- Published in issue 3/1999 on page 58
EL lamp driver Type IMP803:
High voltage on chip
EL (electroluminescent) lamps are used primarily for the background lighting required by liquidcrystal display panels used in much battery operated equipment where low current drain is a prime requirement. The IMP803 driver for such lamps contains the requisite basic circuits: a switch-mode power supply using a high-frequency oscillator and a high-voltage H-bridge output driver using a low-frequency oscillator. It can drive lamps of up to 30 nF (10 in2) to high brightness.