MP1010BEF-LF

MP1010B Cold Cathode Flourescent Lamp Driver Monolithic Power Systems CONFIDENTIAL INFORMATION General Description Features The MP1010B is a power solution IC that offers a true complete solution for driving a Cold Cathode Fluorescent Lamps (CCFL). This Power IC converts unregulated DC voltage to a nearly pure sine wave required to ignite and operate the CCFL. Based on proprietary power topology and control techniques it greatly increases the power conversion efficiency. The MP1010B is covered by patent numbers 6,633,138, 6,316,881, and 6,114,814. ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ Ordering Information Part Number∗ Package Temperature MP1010BEM TSSOP20 -20°C to +85°C MP1010BEF TSSOP20F -20°C to +85°C EV0037 MP1010BEM Evaluation Board Integrated power switches 6.0 to 23V variable supply voltage with regulated lamp current. Rated 12W power output at 12V input Open lamp regulation Current and Voltage feedback control Logic Level burst mode control Supports Open/Short Lamp protection Soft Start Output is short circuit protected High Energy Start Pulse Analog and Burst Mode Dimming Evaluation Board Available Applications ƒ ∗ For Tape & Reel use suffix - Z (e.g. MP1010BEM-Z) LCD Backlight inverter for notebook computers, Web Pads, GPS, desktop display, Portable DVD, Car Video display system. Figure 1: Typical Application Circuit C8 C2 R1 C7 C6 12 R4 11 BSTR 13 PGND 14 OUTR 15 COMP 16 FT 17 OL U1 18 FB 19 AGND 20 C5 C4 IN C3 R3 REF R2 HV T1 2 MP1010B 1 1 2 3 4 5 6 7 8 J1 BR T/B EN 9 BSTL C9 10 C12 5 4 3 C13 C14 GND PGND OUTL IN DR EN T/B BOS IL BR CN1 C1 R7 R8 C10 C11 R5 R6 2 C15 VBATT 1 FUSE MP1010B Rev 1.5 06/25/04 www.monolithicpower.com 1 MP1010B Cold Cathode Flourescent Lamp Driver Monolithic Power Systems CONFIDENTIAL INFORMATION Absolute Maximum Ratings Input Voltage (VIN) IL, FB Input Voltages (VIL, VFB) OL Input Voltage (VOL) Logic Input Voltages Power Dissipation Operating Frequency Junction Temperature Lead Temperature (Solder) Storage Temperature Recommended Operating Conditions 25V +/-6V -0.3V to 12V -0.3V to 6.8V 1.0W 150KHz 150°C 260°C –55°C to 150°C Input Voltage (VIN) Analog Brightness Voltage (VBR) Digital Brightness Voltage (VT/B) Enable (VEN) Operating Frequency (Typical) Ambient Operating Temperature 6V to 23V 0V to 1.9V 0V to 1.8V 0V to 5V 60KHz -20°C to +85°C Thermal Characteristics θJA 90° 40° Thermal Resistance (TSSOP) Thermal Resistance (TSSOPF) θJC 25° C/W 6° C/W Electrical Characteristics (Unless otherwise specified VIN=12V, TA=25°C) Parameters Symbol Condition Min Typ Max Units Output Voltage Reference Current Line Regulation Load Regulation Output Drivers VREF IREF IREF = 3mA 4.75 5.0 5.25 3.0 30 30 V mA mV mV Switch On Resistance Short Circuit Current Ton(min) Ton(min) Battery Supply Supply Current (quiescent) Supply Current (operating) R(ON) ISC 0.08 0.14 VCOMP=0V, VIN=23V VCOMP=0V, VIN=6V 0.11 4 435 1750 550 2100 Ω A ns ns VIN=23V 1.8 10 2.5 µA mA 400 130 5 1.86 50 mV mV % V mV Reference Voltage Brightness Control Sense full Brightness Sense full Dim Lamp Current regulation Burst Oscillator Peak Voltage Digital Brightness Offset Voltage Fault Detect Open Lamp Threshold Secondary Current Threshold Fault Mode COMP Current Shutdown Logic Fault Timer Threshold Fault Timer Sink Current Fault Timer Source Current Open Lamp Secondary Overload Enable Voltage Low Enable Voltage High 6.5V < VIN< 23V 0 < IREF< 3.0mA ICC(OFF) ICC(ON) VIL VIL (Note 1) VBR= 2.0V VBR= 0V 7V < VIN< 23V VBOS V(OS) T/B V(TH)OL V(TH)FB ICOMP 360 105 1.70 -50 0 1.2 475 VOL1.2V V(TH)FT 379 117 2 1.78 5 VOL>0, VFB