Regulator ICs AC / DC converter unit BP5034A5 The BP5034A5 is an AC / DC converter that provides a direct current (5V) from commercial power supply (100V, AC), with a small number of external components required. Using this IC, a compact microcontroller-based device can be configured without a transformer. Applications Power supplies for vacuum cleaners, rice cookers, electric pots, steam irons, telephones, electric heaters, lighting equipment, gas leakage alarms, and sensors Features 1) Smaller and lighter than transformers. 2) Wide range of input voltage (80 120V, AC). 3) Few external components required. 4) Power supply board is resistant to impacts because a transformer is not used. 5) The hybrid IC allows easy assemblage of components. Absolute maximum ratings (Ta = 25C) Electrical characteristics (unless otherwise noted, Ta = 25C) 1 Regulator ICs BP5034A5 Measurement circuit ∗1 Pin 6 is the COMMON pin and is connected internally to pin 5. Use eitcher both, or one or the other, as the COMON pin. Keep open the other pins that are not used. Basic circuits 2 Regulator ICs Application example Example of a vacuum cleaner application The diode bridge, which draws out a zero-cross signal, BP5034A5 is not required if a zero-cross signal is not used. Example of a rice cooker application 3 Regulator ICs Selecting attached components (1) Diodes Use rectifier diodes with the following absolute maximum ratings: minimum peak reverse voltage is 400V, the mean rectifying current is more than 0.5V, and minimum peak forward surge current is 20A. For example, 1SR35-400A is recommended. (2) Input voltage smoothing capacitor When the capacitance of this capacitor is increased, the output voltage is stabilized but the start-up rush current is increased. The waveforms of rush currents for capacitance values of 3.3µF (Fig. 5) and 10µF (Fig. 7) are shown in Figs. 6 and 8, respectively. The recommended capacitance is plotted against the output current in Fig. 9. The capacitor must have a withstand voltage of at least 200V. Application circuit 1 (CIN = 3.3µF) Rush current waveform 4 BP5034A5 (3) Output voltage smoothing capacitor Use a capacitor with a small ESR. Specifically, a low-impedance capacitor for power supply switching is recommended. The capacitor’s ESR affects the output ripple voltage. Capacitor products are listed below for reference. Regulator ICs BP5034A5 Application circuit 2 (CIN = 10µF) Rush current waveform 5 Regulator ICs Operation notes (1) Output current should be reduced with increasing ambient temperature. (2) Pins 3 and 7 are internally connected. Use the IC with these pins OPEN. (3) Overcurrent and short-circuit load The overcurrent protection circuit limits the current to about 160mA with a curve shape of “inverted -L” in the voltage-current graph. The IC may be damaged if the duration of intermittent overcurrent flows of more than 100mA exceeds 1 minute in total at 25C. Be sure to take safety measures such as fusing if short-circuit loads or Conditons A R2 = 0 (Ω), C = 200pF Conditions B R2 = 1.5 (kΩ), C = 100pF Measurement circuit 6 BP5034A5 overcurrent is probable. Though a 0.5A continuous break fuse is recommended, careful selection should be made according to the loading condition. (4) Regulations governing electrical products A single IC (BP5034A5) unit is not subject to the Regulations on Electrical Appliances. An application for approval should be based on an assembled unit. (5) Surge tolerance Results of electrostatic breakdown tests are shown in Fig. 11. The test methods are based on EIAJ ED-4071 and C-111. Regulator ICs BP5034A5 (6) Pin noise voltage Results obtained by using the Measurement circuit of Fig. 13 are shown in Fig. 12. 7 Regulator ICs Electrical characteristic curves (Measurement circuit is Fig. 8) External dimensions (Units: mm) 8 BP5034A5