Quan Sheng Electronics: 8-channel touch chip QTC188A

8-channel capacitive touch buttons chip QTC188A Device Overview: QTC188A is an interference with the super, super waterproof 8-channel capacitive touch sensor chip, in different frequency switching power supply system, and non-isolated resistance work step-down power supply system and fully consistent sensitivity under the premise of appropriate sensitivity, splashing water overflow, flooding the touch panel will not lead to malfunction, even when water flooded into the film to be more than one sensor for normal touch operation, no need to increase the inductance in the filter case can go through more than 4KV group pulse interference electrical fast transient test, interference during normal touch operation, the sensitivity is not reduced, not drift, can also resist up to 5W walkie-talkie radio frequency interference, The system includes advanced auto-calibration feature sensitivity, automatic sensitivity compensation, work environment mutation suppression, to provide a flexible and easy way sensitivity adjustment, is widely ...... chip Features: ※ 3.0V ~ 5.5V wide voltage operating current of 1.2 ※ mA ~ 1.8mA ※ ESD> 6KV, EFT> 4KV meet the relevant industry standards ※ injection current up to 10V compliant EMC standards ※ stabilize after the power to complete initialization within 0.5S and start touching ※ with touch detection signal output timeout Forced off function to prevent the touch keys are locked ※ advanced software filtering algorithm significantly enhances the chip power supply ripple immunity ※ sensitive keys pressed down jitter time ≤80ms; release debounce time ≤40ms ※ super waterproof performance, even if the touch panel mist, the puddles to continue its normal operation ※ touch valid signal using BCD (8421) encoded output, and supports 6 fixed set of key combinations ※ protection with voltage drop, not because of the power supply during operation ※ After working environment (temperature \ humidity \ panel media, etc.) changes the voltage drop and malfunction ※ powerful radiation anti-jamming capability, up to 5W walkie-talkie near the sensing plate continuous, intermittent emission does not malfunction, the chip can quickly calibrate, ensure long time stability ※ sensitivity automatic real-time compensation algorithm, PCB LAYOUT occur due to the alignment between induction channel length \ thickness \ different capacitive coupling degree of sensitivity of each channel resulting in inconsistencies, the chip can automatically compensate to accurately consistent ※ using SOP -16L wide leg small package Scope: LCD LCD touch screen home appliances, kitchen appliances water dispenser, cooker hoods, electric water heaters and easy access to electronic products