BA3899F

Standard ICs EL driver for portable sets BA3899F The BA3899F is an IC developed for EL drive applications. It uses a more compact interface than transformer systems, and is ideal for use in thin sets. Applications Pagers, electronic notebooks and other portable devices Features 1) Drive oscillation frequency can be set using external capacitance. 2) Equipped with standby control pin. Absolute maximum ratings (Ta = 25°C) Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Maximum applied voltage Symbol VCC Pd Topr Tstg VST Limits 8.0 450∗ – 10 ~ + 60 – 55 ~ + 125 8.0 Unit V mW °C °C V ∗ Reduced by 4.5mW for each increase in Ta of 1°C over 25°C. Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Symbol VCC Min. 1.0 Typ. 5.0 Max. 7.0 Unit V Block diagram SW1 8 SW2 7 VCC 6 STBY 5 STBY RSW2 OSC1 OSC2 1 GND 2 N.C. 3 C1 4 C2 1 Standard ICs BA3899F Pin descriptions Pin No. 1 2 Pin name GND N.C. I/O I — Pin voltage — — VCC Internal equivalent circuit — — GND pin Function — 1k 3 C1 I/O — C1 OSC1 oscillator circuit; external capacitor pin GND VCC 200Ω 4 C2 I/O — C2 OSC2 oscillator circuit; external capacitor pin GND 1k STBY 50k Standby control pin (HIGH state: standby cancelled) ᭺When applying resistance, etc. to the STBY pin, be careful not to exceed the threshold values. 5 STBY I 0 200k GND 6 VCC I — — VCC input pin VCC 50k 7 SW2 O — SW2 switching output pin X...