UCC21550Q-Q1 - 4A/6A Isolated Dual Gate Driver | TI
MPN： UCC21550Q-Q1 ✓ 啟用中UCC21550Q-Q1 概覽
An isolated gate driver is a power management IC that provides galvanic isolation between a low-voltage controller (such as an MCU) and the high-voltage power stage of a switching converter or motor inverter. Within the power-electronics hierarchy, it sits between the PWM controller and the power transistor, translating logic-level signals across the isolation barrier while providing the high peak currents needed to rapidly charge and discharge transistor gates.
Key features include a capacitive isolation architecture with high common-mode transient immunity for fast-switching WBG devices, programmable dead time via a single resistor for half-bridge configurations, and flexible configuration as two low-side, two high-side, or one half-bridge driver. A disable pin and interlock function prevent shoot-through. Per TI product data, the family supports both A and B grade options with different propagation delay specifications.
The driver uses TI capacitor-based isolation technology, which avoids the aging characteristics of optocouplers and sustains high dV/dt events typical of SiC and GaN switching. High CMTI and fast propagation delay enable narrow dead times, improving converter efficiency in high-frequency designs.
Typical applications include on-board chargers and traction inverters in electric vehicles, solar string inverters, industrial motor drives, server and telecom power supplies, and wireless charging power stages.
Design consideration: program the dead-time resistor per the datasheet equation and keep the gate-drive loops short; verify thermal dissipation from gate-charge losses at your switching frequency before finalizing the layout.
直接替換替代品，適用於 UCC21550Q-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。
此系列的變體
與下列產品可直接替換的同系列型號： UCC21550Q-Q1 （相同外形與佔位） — 差異在於 Package, Isolation Rating, Automotive Qualification, UVLO, Operating Temperature.
UCC21540QDWKRQ1
✅ 直接替換✗ 缺貨
$2.21 / 單位
查看資料表 →UCC21520Q-Q1
✅ 直接替換聯絡詢價
查看資料表 →UCC21521Q-Q1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →UCC21530Q-Q1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →UCC21550Q-Q1 最大額定值與電氣特性
| Product Type | Reinforced isolated dual-channel gate driver |
| Peak Source Current | 4 A |
| Peak Sink Current | 6 A |
| Number of Channels | 2 |
| Isolation Rating | 5000 Vrms (reinforced) |
| Isolation Technology | Capacitive coupling |
| Configurations | Dual low-side, dual high-side, or half-bridge |
| Programmable Dead Time | Yes (single resistor) |
| Target Transistors | Power MOSFET, SiC, GaN, IGBT |
| 工作溫度 | -40C to +150C |
| 封裝 | 16-SOIC (DW) |
| 安裝類型 | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Disable Function | Yes |
| RoHS 狀態 | Compliant |
UCC21550Q-Q1 腳位配置
| 腳位 1 | VCCI — Input-side supply voltage |
| 腳位 2 | GND — Input-side ground |
| 腳位 3 | INH — Input A (high-side channel) |
| 腳位 4 | DT — Dead-time programming resistor pin |
| 腳位 5 | INL — Input B (low-side channel) |
| 腳位 6 | DIS — Disable input |
| 腳位 8 | VDDA — Output A supply |
| 腳位 9 | OUTA — Output A gate drive |
| 腳位 10 | VSSA — Output A return (switching node for high-side) |
| 腳位 12 | VDDB — Output B supply |
| 腳位 13 | OUTB — Output B gate drive |
| 腳位 16 | VSSB — Output B return (ground for low-side) |
典型應用
UCC21550Q-Q1 適用於 6 應用s: Automotive On-Board Chargers, Solar String Inverters, Industrial Motor Drives, Server and Telecom Power Supplies, Traction Inverters (xEV), Wireless Charging Power Stages.
Automotive On-Board Chargers
The UCC21550Q-Q1 suits automotive OBC PFC and LLC stages because its AEC-Q100 qualification and -40C to 150C range meet vehicle environmental requirements, while 4A/6A drive strength switches SiC MOSFETs quickly to reach the high frequencies (100 kHz+) needed for power-dense converters. Programmed dead time via a single resistor simplifies half-bridge timing in LLC topologies, and 5000Vrms reinforced isolation safely separates the high-voltage DC bus from the low-voltage control domain.
推薦
Solar String Inverters
In solar inverters, the UCC21550Q-Q1 drives SiC or IGBT half-bridges in the DC-DC boost and DC-AC inverter stages. The capacitive isolation barrier withstands the large dV/dt common-mode swings of a switching bridge, and the programmable dead time lets designers tune efficiency versus Shoot-through margin per operating condition. Its reinforced 5000Vrms isolation satisfies grid-tied safety isolation requirements between the PV array and grid side.
推薦
Industrial Motor Drives
For three-phase industrial motor drives, the UCC21550Q-Q1 provides high-side and low-side drive for IGBT or MOSFET power stages with reinforced isolation per phase. The 6A peak-sink current prevents Miller-induced spurious turn-on in high-voltage IGBTs, and the wide -40C to 150C operating range suits sealed drive enclosures. Interlock and disable functions protect against shoot-through during PWM fault conditions.
推薦
Server and Telecom Power Supplies
In high-density server PSU and telecom rectifier designs, the UCC21550Q-Q1 drives SiC devices in totem-pole PFC and LLC stages where switching frequencies above 100 kHz demand fast gate transitions. The high CMTI capacitive isolation rejects ground-bounce transients, while programmable dead time minimizes body-diode conduction losses, directly improving peak efficiency figures that datacenter power contracts require.
推薦
Traction Inverters (xEV)
Automotive traction inverters using SiC MOSFET modules require drivers with reinforced isolation, high CMTI, and automotive qualification - all provided by the UCC21550Q-Q1 in its 16-SOIC package. The 4A source and 6A sink currents support fast SiC switching to reduce switching losses at high phase currents, and functional-isolation system architectures can leverage multiple drivers across the three inverter legs.
推薦
Wireless Charging Power Stages
EV wireless charging transmitters use high-frequency resonant half-bridges where the UCC21550Q-Q1 drives SiC MOSFETs with precise programmed dead time to maintain resonant operation. The -40C to 150C range handles outdoor pad electronics, and reinforced isolation protects the low-voltage control electronics from the high circulating tank voltages inherent to inductive power transfer.
推薦
推薦產品摘要
工程參考資料，適用於 UCC21550Q-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 | UCC21540QDWKRQ1 | UCC21520Q-Q1 | UCC21521Q-Q1 | UCC21710-Q1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Peak Source Current | 4 A | 4 A class | 4 A | 2.5 A / 5 A (variant) | 10 A |
| Peak Sink Current | 6 A | 6 A class | 6 A | variant-dependent | 14 A |
| Isolation Rating | 5000 Vrms reinforced | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Automotive Grade | Yes (AEC-Q100 Q1) | Yes (Q1) | Yes (Q1) | Yes (Q1) | Yes (Q1) |
| Channels | 2 (dual) | 2 | 2 | 2 | 1 |
| Operating Temperature | -40C to 150C | -40C to 150C | -40C to 150C | -40C to 150C | -40C to 150C |
主要差異化特點
- Integrated programmable dead time (對比UCC21540QDWKRQ1)
- Asymmetric 4A source / 6A sink drive (對比UCC21521Q-Q1)
- Automotive AEC-Q100 qualification (對比UCC21550 (standard))
設計說明
Place VDDA/VDDB decoupling capacitors (typically 100nF ceramic plus 10uF bulk per TI datasheet layout recommendations) as close as possible to each output-side supply pin. Keep gate-drive loops short and wide to minimize loop inductance, which is critical when driving SiC/GaN at high dV/dt. Route the DT resistor away from high-voltage switching nodes to avoid capacitive coupling into the dead-time setting.
In half-bridge configuration, the OUTA return (VSSA) connects to the switching node - account for the bootstrap or isolated supply needed for VDDA. Confirm the dead-time resistor value against the datasheet equation for your target dead time; incorrect resistor selection can either cause shoot-through at very low values or excessive body-diode conduction losses at high values.
Gate-driver dissipation equals Qg x fsw x (VDD drive energy) plus quiescent losses. For a SiC FET with ~60nC total gate charge switching at 100kHz from an 18V drive, per-channel gate-drive power is roughly 0.1W - manageable in the 16-SOIC, but verify junction temperature at the 150C maximum ambient rating in sealed automotive enclosures.
The capacitive isolation barrier provides high CMTI, but minimize common-mode impedance by connecting VSSA and VSSB returns with short, low-inductance traces. Consider a small RC snubber across the switching node in high-voltage SiC designs to control ringing that could couple into input-side logic.
合規資訊
AEC-Q100 qualified per UCC21550-Q1 automotive family designation. RoHS status from TI/DigiKey product data; REACH and halogen-free status not stated in provided data.