Advanced Analog Technology AAT11671
The AAT11671 provides a step-up PWM controller, negative high voltage LDO drivers, low dropout linear regulator, VCOM operational amplifier and one high voltage switch (up to 28V) for TFT LCD display. The PWM controller consists of an on-chip voltage reference, oscillator, error amplifier, current sense circuit, comparator, under-voltage lockout protection and soft-start control circuit. The thermal and power fault protection prevents excessive power damaging internal circuit.| Part No. | AAT11671 |
|---|---|
| Datasheet | AAT11671 Download |
| Manufacturer |  Advanced Analog Technology |
| Description | INTEGRATED TFT LCD POWER SOLUTION |
| Buy | Stock & Price |
FEATURES
Built In 2A (Max.), 0.2Ω Switching NMOS Negative LDO Driver Down to –14V/+20mA VCOM Operational Amplifier Up to 350mA LDO Reset Signal Output for TCOM 28V High Voltage Switch for VGH Adjustable Soft-Start Function 1.2MHz Fixed Switching Frequency Fault and Thermal Protection Low Dissipation Current : Typical 2.3mA In Operation VQFN24-4*4 Package AvailableGENERAL DESCRIPTION
RST pin will issue a reset signal to TCOM when VDD voltage is too low. The negative high voltage LDO drivers generate VOUT2 voltage (VGL) setting by external resistor divider. For the flicker compensation, VGH will be connected to VOUT3 when CTL is high and connected to ADJ when CTL goes low. The AAT11671 contains one operational amplifier capable of supplying 200mA to VCOM. With the minimal external components, the AAT11671 offers a simple and economical solution for TFT LCD power. TYPICAL APPLICATION PIN CONFIGURATION GND1 VDD1 INE VI+ VO 24 23 22 21 20 19 CTL VOUT3 VGH ADJ VREF IN2 1 2 3 4 5 6 7 OUT2 8...
