UCC25800-Q1 - Ultra-Low EMI Transformer Driver | Texas Instruments
MPN: UCC25800-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for UCC25800-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
UCC25800AQDGNQ1
β Drop-Inπ Reference alternative (not in catalog)
UCC25800BQDGNRQ1
β Drop-Inπ Reference alternative (not in catalog)
UCC25800
β Drop-Inπ Reference alternative (not in catalog)
MPQ18913
β Drop-Inπ Reference alternative (not in catalog)
SN6507
β Drop-Inπ Reference alternative (not in catalog)
UCC25800-Q1 Maximum Ratings & Electrical Characteristics
| Topology | LLC half-bridge |
| Input Voltage Range | 9 V to 34 V |
| Output Power | 9 W (from 34-V input) |
| Switching Frequency Range | 0.1 MHz to 1.2 MHz |
| Package | 8-HVSSOP (DGN) |
| Operating Temperature Range | -40Β°C to 125Β°C |
| EMI Performance | Ultra-low EMI with low interwinding capacitance |
| Protection Features | Overcurrent, thermal shutdown, UVLO |
| Multi-function Pin | External disable and fault code reporting |
| Synchronization | External SYNC pin |
| Automotive Qualification | AEC-Q100 qualified |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Thermal Pad | Yes (exposed pad) |
| Efficiency | High-efficiency half-bridge |
UCC25800-Q1 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | GND β Ground |
| Pin 3 | HO β High-side gate drive output |
| Pin 4 | LO β Low-side gate drive output |
| Pin 5 | VDD β Internal supply for control logic |
| Pin 6 | RT β Frequency programming resistor |
| Pin 7 | SYNC β External synchronization input |
| Pin 8 | EN/FLT β Enable and fault reporting |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
UCC25800-Q1 is suitable for 6 applications: Isolated Gate Driver Bias Supply, On-Board Charger (OBC) Bias Supply, Battery Management System (BMS) Isolated Power, Industrial Isolated Power Supply, DC-DC Converter Bias Supply, Renewable Energy Inverter Bias Supply.
Isolated Gate Driver Bias Supply
The UCC25800-Q1 provides a clean, isolated bias supply for gate drivers in traction inverters and motor drives. Its ultra-low EMI and LLC topology reduce common-mode noise, ensuring reliable gate drive signals. The 9-34 V input range accommodates various battery voltages, and the programmable frequency allows optimization for transformer size and efficiency. With up to 9 W output, it can power multiple gate driver channels, improving system integration and reducing component count.
Recommended
On-Board Charger (OBC) Bias Supply
In electric vehicle on-board chargers, the UCC25800-Q1 supplies isolated bias voltages for control ICs and gate drivers. Its wide input range (9-34 V) handles varying battery voltages, while the low EMI ensures compliance with automotive EMC standards. The LLC topology allows a compact transformer with low interwinding capacitance, reducing common-mode noise that could interfere with sensitive charging circuitry. The device's fault reporting pin enhances system diagnostics and safety.
Recommended
Battery Management System (BMS) Isolated Power
The UCC25800-Q1 provides isolated power for battery monitoring ICs in automotive BMS. Its low EMI is critical to avoid interference with sensitive analog measurements. The device's 9-34 V input range supports 12-V and 24-V battery modules, and the programmable frequency allows synchronization to avoid beat frequencies. The integrated protection features, including overcurrent and thermal shutdown, enhance system reliability in harsh automotive environments.
Recommended
Industrial Isolated Power Supply
For industrial applications, the UCC25800-Q1 offers a compact solution for isolated bias supplies in motor drives, PLCs, and renewable energy systems. Its wide input range and programmable frequency provide flexibility for various input voltages and isolation requirements. The ultra-low EMI helps meet industrial EMC standards, and the 8-pin DGN package with thermal pad ensures reliable operation in high-temperature environments. The device's fault reporting simplifies diagnostics in field installations.
Recommended
DC-DC Converter Bias Supply
The UCC25800-Q1 can power the control circuitry of isolated DC-DC converters, providing a stable bias voltage for PWM controllers and feedback circuits. Its low EMI is beneficial in power supplies where noise can affect regulation. The device's wide input range allows it to be powered from the converter's input bus, and the programmable frequency enables synchronization with the main converter to reduce interference. The integrated protection features ensure robust operation.
Recommended
Renewable Energy Inverter Bias Supply
In solar and wind inverters, the UCC25800-Q1 provides isolated bias power for gate drivers and control electronics. Its wide input range accommodates varying DC bus voltages, and the low EMI helps meet grid-connection standards. The LLC topology allows a compact transformer, reducing board space and cost. The device's automotive-grade reliability is beneficial for outdoor installations where temperature extremes are common.
Recommended
Recommended Products Summary
Engineering reference data for UCC25800-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC25800AQDGNQ1 | UCC25800BQDGNRQ1 | UCC25800 | MPQ18913 | SN6507 |
|---|---|---|---|---|---|---|
| Package | 8-HVSSOP (DGN) | 8-HVSSOP (DGN) | 8-HVSSOP (DGN) | 8-HVSSOP (DGN) | 8-HVSSOP (DGN) | 8-HVSSOP (DGN) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Monolithic Power Systems | Texas Instruments |
| Input Voltage Range | 9 V to 34 V | 9 V to 34 V | 9 V to 34 V | 9 V to 34 V | [DATA_NEEDED] | 2.25 V to 5 V |
| Switching Frequency | 0.1 MHz to 1.2 MHz | 0.1 MHz to 1.2 MHz | 0.1 MHz to 1.2 MHz | 0.1 MHz to 1.2 MHz | [DATA_NEEDED] | 160 kHz to 600 kHz |
| Output Power | 9 W (from 34-V input) | 9 W | 9 W | 9 W | [DATA_NEEDED] | 1.5 W |
| Topology | LLC half-bridge | LLC half-bridge | LLC half-bridge | LLC half-bridge | LLC half-bridge | Push-pull |
| Automotive Grade | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | No | [DATA_NEEDED] | No |
| EMI Performance | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Standard |
Key Differentiators
- Ultra-low EMI with LLC topology (vs SN6507)
- Wide input voltage range (9-34 V) (vs SN6507)
- Higher output power (9 W) (vs SN6507)
Design Notes
Place the input decoupling capacitor (10 Β΅F ceramic) as close as possible to the VIN and GND pins to minimize high-frequency noise. Use a low-ESR output capacitor (e.g., 10 Β΅F X7R) on the secondary side. For the RT pin, place the frequency-setting resistor close to the pin and keep the trace short to avoid parasitic capacitance. The exposed thermal pad should be connected to a large copper pour for heat dissipation.
The UCC25800-Q1 can dissipate significant power at high input voltages and output power. For example, at 34 V input and 9 W output, the power loss may be around 1-2 W. The 8-pin DGN package with thermal pad has a thermal resistance of approximately 40Β°C/W (theta_JA). Ensure adequate copper area on the PCB (at least 1 square inch) to keep the junction temperature below 125Β°C. For high ambient temperatures, consider forced airflow or a heatsink.
When using the SYNC pin, ensure the external synchronization frequency is set such that half the sync frequency is between 15% and 30% of the nominal frequency. Failure to do so can cause output voltage regulation issues. Also, avoid exceeding the absolute maximum input voltage of 34 V. Use a transformer with low interwinding capacitance to fully benefit from the ultra-low EMI design. Verify the transformer's isolation rating meets your application's safety requirements.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS compliant. Halogen-free status not specified in provided data.
