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Texas Instruments TPS61062DRBR
- Part No.:
- TPS61062DRBR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS61062DRBR.pdf
- Description:
- IC LED DRVR RGLTR PWM 400MA 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,974
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Product details
Overview
TPS61062DRBR from Texas Instruments is a constant-current, synchronous boost LED driver IC designed to power up to five white LEDs in series. It operates from 2.7 V to 6 V input, delivers regulated current via external sense resistor (RS = 12 Ω), features 1-MHz fixed-frequency PWM control, integrated overvoltage protection (22.2 V min), and supports dual brightness control modes-digital (ILED pin) and PWM (EN pin)-for portable backlighting applications.
For engineers reviewing the TPS61062DRBR datasheet, TPS61062DRBR pinout, TPS61062DRBR application, or TPS61062DRBR equivalent, key selection considerations include its 22.2-V OVP threshold (specific to TPS61062), 5-bit digital brightness control with 15.6-mV/step resolution, 400-mA internal N-channel MOSFET switch, thermal shutdown at ~160°C, and QFN-8 package compatibility with compact handheld PCB layouts.
Technical Context
The TPS61062DRBR implements peak-current-mode PWM control with a fixed 1-MHz switching frequency, synchronous rectification using integrated N-channel (0.6–0.9 Ω @ 3.6 V) and P-channel (2.5–3.7 Ω) MOSFETs, and continuous conduction mode operation for low-noise LED current regulation. Its error amplifier regulates feedback voltage (VFB) to either 250 mV or 500 mV depending on ILED pin state, enabling efficiency optimization across varying LED string voltages.
Short-circuit protection activates precharge current limiting (~100 mA) when OUT is shorted to GND, while overvoltage protection halts switching when output exceeds 22.2 V (min), resuming only after voltage falls below hysteresis threshold (0.7 V). Undervoltage lockout disables operation below 1.65 V, and thermal shutdown engages at ~160°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 6.0 V - supports single-cell Li-ion (3.0–4.2 V) and dual-cell alkaline/NiMH (2.7–4.8 V) battery inputs without external regulators. |
| Output Overvoltage Threshold | 22.2 V (min) - matches five-white-LED string (5 × 3.2 V ≈ 16 V) with margin; enables use of low-voltage-rated (e.g., 25-V) ceramic output capacitors. |
| Feedback Regulation Voltage | 250 mV (ILED = high) or 500 mV (ILED = GND) - lower VFB reduces power loss in sense resistor, improving efficiency by ~2% for low-VF LED strings. |
| Switching Frequency | 1.0 MHz (±20%) - allows compact 22-µH inductor and 220-nF ceramic output capacitor, minimizing board area and easing EMI filtering. |
| Digital Brightness Control | 5-bit DAC (32 steps), 15.6 mV/step - enables precise, processor-efficient LED current adjustment without continuous PWM generation. |
| Internal Power Switch | N-channel MOSFET, 400 mA current limit (min) - sustains full LED drive current (e.g., 20 mA × 5 LEDs) with headroom for transient loads and temperature variation. |
| Efficiency | Up to 80% - measured at 3.6 V input, 20 mA LED current, 5-LED string, with 22-µH inductor and 220-nF output capacitor. |
Pinout & Package
TPS61062DRBR uses an 8-pin 3.0 mm × 3.0 mm QFN package (DRB) with exposed thermal pad (PowerPAD™) that must be soldered to analog ground for thermal performance and noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 8) | Input supply | Accepts 2.7–6 V DC; requires 1-µF ceramic input capacitor close to pin for stability and transient response. |
| EN (Pin 2) | Enable / PWM dimming input | Pulled low by 300-kΩ internal resistor; apply PWM ≤1 kHz for analog brightness control; ≥50 ms low pulse forces shutdown. |
| GND (Pin 1) | Analog ground reference | Reference for FB, ILED, EN; must be low-impedance connection separate from PGND for noise immunity. |
| SW (Pin 6) | Switch node | Connects to inductor and diode-free synchronous rectifier; high dv/dt node requiring tight layout and ground shielding. |
| FB (Pin 4) | Current-sense feedback | Regulates voltage across RS to 250 mV or 500 mV; connects directly to RS–GND junction for accurate current sensing. |
| OUT (Pin 7) | Boost output | Drives LED anodes in series configuration; connects to cathode of last LED and output capacitor (220 nF minimum). |
| ILED (Pin 3) | Digital brightness control | Logic-level input: GND disables digital control (VFB = 500 mV); high enables 5-bit DAC (VFB = 250 mV baseline, adjustable). |
| PGND (Pin 5) | Power ground return | High-current return path for SW and OUT; must connect to VIN capacitor ground and thermal pad, separate from analog GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated short-circuit protection | Limits output current to ~100 mA during OUT-to-GND fault, preventing inductor saturation and thermal runaway without external circuitry. |
| Programmable overvoltage protection | Fixed 22.2-V (min) OVP threshold specific to TPS61062 - eliminates need for external OVP comparators in 5-LED designs. |
| Dual brightness control interface | Simultaneous support for hardware PWM (EN pin) and digital step control (ILED pin) - enables flexible system-level dimming architecture. |
| Synchronous rectification | Integrated P-channel rectifier replaces external Schottky diode, reducing conduction losses and improving efficiency by ~5% vs. asynchronous designs. |
| Thermal shutdown with hysteresis | Activates at ~160°C junction temperature and resets at ~145°C - protects device during sustained overload or poor heatsinking conditions. |
Applications
| Smartphone Backlighting | Digital Camera Flash Driver |
|---|---|
|
Use Scenario: Driving five-series white LEDs for main display backlight in space-constrained smartphone PCBs with single Li-ion battery supply. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED current to 15–20 mA per string, synchronized to 1-MHz clock for predictable EMI profile. Use Value: 22.2-V OVP ensures safe operation with 5-LED forward voltage (~16 V), while 250-mV VFB mode improves efficiency by reducing sense resistor power loss. |
Use Scenario: Providing high-current pulsed drive (up to 400 mA peak) for xenon or high-brightness LED flash in compact digital still cameras. IC Role / Device Role / Timing Role: Fast-response current source delivering controlled flash duration via EN pin PWM, with short-circuit protection preventing damage during accidental LED short. Use Value: Precharge current limiting (~100 mA) and thermal shutdown prevent inductor overheating during repeated flash cycles, extending component lifetime. |
| Portable Media Player UI Lighting | Industrial Handheld Scanner Display |
|
Use Scenario: Uniform backlighting for OLED or LCD status indicators and navigation keys in battery-powered media players operating across –40°C to 85°C ambient. IC Role / Device Role / Timing Role: Precision current regulator maintaining consistent LED brightness despite battery voltage sag from 4.2 V to 2.7 V, using digital ILED control for low-power sleep-mode dimming. Use Value: 5-bit DAC enables 32-step brightness adjustment without MCU PWM overhead, reducing system power consumption and firmware complexity. |
Use Scenario: Reliable LED backlight for ruggedized industrial scanner displays exposed to vibration, temperature cycling, and ESD events in warehouse environments. IC Role / Device Role / Timing Role: Robust LED driver with ±4000-V HBM ESD rating, undervoltage lockout (1.65 V), and integrated OVP/short-circuit protection ensuring uninterrupted operation during power transients. Use Value: QFN-8 package with PowerPAD™ provides superior thermal performance under continuous operation, maintaining <125°C junction temperature at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61062YZF | Same electrical specs, but in 1.446 mm × 1.446 mm NanoFree™ (DSBGA-8) package - 60% smaller footprint, no exposed thermal pad. | Preferred for ultra-compact designs where board area is critical; requires microvia-in-pad assembly and tighter solder mask definition. | Select YZF for minimal PCB real estate; DRBR for easier thermal management and standard reflow compatibility. |
| TPS61061DRBR | Identical QFN-8 package and pinout, but 18-V (min) OVP threshold and rated for up to four LEDs - lower maximum output voltage capability. | Suitable for 4-LED strings (e.g., 4 × 3.2 V = 12.8 V) with reduced OVP margin; not safe for 5-LED configurations above 18 V. | Choose TPS61061DRBR only if driving ≤4 LEDs and cost sensitivity outweighs OVP safety margin requirements. |
Compared with TPS61062YZF, the TPS61062DRBR offers superior thermal dissipation via PowerPAD™ and simplified assembly, while TPS61061DRBR provides pin-compatible substitution only for lower-string-count applications - neither is a drop-in replacement without verifying OVP and thermal design margins.
Availability
TPS61062DRBR is available at Aetrix Electronics and suitable for smartphone backlighting, digital camera flash drivers, portable media player UI lighting, and industrial handheld scanner displays requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS61062DRBR 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 LED driver innovation.
The TPS6106x product line was designed specifically for space-constrained, battery-powered portable devices requiring high-efficiency, digitally controllable constant-current LED drivers with integrated protection - targeting smartphones, PDAs, and digital imaging equipment.
FAQ
What is the overvoltage protection threshold for TPS61062DRBR?
The TPS61062DRBR has a minimum overvoltage protection (OVP) threshold of 22.2 V, verified in datasheet Section 7.5. This value is specific to the TPS61062 variant and enables safe operation with five-series white LEDs (typical VF ≈ 16 V) while allowing use of low-voltage-rated output capacitors. The OVP hysteresis is 0.7 V, ensuring stable recovery after overvoltage events.
How does digital brightness control work on TPS61062DRBR?
TPS61062DRBR implements digital brightness control via its ILED pin using an internal 5-bit DAC. When ILED is pulled high, VFB is set to 250 mV (baseline); pulling ILED low in timed pulses (1–75 µs for increment, 180–300 µs for decrement) adjusts VFB in 15.6-mV steps across 32 levels. This allows precise, low-power LED current tuning without continuous PWM generation - a key feature of the TPS61062DRBR.
Can TPS61062DRBR drive more than five white LEDs?
No - the TPS61062DRBR is specified and characterized to drive up to five white LEDs in series, based on its 22.2-V OVP threshold and internal current limit. Attempting to drive six LEDs (requiring >19.2 V nominal) risks exceeding the OVP trip point under worst-case forward voltage and temperature conditions, triggering shutdown. The TPS61062DRBR datasheet explicitly limits operation to five LEDs.
What is the recommended inductor value for TPS61062DRBR?
The TPS61062DRBR datasheet recommends a 22-µH inductor (e.g., Murata LQH32CN220K23) for typical 5-LED applications. Inductor saturation current must exceed peak inductor current - calculated as ILED × (1 + D)/(1 − D), where D = 1 − VIN/VOUT. For 3.6-V input and 17.8-V output (5 LEDs), D ≈ 0.8, requiring ≥350-mA saturation rating. This specification is confirmed in Section 9.2.2.1 of the TPS61062DRBR datasheet.
Does TPS61062DRBR require an external Schottky diode?
No - the TPS61062DRBR integrates a synchronous P-channel MOSFET rectifier, eliminating the need for an external Schottky diode. This reduces conduction losses, improves efficiency by ~5%, and simplifies bill-of-materials. The internal rectifier's on-resistance is specified as 2.5–3.7 Ω in the Electrical Characteristics table, confirming its active role in the power stage - a defining feature of the TPS61062DRBR.
TPS61062DRBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 23.5V
- Current - Output / Channel:
- 400mA (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS61062DRBR FAQ
1.How can I place an order for TPS61062DRBR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61062DRBR 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 TPS61062DRBR reliable?
The price and inventory of TPS61062DRBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61062DRBR is usually 5 days.
3.What payment methods are accepted for TPS61062DRBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61062DRBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61062DRBR?
TPS61062DRBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61062DRBR 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 TPS61062DRBR?
For technical support, including TPS61062DRBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61062DRBR requirements.
6.How does Aetrix verify that TPS61062DRBR is sourced from the original manufacturer or authorized distributors?
All TPS61062DRBR 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 TPS61062DRBR meets industry standards.
7.What is the process for return or replacement of TPS61062DRBR?
All TPS61062DRBR units undergo pre-shipment inspection (PSI). If there is an issue with TPS61062DRBR, 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 TPS61062DRBR part is unused and in its original packaging.
Return procedure for TPS61062DRBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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