TECHNICAL NOTE Large Current External FET Controller Type Switching Regulators Single-output Step-up, Negative Voltage, Step-down Switching Regulators (Controller type) BD9300F/BD9300FV Description The BD9300F/FV 1-channel DC/DC Step-up, step-down, and inverting converter controller. This IC has a wide input voltage range of 3.6 to 35 V, providing for a variety of applications. The pin assignment is similar to that of the BA9700, facilitating a space-saving application. Features 1) 1-channel PWM control DC/DC converter controller 2) High voltage input of 3.6 to 35 V 3) Reference voltage accuracy of 1% 4) Oscillation frequency variable in the range of 20 to 800 kHz 5) Built-in UVLO (Under Voltage Lock Out) circuit and SCP (Short Circuit Prevention) circuit 6) Current in standby mode: 0 A (typ.) 7) Switching external synchronization available (Slave operation) 8) SSOP-B14 Package (for BD9300FV) or SOP14 Package (for BD9300F) Applications . TV, power supply for liquid crystal display TV, and backlight . DSC, DVD, printer, DVD/DVD recorder, and other consumer products Input Input Input Step-up voltage Step-down output Inverting voltage voltage output output Step-up voltage application Inverting voltage application Step-down voltage application 2017. NovAbsolute maximum ratings(Ta=25C) Item Symbol Rating Unit Power supply voltage Vcc 36 V * Power dissipation Pd 400 mW Operating temperature Topr 40 to +85 C Storage temperature Tstg 55 to +125 C ** Output current Io 100 mA Output voltage Vo 36 V Maximum junction temperature Tjmax 125 C * Reduce by 4 mW/C over 25C, when mounted on a glass epoxy PCB of 70mmX70mmX1.6mm) ** Should not exceed Pd-value. Recommended operating range (Ta=25C) Limits Item Symbol Unit Min Typ Max Power supply voltage Vcc 3.6 12 35 V Output sink current IO 30 mA Output voltage VO 35 V Timing capacitance CT 33 1000 pF Timing resistance RT 5 100 k Oscillation frequency Fosc 20 800 kHz Electrical characteristics (Unless otherwise specified, Ta=25C, VCC=12V, CT=200pF, RT=20k ) Limits Item Symbol Unit Conditions T Min yp Max Reference voltage block Reference voltage VREF 2.475 2.500 2.525 V IREF=1mA Vcc=3.6 to 35V Input stability VDLI 1.5 20 mV IREF=1mA Load stability VDLD 0.5 20 mV IREF=0 ~ 1mA 1/2 reference voltage 1/2VREF 1.212 1.25 1.288 V Triangular wave oscillator block Oscillation frequency FOSC 165 220 275 kHz Charge mode threshold voltage + VOSC 1.95 V Discharge mode threshold voltage VOSC 1.45 V Frequency variation FDVO 1 % Vcc=3.6 to 35V Protection circuit block Threshold voltage VIT 1.5 1.8 2.1 V Charge current Iscp 7 11 A Rest period adjustment circuit block Upper limit threshold voltage VtH 2.05 V Duty Cycle=0% Lower limit threshold voltage VtL 1.35 V Duty Cycle=100% Input bias current Ibd 0.1 1 A DTC=1.5V Latch mode charge current Idtc 200 500 A DTC=0V Under voltage lock out block Threshold voltage VUT 2.8 V Not designed to be radiation-resistant. 2/16