UCC27511A - 4A/8A Low-Side Gate Driver | Texas Instruments
N.º de pieza: UCC27511A ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.25 | $1,25 |
| 10 | $1.12 | $11,20 |
| 100 | $0.95 | $95,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.78 | $780,00 |
UCC27511A Descripción general
A low-side gate driver is a type of power management IC that amplifies control signals from a controller to efficiently switch a ground-referenced power transistor. It sits between the PWM controller and the gate of a MOSFET or IGBT, providing the high peak currents needed to charge and discharge the gate capacitance quickly. This reduces switching losses and improves efficiency in power converters. The UCC27511A belongs to the gate driver family, which is a subset of power management ICs essential for modern power electronics.
Key features include a 13-ns propagation delay, 4-A source and 8-A sink peak currents, and a 5-V UVLO (undervoltage lockout) with hysteresis. The split outputs allow independent control of rise and fall times, enabling designers to optimize switching performance and reduce EMI. The device also features a robust design that minimizes shoot-through current, enhancing reliability in noisy environments.
Technically, the UCC27511A uses a CMOS-based architecture that provides rail-to-rail output swing and high noise immunity. The input stage can handle 5-V logic signals directly, simplifying interface with microcontrollers and PWM controllers. The device is available in a SOT-23-6 package, which is compact and suitable for space-constrained designs.
Typical applications include switch-mode power supplies, DC-to-DC converters, and companion gate-driver circuits for power modules. Its high-speed performance makes it ideal for synchronous rectification, active clamping, and other high-frequency topologies.
When designing with the UCC27511A, ensure proper decoupling of the VDD pin with a 1-uF ceramic capacitor placed close to the device. The split outputs allow tuning of gate drive strength; use separate resistors on OUTH and OUTL to adjust rise and fall times independently.
Alternativas directas para UCC27511A — 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:
UCC27511
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
UCC27511AQDBVRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
UCC27531
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
1EDN7550
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
UCC27517
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
UCC27511A Valores máximos y características eléctricas
| Number of Channels | 1 |
| Peak Source Current | 4 A |
| Peak Sink Current | 8 A |
| Propagation Delay | 13 ns |
| Rango de tensión de entrada | 4.5 V to 18 V |
| UVLO Threshold | 5 V (typical) |
| Configuración de salida | Split outputs (OUTH, OUTL) |
| Input Logic Compatibility | 5 V |
| Rango de temperatura de funcionamiento | -40°C to +140°C |
| Encapsulado | SOT-23-6 |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Patilla de habilitación | Yes |
Configuración de pines de UCC27511A
| Pin 1 | IN — Input signal |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable (active high) |
| Pin 4 | OUTL — Low-side output (sink) |
| Pin 5 | OUTH — High-side output (source) |
| Pin 6 | VDD — Power supply |
Aplicaciones típicas
UCC27511A es adecuado para 6 aplicacións: Switch-Mode Power Supplies, DC-to-DC Converters, Companion Gate-Driver Circuits, Motor Drives, GaN Power Devices, Solar Inverters.
Switch-Mode Power Supplies
The UCC27511A is ideal for driving the power MOSFET in switch-mode power supplies (SMPS). Its 4-A source and 8-A sink currents enable fast switching, reducing switching losses and improving efficiency. The 13-ns propagation delay ensures precise timing, critical for synchronous rectification and active clamping. The wide input voltage range (4.5V to 18V) accommodates various control ICs, and the split outputs allow independent tuning of turn-on and turn-off speeds to optimize EMI and efficiency.
Recomendado
DC-to-DC Converters
In DC-to-DC converters, the UCC27511A drives the low-side MOSFET in buck, boost, and buck-boost topologies. Its high peak currents ensure rapid gate charging, minimizing dead time and reducing body diode conduction losses. The 5-V UVLO ensures reliable operation during startup, and the enable pin allows power sequencing in multi-rail systems. The compact SOT-23-6 package is ideal for space-constrained designs, and the 13-ns propagation delay supports high switching frequencies up to several MHz.
Recomendado
Companion Gate-Driver Circuits
The UCC27511A serves as a companion gate driver for power modules and discrete switches in various applications. It can be used to boost the drive capability of a PWM controller, providing the high peak currents needed for large gate capacitances. The split outputs allow independent control of rise and fall times, enabling designers to tailor switching behavior for specific applications. Its robust design minimizes shoot-through current, enhancing reliability in noisy industrial environments.
Recomendado
Motor Drives
The UCC27511A can be used in motor drive applications to drive the low-side MOSFETs in inverter stages. Its fast propagation delay and high peak currents enable efficient switching at high PWM frequencies, reducing losses and improving motor control accuracy. The enable pin allows for safe shutdown during fault conditions. The device's wide operating temperature range (-40°C to +140°C) makes it suitable for industrial motor drives operating in harsh environments.
Recomendado
GaN Power Devices
The UCC27511A is rated for driving GaN power devices, which require fast, high-current gate drive to minimize switching losses. Its 4-A source and 8-A sink currents provide the necessary charge for GaN gates, and the 13-ns propagation delay ensures precise timing. The split outputs allow independent control of turn-on and turn-off, which is critical for GaN devices to avoid overshoot and ringing. The device's low output impedance and rail-to-rail swing are well-suited for GaN's low threshold voltage.
Recomendado
Solar Inverters
In solar inverters, the UCC27511A drives the low-side MOSFETs in boost converters and inverter stages. Its high peak currents and fast switching reduce losses, improving overall system efficiency. The wide input voltage range allows operation from various control ICs, and the enable pin enables safe shutdown during grid faults. The device's robust design ensures reliable operation in outdoor environments with wide temperature variations.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para UCC27511A — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | UCC27511 | UCC27511AQDBVRQ1 | UCC27531 | 1EDN7550 |
|---|---|---|---|---|---|
| Package | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Infineon |
| Peak Source Current | 4 A | 4 A | 4 A | 4 A | 4 A |
| Peak Sink Current | 8 A | 8 A | 8 A | 8 A | 8 A |
Diferenciadores clave
- Enhanced noise immunity (frente a UCC27511)
- 5-V input handling (frente a UCC27511)
- Automotive grade option (frente a UCC27511A)
Notas de diseño
Place a 1-uF ceramic capacitor as close as possible to the VDD pin to ensure stable operation and minimize voltage dips during switching. Use a low-inductance ground connection to reduce ringing. The split outputs (OUTH and OUTL) allow independent gate resistors; use separate resistors to tune rise and fall times for optimal EMI and efficiency.
The UCC27511A in SOT-23-6 package has limited thermal dissipation capability. At high switching frequencies and large gate charges, power dissipation can be significant. Ensure adequate copper area on the PCB for heat sinking. For high-power applications, consider using a driver with a larger package or external heat management.
Do not exceed the absolute maximum supply voltage of 18V. The enable pin can handle 5V logic, but ensure the input signal does not exceed the VDD voltage. When driving GaN devices, pay attention to the gate loop inductance; keep the driver close to the transistor to minimize parasitic effects.
Información de cumplimiento
RoHS compliant per TI product page. AEC-Q100 qualified variant available (UCC27511AQDBVRQ1).
