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| Regulator ICs AC / DC converter unit BP5038 The BP5038 is an AC / DC converter which can be used to supply 12V, 30mA DC output from a commercial power supply (100 V AC). Using this unit enables simple, easy drive of microcomputers, relays, LEDs, and many other electronic components without using a transformer. The most compact of all of the products in the BP5030 series of AC / DC converters, the BP5038 allows set PCBs to be kept compact and lightweight, with extremely few attachments. FApplications Power supply circuits for vacuum cleaners, electric carpets, electric rice cookers and hot water pots, irons, air conditioners, air purifiers, humidifiers, dehumidifiers, illumination devices and other small household appliances, as well as power supply circuits for gas, fire and smoke alarms, DC motors, sensors, and other similar devices FFeatures 1) Elimination of a transformer enables compact, lightweight power supply boards. 2) Wide input voltage range. (80 to 120Vrms for AC voltage conversion) 3) DC power supplies can be easily configured, with few attachments. FAbsolute maximum ratings (Ta = 25_C) 4) Compact, stand-alone 4-pin SIP package. 5) Since no transformer is used, the power supply board is less vulnerable to splitting or cracking from impact or shock. 6) Hybridization of the IC reduces the number of labor hours in the assembly process. FRecommended operating conditions (Ta = 25_C) 20 Regulator ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C) BP5038 FPin descriptions FMeasurement circuit 21 Regulator ICs FApplication example Example showing product used in electric carpet BP5038 FBasic power supply circuit Half wave rectification circuit Full wave rectification circuit 22 Regulator ICs FSelecting attached components (1) Diodes The rectifying diodes used should fulfill the following conditions. In the absolute maximum ratings, the reverse surge current should be 400V or higher, the average rectifying current should be 0.5A or higher, and the forward surge voltage should be 20A or higher. (2) Capacitor for input voltage smoothing A capacitor with a larger capacitance produces a more stable output voltage, but increases the surge current when the power supply is turned on. The capacitor should have a withstand resistance of at least 200V. BP5038 (3) Capacitor for output voltage smoothing This capacitor should have a low ESR. Capacitors designed for low-impedance switching power supplies are especially suitable. The ESR of the capacitor affects the output ripple voltage. Please refer to the table below for the names of products made by various manufacturers. FOperation notes (1) The output current needs to be reduced as the ambient temperature rises. (2) Lead pins should be securely soldered. If COMMON pins are not securely connected, or pins which are connected internally but which are not used are connected to other pins, irregular voltages could be produced, causing breakdowns and damage. (3) Excessive current and shorted loads The excessive current limit is a drooping model. At 25_C, if excessive current which exceeds the absolute maximum ratings is produced intermittently, or is produced continuously for a total of one minute or longer, the product is vulnerable to damage. If there is any danger of the load being shorted or excessive current being produced, always use a protective device such as a fuse. (4) Avoid subjecting this product to strong impact. (5) Regulations governing electrical products As a stand-alone product, this product is not subject to regulations governing electrical appliances. Please be aware, therefore, that applications must be submitted for sets and not for individual products. (6) Insulation This product is not insulated on the primary and secondary sides, and there is a danger of electrical shock if it is touched. (7) Connections with other devices Devices using this product should not be connected to other devices. If connected, insulation should be provided. 23 Regulator ICs FElectrical characteristic curves BP5038 FExternal dimensions (Units: mm) 24 |
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