UCC5881-Q1 - 20A Isolated SiC/IGBT Gate Driver | Texas Instruments
Référence : UCC5881-Q1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $9.85 | $9,85 |
| 10 | $8.95 | $89,50 |
| 100 | $8.1 | $810,00 |
| 500 | $7.25 | $3 625,00 |
| 1 000 | $6.5 | $6 500,00 |
UCC5881-Q1 Présentation
An isolated gate driver is a power-semiconductor interface IC that combines galvanic isolation with high-current gate drive capability, allowing a low-voltage controller to safely command a high-voltage power switch. Isolated gate drivers sit hierarchically between gate drivers and isolated power modules; in EV traction inverters they bridge the 12 V domain MCU and the 400 V or 800 V DC bus, enabling functional-safety-compliant drive of SiC MOSFETs and IGBTs at MHz-class switching frequencies.
Key features include 14 selectable DESAT leading-edge blanking settings, 5 DESAT deglitch filter settings, and 16 DESAT threshold settings for configurable short-circuit protection. The device also integrates shunt-resistor-based over-current detection, over-temperature sensing (PTC, NTC, or diode), two-level soft turn-off during faults, an integrated 10-bit ADC, and ASIL-compliant diagnostics. Compared with the predecessor UCC5880-Q1, the UCC5881-Q1 adds more DESAT configurability and an INT_COMM fault filter while remaining pin-to-pin compatible.
Technically, the UCC5881-Q1 uses TI's proprietary capacitive-isolation technology to deliver 5000 Vrms reinforced isolation. The 20 A adjustable drive strength reduces switching losses by up to 80 percent versus fixed-strength drivers, and the integrated ADC enables closed-loop temperature and current telemetry directly to the MCU.
Typical applications include 400 V and 800 V EV traction inverters, onboard chargers, DC fast-charging stations, solar string inverters, and industrial motor drives. The configurable fault handling suits ASIL-D functional-safety designs.
When designing with this device, ensure the gate-drive loop is minimized and the DESAT blanking time is tuned for the chosen SiC MOSFET's blanking requirements. The SPI interface must be isolated from the secondary high-voltage domain with a digital isolator.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering information for EV powertrain and renewable-energy power-conversion designers.
Alternatives de remplacement direct pour UCC5881-Q1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec UCC5881-Q1 (même facteur de forme et même empreinte) — différant par Functional Safety, Number of Channels, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
UCC5880QDFCRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCC5871QDFCRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UCC5881-Q1 Valeurs maximales et caractéristiques électriques
| Driver Type | Isolated gate driver, single channel |
| Isolation Type | Capacitive coupling |
| Isolation Voltage Rating | 5000 Vrms |
| Maximum Drive Current | 20 A |
| Configured Switch Type | IGBT, SiC MOSFET |
| Number of Channels | 1 |
| Integrated ADC | 10-bit |
| Communication Interface | SPI (programmable) |
| Short-Circuit Protection | DESAT with 16 thresholds, 5 deglitch settings, 14 leading-edge blanking settings |
| Over-Current Protection | Shunt-resistor based |
| Over-Temperature Protection | PTC, NTC, or diode sensing |
| Fault Turn-Off | Soft turn-off or two-level soft turn-off, selectable |
| Automotive Qualification | AEC-Q100 qualified |
| Functional Safety | ASIL-compliant diagnostics |
| Boîtier | 32-SSOP (DFC) with thermal pad |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Guide de configuration des broches du UCC5881-Q1 32-ssop (dfc) with thermal pad
Configuration des broches du UCC5881-Q1 (boîtier 32-ssop (dfc) with thermal pad). Ce composant de puissance comporte des bornes de grille, de drain et de source. Pour les boîtiers non polarisés, consultez la fiche technique du fabricant pour l'orientation exacte de la broche 1 et les détails de l'empreinte. Les applications courantes incluent la conception d'alimentations, la commande de moteurs et la commutation de charges.
Aucune donnée de brochage détaillée disponible pour UCC5881-Q1.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
UCC5881-Q1 convient pour 6 applications: 800 V EV Traction Inverter, Onboard Battery Charger (OBC), DC Fast Charging Station, Solar String Inverter, Industrial Servo Drive, Energy Storage System (ESS) Bidirectional DC-DC.
800 V EV Traction Inverter
The UCC5881-Q1 is designed as the gate driver for SiC MOSFET power modules in 800 V EV traction inverters. Its 5000 Vrms capacitive isolation handles the 800 V DC-link with margin, while the 20 A adjustable drive strength reduces switching loss by up to 80 percent versus fixed-strength drivers at high dV/dt. Placed between the 12 V domain MCU and the SiC module gate, it provides ASIL-D-compliant DESAT protection with 16 configurable thresholds and two-level soft turn-off. Unlike opto-isolated drivers, the capacitive isolation supports 1 MHz switching frequencies typical of modern SiC traction stages.
Recommandé
Onboard Battery Charger (OBC)
The UCC5881-Q1 drives the primary-side SiC MOSFETs in 22 kW EV onboard chargers operating from 400 V or 800 V battery packs. Its 10-bit integrated ADC enables closed-loop monitoring of drain current and module temperature, simplifying ASIL-B functional-safety implementations. The SPI programmability lets designers tune the gate current profile for each OBC operating mode (CC, CV, PFC), reducing EMI filter cost. Placed in a totem-pole PFC or DCDC stage, the UCC5881-Q1 supports hard-switching SiC at 100 kHz to 500 kHz without thermal derating.
Recommandé
DC Fast Charging Station
The UCC5881-Q1 is suited for 350 kW DC fast-charging stations where IGBT or SiC stacks convert 800 V grid-tied DC to vehicle battery voltage. Its shunt-resistor over-current detection and PTC/NTC over-temperature inputs feed the integrated 10-bit ADC, providing redundant fault channels required for ASIL-D power-conversion systems. Two-level soft turn-off protects modules from short-circuit avalanche stress. Placed per phase-leg, the UCC5881-Q1 enables parallel-module operation with synchronized fault response, a key requirement for high-power charger stacks.
Recommandé
Solar String Inverter
In 1500 V PV string inverters the UCC5881-Q1 drives IGBT modules at high dV/dt with reinforced 5000 Vrms isolation, comfortably exceeding the 1500 Vpk bus-to-ground requirement. The SPI-programmable DESAT thresholds can be retuned in firmware to support different IGBT generations, simplifying BOM consolidation across product variants. Placed on each half-bridge the gate driver delivers 20 A peak current enabling MHz-class switching that shrinks magnetics. Its AEC-Q100 grade adds reliability margin in outdoor cabinets where temperature swings are extreme.
Recommandé
Industrial Servo Drive
Industrial servo drives use the UCC5881-Q1 to drive 600 V to 1200 V IGBT modules in three-phase inverter stages powering servo motors. The DESAT-based short-circuit protection with selectable blanking time matches a wide range of IGBT modules from multiple vendors, simplifying multi-CSK sourcing. Its 10-bit ADC back-channels motor phase current and DC-link voltage telemetry directly to the MCU, reducing external sensor count. Placed in a three-phase bridge the UCC5881-Q1 supports hard-switching at 20 kHz without thermal limitations, enabling compact servo packaging.
Recommandé
Energy Storage System (ESS) Bidirectional DC-DC
Bidirectional DC-DC converters in grid-tied battery energy storage systems use the UCC5881-Q1 to drive SiC MOSFET half-bridges connecting 800 V battery racks to 1500 V DC links. The integrated ADC and ASIL-compliant diagnostics support ASIL-D-grade ESS systems required by IEC 61508 and UL 9540A. Two-level soft turn-off prevents avalanche failure during short-circuit events, protecting expensive SiC modules. Placed on the high-voltage side of the DC-DC, the UCC5881-Q1 enables bidirectional power flow with high efficiency at 100 kHz switching frequencies.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour UCC5881-Q1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | UCC5880QDFCRQ1 | UCC5871QDFCRQ1 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 32-SSOP (DFC) | 32-SSOP (DFC) - same | 32-SSOP (DFC) - same |
| Maximum Drive Current | 20 A | 20 A | 20 A |
| Integrated ADC | 10-bit | 10-bit | 10-bit (half the channels) |
| INT_COMM Fault Filter | Yes | No | No |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Principaux différenciateurs
- More DESAT configurability than predecessor (vs UCC5880QDFCRQ1)
- INT_COMM fault filter for SPI communication diagnostics (vs UCC5880QDFCRQ1)
- Doubled ADC channel count vs UCC5871-Q1 (vs UCC5871QDFCRQ1)
Notes de conception
The UCC5881-Q1 gate-drive loop (OUTH/OUTL to gate-emitter of SiC module, returning to GND2) must be minimized to below 5 nH to avoid ringing and partial-turn-on of SiC MOSFETs at 100+ V/ns dV/dt. Use a Kelvin connection between the driver GND2 and the SiC module source, with a 4-layer PCB and a dedicated gate-drive return plane directly beneath the driver. Place the 1 uF VCC2 bypass capacitor within 2 mm of the driver VCC2 pin and add a 100 nF HF bypass in parallel.
The DESAT leading-edge blanking time must be tuned for the specific SiC MOSFET or IGBT used. Too short, and the protection false-triggers on the Miller plateau turn-on spike; too long, and a real short circuit is not detected quickly enough to protect the module. The UCC5881-Q1's 14 selectable blanking settings via SPI enable per-module tuning. Always verify the DESAT threshold against worst-case short-circuit desaturation voltage at maximum Tj.
Estimated: at 50 kHz switching frequency with 20 A peak gate current and 50 percent utilization, the UCC5881-Q1's internal gate-driver stage dissipates roughly 0.5 W to 0.8 W. With a 32-SSOP thermal pad soldered to a 1 square inch 2 oz copper pour, theta_JA is approximately 35 C/W, resulting in a 28 C rise above ambient. For continuous full-current operation in sealed enclosures, augment with thermal vias and a bottom-side copper spreader to keep Tj below 125 C.
Isolate the SPI bus from the high-voltage domain using a reinforced digital isolator such as ISO7741. The UCC5881-Q1's SPI pins (SDI, SDO, SCLK, nCS, nFLT) are referenced to the primary low-voltage domain; routing them across the isolation barrier must use a 4 mm minimum clearance to meet IEC 60664-1 reinforced isolation creepage. Place the SPI isolator on the same primary-side PCB region as the MCU, and keep the secondary-side traces short to minimize antenna loops for radiated EMI.
Informations de conformité
AEC-Q100 qualified automotive grade. RoHS and REACH compliant per TI product page. Halogen-free status not explicitly stated.
