AT1743

AT1743 2-Channel PWM Controller for LCD Display Features High-accuracy reference voltage circuit (±1%). Built-in short-circuit protection circuit. Built-in Undervoltage Lockout protection. Internal 2.5V Reference supply. Variable Dead time provides control over total Range. General Description The AT1743 is 2-channel PWM switching regulator controllers that contains an on-chip 2.5V reference, two error amplifier, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry and 2 common-emitter output. It is idea for step-up, step-down, and inverting converter. Applications LCD Display Portable equipment Block Diagram 2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C. Tel: 886-3-563-0878 WWW: http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: [email protected] 1 AT1743 2-Channel PWM Controller for LCD Display Pin Configuration Ordering Information Part number AT1743 Package TSSOP16 Marking AT1743P - Pin Description Pin No. Symbol I/O Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 CT RT NON1 INV1 FB1 DT1 OUT1 GND Vcc OUT2 DT2 FB2 INV2 NON2 SCP Vref --I I O I O --O I O I I -O External timing capacitor External timing resistor Positive input for error amplifier 1 Negative input for error amplifier 1 Error amplifier 1 output Output 1 dead time / soft start setting Output 1 Ground Power supply Output 2 Output 2 dead time / soft start setting Error amplifier 2 output Negative input for ...