UCC25800-Q1 - Ultra-Low EMI Transformer Driver | Texas Instruments
MPN： UCC25800-Q1 ✓ 啟用中UCC25800-Q1 概覽
A transformer driver is a power management IC that generates an AC voltage from a DC input to drive an isolation transformer, providing isolated DC outputs for gate drivers, sensors, and other bias supplies. It sits within the power management hierarchy: transformer driver -> isolated bias supply -> power management IC -> semiconductor. The UCC25800-Q1 simplifies isolated bias supply design by integrating the half-bridge power stage, oscillator, and protection features, eliminating the need for external high-side drivers and complex control loops.
Key features include programmable switching frequency from 0.1 MHz to 1.2 MHz, enabling optimization for transformer size and EMI. The device offers a dedicated multi-function pin for external disabling and fault code reporting, enhancing system reliability. Its ultra-low EMI performance is achieved through the LLC topology and low interwinding capacitance transformer design, making it ideal for noise-sensitive automotive environments such as electric vehicles (EVs) and hybrid electric vehicles (HEVs).
The UCC25800-Q1 integrates a high-efficiency half-bridge driver with adaptive dead-time control, reducing switching losses and improving efficiency. The device includes comprehensive protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout (UVLO). The 8-pin DGN package with thermal pad provides excellent thermal handling, allowing operation at high ambient temperatures up to 125°C.
Typical applications include isolated gate driver bias supplies for traction inverters, on-board chargers, DC-DC converters, and battery management systems in automotive. It is also suitable for industrial isolated power supplies, motor drives, and renewable energy systems. The wide input range and programmable frequency make it versatile for various power levels and isolation requirements.
When designing with the UCC25800-Q1, ensure proper transformer selection with low interwinding capacitance to maximize EMI benefits. The SYNC pin allows external synchronization, but the external frequency must be set such that half the sync frequency is between 15% and 30% of the nominal frequency to maintain output regulation. Adequate input decoupling and a low-ESR output capacitor are essential for stable operation.
直接替換替代品，適用於 UCC25800-Q1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
UCC25800AQDGNQ1
✅ 直接替換📋 參考替代品（不在目錄中）
UCC25800BQDGNRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
UCC25800
✅ 直接替換📋 參考替代品（不在目錄中）
MPQ18913
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN6507
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
UCC25800-Q1 最大額定值與電氣特性
| 拓撲 | LLC half-bridge |
| 輸入電壓範圍 | 9 V to 34 V |
| Output Power | 9 W (from 34-V input) |
| Switching Frequency Range | 0.1 MHz to 1.2 MHz |
| 封裝 | 8-HVSSOP (DGN) |
| 工作溫度範圍 | -40°C to 125°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 |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Thermal Pad | Yes (exposed pad) |
| 效率 | High-efficiency half-bridge |
UCC25800-Q1 腳位配置
| 腳位 1 | VIN — Input supply voltage |
| 腳位 2 | GND — Ground |
| 腳位 3 | HO — High-side gate drive output |
| 腳位 4 | LO — Low-side gate drive output |
| 腳位 5 | VDD — Internal supply for control logic |
| 腳位 6 | RT — Frequency programming resistor |
| 腳位 7 | SYNC — External synchronization input |
| 腳位 8 | EN/FLT — Enable and fault reporting |
典型應用
UCC25800-Q1 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 UCC25800-Q1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
| Topology | LLC half-bridge | LLC half-bridge | LLC half-bridge | LLC half-bridge | LLC half-bridge | Push-pull |
| EMI Performance | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Ultra-low EMI | Standard |
主要差異化特點
- Ultra-low EMI with LLC topology (對比SN6507)
- Wide input voltage range (9-34 V) (對比SN6507)
- Higher output power (9 W) (對比SN6507)
設計說明
Place the input decoupling capacitor (10 µF 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 µF 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 40°C/W (theta_JA). Ensure adequate copper area on the PCB (at least 1 square inch) to keep the junction temperature below 125°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.
合規資訊
AEC-Q100 qualified per TI product page. RoHS compliant. Halogen-free status not specified in provided data.
