High voltage EL lamp driver sp44003 circuit diagram

SP4403 is a high voltage EL lamp driver . Its input voltage is DC 1.8~6v, and its output is AC high voltage. It is specially used to drive high-voltage EL lamp driving circuits for backlighting such as LCDs and portable digital processors.

Features: SP4403 can provide a power supply voltage of more than 160 P, which is especially suitable for driving cold light lamps. It only needs to connect an external inductor of 470p H to generate high voltage, and an external resistor to adjust the frequency of the oscillator. The current in the shutdown state is less than 110hA. SP4403 includes a DC/ AC converter internally, which can generate an AC output voltage up to about 220Vp-p to drive EL lamps that require high-voltage power supply. SP4403 has 8-pin P SO IC and SOP. 8Two packaging forms.

Application scope: SP4403 can be widely used in PDAs, pagers, mobile phones and other handheld low-power portable products that need to be used in weak light situations and use LCD screens.

Application circuit: The typical application circuit of SP4403 is shown in the figure.