LM51581
Convertidor elevador, de retorno y SEPIC con VIN amplia de 1.5 A, 85 V y 2.2 MHz y amplio espectro a
LM51581
- Suited for wide operating range for battery applications
- 3.2-V to 60-V input operating range (65-V abs max)
- 83-V maximum output (85-V abs max)
- Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
- Input transient protection up to 65 V
- Minimized battery drain
- Low shutdown current (IQ ≤ 2.6 µA)
- Low operating current (IQ ≤ 670 µA)
- Small solution size and low cost
- Maximum switching frequency up to 2.2 MHz
- 16-pin QFN package (3 mm × 3 mm)
- Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
- Accurate current limit (see the Device Comparison Table)
- EMI mitigation
- Selectable dual random spread spectrum
- Lead-less package
- Higher efficiency with low-power dissipation
- 133-mΩ RDSON switch
- Fast switching, small switching loss
- Avoid AM band interference and crosstalk
- Optional clock synchronization
- Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
- Integrated protection features
- Constant current limiting over input voltage
- Selectable hiccup mode overload protection
- Programmable line UVLO
- OVP protection
- Thermal shutdown
- Accurate ±1% accuracy feedback reference
- Adjustable soft start
- PGOOD indicator
- Create a custom design using the LM5158x with the WEBENCH Power Designer
The LM5158x device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158) or 85-V, 1.63-A (LM51581) power switch.
The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.
The BIAS pin operates up to 60 V (65-V absolute maximum). The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.
The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.
The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.
Documentación técnica
Tipo | Título | Fecha | ||
---|---|---|---|---|
* | Data sheet | LM5158x 2.2-MHz Wide VIN 85-V Output Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum datasheet | PDF | HTML | 20 oct 2021 |
Application note | How to Implement the Soft Start in a Flyback | PDF | HTML | 10 jul 2023 | |
Application note | How to Design an Isolated Flyback Converter Using LM5157x/LM5158x (Rev. A) | PDF | HTML | 16 mar 2023 | |
Application note | Basic Calculation of a Coupled Inductor SEPIC Power Stage | PDF | HTML | 13 mar 2023 | |
Application note | How to Design a Boost Converter Using LM5157x, LM5158x | PDF | HTML | 11 nov 2021 | |
Technical article | Lowering audible noise in automotive applications with TI’s DRSS technology | PDF | HTML | 18 mar 2021 |
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.
LM5157EVM-SEPIC — Módulo de evaluación LM5157 para SEPIC
El módulo de evaluación LM5157EVM-SEPIC muestra las características y el rendimiento del LM5157 como convertidor SEPIC no síncrono de entrada amplia. La configuración estándar está diseñada para proporcionar una salida regulada de 12 V a un máximo de 1 A a partir de una entrada de 4 V a 32 V y (...)
LM5158EVM-BST — Módulo de evaluación LM5158-Q1 de convertidor elevador
LM5158EVM-FLY — Módulo de evaluación LM5158-Q1 de convertidor de retorno
LM5158x-Q1 PSpice Boost Average Model (Encrypted)
LM5158x-Q1 PSpice Transient Model (Encrypted) (Rev. A)
SNVR511 — LM5157 and LM5158 Quickstart Calculator for Boost Regulator Design
Productos y hardware compatibles
Productos
Convertidores de CA/CC y CC/CC (FET integrado)
SNVR512 — LM5157 and LM5158 Quickstart Calculator for SEPIC Regulator Design
Productos y hardware compatibles
Productos
Convertidores de CA/CC y CC/CC (FET integrado)
Encapsulado | Pines | Símbolos CAD, huellas y modelos 3D |
---|---|---|
WQFN (RTE) | 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
Foros de TI E2E™ con asistencia técnica de los ingenieros de TI
El contenido lo proporcionan “tal como está” TI y los colaboradores de la comunidad y no constituye especificaciones de TI. Consulte los términos de uso.
Si tiene preguntas sobre la calidad, el paquete o el pedido de productos de TI, consulte el soporte de TI.