For the era of energy saving and carbon reduction, Light-Emitting Diode ( LED ) has become a widely used light source because of its excellent luminous efficiency and compact component volume, and the electro-optical conversion of LEDs. The efficiency is quite good, higher than fluorescent lamps, cold cathode tubes (CCFLs) or light bulbs, so the current trend is to replace these sources with LEDs. For example, modern LCD panels mostly replace LEDs with LEDs as backlights. LEDs have almost replaced CCFLs as backlights for LCD panels. Tongjia introduces backlight driver IC - LD7890 is mainly boost topology, which can drive 4 Channel LED light bar, 10V MOSFETDRV output voltage, high conversion efficiency, external 4 Channel current balance drive, constant current LED. Wide input voltage range of 9V ~ 28V, can cooperate with various power sources to drive LED to produce uniform brightness, external 4 Channel current balance drive, application is not limited to LED light bar drive current or voltage, only need to select the corresponding External components are all right. The LD7890 has built-in innovative patented technology to meet the specifications of the following system vendors. (1) For the IC Thermal problem required by the system, the IC Package temperature can be lower than the customer's specifications. (2) Flexible for 4 Channel LED light bar with the following drivers, parallel function for applications above 4 Channel LED light bar. (3) LED Short Protection Threshold is adjustable, flexible, only need to use the resistor is not limited by the controller process. (4) Single CH Fault detection, which can be used as single CH LED Open/Short protection. Other CHs maintain motion and use elasticity.
APM 120V smps power supply is widely used in automatic testing sector. The average conversion efficiency is 90%, the load regulation is low, which ensure stable output when the load is changing constantly. The programmable power supply supports standard SCPI communication protocol, which is convenient for user`s secondary development.
Some features of the adjustable power supply as below:
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