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Reguladores de conmutación CA/CC
Controladores de CA/CC

UC1844A

NO RECOMENDADO PARA NUEVOS DISEÑOS

Controlador PWM con modo de corriente

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UC1844A 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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UCC2801-EP ACTIVO PWM con modo de corriente BiCMOS de baja potencia de producto mejorado Enhanced product upgrade to BiCMOS

UC1844A

NO RECOMENDADO PARA NUEVOS DISEÑOS
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Detalles del producto

Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
Topology Boost, Flyback, Forward Control mode Current Features Error amplifier, Fixed frequency, Multi-topology Duty cycle (max) (%) 50
CDIP (JG) 8 64.032 mm² (— mm × — mm) LCCC (FK) 20 79.0321 mm² (— mm × — mm)
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer
  • Optimized for Off-Line and DC-DC Converters
  • Low Start-Up Current (< 0.5mA)
  • Trimmed Oscillator Discharge Current
  • Automatic Feedforward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double Pulse Suppression
  • High-Current Totem Pole Output
  • Internally-Trimmed Bandgap Reference
  • Up to 500kHz Operation
  • Create a Custom Design Using the UCx84xA With the WEBENCH Power Designer

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.

The UCx84xA family of control devices is a pin-for-pin compatible improved version of the UCx84x family. Providing the necessary features to control current-mode or switched-mode power supplies, this family of devices has many improved features: startup current is less than 0.5mA, oscillator discharge is trimmed to 8.3mA, and during UVLO, the output stage can sink at least 10mA at less than 1.2V for VCC over 5V.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos UCx84xA Current-Mode PWM Controller datasheet (Rev. H) PDF | HTML 11/10/2024
* SMD UC1844A SMD 5962-86704 21/06/2016

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