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Texas Instruments UCC21732QDWQ1
- Part No.:
- UCC21732QDWQ1
- Manufacturer:
- Texas Instruments
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC21732QDWQ1.pdf
- Description:
- DGTL ISO 5.7KV 1CH GT DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:808
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Product details
Overview
UCC21732QDWQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive reinforced isolated single-channel gate driver for SiC MOSFETs and IGBTs, delivering ±10A peak source/sink drive strength, 5.7kVRMS isolation, 150V/ns CMTI, and integrated isolated analog sensing with PWM output. It enables high-reliability traction inverter and on-board charger designs operating up to 2121Vpk DC bus voltage.
For engineers reviewing the UCC21732QDWQ1 datasheet, UCC21732QDWQ1 pinout, UCC21732QDWQ1 application, or UCC21732QDWQ1 equivalent, key selection criteria include reinforced isolation certification (VDE 0884-17, UL 1577), fast 270ns overcurrent response, split-output architecture, active Miller clamp support, and isolated temperature/voltage sensing capability via APWM.
Technical Context
The UCC21732QDWQ1 employs SiO₂ capacitive isolation with >8mm creepage/clearance, supporting 1.5kVRMS working voltage and 12.8kVPK surge immunity. Its dual-supply gate drive stage (VDD–VEE up to 33V) delivers low-impedance pull-up (≤2.5Ω) and pull-down (≤0.7Ω) paths optimized for fast SiC switching.
It integrates a fault-tolerant protection chain: OC detection with <120ns deglitch filtering, internal 2-level turn-off (9–10V threshold, 500–1000ns duration), external Miller clamp control (CLMPE), and open-drain FLT/RDY reporting. The isolated analog sensor (AIN→APWM) provides 10kHz bandwidth and 360–440kHz PWM output for NTC/PTC or DC-link voltage monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5.7kVRMS per UL1577; 8000VPK transient & 2121VPK repetitive peak per VDE 0884-17 - ensures reinforced insulation for 1200V+ SiC systems |
| Drive Strength | ±10A peak source/sink - supports fast turn-on/turn-off of high-Qg SiC MOSFETs and IGBTs with minimal Miller plateau time |
| Propagation Delay | 130ns max (tPDHL/tPDLH), 30ns max skew - enables precise timing control in multi-phase inverters with tight dead-time requirements |
| CMTI | ≥150V/ns - maintains signal integrity in high-dV/dt environments like motor drives and DC/DC converters |
| Overcurrent Response | 270ns typical tOCOFF + 530ns tOCFLT - enables sub-microsecond fault shutdown before device destruction |
| Operating Temp | –40°C to +125°C ambient (Grade 1); –40°C to +150°C junction - qualified for under-hood EV powertrain applications |
| Analog Sensing | AIN input range 0.6–4.5V → APWM output 360–440kHz, 7–91% duty cycle - replaces external ADC and isolator in thermal/voltage feedback loops |
Pinout & Package
SOIC-16 DW package (10.3mm × 7.5mm body, >8mm creepage/clearance), reinforced isolation barrier separating input (GND side) and output (COM side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Input logic supply | 3.0–5.5V rail powering input interface, UVLO, and digital logic; requires ≥1μF local decoupling to GND |
| IN+, IN– | Differential gate control inputs | CMOS-compatible inputs with 40ns noise rejection; enable robust operation in noisy automotive ECU environments |
| RST/EN | Fault reset & output enable | Active-low dual-function pin: enables/disables output stage and resets FLT after ≥1000ns low pulse |
| RDY | Power-good indicator | Open-drain output signaling valid VCC-GND and VDD-COM supplies; supports wired-OR fault monitoring |
| FLT | Fault alarm output | Open-drain active-low signal asserted on OC or short-circuit; synchronized with internal 2-level turn-off sequence |
| VDD, VEE, COM | Output-side power rails | VDD–VEE up to 33V; COM referenced to SiC source/IGBT emitter; requires ≥10μF bulk capacitance per rail |
| OUTH, OUTL | Split gate drive outputs | Independent high-side pull-up and low-side pull-down drivers enabling programmable gate slew rate and Miller immunity |
| CLMPE | External Miller clamp control | Drives gate of external MOSFET to actively clamp Miller region during turn-off, preventing false turn-on |
| OC | Overcurrent sense input | High-sensitivity analog input for DESAT, shunt, or SenseFET sensing; 0.7V threshold with 120ns deglitch filter |
| AIN, APWM | Isolated analog sensing I/O | AIN accepts 0.6–4.5V sensor voltage; APWM delivers proportional PWM output for isolated temperature or DC-link monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 5.7kVRMS (UL1577) and 8000VPK transient rating (VDE 0884-17) - meets ASIL-D functional safety requirements for traction inverters |
| Fast Overcurrent Protection | 270ns propagation delay from OC event to output disable - limits energy dissipation during short-circuit faults |
| Split Output Architecture | Independent OUTH and OUTL pins - allows asymmetric gate drive (e.g., fast turn-on, slow turn-off) to optimize EMI and switching loss |
| Integrated Analog Sensing | Isolated AIN-to-APWM conversion with 10kHz bandwidth - eliminates need for separate isolated ADC and reduces BOM count by 3–4 components |
| Active Miller Clamp Support | CLMPE pin with 0.25A peak source/0.37A sink capability - enables reliable external clamp implementation without additional level-shifting circuitry |
| Automotive Qualification | AEC-Q100 Grade 1 (–40°C to +125°C), HBM ±4kV / CDM ±1.5kV - validated for harsh automotive power electronics environments |
Applications
| Traction Inverter | On-Board Charger (OBC) |
|---|---|
|
Use Scenario: High-power SiC-based motor drive in battery electric vehicles requiring >200kW output and >10kHz switching. IC Role / Device Role / Timing Role: Isolated gate driver controlling upper/lower leg SiC MOSFETs in 3-phase bridge; manages dead-time, fault shutdown, and thermal monitoring. Use Value: ±10A drive strength and 130ns propagation delay ensure precise phase current control; integrated APWM reduces thermal sensor interface complexity by 60%. |
Use Scenario: Bidirectional AC/DC and DC/DC conversion in 11–22kW OBC systems with SiC power stages. IC Role / Device Role / Timing Role: Gate driver for totem-pole PFC and isolated DC/DC primary-side switches; coordinates soft-start, fault recovery, and voltage regulation feedback. Use Value: 2121Vpk isolation rating supports 800V+ battery architectures; isolated AIN/APWM enables direct DC-link voltage sensing without optocouplers. |
| DC/DC Converter for HEV/EV | High-Voltage Auxiliary Power Supply |
|
Use Scenario: 3.3–5kW isolated DC/DC converter stepping down 400–800V battery voltage to 12V/48V for vehicle subsystems. IC Role / Device Role / Timing Role: Primary-side gate driver for SiC half-bridge; implements synchronous rectification control, overvoltage protection, and thermal derating. Use Value: 150V/ns CMTI prevents false triggering in high-frequency resonant topologies; 2-level turn-off (9V threshold) limits di/dt during fault conditions. |
Use Scenario: Auxiliary power module supplying 12V/24V to ADAS, infotainment, and gateway ECUs from 400–800V main battery. IC Role / Device Role / Timing Role: Gate driver for high-side switch in non-isolated buck or flyback regulator; monitors input voltage and junction temperature for safe startup. Use Value: Integrated isolated sensing eliminates external voltage divider and isolation amplifier; RDY/FLT signals enable centralized power system health monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC5870-Q1 | Higher 25A peak drive, dual-channel, no integrated analog sensing; uses transformer-based isolation | Targeted at higher-power traction inverters requiring parallel FET driving; lacks APWM functionality | Select when >10A drive or dual-channel integration is required; not suitable for systems needing isolated analog sensing |
| Si827x series (Silicon Labs) | Lower 4A drive, 5kVRMS isolation, no integrated OC protection or analog sensing; CMOS-based capacitive isolation | Used in cost-sensitive industrial inverters; requires external fault detection and sensing circuitry | Select for non-automotive applications where AEC-Q100 qualification and advanced protection are not mandatory |
Compared with UCC5870-Q1 and Si827x, the UCC21732QDWQ1 uniquely combines automotive-grade reinforced isolation, ±10A drive, fast OC response, and integrated isolated analog sensing-enabling simplified, compact, and functionally safe SiC/IGBT gate drive in EV power systems.
Availability
UCC21732QDWQ1 is available at Aetrix Electronics and suitable for traction inverters, on-board chargers, and DC/DC converters requiring stable component supply, long-term automotive lifecycle support, and certified reinforced isolation.
Supply support for UCC21732QDWQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management ICs, with deep expertise in automotive electrification and functional safety.
The UCC21732QDWQ1 belongs to TI's automotive isolated gate driver product line, designed specifically for high-reliability SiC and IGBT power stages in electric vehicle traction, charging, and auxiliary power systems.
FAQ
What is the maximum DC bus voltage supported by the UCC21732QDWQ1?
The UCC21732QDWQ1 supports SiC MOSFETs and IGBTs operating up to 2121Vpk DC bus voltage, validated by its 2121VPK repetitive peak isolation rating (VIORM) per DIN EN IEC 60747-17. This enables direct use in 800V battery architectures with margin for transients and ripple.
Does the UCC21732QDWQ1 require external components for basic gate driving functionality?
Yes - the UCC21732QDWQ1 requires external decoupling capacitors: ≥1μF between VCC and GND, and ≥10μF each between VDD–COM and VEE–COM. It also needs pull-up/pull-down resistors on IN+/IN– if unused, and a small capacitor (e.g., 100pF) from AIN to COM for noise immunity. No external level shifters or isolation amplifiers are needed due to integrated features.
How does the isolated analog sensing (AIN→APWM) function in the UCC21732QDWQ1?
The UCC21732QDWQ1 converts analog voltage applied to AIN (0.6–4.5V, referenced to COM) into a proportional PWM signal on APWM (360–440kHz, 7–91% duty cycle). This enables isolated temperature sensing using NTC/PTC thermistors or DC-link voltage monitoring without external ADCs or digital isolators - reducing system size and cost.
What protection features are built into the UCC21732QDWQ1 for SiC/IGBT reliability?
The UCC21732QDWQ1 includes fast overcurrent detection (<120ns deglitch, 270ns response), internal 2-level turn-off (9–10V threshold, 500–1000ns duration), external active Miller clamp (CLMPE pin), input/output UVLO (12V VDD, 3V VCC), and 150V/ns CMTI. These features collectively prevent shoot-through, false turn-on, and thermal runaway in high-dV/dt SiC applications.
Is the UCC21732QDWQ1 pin-compatible with other TI isolated gate drivers?
No - the UCC21732QDWQ1 has a unique 16-pin SOIC-DW pinout optimized for its integrated analog sensing (AIN, APWM), dual-rail gate drive (OUTH, OUTL, CLMPE), and automotive fault reporting (FLT, RDY). It is not pin-compatible with UCC5870-Q1 (24-pin), UCC21520 (8-pin), or earlier UCC217xx variants; PCB layout must be designed specifically for UCC21732QDWQ1.
UCC21732QDWQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Technology:
- Capacitive Coupling
- Number of Channels:
- 1
- Voltage - Isolation:
- 5700Vrms
- Common Mode Transient Immunity (Min):
- 150V/ns
- Propagation Delay tpLH / tpHL (Max):
- 130ns, 130ns
- Pulse Width Distortion (Max):
- 30ns
- Rise / Fall Time (Typ):
- 28ns, 24ns (Max)
- Current - Output High, Low:
- 10A, 10A
- Current - Peak Output:
- 10A
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 13V ~ 33V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, TUV, UL, VDE
UCC21732QDWQ1 FAQ
1.How can I place an order for UCC21732QDWQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC21732QDWQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for UCC21732QDWQ1 reliable?
The price and inventory of UCC21732QDWQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC21732QDWQ1 is usually 5 days.
3.What payment methods are accepted for UCC21732QDWQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC21732QDWQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC21732QDWQ1?
UCC21732QDWQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC21732QDWQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for UCC21732QDWQ1?
For technical support, including UCC21732QDWQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC21732QDWQ1 requirements.
6.How does Aetrix verify that UCC21732QDWQ1 is sourced from the original manufacturer or authorized distributors?
All UCC21732QDWQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that UCC21732QDWQ1 meets industry standards.
7.What is the process for return or replacement of UCC21732QDWQ1?
All UCC21732QDWQ1 units undergo pre-shipment inspection (PSI). If there is an issue with UCC21732QDWQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The UCC21732QDWQ1 part is unused and in its original packaging.
Return procedure for UCC21732QDWQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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