-output response. Use Value: Delivers consistent lumen output across battery voltage range (3.3 V–4.2 V) without brightness droop or color shift. |
Use Scenario: Dual-mode lighting for video recording (continuous) and photo capture (pulsed) in 7–10 inch tablets. IC Role / Device Role / Timing Role: Dual-current source supporting movie-light (150 mA) and flashlight (700 mA) via nFLASH logic control. Use Value: Eliminates need for separate torch and flash drivers; reduces BOM count and PCB area in space-constrained tablet bezels. |
| Portable Medical Endoscope Light | Industrial Handheld Scanner Illumination |
Use Scenario: Sterile, battery-powered endoscopic probe requiring flicker-free, thermally stable white light. IC Role / Device Role / Timing Role: Constant-current LED driver with overtemperature and open-LED fault protection; maintains ±3% current accuracy over temperature. Use Value: Prevents thermal damage to sensitive optics and ensures regulatory compliance for medical-grade illumination stability. |
Use Scenario: Rugged barcode scanner needing reliable LED flash under variable ambient temperatures and mechanical shock. IC Role / Device Role / Timing Role: Robust LED power controller with 1500 mA switch rating and 140°C thermal shutdown-tolerates extended high-current bursts. Use Value: Sustains >10,000 flash cycles without degradation; supports IP65-rated enclosures with minimal heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61058DRCT | 1000 mA switch current limit (vs. 1500 mA); identical pinout, package, and feature set. | Rated for ≤500 mA continuous LED current; unsuitable for 700–800 mA flashlight use cases. | Select TPS61058DRCT only when peak LED load is capped at 500 mA and thermal margin is sufficient. |
| RT9397BF | 600 kHz switching frequency; 1200 mA switch limit; no integrated down-mode; requires external OVP. | Lacks automatic VIN ≥ VOUT transition; needs additional protection components for Li-ion full-range operation. | Choose RT9397BF only if system design accepts higher component count and reduced functional integration. |
Compared with TPS61059DRCT, TPS61058DRCT offers lower current capability but identical footprint and control interface-making it a cost-optimized alternative for mid-tier devices. RT9397BF provides comparable efficiency but lacks down-mode and integrated protection, increasing design complexity for battery-powered flash systems.
Availability
TPS61059DRCT is available at Aetrix Electronics and suitable for smartphone camera flash modules, tablet imaging subsystems, portable medical endoscopes, and industrial handheld scanners requiring stable component supply and long-term production continuity.
Supply support for TPS61059DRCT 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 TPS6105x family was engineered specifically for high-brightness white LED driving in portable imaging systems-prioritizing small solution size (<80 mm²), battery-aware shutdown behavior, and robust fault protection for consumer electronics.
FAQ
What is the maximum continuous LED current supported by the TPS61059DRCT?
The TPS61059DRCT supports up to 800 mA continuous LED current when operated within its recommended conditions: input voltage ≥2.7 V, ambient temperature ≤85°C, and proper thermal management using the PowerPAD™. This is enabled by its 1500 mA peak switch current limit, which provides headroom for ripple and transients while maintaining regulation accuracy and thermal safety.
How does the TPS61059DRCT handle input voltages higher than the LED forward voltage?
The TPS61059DRCT automatically enters down-conversion mode when the input voltage reaches or exceeds the output voltage needed to sustain the programmed LED current. In this mode, the internal PMOS rectifier is actively biased to drop excess voltage-allowing stable current regulation without external components, unlike conventional boost-only drivers that fail or require additional circuitry above VF.
What is the role of the IOK pin on the TPS61059DRCT?
The IOK (Indicator OK) pin on the TPS61059DRCT is an open-drain output that pulls low once the device completes pre-charge and enters stable high-current regulation. It signals to the host processor that the LED driver is ready for flash activation-preventing premature triggering and ensuring consistent light output timing in camera systems using the TPS61059DRCT.
Does the TPS61059DRCT require external compensation components?
Yes-the TPS61059DRCT requires an external RC compensation network (typically R1 = 22 kΩ and C3 = 1 nF COG ceramic) connected between FB and GND to ensure loop stability. This network counteracts phase lag introduced by the output capacitor ESR and inductor, preventing oscillation during load transients and maintaining ≥45° phase margin across operating conditions.
Can the TPS61059DRCT be used without the nFLASH control signal?
Yes-the TPS61059DRCT can operate in single-current mode (e.g., torch-only) by omitting R4, R5, and R6 and configuring R2/R3 to set a fixed LED current. In this configuration, the nFLASH node is left unconnected or tied to a fixed bias, and IOK serves solely as a ready indicator-simplifying design for applications requiring only one illumination level.
TPS61059DRCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2.5V ~ 5.5V
- Current - Output / Channel:
- 800mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS61059DRCT FAQ
1.How can I place an order for TPS61059DRCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61059DRCT 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 TPS61059DRCT reliable?
The price and inventory of TPS61059DRCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61059DRCT is usually 5 days.
3.What payment methods are accepted for TPS61059DRCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61059DRCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61059DRCT?
TPS61059DRCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61059DRCT 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 TPS61059DRCT?
For technical support, including TPS61059DRCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61059DRCT requirements.
6.How does Aetrix verify that TPS61059DRCT is sourced from the original manufacturer or authorized distributors?
All TPS61059DRCT 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 TPS61059DRCT meets industry standards.
7.What is the process for return or replacement of TPS61059DRCT?
All TPS61059DRCT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61059DRCT, 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 TPS61059DRCT part is unused and in its original packaging.
Return procedure for TPS61059DRCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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