UCC21550 - 4A/6A Reinforced Isolated Gate Driver | TI
MPN: UCC21550 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.5 | $2.50 |
| 10 | $2.25 | $22.50 |
| 100 | $1.8 | $180.00 |
| 500 | $1.5 | $750.00 |
| 1,000 | $1.25 | $1,250.00 |
Drop-in alternatives for UCC21550 — 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:
UCC21520
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →UCC21521
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →UCC21530
✅ Drop-In✓ In Stock
$2.25 / Unit
View Datasheet →UCC21540
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →ZC21550
✅ Drop-In📋 Reference alternative (not in catalog)
UCC21550 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Peak Source Current | 4 A |
| Peak Sink Current | 6 A |
| Isolation Type | Capacitive |
| Isolation Voltage | 5000 Vrms |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Programmable Dead Time | Yes |
| Operating Temperature Range | -40°C to 150°C |
| Package | 16-SOIC (DW) |
| Mounting Type | Surface Mount |
| Supply Voltage (VCC) | [DATA_NEEDED: supply voltage range] |
| Output Configuration | 2 low-side, 2 high-side, or half-bridge |
| Common-Mode Transient Immunity | [DATA_NEEDED: CMTI] |
| RoHS Status | Compliant |
| AEC-Q100 Qualified | No (UCC21550-Q1 is qualified) |
UCC21550 Pin Configuration
| Pin 1 | VCCI — Input supply voltage |
| Pin 2 | GNDI — Input ground |
| Pin 3 | INA — Input signal for channel A |
| Pin 4 | INB — Input signal for channel B |
| Pin 5 | DIS — Disable pin (active high) |
| Pin 6 | DT — Dead time programming pin |
| Pin 7 | GNDI — Input ground |
| Pin 8 | VCCI — Input supply voltage |
| Pin 9 | VDDA — Output supply for channel A |
| Pin 10 | OUTA — Gate drive output for channel A |
| Pin 11 | GNDA — Output ground for channel A |
| Pin 12 | GNDB — Output ground for channel B |
| Pin 13 | OUTB — Gate drive output for channel B |
| Pin 14 | VDDB — Output supply for channel B |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
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
UCC21550 is suitable for 6 applications: Switch-Mode Power Supplies, Motor Drives, Solar Inverters, Electric Vehicle Charging, Industrial Power Supplies, Renewable Energy Systems.
Switch-Mode Power Supplies
The UCC21550's 4A source and 6A sink currents enable fast switching of power MOSFETs in SMPS, reducing switching losses and improving efficiency. Its programmable dead time prevents shoot-through in synchronous rectification stages, while the reinforced isolation ensures safe operation in offline power supplies. The wide temperature range supports operation in demanding industrial environments.
Recommended
Motor Drives
In motor drive applications, the UCC21550 provides the high peak currents needed to drive the gate capacitances of IGBTs and MOSFETs in inverter stages. The programmable dead time allows optimization for different motor types and speeds, reducing EMI and improving reliability. The reinforced isolation protects the control circuitry from high-voltage transients, making it suitable for industrial motor control.
Recommended
Solar Inverters
The UCC21550 is ideal for solar inverter applications where high-voltage isolation and fast switching are critical. Its 5000Vrms isolation ensures safe operation in grid-tied systems, while the 4A/6A drive currents enable efficient switching of SiC MOSFETs, reducing power losses. The wide temperature range supports outdoor installation conditions.
Recommended
Electric Vehicle Charging
In EV charging systems, the UCC21550 provides reliable gate drive for high-power SiC and IGBT modules. The reinforced isolation meets safety requirements for high-voltage battery systems, while the programmable dead time ensures efficient power conversion. The automotive-grade variant UCC21550-Q1 is available for AEC-Q100 compliance.
Recommended
Industrial Power Supplies
The UCC21550 is well-suited for industrial power supplies requiring high isolation and robust performance. Its wide temperature range and high drive currents ensure reliable operation in harsh environments. The capacitive isolation technology provides high CMTI, reducing noise coupling in noisy industrial settings.
Recommended
Renewable Energy Systems
For renewable energy systems like wind and solar, the UCC21550 offers the isolation and drive strength needed for high-power inverters. Its programmable dead time helps optimize efficiency in MPPT converters, while the reinforced isolation ensures safety in high-voltage DC links. The device's wide temperature range supports outdoor installations.
Recommended
Recommended Products Summary
Engineering reference data for UCC21550 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC21520 | UCC21521 | UCC21530 | UCC21540 | ZC21550 |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | SOP16 (300mil) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | ZhiCheng |
| Peak Source Current | 4 A | 4 A | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | 5 A |
| Peak Sink Current | 6 A | 6 A | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | 6 A |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | 5000 Vrms |
| Programmable Dead Time | Yes | No | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | Yes |
| Operating Temperature Range | -40°C to 150°C | -40°C to 125°C | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | -40°C to 125°C |
| Automotive Grade | No (Q1 version available) | No | No | No | No | No |
Key Differentiators
- Programmable dead time (vs UCC21520)
- Wider temperature range (vs UCC21520)
- Automotive grade option (vs ZC21550)
Design Notes
Place the UCC21550 as close as possible to the power transistors to minimize gate loop inductance. Use wide, short traces for the gate drive outputs (OUTA, OUTB) and ensure a solid ground plane for the input side. Maintain proper creepage and clearance distances between the input and output sides to preserve the 5000Vrms isolation rating.
Ensure adequate decoupling on the VCCI and VDDA/VDDB supplies. Use 0.1uF ceramic capacitors placed close to the pins, and a larger bulk capacitor (e.g., 10uF) on the output supplies to handle the peak currents during switching. The UVLO thresholds should be considered to ensure the driver operates within the specified supply range.
Do not exceed the absolute maximum ratings for the input and output supplies. The programmable dead time should be set based on the switching characteristics of the connected transistors to prevent shoot-through. Also, ensure the input signals (INA, INB) are properly referenced to GNDI and have sufficient pulse width to trigger the driver correctly.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualified version is UCC21550-Q1.
