Home > Product Information > Other Technology Products > DC Power Boards > Models   TF Series The TF series consist of three different products: the TFP, TFS, and TFV. Most models come with a gate bias voltage is -5V, but we also offer some model with -3V output. DC/DC converter + regulator for gate bias voltage Stabilization regulator for drain voltage stabilization + sequence control switch TFS series: drain voltage ON/OFF TTL input TFV series: variable negative voltage output TFP Series The TFP series includes basic models with no special optional features. The series is divided into two subgroups based on maximum drain and gate current volume. TFP03x Base model TF series board, supplying 3A drain and 20/30mA gate minimum current TFP508C Supplies current of 12A drain and 80mA gate. Drain side output voltage is set at +10V by the factory, but can be mechanically adjusted within the range of +8V~+12V. (However, the output voltage selection is affected by input voltage range. Please contact us for more complete information.) TFS Series TFS50AC The model's basic design configuration is identical to the TFP508C with the addition of a TTL control switch. Applying an external TTL level signal turns drain side output voltage ON and OFF. However, this modification limits the selection range of the output voltage between +10V~+12V (factory default setting of +10V). TFV Series The TFV03X is identical to the TFP03x, except that a second negative voltage output terminal is added. This output can be manually adjusted within a range of 0 to 5V (-3V for some models) by using a potentiometer. TMF Series The TFM06x uses MOS FET as control transistors, which makes it possible to reduce the differential between input voltage to the power board and output voltage, as well as increasing the maximum current to 20A. TMS Series The TMS20x is fundamentally identical to the TMF06x, but it includes a feature to apply an external TTL level signal to turn the drain side output voltage ON and OFF. SFP Series The SFP series provides the same basic gate voltage supply and sequencing protection as the TF series but does not have a series regulator for the drain voltage output. Output voltage depends entirely on input voltage, and since there is no regulation circuitry as in the TF series, power loss can only be smaller than the switch circuit loss. The SFP series has both -5V and -3V gate bias output voltage models. T3M Series This power board is available only in a -3V bias voltage model and has no drain voltage.