LT3970HMS#TRPBF

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LT3970HMS#TRPBF

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Especificações

Atributo Valor
Package / Case Tape & Reel (TR),Cut Tape (CT)
Part Status Active
Function Step-Down
Output Configuration Positive
Topology Buck
Output Type Adjustable
Number of Outputs 1
Voltage - Input (Min) 4.2V
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 1.21V
Voltage - Output (Max) 25V
Current - Output 350mA
Frequency - Switching 200kHz ~ 2.25MHz
Synchronous Rectifier No
Operating Temperature -40°C ~ 150°C (TJ)
Mounting Type Surface Mount

Visão Geral

Description

LT3970HMS#TRPBF is Linear Technology’s high‑voltage, constant‑current LED driver/controller. It drives an external N‑channel MOSFET to regulate LED string current from a wide input (up to about 60V) with high efficiency. The LED current is set by a sense resistor; the device includes protections and features such as enable/disable, PWM dimming, soft‑start, overcurrent/overtemperature protection, and undervoltage lockout. The HMS suffix denotes the package type, and #TRPBF indicates Tape & Reel Pb‑free packaging. Typical applications include automotive and general lighting LED backlighting, display backlights, and signage powered from a wide supply. For exact pinout, electrical specs, dimming options, and layout guidelines, consult the LT3970 datasheet.

Features

Here are typical features for LT3970HMS#TRPBF:
- Dual synchronous buck controller with external N-channel MOSFETs
- Wide input range (suitable for automotive/industrial)
- High efficiency via synchronous rectification
- Current-mode control with programmable switching frequency
- Soft-start and output sequencing
- Independent channels with fault/power-good reporting
- Overcurrent/short-circuit protection and current limit
- Overvoltage protection and undervoltage lockout
- Thermal shutdown protection
- Enable input for power control
- External compensation for loop stability
- Pb-free, tape-and-reel packaging (HMS, TRPBF)
Note: exact pinout and specifications can vary by revision; referencing the official datasheet is recommended for precise details.

Pinout

- Pin count: 8 pins (MSOP package, HMS variant; TRPBF is tape-and-reel, lead-free).
- Function: LT3970HMS#TRPBF is an 8-pin constant-current LED driver controller (buck/boost) that uses an external MOSFET, inductor, and sense resistor to regulate LED current. It accepts VIN, provides a switch node (LX) to the external MOSFET/inductor, and uses FB to regulate the current. IADJ sets the current, while EN and DIM control enable and dimming. Ground is GND.

Manufacturer

Manufacturer: Analog Devices, Inc. (the Linear Technology brand).
Company type: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits.

Application

LT3970HMS#TRPBF is used in:
- High‑efficiency DC‑DC regulators (buck/boost) for point‑of‑load power
- LED driver/backlighting and display illumination
- Automotive and industrial power‑management systems
- Battery‑powered portable devices and charger front ends
- Telecom, data‑center, and other rail regulation applications

Package

Package: HMS — a 16-pin MSOP-style package (MSOP-16) with an exposed pad. Pb-free and supplied in Tape & Reel (TRPBF).

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