UCC21520 - 4A/6A Isolated Dual-Channel Gate Driver | TI
MPN: UCC21520 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for UCC21520 — 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:
UCC21520A
✅ Drop-In📋 Reference alternative (not in catalog)
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 →UCC21550
✅ Drop-In✓ In Stock
$1.25 / Unit
View Datasheet →ADUM4223ARWZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →ADUM4224ARWZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →ISO5852S
✅ Drop-In📋 Reference alternative (not in catalog)
UCC21520 Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Peak Source Current | 4 A |
| Peak Sink Current | 6 A |
| Isolation Voltage | 5700 Vrms |
| Propagation Delay | 19 ns |
| Pulse Width Distortion | 6 ns |
| VDD Range | 6.5 V to 25 V |
| Input Threshold | TTL/CMOS compatible |
| Common Mode Transient Immunity | 100 V/ns |
| Switching Frequency | Up to 5 MHz |
| Package | 16-SOIC (DW) |
| Operating Temperature | -40°C to +150°C (junction) |
| Disable Pin | Yes (DIS) |
| RoHS Status | Compliant |
| Isolation Technology | Capacitive coupling |
UCC21520 Pin Configuration
| Pin 1 | VCCI — Primary-side supply voltage |
| Pin 2 | GNDI — Primary-side ground |
| Pin 3 | INA — Input signal for channel A |
| Pin 4 | DIS — Disable pin (active high) |
| Pin 5 | INB — Input signal for channel B |
| Pin 6 | GNDI — Primary-side ground |
| Pin 7 | VCCI — Primary-side supply voltage |
| Pin 8 | NC — No connect |
| Pin 9 | VDDA — Secondary-side supply for channel A |
| Pin 10 | OUTA — Gate drive output for channel A |
| Pin 11 | GNDA — Secondary-side ground for channel A |
| Pin 12 | NC — No connect |
| Pin 13 | GNDB — Secondary-side ground for channel B |
| Pin 14 | OUTB — Gate drive output for channel B |
| Pin 15 | VDDB — Secondary-side supply for channel B |
| 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
UCC21520 is suitable for 6 applications: Isolated DC-DC Converters, Motor Drives, Solar Inverters, Electric Vehicle Charging, Server Power Supplies, Renewable Energy Systems.
Isolated DC-DC Converters
The UCC21520 is ideal for isolated DC-DC converters, providing robust gate drive for primary-side switches. Its 4A/6A peak current ensures fast switching, reducing losses. The 5.7-kVRMS isolation allows safe signal transfer across the isolation barrier, while the 19-ns propagation delay maintains tight regulation. The device's high CMTI (100 V/ns) prevents false triggering in noisy power stages, ensuring reliable operation in telecom and server power supplies.
Recommended
Motor Drives
In motor drive applications, the UCC21520 drives IGBTs and MOSFETs in three-phase inverters. Its high peak current (4A source, 6A sink) enables fast gate charging, minimizing switching losses and improving efficiency. The reinforced isolation (5.7-kVRMS) protects low-voltage control circuitry from high-voltage transients. With a wide VDD range (6.5V to 25V), it accommodates various gate drive voltages, making it versatile for industrial motor control.
Recommended
Solar Inverters
The UCC21520 is well-suited for solar inverters, where high isolation and fast switching are critical. It drives power switches in DC-AC conversion stages, with 5.7-kVRMS isolation ensuring safety in high-voltage systems. The 4A/6A peak current and 19-ns propagation delay enable efficient switching at high frequencies, improving MPPT efficiency. Its robust CMTI (100 V/ns) ensures stable operation in harsh electromagnetic environments.
Recommended
Electric Vehicle Charging
In EV charging systems, the UCC21520 provides reliable gate drive for high-power switches in AC-DC and DC-DC converters. Its reinforced isolation (5.7-kVRMS) meets safety requirements for automotive applications. The high peak current (4A/6A) ensures fast switching of SiC MOSFETs, reducing losses and improving efficiency. The wide operating temperature range (-40°C to +150°C) makes it suitable for under-hood environments.
Recommended
Server Power Supplies
The UCC21520 is used in server power supplies to drive MOSFETs in high-frequency switching converters. Its 4A/6A peak current and 19-ns propagation delay enable efficient operation at frequencies up to 5 MHz, reducing the size of magnetic components. The 5.7-kVRMS isolation provides safety isolation between primary and secondary sides, while the high CMTI ensures reliable operation in noisy data center environments.
Recommended
Renewable Energy Systems
The UCC21520 is ideal for renewable energy systems such as wind and solar power converters. Its high isolation voltage and fast switching capability enable efficient power conversion in grid-tied inverters. The device's robust design, including 100-V/ns CMTI and wide temperature range, ensures reliable operation in outdoor environments. The 4A/6A peak current supports driving large IGBT modules used in high-power converters.
Recommended
Recommended Products Summary
Engineering reference data for UCC21520 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | UCC21520A | UCC21521 | UCC21540 | ADUM4223 |
|---|---|---|---|---|---|
| Package | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (DW) | 16-SOIC (W) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Peak Source Current | 4 A | 4 A | 4 A | 4 A | 4 A |
| Peak Sink Current | 6 A | 6 A | 6 A | 6 A | 4 A |
| Isolation Voltage | 5700 Vrms | 5700 Vrms | 5700 Vrms | 5700 Vrms | 5000 Vrms |
| Propagation Delay | 19 ns | 19 ns | 19 ns | 19 ns | 50 ns |
| CMTI | 100 V/ns | 100 V/ns | 100 V/ns | 100 V/ns | 100 V/ns |
| VDD Range | 6.5V to 25V | 6.5V to 25V | 6.5V to 25V | 6.5V to 5.5V | 4.5V to 18V |
Key Differentiators
- Higher sink current (6A) compared to ADUM4223 (4A) (vs ADUM4223)
- Faster propagation delay (19ns) vs ADUM4223 (50ns) (vs ADUM4223)
- Wider VDD range (6.5V to 25V) vs UCC21540 (5.5V max) (vs UCC21540)
Design Notes
Place decoupling capacitors (0.1 µF and 10 µF) close to the VDD pins (VCCI, VDDA, VDDB) to ensure stable supply voltage during switching transients. Use low-ESR ceramic capacitors and minimize trace length to reduce parasitic inductance.
Keep the gate drive loop (OUTA/OUTB to the power switch gate and source) as short as possible to minimize parasitic inductance and ringing. Use a ground plane on the secondary side to reduce EMI and improve CMTI performance.
The UCC21520 can dissipate significant power at high switching frequencies. Ensure adequate copper area on the PCB for heat dissipation, especially in high-temperature environments. The junction temperature must not exceed 150°C.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified for standard version; automotive variant UCC21520-Q1 is available.
