BA9755S

Multimedia ICs High voltage controller for CRT displays BA9755S The BA9755S is an LSI chip with a chopper voltage controller designed to control the anode voltage of multiscan monitors and other CRTs. There are two internal high-precision power supplies, each with an output voltage precision of ±1%. Using a high-precision voltage detection resistor makes it possible to set anode voltage without adjustment. Other internal components include an output voltage error detector and an overcurrent detector, which detects overcurrent when the power is turned on. Applications CRT displays and HDTV products Features 1) Internal chopper voltage controller. 2) Two internal high-precision power supplies, each with an output voltage precision of ±1%. 3) Internal output voltage error detector. 4) Internal buffer circuit that directly drives power MOSFET for output drive. Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage 1 Applied voltage 2 Power dissipation Operating temperature Storage temperature Symbol VCC1 VCC2 Pd Topr Tstg Limits 18∗1 20∗2 600∗1 – 25 ~ + 75 – 55 ~ + 125 Unit V V mW °C °C ∗ ∗3 1 18pin ∗ 2 3pin Reduced by 6.0mW for each increase in Ta of 1°C over 25°C. Recommended operating voltage (Ta = 25°C) Parameter Applied voltage 1 Applied voltage 2 Symbol VCC1 VCC2 VCC2 м VCC1 Limits 11 ~ 13 11 ~ 16 Unit V V ∗ Used with condition 1 Multimedia ICs BA9755S Block diagram GND 1 GND Sig VCC 18 VCC PWMOUT 2 Buffer PVCC 3 Power VCC REF 9.0V REF 6.0V ...