LT1931AES5#TRMPBF

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LT1931AES5#TRMPBF

IC REG CUK ADJ 1A TSOT23-5

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規格

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Function Step-Up/Step-Down
OutputConfiguration Negative
Topology Cuk
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 2.45V
Voltage-Input(Max) 16V
Voltage-Output(Min/Fixed) -1.255V
Voltage-Output(Max) -34V
Current-Output 1A (Switch)
Frequency-Switching 2.2MHz
SynchronousRectifier No
OperatingTemperature 0°C ~ 70°C (TA)
MountingType Surface Mount
Package/Case SOT-23-5 Thin, TSOT-23-5

概述

Description

LT1931AES5#TRMPBF is Linear Technology (now Analog Devices) part: a high-efficiency, switch-mode LED driver controller. It drives an external N-channel MOSFET to regulate current through an LED string from a low-voltage source (battery, USB, etc.), and can be wired as boost, buck, or buck-boost depending on external components.
Key points:
- Constant-current LED driver using sense resistor for regulation
- External MOSFET switching with feedback for precise LED current
- Protections: undervoltage lockout, overcurrent, thermal shutdown, open/short LED protection
- Supports PWM/dimming for brightness control
- Suitable for compact, battery-powered or automotive lighting applications
Suffix notes:
- AES5 indicates a specific device revision/package variant
- TRMPBF denotes tape-and-reel, RoHS-compliant/lead-free packaging
If you need exact electrical specs (input range, LED current, frequency) or a schematic example, I can summarize the datasheet details.

Features

LT1931AES5#TRMPBF features (concise):
- High-efficiency boost DC-DC converter with integrated switching element.
- Constant-current LED driver capability (external sense resistor sets LED current).
- Wide input voltage range suitable for battery sources and multiple cells.
- External feedback for easy output/current regulation; supports simple external networks.
- Enable/shutdown control, with soft-start for controlled startup.
- Fixed-frequency operation with protection features (overcurrent, thermal shutdown, and undervoltage lockout).
- Small 8-pin package with Pb-free, RoHS-compliant design; available in tape-and-reel (TR) form.
- Intended applications: LED backlighting and other boost-regulated, current-regulated loads.
Note: Exact numerical specs (voltages, currents, frequency) vary by variant; refer to the LT1931 datasheet for precise figures.

Package

MSOP-8 (8-pin) package in Pb-free, Tape-and-Reel (TR) packaging.

Pinout

8 pins (AES5 package). It is a high‑voltage boost DC–DC converter used as an LED driver: it boosts input voltage to drive a LED string and regulates LED current via a feedback pin, with an enable input. The switching node (LX) connects to the external inductor/diode network, while VIN and GND supply the part.

Manufacturer

Manufacturer: Analog Devices, Inc. (the LT prefix denotes Linear Technology; Linear Technology was acquired by Analog Devices in 2017).
What kind of company: A global semiconductor company that designs, manufactures, and markets analog, mixed-signal, and power-management integrated circuits.

Application

Applications of LT1931AES5#TRMPBF:
- High-efficiency LED drivers from low-voltage supplies (constant LED current)
- White-LED backlighting for LCDs and displays
- LED flash/torch drivers for portable devices and cameras
- Portable electronics illumination and lanterns
- Solar-powered LED lighting
- Automotive and industrial lighting applications
- Any compact boost regulator needing simple current-regulated LED drive

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