The SM8142 is a transformer-less electroluminescent (EL) sheet lamp driver produced by Nippon Precision Circuits. It can drive sheets up to 30 cm2 in size. It employs a high-efficiency driver output circuit configuration to control power dissipation. It is available in ultra-small 8-pin SON (Small Outline Non-leaded) packages, making possible the construction of small, thin, low-power driver units.
The SM8142 is a transformer‑less EL sheet driver capable of driving sheets up to 30 cm in size. It uses a high‑efficiency output circuit, offers a noise‑less smooth drive waveform, and is available in ultra‑small 8‑pin SON and VSOP packages.
Key specifications include a 1.6 V to 5.5 V supply range, 200 Vp‑p maximum driver voltage, 31‑1000 Hz drive frequency, and typical current consumption of 0.3 mA. The device supports standby mode, stable temperature characteristics, and requires a minimum coil inductance of 0.22 mH.
| Supply voltage range | 1.6 V to 5.5 V |
|---|---|
| Operating temperature | -40 °C to 85 °C |
| Maximum EL driver voltage | 200 Vp‑p |
| CHY pin output voltage | 0.5 V to 120 V |
| LDR pin output voltage | 0.5 V to 120 V |
| Power dissipation (85 °C) | 100 mW |
| Minimum coil inductance | 0.22 mH |
| EL drive frequency range | 31 Hz to 1000 Hz |
| Typical current consumption (no load) | 0.3 mA |
| Stand‑by current | 1.0 mA |
| Package options | 8‑pin SON (SM8142AD, SM8142BD) and 8‑pin VSOP (SM8142AV, SM8142BY) |
The SM8142 operates from 1.6 V up to 5.5 V.
The driver can output up to 200 Vp‑p.
Typical current consumption is 0.3 mA (excluding coil current).
It is offered in 8‑pin SON (SM8142AD, SM8142BD) and 8‑pin VSOP (SM8142AV, SM8142BY) packages.