IS31BL3508A中文资料A boost converter featuring an integrated MOSFET switch designed for driving series strings of LED or other device数据手册Lumissil规格书

描述 Description

IS31BL3508A is a boost converter featuring an integrated MOSFET switch designed for driving series strings of LED or other device. Input operating voltage range is 2.7V~5.5V. The device regulates the LED load current is set using an external, low value sensing resistor. The device adjusts the PWM duty cycle of the switch to maintain the voltage at the FB pin at a value of 0.3V.

The IS31BL3508A operates at a constant switching frequency of 1.0MHz to allow for small component size. IS31BL3508A features an over voltage shutdown pin which prevents the output voltage from exceeding 38V (typ.) in the case of an open circuit condition.

The device is offered in a TSOT-23-6 and SOT-23-6 package and a temperature rating from -40°C ~ +85°C.

特性 Features

• Supply voltage: 2.7V~5.5V
• Built-in soft start
• Drive series strings of 10 LEDs or 3×8 LEDs
• PWM or DC voltage dimming
• Frequency of PWM is 500Hz ~ 500kHz
• 1.0MHz high speed switching frequency
• 0.3V feedback voltage
• Integrated high power MOSFET
• Over voltage protection
• -40°C ~ +85°C working temperature range
• TSOT-23-6 and SOT-23-6 package

应用 Application

• Small LCD Backlights
• Notebook PC
• GPS

简介

IS31BL3508A属于集成电路（IC）的LED驱动器。由制造生产的IS31BL3508ALED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。