UCC21550Q-Q1 - 4A/6A Isolated Dual Gate Driver | TI
MPN: UCC21550Q-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.6 | $3.60 |
| 10 | $3.25 | $32.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
Drop-in alternatives for UCC21550Q-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
UCC21540QDWKRQ1
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View Datasheet →UCC21520Q-Q1
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View Datasheet →UCC21521Q-Q1
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View Datasheet →UCC21530Q-Q1
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View Datasheet →UCC21550Q-Q1 Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature | -40C to +150C |
| Package | 16-SOIC (DW) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Disable Function | Yes |
| RoHS Status | Compliant |
| Supply Voltage | [DATA_NEEDED: VDD range] |
UCC21550Q-Q1 Pin Configuration
| Pin 1 | VCCI — Input-side supply voltage |
| Pin 2 | GND — Input-side ground |
| Pin 3 | INH — Input A (high-side channel) |
| Pin 4 | DT — Dead-time programming resistor pin |
| Pin 5 | INL — Input B (low-side channel) |
| Pin 6 | DIS — Disable input |
| Pin 8 | VDDA — Output A supply |
| Pin 9 | OUTA — Output A gate drive |
| Pin 10 | VSSA — Output A return (switching node for high-side) |
| Pin 12 | VDDB — Output B supply |
| Pin 13 | OUTB — Output B gate drive |
| Pin 16 | VSSB — Output B return (ground for low-side) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
UCC21550Q-Q1 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for UCC21550Q-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC21540QDWKRQ1 | UCC21520Q-Q1 | UCC21521Q-Q1 | UCC21710-Q1 |
|---|---|---|---|---|---|
| Package | 16-SOIC (DW) | 16-SOIC (DW) - same | 16-SOIC (DW) - same | 16-SOIC (DW) - same | [DATA_NEEDED] |
| 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 |
| Programmable Dead Time | Yes (resistor) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| 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 |
Key Differentiators
- Integrated programmable dead time (vs UCC21540QDWKRQ1)
- Asymmetric 4A source / 6A sink drive (vs UCC21521Q-Q1)
- Automotive AEC-Q100 qualification (vs UCC21550 (standard))
Design Notes
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.
Compliance Information
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.
