Inicio Gestión de la energía AC/DC & DC/DC controllers (external FET)
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Gestión de la energía
AC/DC & DC/DC controllers (external FET)

UCC38C42

ACTIVO

Controlador PWM comercial, 20 V, modo corriente de baja potencia, 14.5 V/9 V UVLO, ciclo de trabajo

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UCC38C42

ACTIVO
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Detalles del producto

Vin (max) (V) 18 Operating temperature range (°C) 0 to 85 Control mode Current Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Duty cycle (max) (%) 100
Vin (max) (V) 18 Operating temperature range (°C) 0 to 85 Control mode Current Topology Boost, Buck, Flyback, Forward, SEPIC Rating Catalog Duty cycle (max) (%) 100
SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
  • Operating frequency: 1 MHz Maximum
  • 50-µA Startup Current, 100-µA Maximum
  • Low operating current: 2.3 mA (at fOSC = 52 kHz)
  • Fast, cycle-by-cycle overcurrent limiting: 35-ns
  • Peak driving current: ±1-A. Rail-to-rail output:
    • 25-ns rise time
    • 20-ns fall time
  • ±1% accurate 2.5-V error amplifier reference
  • Trimmed oscillator discharge current
  • Undervoltage lockout protections
  • VSSOP-8 package minimizes board space
  • Enhanced replacement for UCx84x and UCx84xA family with pin-to-pin compatibility
  • Operating frequency: 1 MHz Maximum
  • 50-µA Startup Current, 100-µA Maximum
  • Low operating current: 2.3 mA (at fOSC = 52 kHz)
  • Fast, cycle-by-cycle overcurrent limiting: 35-ns
  • Peak driving current: ±1-A. Rail-to-rail output:
    • 25-ns rise time
    • 20-ns fall time
  • ±1% accurate 2.5-V error amplifier reference
  • Trimmed oscillator discharge current
  • Undervoltage lockout protections
  • VSSOP-8 package minimizes board space

The UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency.

In addition, lower startup voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 125°C, and the UCC38C4x series is specified for operation from 0°C to 85°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCCx8C4x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35 ns for superior overload protection at the power switch, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

The UCCx8C4x family is offered in 8-pin VSSOP (DGK) and 8-pin SOIC (D) packages.

The UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency.

In addition, lower startup voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 125°C, and the UCC38C4x series is specified for operation from 0°C to 85°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCCx8C4x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35 ns for superior overload protection at the power switch, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

The UCCx8C4x family is offered in 8-pin VSSOP (DGK) and 8-pin SOIC (D) packages.
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Documentación técnica

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* Data sheet UCCx8C4x BiCMOS Low-Power Current-Mode PWM Controller datasheet (Rev. H) PDF | HTML 16 sep 2022
Functional safety information UCCx8C4x Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 12 sep 2022
Application note Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps (Rev. A) PDF | HTML 11 jun 2021
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 12 mar 2019
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
Application note UCC38C44 12-V Isolated Bias Supply (Rev. A) 09 oct 2008
User guide UCC38C42 30-W Synchronous Buck Converter Reference Design 04 feb 2003
User guide UCC3961/UCC38C43 Reference Design 19 nov 2002
Application note UCC38C42 25-W Forward Converter 06 sep 2002
Application note UCC38C42 Family of High-Speed BiCMOS Current-Mode PWM Controllers 07 feb 2002
More literature Seminar 300 Topic 8 - Switching Power Supply Design Review 15 feb 2001
More literature Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors 15 feb 2001
More literature Seminar 900 Topic 6 - High Power Factor Prereg Using SEPIC 15 feb 2001
Application note DN-30 Programmable Electronic Circuit Breaker 05 sep 1999
Application note DN-42A Design Considerations for Transitioning from UC3842 to the New UCC3802 05 sep 1999
Application note DN-62 Switching Power Supply Topology Voltage Mode vs. Current Mode 05 sep 1999
Application note U-111, Practical Considerations in Current Mode Power Supplies 05 sep 1999

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.

Placa de evaluación

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El UCC28C56EVM-066 es una fuente de alimentación auxiliar de retorno controlada por el lado primario (con devanado AUX) altamente eficiente para trenes de potencia de vehículos eléctricos (EV) y vehículos eléctricos híbridos (HEV). El diseño proporciona 15.2 VTYP y 40 W de salida para sistemas de (...)

Guía del usuario: PDF | HTML
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Modelo de simulación

UCC28C42 PSpice Transient Model

SLVM049.ZIP (101 KB) - PSpice Model
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Modelo de simulación

UCC28C42 TINA-TI Transient Start-up Reference Design

SLVM045.TSC (70 KB) - TINA-TI Reference Design
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Modelo de simulación

UCC28C42 TINA-TI Transient Start-up Spice Model

SLVM047.TSM (9 KB) - TINA-TI Spice Model
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Modelo de simulación

UCC28C42 TINA-TI Transient Steady State Reference Design

SLVM046.TSC (70 KB) - TINA-TI Reference Design
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Modelo de simulación

UCC28C42 TINA-TI Transient Steady State Spice Model

SLVM048.TSM (9 KB) - TINA-TI Spice Model
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Modelo de simulación

UCCx8C42 Unencrypted PSpice Transient Model

SLUM522.ZIP (4 KB) - PSpice Model
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Diseños de referencia

PMP30720 — Diseño de referencia de fuente de alimentación aislada con entrada ultra amplia (CC de 20 V a 375 V)

This reference design uses the UCC28C42 boost controller and the UCC28780 active-clamp flyback controller to generate an isolated output of 24 V at 3.5 A over an ultra-wide input voltage range of 20 V to 375 V. The design also uses the UCC24612 synchronous rectifier controller on the secondary (...)
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP10783 — Diseño de referencia de convertidor buck de CA/CC con entrada de 85 VCA - 318 VCA y salida de 15 V a

The PMP10783 reference design is an AC/DC buck converter. The input voltage range is 85VAC-318VAC, and has an output of 15V at 0.80A. This compact board design has an efficiency of greater than 80% at full load.
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP10833 — Diseño de referencia de convertidor buck CA-CC de 85-318 Vin, 15 Vout, 1 Aout

The PMP10833RevA reference design is a compact and thermally efficient design intended to step down a wide range of AC inputs.  This design incorporates the UCC28C42, a current-mode PWM controller, with controllable frequencies up to 1Mhz.
Test report: PDF
Esquema: PDF
Diseños de referencia

PMP10834 — Diseño de referencia de un convertidor Fly-Buck CA-CC de 85-265 Vin, 5 Vout, 1 Aout

The PMP10834RevA reference design is a compact and thermally efficient design intended to step down a wide range of AC inputs (85VAC to 265VAC). This non-isolated Flybuck design incorporates the UCC28C42 PWM with an optocoupler feedback to provide 1% output voltage regulation. All the circuit (...)
Test report: PDF
Esquema: PDF
Paquete Pasadores Descargar
SOIC (D) 8 Ver opciones
VSSOP (DGK) 8 Ver opciones
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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

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