LT1938EDD#TRPBF

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LT1938EDD#TRPBF

IC REG BUCK ADJ 2.2A 10DFN

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規格

Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 3.6V
Voltage-Input(Max) 25V
Voltage-Output(Min/Fixed) 1.265V
Voltage-Output(Max) 20V
Current-Output 2.2A
Frequency-Switching 300kHz ~ 3MHz
SynchronousRectifier No
OperatingTemperature 0°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 10-WFDFN Exposed Pad

概述

Description

LT1938EDD#TRPBF is an 8‑pin, Pb‑free, Tape-and-Reel packaged LED driver/DC‑DC regulator from Linear Technology (now Analog Devices). It provides a high‑efficiency switching regulator with a constant‑current output for LEDs, accepts a wide input voltage (suitable for automotive, battery, or other rails), and uses an external sense resistor to set LED current. Key features typically include PWM dimming input, soft‑start, and protection options such as overcurrent, overvoltage, and thermal shutdown. Applications include automotive LED lighting (headlamps, tail lights), display backlighting, and LED flashers. For exact specs (input range, current setting, dimming range, efficiency) refer to the LT1938 datasheet. The EDD package denotes the specific physical package, and TRPBF indicates Tape & Reel Pb‑Free packaging.

Features

LT1938EDD#TRPBF features (summary):
- High-efficiency buck-boost LED driver for single/multiple LED strings
- Wide input voltage range suitable for automotive/battery use
- Constant-current regulation with external sense resistor
- PWM brightness dimming control (analog/digital dimming options)
- Adjustable LED current with accuracy and built‑in current limit
- Protection: short-circuit/overcurrent protection, thermal shutdown, reverse-battery protection
- Soft-start to reduce inrush and prevent LED turn-on surge
- Compact package (EDD family) with Pb-free TRPBF tape-and-reel delivery
Note: For exact electrical specs (voltages, currents, timing, pinout) please consult the LT1938 datasheet.

Package

It’s in an EDD package (16‑lead). The suffix TRPBF indicates Tape‑and‑Reel Pb‑Free packaging.

Pinout

- Pin count: 16 pins (16‑lead package, LT1938EDD in TRPBF tape-and-reel, lead-free)
- Function: Dual constant-current LED driver with wide input range (suitable for buck/boost operation). Drives two LED strings with regulated current using a single inductor architecture, programmable via sense resistors and feedback. Includes PWM dimming input, enable/shutdown, soft-start, and protections (overcurrent/overvoltage/thermal). Commonly used for automotive/LED backlighting applications.

Manufacturer

Analog Devices, Inc. (the company that now owns Linear Technology). Analog Devices is a multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits.

Application

LT1938EDD#TRPBF is a Linear Technology Analog Devices power-management IC used for high-efficiency DC-DC conversion and LED driving. Typical applications:
- LED backlighting and display illumination
- Portable/battery-powered devices
- Automotive and industrial power supplies
- Battery charging and power-path management
- Compact, high-efficiency step-up/step-down regulators

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