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UC2856Q

NO RECOMENDADO PARA NUEVOS DISEÑOS

Controlador PWM de 40 V, 1.5 A y 1 MHz con modo de corriente y -40 °C a 125 °C

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UC2856Q no se recomienda para nuevos diseños
Este producto sigue estando disponible para los clientes existentes. Los nuevos diseños deben considerar un producto alternativo.
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Funcionalidad similar a la del dispositivo comparado
UCC2808A-2 ACTIVO PWM de inserción-extracción con modo de corriente de baja potencia, transistor de descarga, UVLO de Upgraded to BiCMOS

UC2856Q

NO RECOMENDADO PARA NUEVOS DISEÑOS
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Detalles del producto

Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Pin-for-Pin Compatible With the UC2846
  • 65-ns Typical Delay From Shutdown to
    Outputs and 50-ns Typical Delay From
    Sync to Outputs
  • Improved Current Sense Amplifier With
    Reduced Noise Sensitivity
  • Differential Current Sense With 3-V
    Common Mode Range
  • Trimmed Oscillator Discharge Current for
    Accurate Deadband Control
  • Accurate 1-V Shutdown Threshold
  • High Current Dual Totem Pole
    Outputs (1.5-A peak)
  • TTL Compatible Oscillator SYNC Pin
    Thresholds
  • 4-kV ESD Protection
  • Pin-for-Pin Compatible With the UC2846
  • 65-ns Typical Delay From Shutdown to
    Outputs and 50-ns Typical Delay From
    Sync to Outputs
  • Improved Current Sense Amplifier With
    Reduced Noise Sensitivity
  • Differential Current Sense With 3-V
    Common Mode Range
  • Trimmed Oscillator Discharge Current for
    Accurate Deadband Control
  • Accurate 1-V Shutdown Threshold
  • High Current Dual Totem Pole
    Outputs (1.5-A peak)
  • TTL Compatible Oscillator SYNC Pin
    Thresholds
  • 4-kV ESD Protection

The UC2856 is a high performance version of the popular UC2846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5-A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a 3-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal noise caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier, results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1 V, 5% shutdown threshold; and 4 kV minimum ESD protection on all pins.

The UC2856 is a high performance version of the popular UC2846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5-A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a 3-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal noise caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier, results in enhanced noise immunity.

Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1 V, 5% shutdown threshold; and 4 kV minimum ESD protection on all pins.
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Documentación técnica

star =Principal documentación para este producto seleccionada por TI
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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet UC2856Q: Improved Current Mode PWM Controller datasheet (Rev. A) 26 may 2011

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje