仕様
| 属性 | 値 |
| Package / Case | Tube |
| Part Status | Obsolete |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Output Type | Adjustable |
| Number of Outputs | 3 |
| Voltage - Input (Min) | 3.2V |
| Voltage - Input (Max) | 36V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Max) | 36V |
| Current - Output | 2A, 1A |
| Frequency - Switching | 270kHz ~ 2.1MHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
概要
Description
LT3514IUFD is a Linear Technology (now Analog Devices) LED driver IC. It is designed to drive multiple LED strings from a single supply with constant current and high efficiency, suitable for LCD backlights, signage, and automotive lighting. Key ideas: programmable current per channel, dimming (often PWM), and protective features such as overcurrent/short-circuit and thermal shutdown. The IUFD suffix indicates a specific package/temperature variant; exact pinout, current ranges, input range, and external component requirements are found in the official datasheet. If you need precise specs (how many channels, per-channel current, dimming interface, and recommended external components), please consult the datasheet for LT3514IUFD.
Equivalent
Direct one-for-one equivalents to LT3514IUFD aren’t readily available. LT3514 is a multi-channel constant-current LED driver; for similar functionality, consider cross-referencing to:
- TI TLC5974/TLC5955 (multi-channel CC LED drivers)
- Maxim MAX1682x/MAX1685x family (boost CC LED drivers)
- ON Semiconductor NCP565/NCP5660 series
- Analog Devices LT3513/LT3515 family
Use Digi-Key or Mouser cross-reference tools for exact matches.
- TI TLC5974/TLC5955 (multi-channel CC LED drivers)
- Maxim MAX1682x/MAX1685x family (boost CC LED drivers)
- ON Semiconductor NCP565/NCP5660 series
- Analog Devices LT3513/LT3515 family
Use Digi-Key or Mouser cross-reference tools for exact matches.
Features
LT3514IUFD features (concise):
- Four constant-current LED sinks with independent/current-balanced regulation
- Internal high-efficiency switch-mode regulator (boost/buck-boost) to drive LEDs from a common supply
- Programmable LED current per channel (via external components) and current balancing
- Dimming: PWM dimming input plus analog/DC dimming capability
- Protection: open/short LED protection, over-current protection, thermal shutdown
- Undervoltage lockout and robust fault protection
- Wide input voltage range suitable for LED backlighting/automotive applications
- Compact 16-pin package (IUFD suffix) suitable for dense layouts
Note: Current-setting details and exact pinout depend on the specific application circuit per the datasheet.
- Four constant-current LED sinks with independent/current-balanced regulation
- Internal high-efficiency switch-mode regulator (boost/buck-boost) to drive LEDs from a common supply
- Programmable LED current per channel (via external components) and current balancing
- Dimming: PWM dimming input plus analog/DC dimming capability
- Protection: open/short LED protection, over-current protection, thermal shutdown
- Undervoltage lockout and robust fault protection
- Wide input voltage range suitable for LED backlighting/automotive applications
- Compact 16-pin package (IUFD suffix) suitable for dense layouts
Note: Current-setting details and exact pinout depend on the specific application circuit per the datasheet.
Pinout
- Pin count: 16 pins (MSOP-16/TSSOP-16 in the IUFD variant).
- Function: Quad constant-current LED driver with an integrated boost regulator; provides four current-sink outputs for LED strings with adjustable/set-current control.
- Function: Quad constant-current LED driver with an integrated boost regulator; provides four current-sink outputs for LED strings with adjustable/set-current control.
Manufacturer
- Manufacturer: Analog Devices, Inc. (ADI). The LT3514IUFD originates from Linear Technology, which ADI acquired.
- What kind of company: A US-based multinational semiconductor company that designs, manufactures, and markets analog, mixed-signal, and DSP integrated circuits (including power-management solutions, data converters, amplifiers, etc.).
- What kind of company: A US-based multinational semiconductor company that designs, manufactures, and markets analog, mixed-signal, and DSP integrated circuits (including power-management solutions, data converters, amplifiers, etc.).
Application
LT3514IUFD is a multi-channel, constant‑current LED driver IC. It supports boost/buck‑boost operation to drive several LED strings from a single supply. Typical applications:
- LCD/LED backlighting for displays and TVs
- Automotive lighting (interior/exterior, dashboards, DRLs)
- Architectural, signage and decorative lighting
- Battery-powered multi‑string LED lighting and flash applications
- General purpose multi‑string LED drive in power supplies
Key features enabling these: independent current regulation per channel, PWM/analog dimming, fault protection, and a minimal external parts count.
- LCD/LED backlighting for displays and TVs
- Automotive lighting (interior/exterior, dashboards, DRLs)
- Architectural, signage and decorative lighting
- Battery-powered multi‑string LED lighting and flash applications
- General purpose multi‑string LED drive in power supplies
Key features enabling these: independent current regulation per channel, PWM/analog dimming, fault protection, and a minimal external parts count.
Package
LT3514IUFD is available in a 16-lead Plastic MSOP package (MSOP-16).
