The BA6820F, BA6822S and BA6822F are two-channel, 12-point LED drivers for VU-scale bar-level meters. The ICs are available in 22-pin SOP (BA6820F and BA6822F) and 22-pin shrink-DIP (BA6822S) packages, and use a dynamic-drive system that can drive two 12-point displays. The ICs have independent AC and DC inputs, and the AC input mode has a peak hold circuit (with cancel function). The ICs also feature a power-on mute, so steps to prevent erroneous LED lighting at power on are not required. The input resistance of the AC inputs is 3kΩ(Typ.) for the BA6820F and 0.3kΩ(Typ.) for the BA6822S/F.
Feature
1) Uses dynamic-drive system to display two 12-point channels. 22-pin SOP and 22-pin shrink DIP pack ages.
2) Independent AC and DC inputs provided (one input displays one channel). Switching function allows two-mode display.
3) Upper 8 points have peak hold function in AC mode (two seconds). A peak-hold cancel function is also provided.
4) A mute function is provided, and muting can be applied externally.
5) Power on mute function.
