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 What kind of circuit should I use with the BD8152FVM switching regulator for an output voltage greater than 15V? We would like to have an input voltage of 52V and output of 55V/3A, but the switching terminal voltage and permissible power are over the rated values. In this case is it ok to use an external FET? The BD8152FVM integrates a FET, making external FET drive, and therefore step-up 55V/3A output, impossible.However, inputting IC drive voltage (i.e. 12V) to the Vcc of the BD9306AFVM controller allows for high input/output voltage operation. Products: Switching Regulators FAQ ID: 355 Will any problems occur with the BD9006 DC/DC converter (with an input voltage range of 7 to 35V and output range of 0.8V to Vin), if Vin=35V and Vout=0.8V? The BD9006 features a minimum ON time of 250ns. For example, with a switching frequency of 100kHz the minimum ON duty ratio is 250ns/(1/100kHz) x 100 = 2.5%. So with an input voltage of 35V the minimum output voltage is 35V x 2.5% = 0.875V. It is possible to achieve the desired output by decreaseing the switching frequency. However, the inductor and capacitor values will increase. Products: Switching Regulators FAQ ID: 356 Is it ok to use the recommended product values in Examples 1 and 2 for L1, D1, C1, and C2 listed in the datasheet for BD9870FPS when Vcc=24V and Vout=13V? There shouldn't be any problems with using the settings for recommended products 1 listed in the datasheet. However, please verify operation in the customer's application.Data Sheet Products: Switching Regulators FAQ ID: 357 Can a minimum voltage of 1V be set when the maximum supply voltage of 35V is input to the BD9870FPS? No, a minimum voltage of 1V cannot be set with a maximum supply input voltage of 35V. In this case the minimum voltage is around 3V. Products: Switching Regulators FAQ ID: 358 What does the 'E2' signify when it is listed at the end of BD9897FS? This designation refers to the packaging and forming specifications. 'E2' signifies embossed tape and reel with Pin 1 fed last. Products: Switching Regulators FAQ ID: 359 What is MSL? Short for Moisture Sensitivity Level, MSL is a JEDEC (Joint Electron Device Engineering Council) standard established for the purpose of preventing device failure due to volumetric expansion of atmospheric moisture introduced into the resin package of semiconductor devices during reflow.The floor life of IC packages, during which the components must be mounted and reflowed after opening the moisture-resistant packaging, is broken down into 8 MSL levels. FAQ ID: 511 How can one acquire reliability data such as the failure rates (e.g. FIT)? Please inquire at the nearest sales office by phone or fill out this form. FAQ ID: 54
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