LM3560 - Synchronous Boost Flash Driver w/ Dual 1A High Side Current Sources (2A Total Flash Current)

LM3560是TI德州仪器公司的一款相机闪光灯LED驱动器产品，LM3560是Synchronous Boost Flash Driver w/ Dual 1A High Side Current Sources (2A Total Flash Current)，本站介绍了LM3560的封装应用图解、特点和优点、功能等，并给出了与LM3560相关的TI元器件型号供参考。

LM3560 - Synchronous Boost Flash Driver w/ Dual 1A High Side Current Sources (2A Total Flash Current) - 相机闪光灯LED驱动器 - LED驱动器 - 德州仪器

产品描述

The LM3560 is a 2MHz fixed frequency synchronous boost converter with two 1000 mA constant current drivers for high-current white LEDs. The dual high-side current sources allow for grounded cathode LED operation and can be tied together for providing flash currents at up to 2A through a single LED. An adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency.

The LM3560 is controlled via an I2C-compatible interface. Features include: an internal 4-bit ADC to monitor the LED voltage, independent LED current control, a hardware flash enable allowing a logic input to trigger the flash pulse, dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions, and an integrated comparator designed to monitor an NTC thermistor and provide an interrupt to the LED current. Additionally, an active high HWEN input provides a hardware shutdown during system software failures.

The 2MHz switching frequency, over-voltage protection and adjustable current limit allow for the use of tiny, low-profile (1 µH and 2.2 µH) inductors and (10 µF) ceramic capacitors. The device is available in a ultra-small 16-bump (1.97mm × 1.97mm × 0.6mm) DSBGA package and operates over the −40°C to +85°C temperature range.

产品特性

Dual High-Side Current Sources Allow for Grounded Cathode LED Operation
Accurate and Programmable LED Current from 31.25mA to 2A
Independent LED Current Source Programmability
Up to 90% Efficient
Ultra-Small Solution Size: < 26 mm2
Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
4-Bit ADC for VLED Monitoring
LED Thermal Sensing and Current Scale-Back
Hardware Flash and Torch Enable
Dual Synchronization Inputs for RF Power Amplifier Pulse Events
LED and Output Disconnect During Shutdown
Open and Short LED Detection
400-kHz I2C-Compatible Interface
Active Low Hardware Reset
16-Bump (1.97mm × 1.97mm × 0.6mm) DSBGA

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