LT8471EFE#PBF

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LT8471EFE#PBF

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規格

Package Tube
ProductStatus Active
Function Step-Up, Step-Down, Step-Up/Step-Down
OutputConfiguration Positive or Negative
Topology Buck, Boost, Flyback, SEPIC
OutputType Adjustable
NumberofOutputs 2
Voltage-Input(Min) 2.6V
Voltage-Input(Max) 50V
Voltage-Output(Min/Fixed) 2.6V
Voltage-Output(Max) 50V (Switch)
Current-Output 1.35A (Switch), 2.1A (Switch)
Frequency-Switching 100kHz ~ 2MHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 20-TSSOP (0.173, 4.40mm Width) Exposed Pad

概述

Description

LT8471EFE#PBF is a high-voltage buck-boost DC-DC controller from Linear Technology (now Analog Devices). It drives a switching converter (with external MOSFETs) to regulate an output over a wide input range, enabling buck, boost, or buck-boost operation. It’s commonly used in LED-driver applications and other power-supply designs that must maintain a stable output as input swings.
Key points:
- Wide-input, bidirectional regulation with current‑mode control for fast, stable response
- Protection: overcurrent/short-circuit, overvoltage, thermal shutdown, UVLO
- Supports dimming/remote sensing via control pins (as applicable to the design)
- Pb-free package (PBF suffix)
For exact electrical specs and pinout, consult the LT8471 datasheet and the specific variant’s datasheet in your package.

Features

Here are the key features of LT8471EFE#PBF (LED driver controller):
- Wide input range: 4.5V to 65V (robust for automotive transients)
- Buck-Boost constant-current LED driver (requires external MOSFET)
- Topology supports series LED strings; LED current set by external sense resistor
- Dimming options: PWM dimming input and analog/DC dimming capability
- Protection: overcurrent/short-circuit protection, overvoltage, undervoltage lockout, thermal shutdown
- Soft-start for controlled startup and good transient response
- Efficiency optimized for high-power LED applications; low quiescent current
- Primary-side regulation (PSR) option to simplify feedback (if used)
- Robust in harsh environments; suitable for automotive/industrial LED lighting
- Pb-free, RoHS-compliant package suitable for surface-mount designs
Note: LT8471EFE#PBF is a controller that typically requires external power MOSFET and inductor, and is designed for buck-boost LED driving with flexible dimming and protection features.

Package

LT8471EFE#PBF is a Pb-free version (PBF) packaged in a 16‑lead TSSOP package.

Pinout

- Pin count: 8 pins (8-pin package).
- Function: High-voltage switching controller for isolated power supplies (flyback/buck-boost topologies) with primary-side regulation; drives an external MOSFET and provides regulation and protection features (current limit, OVP, etc.).

Manufacturer

Analog Devices, Inc. (ADI). ADI is a U.S. multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing ICs, including power-management products. The LT8471 originated from Linear Technology, which ADI acquired in 2017.

Application

Applications of LT8471EFE#PBF:
- Battery charging and power-path management for Li‑ion/Li‑poly packs
- Wide-input buck/boost DC‑DC converters (isolated or nonisolated)
- Automotive and industrial power supplies
- Solar energy storage and charger systems
- Portable UPS/back-up power, telecom rugged adapters

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