LM5025A
Controlador PWM de 90 V con modo de tensión de pinza activa, FET de pinza de canal P o N y umbral CS
LM5025A
- Internal Start-Up Bias Regulator
- 3-A Compound Main Gate Driver
- Programmable Line Undervoltage Lockout (UVLO) With Adjustable Hysteresis
- Voltage Mode Control With Feedforward
- Adjustable Dual Mode Overcurrent Protection
- Programmable Overlap or Dead Time Between the Main and Active Clamp Outputs
- Volt × Second Clamp
- Programmable Soft Start
- Leading Edge Blanking
- Single Resistor Programmable Oscillator
- Oscillator UP and DOWN Sync Capability
- Precision 5-V Reference
- Thermal Shutdown
- Packages:
- 16-Pin TSSOP
- Thermally Enhanced 16-Pin WSON (5 mm × 5 mm)
The LM5025A is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025A are that the CS1 and CS2 current limit thresholds have been increased to 0.5 V, the internal CS2 filter discharge device has been disabled and no longer operates each clock cycle, and the internal VCC and VREF regulators continue to operate when the line UVLO pin is below threshold.
The LM5025A PWM controller contains all of the features necessary to implement power converters using the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided: the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The two internal compound gate drivers parallel both MOS and bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1 MHz and total PWM and current sense propagation delays less than 100 ns. The LM5025A includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft start, oscillator UP and DOWN sync capability, precision reference, and thermal shutdown.
Documentación técnica
Tipo | Título | Fecha | ||
---|---|---|---|---|
* | Data sheet | LM5025A Active Clamp Voltage Mode PWM Controller datasheet (Rev. F) | PDF | HTML | 18 ago 2016 |
Technical article | Excuse me for being a little forward... with my topology | PDF | HTML | 21 oct 2015 | |
User guide | LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide | 27 ene 2012 | ||
Application note | Operation and Benefits of Active-Clamp Forward Power Converters | 22 mar 2007 |
Diseño y desarrollo
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LM5025AEVAL — Controlador PWM con modo de tensión de pinza activa
The LM5025A evaluation board is designed to provide the design engineer with a fully functional power converter based on the Active Clamp Forward topology to evaluate the LM5025A controller. The evaluation board is provided in an industry standard half-brick footprint.
LM5025A Unencrypted PSpice Transient Model Package (Rev. A)
PMP4468 — Diseño de referencia de avance con fijación activa de 5 V/30 W, entrada de 18 V a 36 VCC
PMP4428 — Diseño de referencia de fuente de alimentación aislada de 5 V/6 A con entrada de 18 V a 40 V y perfi
Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
---|---|---|
TSSOP (PW) | 16 | Ultra Librarian |
WSON (NHQ) | 16 | Ultra Librarian |
Pedidos y calidad
- 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
- Lugar de fabricación
- Lugar de ensamblaje
Soporte y capacitación
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