UCC21550BQDWRQ1 - 4A/6A Automotive Isolated Gate Driver | Texas Instruments
MPN： UCC21550BQDWRQ1 ✓ 啟用中UCC21550BQDWRQ1 概覽
An isolated gate driver is a power-management IC that translates low-voltage PWM logic signals across a galvanic isolation barrier to drive the gate of a power transistor floating at high voltage. Within the power electronics hierarchy, it sits between the PWM controller or MCU (such as a C2000 DSP) and the power switch (MOSFET, SiC MOSFET, GaN FET, or IGBT), and is fundamental to isolated half-bridge, full-bridge, and boost converter stages in industrial and automotive power systems.
Key features of the UCC21550BQDWRQ1 include programmable dead time via an external resistor, a disable pin for fast shutdown, 8V undervoltage lockout (UVLO) on the driver supply for robust SiC/IGBT gate protection, and flexible configuration as two low-side drivers, two high-side drivers, or one half-bridge driver. The reinforced isolation barrier supports functional safety and high-voltage designs per automotive requirements.
Architecturally, the device uses TI capacitive isolation technology, which provides high common-mode transient immunity and fast, precise signal transfer across the barrier. The wide operating temperature range supports underhood and industrial environments, and the 4A/6A asymmetric drive strength allows fast turn-off to minimize switching losses in SiC and IGBT stages.
Typical applications include onboard chargers, DC-DC converters, traction inverters, solar string inverters, and motor drives, where a floating high-side switch and reinforced isolation are mandatory.
Design consideration: select the dead-time resistor value per the datasheet formula and verify the driver-side UVLO threshold (8V) matches the selected SiC MOSFET gate-plateau requirements to avoid operating the switch in a high-resistance region.
This page synthesizes distributor availability data, TI product pages, drop-in family alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
直接替換替代品，適用於 UCC21550BQDWRQ1 — 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： UCC21550BQDWRQ1 （相同外形與佔位） — 差異在於 Disable Function, Configuration, Dead Time, Isolation Type, Package.
UCC21550BDWR
✅ 直接替換聯絡詢價
查看資料表 →UCC21540DW
✅ 直接替換📋 參考替代品（不在目錄中）
UCC21520DW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
UCC21530DW
✅ 直接替換📋 參考替代品（不在目錄中）
UCC21550BQDWRQ1 最大額定值與電氣特性
| Driver Type | Dual-channel reinforced isolated gate driver |
| Peak Source Current | 4 A |
| Peak Sink Current | 6 A |
| Isolation Type | Capacitive coupling |
| Isolation Voltage | 5000 Vrms |
| Isolation Grade | Reinforced isolation |
| Number of Channels | 2 |
| Configuration | Two low-side / two high-side / half-bridge |
| Dead Time | Programmable (external resistor) |
| Disable Function | Yes |
| UVLO Threshold | 8 V (driver supply) |
| Target Transistors | Power MOSFET, SiC MOSFET, GaN FET, IGBT |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| 封裝 | 16-SOIC (DW) |
| 安裝類型 | Surface Mount |
UCC21550BQDWRQ1 16-soic (dw) 腳位配置指南
UCC21550BQDWRQ1（16-soic (dw) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： UCC21550BQDWRQ1.
請參閱 資料表 以查看完整腳位配置。
典型應用
UCC21550BQDWRQ1 適用於 6 應用s: Automotive Onboard Charger (OBC), DC-DC Converters and Auxiliary Power, Traction and Motor Drive Inverters, Solar String and Central Inverters, Industrial Motor Drives and Servo Drives, Battery Formation and Test Equipment.
Automotive Onboard Charger (OBC)
The UCC21550BQDWRQ1 fits automotive onboard chargers because its AEC-Q100 qualification, 5000Vrms reinforced isolation, and 4A/6A drive strength address the safety and efficiency demands of PFC and DC-DC stages. Its programmable dead time protects the half-bridge switches in totem-pole PFC or CLLC resonant converters from shoot-through, while the 8V UVLO ensures SiC MOSFET gates are only driven at healthy bias levels. Placed between the C2000 MCU PWM outputs and the power switches, it provides fast, CMTI-robust signal transfer across the isolation barrier; the disable pin enables rapid fault shutdown during overcurrent events.
推薦
DC-DC Converters and Auxiliary Power
In isolated automotive and industrial DC-DC converters (12V/48V auxiliary supplies, CLLC and phase-shifted full-bridge stages), the UCC21550BQDWRQ1 drives the primary-side switches with 6A peak sink current for fast turn-off and minimized switching loss. The dual channels can be configured as a half-bridge driver with internally enforced programmable dead time, simplifying the control interface from a single PWM input pair. The 5000Vrms capacitive isolation barrier separates the high-voltage primary from the low-voltage secondary, and the wide temperature range supports sealed, thermally stressed converter environments.
推薦
Traction and Motor Drive Inverters
For electric-vehicle traction inverters and industrial motor drives, the UCC21550BQDWRQ1 provides the reinforced isolation and rugged 4A/6A drive required by SiC MOSFET and IGBT three-phase bridge stages. The 8V UVLO protects SiC gates from operating in the high-resistance partial-on region during supply brownouts, and high common-mode transient immunity tolerates the large dV/dt switching edges of SiC bridges. Its programmable dead time lets designers tune dead time for efficiency versus safety, and the disable pin supports rapid shutdown from the inverter protection circuitry during overcurrent or desat faults.
推薦
Solar String and Central Inverters
In solar string inverters, the UCC21550BQDWRQ1 drives the boost and inverter bridge power switches where 5000Vrms reinforced isolation between the DC input, AC grid, and control ground is mandatory. The industrial non-Q1 UCC21550BDWR variant suits cost-optimized solar designs, while this Q1 part covers markets requiring automotive-grade components. The programmable dead time feature reduces cross-conduction losses in the half-bridge inverter stage, directly improving weighted efficiency, and the 4A/6A asymmetric drive supports both fast SiC switching and IGBT stages in the same platform.
推薦
Industrial Motor Drives and Servo Drives
Industrial AC and servo drives benefit from the UCC21550BQDWRQ1's flexible configuration: the two channels can serve as two low-side drivers for a three-phase bridge (three devices total) or as a half-bridge for a leg of the inverter. The 16-SOIC (DW) package's wide-body geometry supports board-level creepage and clearance for 400V/690V-class drive designs, and the reinforced isolation grade aligns with functional-safety isolation requirements. The disable pin interfaces with gate-drive protection (desat or overcurrent comparators), and 6A sink current handles IGBT turn-off in higher-power modules.
推薦
Battery Formation and Test Equipment
Battery formation, cycling, and test systems use isolated bidirectional DC-DC stages where the UCC21550BQDWRQ1's dual-channel isolated drive, programmable dead time, and 5000Vrms isolation serve the high-voltage power conversion front end. The automotive Q1 grading provides margin for 24/7 industrial operation, and the 4A/6A drive strength supports both MOSFET and IGBT switches commonly used in formation chargers. The disable input allows the supervisory controller to gate off the power stage instantly during cell fault detection, protecting both the battery cells and the power electronics.
推薦
推薦產品摘要
工程參考資料，適用於 UCC21550BQDWRQ1 — 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 | UCC21550BDWR | UCC21540DW | UCC21520DW | UCC21530DW |
|---|---|---|---|---|---|
| Package | 16-SOIC (DW) | 16-SOIC (DW) - same | 16-SOIC (DW) - same | 16-SOIC (DW) - same | 16-SOIC (DW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- AEC-Q100 automotive qualification (對比UCC21550BDWR)
- On-chip programmable dead time with disable pin (對比UCC21540DW)
- 8V UVLO optimized for SiC gate drives (對比UCC21520DW)
設計說明
The 16-SOIC (DW) wide-body package is chosen for its isolation creepage. Maintain the manufacturer-recommended creepage and clearance distances on the PCB between input-side (VCCI/GND1) and output-side (VDDA/VSSA/VDB/VSSB) copper. Avoid routing high-dV/dt switch-node traces under the package body, and consider a board slot between primary and secondary sections on compact layouts to preserve the reinforced isolation rating in end applications.
Bias each secondary channel with a low-ESR ceramic decoupling capacitor (typically 1 uF to 10 uF, per the datasheet recommendation) placed within a few millimeters of VDDA/VSSB pins to support 4A/6A peak gate currents without supply droop. For high-side channels, size the bootstrap or isolated bias supply for the total gate charge of the SiC MOSFET or IGBT plus the driver quiescent draw, and confirm the 8V UVLO threshold clears the selected switch's Miller plateau voltage.
Do not substitute the automotive Q1 part with the industrial UCC21550BDWR in automotive production without formal customer change approval. When replacing with family alternatives (UCC21540, UCC21520, UCC21530), verify pin mapping, UVLO variant, and dead-time pin functionality against the current TI datasheet - family members share the 16-SOIC footprint but differ in feature sets. Also confirm CMTI margins against your worst-case switch-node dV/dt before finalizing the layout.
合規資訊
AEC-Q100 qualification is confirmed by the -Q1 suffix and TI product page description (UCC21550-Q1 automotive family). RoHS/REACH/lead-free/halogen details should be confirmed from TI's product page quality section for the exact ordering part number.