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Texas Instruments TPS61062YZFT
- Part No.:
- TPS61062YZFT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS61062YZFT.pdf
- Description:
- IC LED DRIVER RGLTR DIM 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
TPS61062YZFT from Texas Instruments is a synchronous boost LED driver IC designed to deliver constant current to up to five white LEDs in series. It operates from 2.7 V to 6 V input, features 1-MHz fixed-frequency PWM control, integrated 400-mA N-channel MOSFET switch and synchronous P-channel rectifier, and provides digital (ILED pin) and PWM (EN pin) brightness control. It is used in compact portable displays requiring precise current regulation and overvoltage protection.
For engineers reviewing the TPS61062YZFT datasheet, TPS61062YZFT pinout, TPS61062YZFT application, or TPS61062YZFT equivalent, key selection considerations include its 22.2-V overvoltage protection threshold, 250-mV/500-mV selectable feedback voltage, 5-bit DAC-based digital dimming, thermal shutdown at 160°C, and NanoFree™ 8-ball CSP package for space-constrained handheld designs.
Technical Context
The TPS61062YZFT implements peak-current-mode PWM control with a fixed 1-MHz switching frequency and internal loop compensation. Its architecture integrates a 400-mA N-channel power switch and synchronous P-channel rectifier, enabling continuous conduction mode operation for low-noise performance and elimination of switch-node ringing.
It employs a 5-bit DAC on the ILED pin to adjust feedback voltage in 15.6-mV steps between 240 mV and 500 mV, enabling 32-step digital brightness control. Overvoltage protection triggers at 22.2 V (min), hysteresis is 0.7 V, and short-circuit detection activates when output voltage falls below VIN – 0.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 6.0 V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH battery inputs without external regulation. |
| Output Overvoltage Threshold | 22.2 V (min) - enables use of low-voltage-rated (e.g., 25-V) ceramic output capacitors for cost and size savings. |
| Feedback Voltage Options | 250 mV (ILED = high) or 500 mV (ILED = GND) - lower VFB reduces sense resistor power loss, improving efficiency by ~2% in 3-LED configurations. |
| Switching Frequency | 1 MHz (±20%) - allows use of small 22-µH inductors and 220-nF ceramic output capacitors, minimizing board area. |
| Digital Dimming Resolution | 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: 0.6 Ω (typ, VIN = 3.6 V); P-channel synchronous rectifier - eliminates external diode, increasing efficiency to up to 80%. |
| Thermal Protection | Junction shutdown at 160°C (typ), 15°C hysteresis - prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
TPS61062YZFT uses an 8-ball NanoFree™ (DSBGA) package measuring 1.446 mm × 1.446 mm, with bottom-side solder balls and no exposed thermal pad. The package is optimized for ultra-compact portable applications and requires standard CSP reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply | Connects to 2.7–6 V source; powers internal circuitry and switch driver; requires 1-µF ceramic input capacitor. |
| EN | Enable / PWM dimming input | Pulled high to enable; accepts PWM signals ≤1 kHz for analog brightness control; includes 300-kΩ internal pulldown. |
| GND | Analog ground reference | Reference node for FB, ILED, and internal error amplifier; must be low-impedance connection to system ground plane. |
| SW | Switch node | Connects to inductor and diode/capacitor network; carries high-frequency AC current; layout critical for EMI and efficiency. |
| FB | Current-sense feedback | Regulates LED current via external Rs; voltage set to 250 mV or 500 mV depending on ILED logic state. |
| OUT | Boost output | High-impedance current-source output driving LED anodes; includes 22.2-V overvoltage and short-circuit protection. |
| ILED | Digital brightness control | Configures feedback voltage and enables 32-step DAC programming via timed low pulses (1–300 µs); high = 250 mV mode. |
| PGND | Power ground | Return path for high-current switch and inductor; must be routed separately from analog ground to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous rectification | Eliminates external Schottky diode, reducing forward drop losses and improving efficiency by 5–10% vs. asynchronous designs. |
| Programmable overvoltage protection | 22.2-V threshold (TPS61062-specific) allows safe use of 25-V ceramic capacitors instead of larger, higher-voltage alternatives. |
| Dual brightness control interface | Independent EN (PWM) and ILED (digital) pins enable flexible system-level dimming-processor sleep during static brightness, real-time PWM for dynamic effects. |
| Precharge current limiting | 100-mA typical precharge during startup prevents inrush into LED string, ensuring reliable turn-on without forward-voltage overshoot. |
| Short-circuit detection & recovery | Monitors OUT voltage; enters precharge mode (≤100 mA) if shorted to GND, then resumes normal regulation once fault clears. |
Applications
| Backlit Keypad Lighting | Smartphone Status Indicator |
|---|---|
Use Scenario: Illuminating mechanical keypad buttons in low-light conditions using a compact 3-LED series string. IC Role / Device Role / Timing Role: Constant-current boost driver regulating 20 mA per LED with 1-MHz switching to minimize EMI near RF sections. Use Value: 250-mV feedback mode increases efficiency by ~1.8% versus 500-mV mode, extending battery life in always-on standby operation. |
Use Scenario: Driving a single high-brightness status LED on smartphone front bezel, requiring smooth dimming and low quiescent current. IC Role / Device Role / Timing Role: Current-source LED driver with digital brightness control via ILED pin, eliminating need for MCU PWM peripheral. Use Value: 5-bit DAC enables 32 discrete brightness levels with <1 µA additional I/O loading, preserving MCU sleep mode integrity. |
| Digital Camera Flash Assist | Portable Medical Display Backlight |
Use Scenario: Providing auxiliary illumination for autofocus assist in compact digital still cameras during low-light capture. IC Role / Device Role / Timing Role: Boost converter powering 5-white-LED string in series; OVP set to 22.2 V matches max LED string voltage (5 × 3.6 V). Use Value: Integrated short-circuit protection ensures safe operation if LED string opens or shorts during field use, preventing inductor saturation or thermal runaway. |
Use Scenario: Driving 4-white-LED backlight in handheld medical diagnostic device requiring stable luminance across temperature and battery discharge. IC Role / Device Role / Timing Role: Precision current regulator with ±2% LED current accuracy over –40°C to +85°C ambient, enabled by 250-mV VFB and low-drift Rs. Use Value: 80% peak efficiency at 20 mA maintains low PCB temperature rise (<15°C ΔT), critical for clinical-grade thermal safety compliance. |
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 |
|---|---|---|---|
| TPS61062DRBT | Same electrical specs; uses 3-mm × 3-mm QFN-8 package with exposed thermal pad (PowerPAD™), RθJA = 47.6°C/W vs. 120.8°C/W for YZF. | Better thermal performance in high-power or high-ambient environments; requires larger PCB footprint and thermal vias. | Select DRBT for >30 mA average LED current or ambient >70°C; YZF preferred for ultra-thin, space-constrained designs. |
| MAX1910EUT+T | Fixed 500-mV VFB only; no digital dimming; 500-kHz switching; 300-mA switch; OVP = 20 V; SOT-23-6 package. | Lacks ILED-based DAC dimming and 1-MHz operation; limited to ≤4 LEDs; lower integration (no synchronous rectifier). | Choose MAX1910 for cost-sensitive, low-complexity 2–4 LED applications where 32-step dimming and 1-MHz EMI control are not required. |
Compared with TPS61062DRBT and MAX1910EUT+T, the TPS61062YZFT uniquely balances ultra-small footprint (1.45 mm²), 32-step digital dimming, and 22.2-V OVP-making it optimal for next-gen smartphones and wearables where board area and firmware simplicity are primary constraints.
Availability
TPS61062YZFT is available at Aetrix Electronics and suitable for smartphone display backlights, portable medical device indicators, digital camera assist lighting, and handheld industrial HMI requiring stable component supply and long-term production continuity.
Supply support for TPS61062YZFT 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 connectivity technologies, with decades of expertise in power management ICs for portable electronics.
The TPS6106x product line was engineered specifically for space-constrained, battery-powered devices needing high-efficiency, digitally controllable LED drivers-targeting cellular phones, PDAs, digital cameras, and handheld instrumentation.
FAQ
What is the overvoltage protection threshold for TPS61062YZFT?
The TPS61062YZFT has a guaranteed minimum overvoltage protection (OVP) threshold of 22.2 V, with typical trip at 23.5 V and maximum at 25 V. This OVP level is specific to the TPS61062 variant and is factory-set-distinct from the 14 V (TPS61060) and 18 V (TPS61061) thresholds in the same family. The OVP hysteresis is 0.7 V, ensuring stable recovery after fault clearance. This value directly enables use of 25-V-rated ceramic output capacitors in five-LED string applications.
How does digital brightness control work on the TPS61062YZFT ILED pin?
The TPS61062YZFT implements digital brightness control via a 5-bit DAC referenced to the ILED pin. When ILED is pulled high, feedback voltage defaults to 250 mV; pulling ILED low initiates stepwise programming: a 1–75 µs low pulse increments VFB by 15.6 mV, while a 180–300 µs low pulse decrements it. Each step changes LED current proportionally. Full range spans 240–500 mV, yielding 32 discrete brightness levels. The TPS61062YZFT requires no external clock or data lines-only timed GPIO toggling.
Can TPS61062YZFT drive more than five white LEDs?
No, the TPS61062YZFT is rated and characterized to safely drive up to five white LEDs in series. Its 22.2-V OVP threshold and internal current limit (400-mA switch, 325-mA min current limit) are optimized for typical white LED forward voltages of 3.0–3.6 V per device, resulting in a maximum string voltage of ~18 V. Attempting to drive six LEDs would exceed both the OVP guardband and practical output capability under low-input conditions (e.g., 2.7 V VIN), risking premature OVP shutdown or regulation failure. The TPS61062YZFT datasheet explicitly specifies "powers up to 5 LEDs" as a functional limit.
What is the recommended output capacitor for TPS61062YZFT?
The TPS61062YZFT is validated to operate reliably with ceramic output capacitors as low as 220 nF, provided X5R or X7R dielectric is used to maintain capacitance across temperature and DC bias. For most 5-LED applications, 470 nF to 1 µF is recommended to balance ripple suppression (<10 mVpp), board area, and cost. The capacitor must be placed directly between the OUT and PGND pins-not across the LED string-to minimize high-frequency loop area and ensure effective overvoltage protection response. Larger values (>2.2 µF) offer diminishing ripple reduction but increase start-up time and physical footprint.
Does TPS61062YZFT require external compensation components?
No, the TPS61062YZFT includes fully internal loop compensation optimized for its peak-current-mode control architecture and fixed 1-MHz switching frequency. No external compensation network (e.g., RC networks on COMP or FB pins) is required or supported. The device is designed for plug-and-play operation with only four external passive components: input capacitor (1 µF), inductor (22 µH), sense resistor (Rs), and output capacitor (≥220 nF). This simplifies layout, reduces BOM count, and eliminates tuning effort-key advantages of the TPS61062YZFT for rapid prototyping and high-volume manufacturing.
TPS61062YZFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, DSBGA
- 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-DSBGA
TPS61062YZFT FAQ
1.How can I place an order for TPS61062YZFT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61062YZFT 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 TPS61062YZFT reliable?
The price and inventory of TPS61062YZFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61062YZFT is usually 5 days.
3.What payment methods are accepted for TPS61062YZFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61062YZFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61062YZFT?
TPS61062YZFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61062YZFT 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 TPS61062YZFT?
For technical support, including TPS61062YZFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61062YZFT requirements.
6.How does Aetrix verify that TPS61062YZFT is sourced from the original manufacturer or authorized distributors?
All TPS61062YZFT 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 TPS61062YZFT meets industry standards.
7.What is the process for return or replacement of TPS61062YZFT?
All TPS61062YZFT units undergo pre-shipment inspection (PSI). If there is an issue with TPS61062YZFT, 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 TPS61062YZFT part is unused and in its original packaging.
Return procedure for TPS61062YZFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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