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

UC1845A-EP

ACTIVO

Controlador PWM con modo de corriente de producto mejorado

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UC1845A-EP

ACTIVO
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Detalles del producto

Vin (max) (V) 25 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating HiRel Enhanced Product Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
Vin (max) (V) 25 Operating temperature range (°C) -55 to 125 Control mode Current Topology Boost, Flyback, Forward Rating HiRel Enhanced Product Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product Change Notification
  • Qualification Pedigree(1)
  • Optimized for Off-line and DC-to-DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500 kHz Operation
  • Low RO Error Amp

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.
  • Controlled Baseline
    • One Assembly/Test Site, One Fabrication Site
  • Extended Temperature Performance of –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources (DMS) Support
  • Enhanced Product Change Notification
  • Qualification Pedigree(1)
  • Optimized for Off-line and DC-to-DC Converters
  • Low Start Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feed Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Under-Voltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High Current Totem Pole Output
  • Internally Trimmed Bandgap Reference
  • 500 kHz Operation
  • Low RO Error Amp

(1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The UC1842A/3A/4A/5A family of control ICs is a pin-for-pin compatible improved version of the UC3842/3/4/5 family. Providing the necessary features to control current mode switched mode power supplies, this family has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During under voltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.
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Documentación técnica

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Tipo Título Fecha
* Data sheet Current-Mode PWM Controller. datasheet (Rev. D) 14 ene 2013
* Radiation & reliability report UC1845A-EP Reliability Report 21 jun 2018
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07 feb 2002
Application note DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit 05 sep 1999
Application note DN-27 UC1842/UC1842A Family - Summary of Functional Differences 05 sep 1999
Application note DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection 05 sep 1999
Application note DN-30 Programmable Electronic Circuit Breaker 05 sep 1999
Application note DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty 05 sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 sep 1999
Application note DN-65 Considerations in Powering BiCMOS ICs 05 sep 1999
Application note DN-89 Comparing the UC3842, UCC3802, and UCC3809 Primary Side PWM Controllers 05 sep 1999
Application note Modeling, Analysis and Compensation of the Current-Mode Converter 05 sep 1999
Application note U-100A UC3842/3/4/5 Provides Low-Cost Current-Mode Control 05 sep 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies 05 sep 1999

Diseño y desarrollo

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Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (D) 8 Ultra Librarian
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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

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