LED driver circuit based on HV9931

According to the Hubei Gedian Economic and Technological Development Zone, Sanan Optoelectronics' Mini/Micro LED chip industrialization project is expected to be put into production in March next year. This is my country's first large-scale micro-LED chip project, and its products are mainly supplied to Samsung, Huawe

1. Circuit Characteristics Description The RD-251 provides a single 350 mA constant current output at 12 V and 18 V LED string voltages. The output current can be reduced to 1% (3 mA) using a standard AC mains thyristor dimmer without causing instability or flicker in the LED load. The circuit is compatible wit

Introduction Due to the advantages of LED, such as environmental protection, long life and high luminous efficiency, it has been recognized by various countries as the next generation of ideal light source. However, there are still many technical bottlenecks for LED to eventually replace traditional light sources,

　　The LTC3219 is an inductorless, low noise, high efficiency LED driver that provides nine independently configurable current sources for the main, sub and RGB display/display devices, and can perform 64 levels of brightness adjustment control. These universal current sources can be digitally controlled for independen

The progress of constant current control technology of LED lighting driver power supply is mainly reflected in the following aspects: 1) The continuous simplification of chip peripheral control circuits, the primary side constant current technology (PSR) has become mature; 2) The constant current accuracy of the chip

1. Introduction Homemade LED electronic clocks can be seen in many electronic newspapers and magazines, but most of them need to reset the time and other parameters after power failure, which brings a lot of inconvenience to use. There are also backup batteries as backup power sources, but they are often large in si

Abstract: This reference design is a complete system design for automotive LED applications. The MAX15005 current-mode controller is used to boost the voltage of a standard lead-acid automotive battery to 21V for driving a string of automotive LEDs. The following provides a reference design for an automotive LED sy

0 Introduction The boost-type circuits currently used for white light driving mainly include inductive type DC-DC circuits and charge pump circuits. Inductive type DC-DC circuits have problems such as EMI, while charge pump circuits have a simple structure and low EMI, a