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UC2856-Q1

NO RECOMENDADO PARA NUEVOS DISEÑOS

Controlador PWM de 8 V a 40 V y hasta 1 MHz con modo de corriente para automoción

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UC2856-Q1 no se recomienda para nuevos diseños
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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

UC2856-Q1

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 Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Current Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Qualified for Automotive Applications
  • 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
  • ESD Protection
    • 4-kV Human-Body Model (HBM)
    • 500-V Charged-Device Model (CDM)
  • Qualified for Automotive Applications
  • 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
  • ESD Protection
    • 4-kV Human-Body Model (HBM)
    • 500-V Charged-Device Model (CDM)

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 (HBM) 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 (HBM) on all pins.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet Improved Current-Mode PWM Controller datasheet (Rev. B) 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