Número de pieza
HM7148
componentes Descripción
Other PDF
no available.
PDF
page
12 Pages
File Size
1.1 MB
Fabricante
Shenzhen Huazhimei Semiconductor Co., Ltd
HM7148 Hoja de datos - Shenzhen Huazhimei Semiconductor Co., Ltd
Shenzhen Huazhimei Semiconductor Co., Ltd
Overview
HM7148 is a three-stage switch dimming single-channel high-voltage linear constant current LED driver chip. HM7148 adopts linear constant current technology to set the driving current of the LED light string through an external resistor. It adopts a two-stage structure with flexible configuration and can adapt to the application requirements of various LED lamps from 3 to 18 watts. It adopts adaptive valley filling patented technology. It greatly improves the efficiency and linear adjustment rate of the power supply system. The maximum driving power of a single IC can be increased to 18W; HM7148 supports switch dimming. When the power switch is quickly turned off and on, HM7148 changes the LED in sequence. The driving current of the light string, the current ratio is 100%-50%-10%.
Features
◾ Output constant current setting 5~60mA
◾ Constant current accuracy deviation between chips <+/-4%
◾ With temperature compensation and overheating protection functions
◾ Input power linear adjustment rate<2%/10V
◾ PF value>0.5, can also be configured with high PF value
◾ Three-stage switch dimming 100%-50%-10%
◾ Peripheral circuit adjusts switch dimming switching time
◾ Simple wiring and low cost of power supply system
◾ ESOP8 package
Application areas
◾ LED fluorescent tube T5/T8 and other specifications
◾LED ceiling lamp, table lamp
◾LED bulbs, downlights
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