SI9114ADY-T1-E3

End of Life. Last Available Purchase Date is 31-Dec-2014 Si9114A Vishay Siliconix High-Frequency Switchmode Controller FEATURES 15- to 200-V Input Range Current-Mode Control Internal Start-Up Circuit Latched SHUTDOWN Soft-Start 1.8-MHz Error Amp DESCRIPTION The Si9114A is a BiC/DMOS current-mode pulse width modulation (PWM) controller IC for high-frequency dc/dc converters. Single-ended topologies (forward and flyback) can be implemented at frequencies up to 1 MHz. The oscillator has an internal divide-by-two that limits the duty ratio to 50%. An oscillator sync output allows converters to be synchronized in phase as well as in frequency, in a master/slave configuration. The high-voltage DMOS transistor allows the IC to interface directly to bus voltages up to 200 V. Other features include a 1.5% accurate voltage reference, 1.8-MHz (min) bandwidth error amplifier, shutdown logic control, soft-start and undervoltage lockout circuits. The output inverter can typically source 500 mA and sink 700 mA. Shoot-through current is all but eliminated to minimize supply current requirements. The Si9114A is available in both standard and lead (Pb)-free 14-pin plastic DIP and SOIC packages, and is specified over the industrial, D suffix (−40 C to 85 C) temperature range. FUNCTIONAL BLOCK DIAGRAM FB 5 CURRENT COMPENSATION SENSE 6 13 ROSC 8 SYNC 10 Error Amplifier NI 4 B2 − + COSC 9 OSC Out OSC Enable 2V VREF 3 + Ref Gen − − + R Q S 4.6 V + 20 A SS 12 DRIVER OUTPUT − 7 11 1.25 V −VIN −VIN VCC Substrate 20 A VCC +VIN 14 Q 2 SHUTDOWN R 1 − − − + Document Number: 70025 S-42044—Rev. E, 15-Nov-04 S + + 0.2 V Undervoltage Lockout 9.2 V www.vishay.com 1 Si9114A Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Voltages Referenced to −VIN VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 V +VIN (Note: VCC < +VIN + 0.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 V Logic Input (SHUTDOWN, SYNC) . . . . . . . . . . . . . . . . −0.3 V to VCC + 0.3 V Linear Inputs (FEEDBACK, SENSE, SOFT-START) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to VCC + 0.3 V HV Pre-Regulator Input Current (continuous) . . . . . . . . . . . . . . . . . . . . . 5 mA Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150_C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to 85_C Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C Power Dissipation (Package)a 14-Pin Plastic Dip (J Suffix)b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750 mW 14-Pin SOIC (Y Suffix)c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 mW Thermal Impedance (QJA) 14-Pin Plastic Dip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167_C/W 14-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140_C/W Notes a. Device mounted with all leads soldered or welded to PC board. b. Derate 6 mW/_C above 25_C. c. Derate 7.2 mW/_C above 25_C. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. RECOMMENDED OPERATING RANGE Voltages Referenced to −VIN ROSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 kW to 1 MW VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.5 V to 16.5 V COSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 pF to 200 pF +VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V to 200 V Linear Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VCC − 4 V fOSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 kHz to 2 MHz Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to VCC SPECIFICATIONS Test Conditions Unless Otherwise Specified Parameter Symbol Limits D Suffix −40 to 85_C Oscillator Disabled −VIN = 0 V, VCC = 10 V Mina Typb Maxa OSC Disabled, TA = 25_C 3.94 4.0 4.06 OSC Disabled Over Voltage and Temperature Rangesc 3.88 4.0 4.12 Unit Reference Output Voltage Short Circuit Current Load Regulation VR V ISREF VREF = −VIN −30 −5 mA DVR/DIR IREF = 0 to −1 mA 10 40 mV Oscillator Initial Accuracy fOSCd ROSC = 374 kW, COSC = 200 pF 90 100 110 ROSC = 70 kW, COSC = 200 pF 450 500 550 4 7 % 200 500 ppm/_C kHz Df/f ROSC = 70 kW, COSC = 200 pF Df/f = [f(16.5 V) − f(9.5 V)] / f(9.5 V) Temperature Coefficientc OSC TC −40 v TA v 85_C, fOSC = 100 kHz Sync Output Current (Master Mode) ISYNC(M) VROSC v 5 V Sync Output Current (Slave Mode) ISYNC(S) VROSC = VCC "1 "500 VFB = 5 V, NI = VREF