R1293K241A-E2 Nisshinbo

R1293K Series Multi Power Supply IC with Amplifier for LCD NO.EA-301-160107 OUTLINE The R1293K is a multi power supply IC dedicated for mid-size TFT LCD panels. The R1293K consists of a PWM control step-up DC/DC converter, an LDO regulator, a VCOM amplifier and six GAMMA amplifiers. The output noise can be reduced by SEL pin. (SEL pin: normal mode, SEL pin: low noise mode.) The MOSFET for step-up DC/DC converter is built-in and, low power operation is realized by standby mode. The package is 4mm square QFN(PLP)0404-32. FEATURES Step-up DC/DC converter part Input Voltage Range 2.2V to 5.5V (VIN DC pin) Adjustable Output Voltage Range with external resistors up to 16V Feedback Voltage 1.0V Feedback Voltage Accuracy 1.5% Adjustable Oscillator Frequency with external resistors for RT pin 300kHz to 1MHz Adjustable Phase compensation with external components Internal Soft Start Time TYP. 10ms Adjustable Soft Start Time with external capacitors for DTC pin Oscillator Maximum Duty Cycle Set with external resistors for DTC pin (Limit TYP. 90%) UVLO detector threshold TYP. 1.9V Internal 2A /16V capability Nch MOSFET Driver TYP. 0.2 Built-in Peak Current Limit Circuit Short Protection with timer latch function (Adjustable delay time with external capacitors for DELAY pin) LDO part Input Voltage Range 2.2V to 5.5V (VIN LDO pin) Output Voltage Range 1.8V to 2.5V (Selectable / 0.1V Step) Output Voltage Accuracy 1.0% Maximum Output Current Min. 350mA guaranteed Ripple Rejection TYP. 65db (Frequency = 1kHz) Built-in Fold-back Protection Circuit TYP. 70mA (Current at short mode) Buffer Amplifier part Input Voltage Range for Amplifiers 5V to 16V (VBUFF pin) Output Current Range for VCOM Amplifier -100mA to 100mA Output Current Range for GAMMA Amplifier -10mA to 10mA Others Built-in Thermal Shutdown Circuit Stand-by function by ENB pin Package QFN(PLP)0404-32 APPLICATIONS Power sources of the medium and small sized TFT LCD panels 1 R1293K NO.EA-301-160107 BLOCK DIAGRAM V IN DC LX ENB SEL UVLO Current GND Limit RT OSC PGND Output PWM Control Opt. DTC Maxduty V FB DELAY Vref Softstart Timer AMPOUT Thermal V BUFF Shutdown V IN LDO V O COM V O LDO LDO IN COM V BUFF GND V V O GM4 O GM1 IN IN GM4 GM1 VO GM5 VO GM2 IN GM2 IN GM5 O GM6 VO GM3 V IN GM3 IN GM6 GND R1293K Block Diagram 2