UCC21540ADWR - 4A/6A Dual Isolated Gate Driver, 14-SOIC | TI
N.º de pieza: UCC21540ADWR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.1 | $31,00 |
| 100 | $2.65 | $265,00 |
| 500 | $2.3 | $1.150,00 |
| 1.000 | $1.95 | $1.950,00 |
UCC21540ADWR Descripción general
An isolated gate driver is a semiconductor device that provides galvanic isolation between a low-voltage control circuit (such as a microcontroller or DSP) and a high-voltage power stage. By using capacitive or magnetic isolation barriers, these drivers protect low-voltage logic from high-voltage transients while delivering the high peak currents required to rapidly switch power FET gates. The UCC21540ADWR belongs to the isolated gate driver category, a sub-family of power management ICs that sits between MCU/DSP controllers and the discrete power switches in converters, motor drives, and solar inverters.
Key features include 4A source / 6A sink peak drive current, 5.7kVrms basic isolation (per UL 1577), 1500Vrms working voltage, programmable dead time from 0 to several hundred nanoseconds via a single external resistor, and an active-low DISABLE pin for synchronized shutdown. The device supports up to 25V VDD supply for gate drive rails, and its dual-channel architecture permits independent control of high-side and low-side FETs in a half-bridge topology.
The UCC21540ADWR uses TI's capacitive isolation technology with an integrated transformer driver on-chip, providing robust common-mode transient immunity (CMTI) and eliminating the need for optocouplers. The internal architecture includes a PWM input stage, oscillator, isolation barrier, and output buffer stages optimized for fast propagation delay (typically under 40ns) and minimal channel-to-channel skew, both critical for high-frequency switch-mode power supply designs.
Typical applications include solar inverters, industrial motor drives, telecom brick converters, server and telecom power supplies, EV charging stations, and UPS systems. The wide VCC range also supports battery-powered portable equipment driving 12V to 48V bus rails.
When designing with this part, observe that the disable pin (pin 6) defaults to a defined logic level - leave it tied high if unused. Dead-time programming resistor selection must be verified against the actual switching frequency, and a small bypass capacitor (typically 1nF to 10nF) is recommended near VCC and VDD supplies.
This page synthesizes distributor pricing, drop-in alternatives (including same-family UCC21540DWK in the larger SOIC-16 DWK footprint), and practical design notes that complement the manufacturer datasheet.
Alternativas directas para UCC21540ADWR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
UCC21540ADWR-Q1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
UCC21541ADWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
UCC21542ADWR
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UCC21540ADWR Valores máximos y características eléctricas
| Función | Dual-channel isolated gate driver |
| Number of Channels | 2 |
| Peak Source Current | 4 A |
| Peak Sink Current | 6 A |
| Isolation Voltage (RMS) | 5.7 kVrms (per UL 1577) |
| Working Voltage | 1500 Vrms |
| VCC Supply Voltage | 3 V to 18 V |
| VDD Gate Drive Supply | up to 25 V |
| Dead-Time Control | Programmable via external resistor |
| Disable Pin | Yes (active-low) |
| Rango de temperatura de funcionamiento | -40 C to +125 C |
| Encapsulado | SOIC-14 (DW) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 2 |
| Estado RoHS | Compliant |
| Isolation Type | Reinforced capacitive coupling |
Configuración de pines de UCC21540ADWR
| Pin 1 | VDD — Output-side gate drive supply voltage |
| Pin 2 | GND2 — Output-side ground reference |
| Pin 3 | OUTA — Channel A gate drive output |
| Pin 4 | OUTB — Channel B gate drive output |
| Pin 5 | GND2 — Output-side ground reference |
| Pin 6 | DISABLE — Active-low shutdown for both channels |
| Pin 7 | DT — Dead-time programming resistor to GND |
| Pin 8 | INA — Channel A PWM input (input-side) |
| Pin 9 | INB — Channel B PWM input (input-side) |
| Pin 10 | GND1 — Input-side ground reference |
| Pin 11 | NC — Not connected (per datasheet) |
| Pin 12 | NC — Not connected (per datasheet) |
| Pin 13 | GND1 — Input-side ground reference |
| Pin 14 | VCC1 — Input-side logic supply (3V-18V) |
Aplicaciones típicas
UCC21540ADWR es adecuado para 6 aplicacións: Solar Inverters, Industrial Motor Drives, Telecom and Server PSUs, EV Charging Stations, Uninterruptible Power Supplies (UPS), Battery-Powered Portable Equipment.
Solar Inverters
The UCC21540ADWR fits solar inverter gate-drive stages because of its 5.7kVrms reinforced isolation and 4A/6A peak drive current per channel. In a 1500V DC bus string inverter, two UCC21540ADWRs drive the IGBT half-bridges of the DC-AC stage; the 5.7kVrms isolation comfortably handles 1500V DC working voltage per UL 1577, while the 6A sink current rapidly turns off high-Qg IGBTs to minimize switching losses. The programmable dead time, set via a single resistor to ~200-400ns, prevents shoot-through in the 600V/1200V IGBT modules typical of 5kW-50kW residential and commercial inverters.
Recomendado
Industrial Motor Drives
In industrial motor-drive applications, the UCC21540ADWR drives 600V/1200V IGBT half-bridges in 1kW-15kW servo and VFD systems. The dual-channel design enables a single driver IC to handle one phase leg (high-side + low-side), reducing BOM count vs single-channel optocouplers. Per TI UCC2154x datasheet, the device's CMTI performance supports the fast dV/dt of modern IGBT modules, while the 5.7kVrms isolation safely separates the MCU control board from the 480V AC rectified bus. The disable pin allows fast hardware shutdown on overcurrent faults.
Recomendado
Telecom and Server PSUs
For telecom bricks and 48V-input server PSUs, the UCC21540ADWR drives primary-side GaN FETs or MOSFET half-bridges up to 400kHz switching frequency. Its fast propagation delay (under 40 ns typical) and tight channel-to-channel matching support the high-frequency operation needed to shrink magnetics in 1kW-3kW LLC and PFC topologies. Per TI's product page, the part handles up to 18V VCC, allowing direct drive from 12V rails. The disable pin enables burst-mode operation for light-load efficiency compliance with 80 Plus Titanium targets.
Recomendado
EV Charging Stations
In Level 2 EV charging stations and onboard chargers, the UCC21540ADWR drives the IGBT or SiC MOSFET half-bridge that converts 400V-800V DC battery bus to AC grid. The 5.7kVrms isolation is required for safety separation between the 480V AC mains and the low-voltage controller, satisfying IEC 61851 and UL 2202 requirements. Two UCC21540ADWRs (one per channel pair) drive the totem-pole PFC and full-bridge stages. Programmable dead time via a single resistor simplifies firmware-free shoot-through protection across the 20-100kHz switching range typical of these chargers.
Recomendado
Uninterruptible Power Supplies (UPS)
The UCC21540ADWR is well-suited to UPS inverter stages converting 384V-480V DC battery to 230V AC output. Two driver ICs handle the full-bridge IGBT topology with reinforced isolation between control and battery domains. The 6A peak sink current rapidly turns off large IGBT modules (e.g., 600V/100A) used in 5kVA-20kVA online UPS systems. Per TI UCC2154x datasheet, the device's disable pin enables fast inverter shutdown on grid-loss events, while the wide 3V-18V VCC range permits direct interface to 3.3V MCU logic.
Recomendado
Battery-Powered Portable Equipment
Although the UCC21540ADWR's primary market is high-voltage systems, its 3V-18V VCC range and small SOIC-14 footprint also suit battery-powered portable equipment driving 12V-48V bus rails. For example, in a 48V battery-pack DC-DC converter for e-bikes or portable industrial tools, the UCC21540ADWR drives the half-bridge with 5.7kVrms isolation protecting the BMS MCU. The low quiescent current makes it acceptable for standby-mode battery drain targets, while the disable pin allows efficient sleep-mode shutdown when the load is removed.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para UCC21540ADWR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | UCC21540ADWR-Q1 | UCC21541ADWR | UCC21542ADWR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOIC-14 (DW) | SOIC-14 (DW) - same | SOIC-14 (DW) - same | SOIC-14 (DW) - same |
| Peak Source Current | 4 A | 4 A | 4 A | 4 A |
| Peak Sink Current | 6 A | 6 A | 6 A | 6 A |
| Isolation Voltage | 5.7 kVrms | 5.7 kVrms | 5.7 kVrms | 5.7 kVrms |
| VCC Supply | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V | 3 V to 18 V |
| Automotive Qualified | No | Yes (AEC-Q100) | No | No |
| Dead-Time Range | Programmable (0 to ~hundreds of ns) | Programmable (same) | Programmable (extended range) | Programmable (IGBT-optimized) |
Diferenciadores clave
- Higher sink current than typical 4A/4A competitors (frente a Si8273AB-IM)
- Single-resistor dead-time programming (frente a UCC21520 (older TI part))
- Automotive grade available in same footprint (frente a UCC21540ADWR-Q1)
Notas de diseño
Place a 1uF-10uF low-ESR ceramic bypass capacitor (X7R) directly between VCC1 (pin 14) and GND1 (pin 10/13) and another between VDD (pin 1) and GND2 (pin 2/5). The UCC21540ADWR can draw short bursts of 4A-6A from these rails during gate-charge transfer, and inadequate decoupling will cause VCC/VDD droop that can mis-trigger the under-voltage lockout. Estimated: at 1 MHz switching with 50 nC gate charge, average VDD current is 50 mA, but peak bursts during gate turn-on reach 4A for 10-20 ns.
Maintain at least 4 mm creepage between primary-side GND1 copper and secondary-side GND2 copper to preserve the 5.7 kVrms isolation rating and avoid PCB-level arcing in humid or polluted environments. Avoid running any primary-side traces (PWM inputs, VCC1) under the SOIC-14 package body; route only output-side OUTA/OUTB/GND2 beneath the IC. The exposed pad (if present on the package bottom) should be soldered to a floating copper island - never tie it to GND1 or GND2 as that defeats the isolation barrier.
Do not leave the DISABLE pin (pin 6) floating. Although the pin has an internal pull-up, floating operation can cause undefined behavior at power-up. Tie DISABLE high (to VCC1 via 10 kohm) if shutdown is not required, or drive it from an MCU GPIO. Also, ensure the DT resistor is never omitted (even a 0 ohm resistor) - leaving DT open causes undefined dead-time behavior and shoot-through risk in half-bridge configurations.
The UCC21540ADWR's SOIC-14 package dissipates gate-drive losses equal to Qg_total * VDD * fsw. Estimated: at 50 nC total gate charge, 12V VDD, and 500 kHz switching, dissipation is 0.3 W per channel (0.6 W total), well within SOIC-14's 100 C/W theta_JA capability. However, at high ambient temperatures (>85 C) or when driving very large IGBTs (Qg > 200 nC), verify with thermal camera that junction temperature stays below 125 C.
Información de cumplimiento
RoHS and REACH compliant per TI product page. Standard UCC21540ADWR is NOT AEC-Q100 qualified - choose UCC21540ADWR-Q1 for automotive. UL 1577 basic isolation 5.7kVrms per TI datasheet.
