HOLTEK released series white LED driver ICHT7937

With the white LED cost reduction, white LED (WLED) is widely used in various fields, the development of HOLTEK semiconductor promising white LED, used for display backlight developed a series of white LED driver IC, the day before the launch of the HT7937 IC series is suitable for white LED driver.

HT7937 provides high output voltage, driving up to 5 series LED. Using series design, can make the current flowing through each LED the same, to achieve the same purpose for each LED brightness. The feedback voltage is 95mV, with 4.7 ohm of resistance is connected, you can set the current through LED is 20mA and the feedback voltage as low as 95mV, low power consumption makes the feedback resistance, boost conversion efficiency as high as 84%.

Built in over-voltage protection function, when the LED damage caused by the feedback path open circuit, the output voltage is limited to the protection voltage, to further protect the IC will not burn. HT7937 operates at 1.2MHz operating frequency, allowing the designer to use a small inductance capacitance value of the external components, reducing the external component of the area of PCB. With small package SOT26, suitable for all kinds of portable products, such as: mobile phones, digital cameras, music / multimedia players and other products.

Source: power system