Datasheet Texas Instruments UC1844AL883B — Ficha de datos

FabricanteTexas Instruments
SerieUC1844A
Numero de parteUC1844AL883B
Datasheet Texas Instruments UC1844AL883B

Controlador PWM en modo actual 20-LCCC -55 a 125

Hojas de datos

UCx84xA Current-Mode PWM Controller datasheet
PDF, 3.2 Mb, Revisión: F, Archivo publicado: enero 6, 2017
Extracto del documento

Precios

Estado

Estado del ciclo de vidaActivo (Recomendado para nuevos diseños)
Disponibilidad de muestra del fabricanteNo

Embalaje

Pin20202020
Package TypeFKFKFKFK
Industry STD TermLCCCLCCCLCCCLCCC
JEDEC CodeS-CQCC-NS-CQCC-NS-CQCC-NS-CQCC-N
Package QTY1111
CarrierTUBETUBETUBETUBE
Device Marking5962-UC1844AL/883B8670407XA
Width (mm)8.898.898.898.89
Length (mm)8.898.898.898.89
Thickness (mm)1.831.831.831.83
Pitch (mm)1.271.271.271.27
Max Height (mm)2.032.032.032.03
Mechanical DataDescargarDescargarDescargarDescargar

Paramétricos

Control MethodCurrent
Duty Cycle(Max)50 %
Frequency(Max)500 kHz
Operating Temperature Range-55 to 125 C
Package GroupLCCC
Package Size: mm2:W x L20LCCC: 79 mm2: 8.89 x 8.89(LCCC) PKG
RatingMilitary
Special FeaturesError Amplifier,Multi-topology
TopologyBoost,Flyback,Forward
UVLO Thresholds On/Off16/10 V
Vin(Max)30 V
Vin(Min)10 V

Plan ecológico

RoHSSee ti.com

Notas de aplicación

  • DN-30 Programmable Electronic Circuit Breaker
    PDF, 164 Kb, Archivo publicado: sept 5, 1999
    This design note describes a programmable electronic circuit breaker that uses the UC3843A control IC to facilitate a high-speed turnoff following an overcurrent condition. This low-cost industry-standard IC contains the required protection features and drive capability in a single 8-pin device.
  • DN-29 UC3842A Family - Frequency Foldback Technique Provides Protection
    PDF, 51 Kb, Archivo publicado: sept 5, 1999
    Excessive power dissipation can occur in switch-mode power supplies during startup and overload conditions. Many sophisticated PWM controllers provide the means for protection against these problems; however simple low-cost controllers require additional circuitry. This design note describes a circuit that uses only one additional resistor and transistor to enhance the performance of the UC3842A
  • DN-26 UC3842A Low-Cost Start-up and Fault Protection Circuit
    PDF, 155 Kb, Archivo publicado: sept 5, 1999
    The UC1842/3/4/5 family of control ICs can implement off-line or DC-to-DC fixed-frequency current-mode control schemes with a minimal external parts count. This design note describes a circuit with low startup current (less than 0.5mA) MOSFET-compatible undervoltage lockout thresholds programmable restart-delay HICCUP fault protection auxiliary 5V precision reference and overvoltage/overtemper
  • DN-27 UC1842/UC1842A Family - Summary of Functional Differences
    PDF, 21 Kb, Archivo publicado: sept 5, 1999
    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 device has been improved for higher frequency off-line power supplies. This new A series of controllers UC1842A/43A/44A/45A is superior to its predecessors in startup current requirements
  • DN-40 The Effects of Oscillator Discharge Current Variations on Maximum Duty
    PDF, 39 Kb, Archivo publicado: sept 5, 1999
    This design note details programming frequency and maximum duty cycle using the UC3842 and UC3842-A PWM oscillator ICs. Simplified equations are used to develop obtainable ranges for parameters over IC tolerances.
  • DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802
    PDF, 42 Kb, Archivo publicado: sept 5, 1999
    The UCC3802 offers numerous advantages that allow the power supply design engineer to meet requirements for lower power for battery-operated equipment higher switching frequencies for reduced magnetics size higher levels of circuit integration for improved reliability and lower cost. The UCC3802 family of devices is pin-out compatible with the UC3842 and UC3842A families; however it is not plu

Linea modelo

Serie: UC1844A (5)

Clasificación del fabricante

  • Semiconductors > Space & High Reliability > Power Management Products > Offline and Isolated DC/DC Controller and Converter