Inicio Gestión de la energía Controladores CA/CC y CC/CC (FET externo)

UC1856-SP

ACTIVO

Controlador PWM de grado espacial QMLV, entrada de 40 V, salida doble de 1.5 A y 1 MHz

Detalles del producto

Vin (max) (V) 40 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Rating Space Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
Vin (max) (V) 40 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward, Full bridge, Half bridge, Push pull Rating Space Features Error amplifier, Multi-topology, Soft start, Synchronization pin Duty cycle (max) (%) 50
CDIP (J) 16 135.3552 mm² 19.56 x 6.92 CFP (HKT) 16 72.136 mm² 10.16 x 7.1
  • Pin-for-Pin Compatible With the UC1846
  • 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 UC1846
  • 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 UC1856 is a high-performance version of the popular UC1846 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 TRI-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 improvement, 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 electrostatic discharge (ESD) protection on all pins.

The UC1856 is a high-performance version of the popular UC1846 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 TRI-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 improvement, 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 electrostatic discharge (ESD) protection on all pins.

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Documentación técnica

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Tipo Título Fecha
* Data sheet UC1856-SP Improved Current Mode PWM Controller datasheet 24 abr 2014
* SMD UC1856-SP SMD 5962-94530 08 jul 2016
Application brief DLA Approved Optimizations for QML Products (Rev. B) PDF | HTML 23 oct 2024
Selection guide TI Space Products (Rev. J) 12 feb 2024
More literature TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) 31 ago 2023
Application note QML flow, its importance, and obtaining lot information (Rev. C) 30 ago 2023
Application note Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) PDF | HTML 17 nov 2022
Application note Single-Event Effects Confidence Interval Calculations (Rev. A) PDF | HTML 19 oct 2022
Application brief Controlling Input Power for Present and Next-Generation Power Controllers PDF | HTML 14 dic 2020
Application note DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer 21 ago 2020
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E-book Radiation Handbook for Electronics (Rev. A) 21 may 2019

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Encapsulado Pines Símbolos CAD, huellas y modelos 3D
CDIP (J) 16 Ultra Librarian
CFP (HKT) 16 Ultra Librarian

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

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.

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