M3802 –2 : EL LAMP DRIVER CONTROLLER ____________________________________________________________________________ Features • Single 3V battery operation • DC to AC conversion • Built-in RC oscillator • Built-in delay function • Three independent trigger inputs ALM (active low) makes EL display for 3 seconds delay TG (active high) makes EL display for 3 seconds delay FLSH (active high) makes EL steady on General Description The M3802 is a poly gate CMOS integrated circuit designed to drive an Electroluminescence Lamp (EL). Three types of triggering modes are provided. A 3-second delay counter is built-in by internal divider. The switching and EL driving frequency is decided by an internal RC oscillator. Absolute Maximum Ratings DC Supply Voltage Input Voltage Range Operating Ambient Temperature Storage Temperature -0.3V to +5.0V Vss-0.3V to Vdd+0.3V -10°C to 70°C -55°C to 125°C Electrical Characteristics (Vss=0V, Vdd=3.0V, Ta=25°C, unless otherwise specified.) Parameter Symbol Min. Typ. Max. IND Output Current I IND 1.0 1.5 2.5 Osc. frequency Focs 400 500 670 Bonding Pads Diagram Chip size 1,300 um x 1,050 ms , substrate connected to Vdd 1 Unit mA kHz Typical Application Circuits (Recommended values : Q1 Q2 = 2N5551 , D1 = 1N4148 , R1 = 10KΩ Ω, C1 = 0.01 - 0.1 uF , L1 = 3mH /21Ω Ω) 1) 3-second delay using Vdd trigger 3-second delay using Vss trigger Without delay using FLSH trigger 2 2) Without delay using power control (C1 removed, ALM connected to Vss) REV.3-00 (3 pages) 3