Electronic Components Datasheet Search |
|
FP2189-PCB1900S Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers |
|
FP2189-PCB1900S Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers |
6 / 6 page This document contains information on a new product. Specifications and information are subject to change without notice WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6620 • e-mail: sales@wj.com • Web site: www.wj.com May 2002 The Communications Edge TM Preliminary Product Information FP2189 1 Watt HFET Outline Drawing Land Pattern Mounting Configuration R6 8.2 k Ω Vdd = +8 V Vgg = -4 V UMT1N 6 1 5 2 4 3 Connected to Vdd on App Circuit Connected to Vgg on App Circuit R5 8.2 k Ω R3 220 Ω R4 1 Ω 1% 0805 Application Note Special attention should be taken to properly bias the FP2189. Power supply sequencing is required to prevent the device from operating at 100% Idss for a prolonged period of time and possibly causing damage to the device. It is recommended that for the safest operation, the negative supply be “first on and last off.” With a negative gate voltage present, the drain voltage can then be applied to the device. The gate voltage can then be adjusted to have the device be used at the proper quiescent bias condition. An optional temperature-compensation active-bias circuit is recommended for use with the application circuit, which requires two standard voltage supplies +8V and -4V, and is set for an optimal drain bias of +8V @ 250 mA. The circuit schematic, shown on the right, uses dual PNP transistors to provide a constant drain current into the FP2189 and also eliminates the effects of pinchoff variation. Temperature compensation is achieved by tracking the voltage variation with the temperature of the emitter-to-base junction of the PNP transistors. Thus the transistor emitter voltage adjusts the voltage incident at the gate of the FP2189 so that the device draws a constant current, regardless of the temperature. Two fixed voltage supplies are needed for operation. A Rohm dual transistor, UMT1N, and a dual-chip resistor (8.2 k Ω) are recommended to minimize board space and help decrease the current variability through R4 with the components being matched to one another. The active-bias circuit can directly be attached to the voltage supply ports in the circuit diagram as shown above (Vdd and Vgg). |
Similar Part No. - FP2189-PCB1900S |
|
Similar Description - FP2189-PCB1900S |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |