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Texas Instruments UCC25710DWR
- Part No.:
- UCC25710DWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC25710DWR.pdf
- Description:
- IC LED DRIVER OFFL PWM 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,558
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Product details
Overview
UCC25710DWR from Texas Instruments is an LLC half-bridge controller for multi-string LED lighting, providing closed-loop current regulation across N LED strings, programmable FMIN (30.5 kHz typical) and FMAX (300 kHz typical), 500 ns fixed dead time, and integrated PWM dimming control with slew-rate-adjusted LLC on/off ramping. It targets high-efficiency LCD TV backlight systems using multi-transformer architectures.
For engineers reviewing the UCC25710DWR datasheet, UCC25710DWR pinout, UCC25710DWR application, or UCC25710DWR equivalent, this device delivers precise string-current matching (<1%), dimming linearity <2% over 1–100% duty cycle, and dual-threshold protection (restart + latch-off) - critical for robust LED backlight power design.
Technical Context
The UCC25710DWR implements a voltage-controlled oscillator (VCO) whose frequency sweeps from FMAX down to zero at low dimming levels to maximize efficiency, while maintaining closed-loop current control via ICOMP-sourced VCO input during LED ON-time. Its GM current amplifier regulates LED string current by comparing CS voltage against CREF-set reference (0.6–2.7 V range), with internal clamps at 0.5 V and 2.8 V.
Dimming is executed through coordinated control: DIM input gates both external LED series switches (via LEDSW output) and the LLC half-bridge (GD1/GD2), with DSR-programmed slew rates suppressing audible noise; DTY/DADJ circuitry extends LLC ON-time beyond LED ON-time at low dimming duty cycles to sustain regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| FMIN | 30.5 kHz typical - sets lowest operating frequency for light-load efficiency optimization |
| FMAX | 300 kHz typical - defines upper switching limit for transient response and transformer sizing |
| Dead Time | 500 ns fixed - prevents shoot-through in half-bridge gate drive outputs GD1/GD2 |
| VREF Output | 5.0 V ±1.5% - supplies bias for internal blocks and external resistor dividers (e.g., CREF) |
| Gate Drive Current | ±400 mA / ±800 mA peak sink/source - drives primary-side gate transformers directly |
| Dimming Linearity | <2% error over 1–100% duty cycle - ensures consistent luminance across full dimming range |
| LED String Matching | <1% current mismatch between strings - enables uniform brightness in multi-transformer backlight designs |
Pinout & Package
UCC25710DWR is housed in a lead-free 20-pin SOIC package (12.80 mm × 7.50 mm body size) with standard JEDEC MS-013AC footprint and thermal resistance RθJA = 79 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Accepts 11–18 V DC; powers gate drivers and internal bias rails; UVLO activates at 9.3 V turn-on |
| GD1 / GD2 | Half-bridge gate drive outputs | 180° out-of-phase, 500 ns dead time; drive primary side of gate drive transformers |
| GND | Analog/digital ground reference | Common return for gate drive signals and analog sensing; requires low-inductance PCB layout |
| VREF | 5-V precision reference output | Stable 5.0 V ±1.5% rail; powers external dividers (e.g., CREF) and supports up to 10 mA load |
| LEDSW | PWM-controlled LED series switch driver | Active-low output synchronized to DIM; requires external FET driver for high-side LED switching |
| DIM | PWM dimming input | Active-high signal (1.2–1.5 V threshold); controls both LEDSW and LLC stage timing |
| BLON | Backlight enable input | Active-high (1.2 V threshold); enables VREF and initiates soft-start sequence when asserted |
| OV / UV | LED string overvoltage/undervoltage sense | Resistive divider inputs; trip thresholds at 2.6 V (OV) and 2.4 V (UV); trigger 10-ms reset + soft start |
| CS | Current sense input | Monitors LED string current via shunt resistor; compared to CREF voltage in transconductance amplifier |
| ICOMP | Current amplifier compensation output | Loop compensation node; slaved to VCO during regulation; tri-stated during PWM OFF-time |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop LED string current control | Maintains tight current regulation across all strings using CS/CREF feedback and ICOMP-compensated VCO |
| Programmable dimming slew rate | DSR pin accepts capacitor to set symmetric positive/negative VCO frequency ramp rates, eliminating audible noise |
| Dual-threshold input overcurrent protection | CL pin provides restart (0.95 V) or latch-off (1.9 V) response - enables fail-safe system-level fault handling |
| Accurate VREF with wide load capability | 5.0 V ±1.5% over –40°C to 125°C; supports 10 mA external load for stable biasing of sensing networks |
| Soft-start with SS pin control | ISS = 2.5 µA charging current; 4.2 V threshold ensures controlled VCO ramp-up and avoids inrush stress |
Applications
| LCD TV Backlight | Commercial Monitor Lighting |
|---|---|
|
Use Scenario: Driving 4–12 parallel LED strings in edge-lit or direct-lit LCD panels with 1000+ nits peak brightness. IC Role / Device Role / Timing Role: LLC half-bridge controller managing resonant tank frequency, LED current regulation, and synchronized PWM dimming. Use Value: Achieves <1% inter-string current mismatch and >94% system efficiency from PFC output to LED load. |
Use Scenario: High-reliability backlight for medical imaging monitors requiring flicker-free dimming down to 0.1%. IC Role / Device Role / Timing Role: Closed-loop current regulator with DSR-controlled dimming ramps and thermal shutdown coordination. Use Value: Enables <2% dimming linearity from 1–100% duty cycle and auto-restart after UV/OV faults. |
| Industrial Display Backlight | High-Brightness Signage |
|
Use Scenario: Outdoor kiosk displays operating in –40°C to 85°C ambient with wide-input AC-DC front-end. IC Role / Device Role / Timing Role: Multi-string controller interfacing with PFC-stage DC bus and supporting BLON-enabled sequencing. Use Value: Delivers stable operation across temperature with VREF accuracy ±1.5% and FMIN/FMAX drift <±1.5 kHz. |
Use Scenario: Large-format LED signage using multi-transformer architecture to drive >20 strings per channel. IC Role / Device Role / Timing Role: Centralized LLC timing generator with independent LEDSW gating and CREF-programmable current setpoint. Use Value: Supports scalable string count via external transformer count; maintains <1% current matching without per-string ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LLC-based multi-string LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC25713DWR | Same SOIC-20 package; adds integrated 5-V LDO for VCC generation (eliminates external bias supply) | Better suited for designs lacking dedicated 12-V bias rail; identical dimming and protection features | Select UCC25713DWR if simplifying auxiliary supply design outweighs minor BOM cost increase |
| NCP1397ADR2G | Fixed-frequency LLC controller (no VCO sweep); no integrated LEDSW output or DSR dimming ramp control | Requires external PWM logic for LED switching; lacks closed-loop dimming linearity compensation | Choose NCP1397ADR2G only for non-dimming or analog-dimming-only systems where cost is primary constraint |
Compared with UCC25710DWR, UCC25713DWR reduces system component count via integrated LDO, while NCP1397ADR2G trades dimming sophistication for lower gate-count implementation - making UCC25710DWR optimal for high-fidelity, flicker-free backlighting requiring precise current and timing control.
Availability
UCC25710DWR is available at Aetrix Electronics and suitable for LCD TV backlight, commercial monitor lighting, and industrial display applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCC25710DWR 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 and embedded processing technologies, with leadership in power management and LED lighting control ICs.
The UCC25710DWR belongs to TI's high-efficiency LED backlight controller product line, engineered specifically for multi-transformer, multi-string architectures to maximize system efficiency (>94%) and inter-string current matching (<1%).
FAQ
What is the recommended VCC bypass capacitor for UCC25710DWR?
The UCC25710DWR requires a minimum 0.47-µF ceramic capacitor placed close to the VCC pin and GND. This capacitor stabilizes the internal gate drivers and VREF rail during transient load changes. Larger values (e.g., 1 µF) may improve noise immunity but must maintain low ESL/ESR to prevent resonance issues in high-frequency LLC operation.
How does UCC25710DWR achieve dimming linearity below 10% duty cycle?
The UCC25710DWR maintains dimming linearity down to 1% by extending the LLC ON-time beyond the LEDSW active period using DADJ/DTY circuitry. This preserves closed-loop current regulation even when LED current is gated off, preventing loss of control and ensuring <2% total linearity error across the full 1–100% range.
Can UCC25710DWR drive MOSFETs directly without gate drive transformers?
No - UCC25710DWR's GD1/GD2 outputs are designed to drive the primary side of gate drive transformers, not power MOSFETs directly. Its ±400 mA / ±800 mA peak drive capability targets transformer-coupled isolation; direct FET driving would exceed safe operating area due to lack of level-shifting and insufficient voltage swing.
What protection features does UCC25710DWR include for LED string faults?
The UCC25710DWR provides OV and UV protection via dedicated pins (OV/UV) with accurate 2.6 V / 2.4 V thresholds and 240 mV hysteresis. Fault detection triggers immediate GD1/GD2 and LEDSW disable, followed by a 10-ms TRSTDLY reset delay and soft-start recovery - ensuring safe, repeatable fault handling without manual intervention.
Is the VREF pin on UCC25710DWR internally regulated and how much current can it source?
Yes - the VREF pin delivers a tightly regulated 5.0 V ±1.5% output over –40°C to 125°C and can source/sink up to ±10 mA. It powers internal circuitry and external resistor networks (e.g., CREF divider), and remains enabled only when both VCC exceeds 9.3 V and BLON is above 1.2 V.
UCC25710DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 11V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
UCC25710DWR FAQ
1.How can I place an order for UCC25710DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC25710DWR 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 UCC25710DWR reliable?
The price and inventory of UCC25710DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC25710DWR is usually 5 days.
3.What payment methods are accepted for UCC25710DWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC25710DWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC25710DWR?
UCC25710DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC25710DWR 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 UCC25710DWR?
For technical support, including UCC25710DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC25710DWR requirements.
6.How does Aetrix verify that UCC25710DWR is sourced from the original manufacturer or authorized distributors?
All UCC25710DWR 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 UCC25710DWR meets industry standards.
7.What is the process for return or replacement of UCC25710DWR?
All UCC25710DWR units undergo pre-shipment inspection (PSI). If there is an issue with UCC25710DWR, 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 UCC25710DWR part is unused and in its original packaging.
Return procedure for UCC25710DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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