Part Number: NT50198
Function: 3-Channel Charge Pump Power IC
Package: QFN-16, TDFN-12, TDFN-16 Type
This is TFT-LCD 3-Channel Charge Pump Power IC.
The NT50198 is a high-performance step-up charge pump and inverter to generate two output voltages; it is including pumping controllers for positive and negative output voltage. The following content contains the detailed description and the information of component selection.
The positive charge-pump controller provides adjustable regulated output AVDD and fixed -1 ratio of AVEE to supply the TFT.
The NT-50198 can provide a suitable and stable voltage level to TFT LCD driver IC, and NT50198 can refer to PSYNC signal to switch from charge state to pump state and vice versa. This function can avoid state changing noise to interfere display quality. If the driver IC or baseband can not provide PSYNC, please connect PSYNC signal to GND pin for free-running mode (Internal frequency =125 KHz). […]
1. Charge pump x2 mode for positive AVDD and x-1 mode for negative AVEE .
2. Charge pump clock synchronized with PSYNC for benefit of low noise.
3. Positive and Negative regulated charge Pump with Diode free.
4. External Capacitor 5C or 7C only