 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
GM431BS8R Datasheet(PDF) 8 Page - Gamma Microelectronics Inc. |
|
||||||||||||||||||||||||||||||
GM431BS8R Datasheet(HTML) 8 Page - Gamma Microelectronics Inc. |
|
|
8 / 11 page  8 GM431 2.5V ADJUSTABLE SHUNT REGULATORS G1 * fOSC: PWM Switching frequency G2 F1 F2 FAC AC Characteristic Determination: This refers to the determination of the gain frequency characteristic of the Shunt regulator as an error amp1ifier. Taking the configuration in Figure 10, the error amp1ifier characteristic is as Shown in Figure 10. In Figure 17, the following formulas are obtained: Gain G1 = G0 ≅ 50 dB to 60 dB (determined by shunt regulator) Corner frequencies f1 = 1/(2pC1G0R3) f2 = 1/(2pC1R5) G0 iS the Shunt regulator open-loop gain; this is given by the reciprocal of the reference voltage fluctuation: ∆VREF/∆VKA, and is approximately 50 dB. Practical Example Consider the example of a photocoupler, with an internal light emitting diode VF = 1.05 V and IF = 2.5mA, power supply output vo1tage V2 = 5V, and bias resistance R2 current of approximately 1/5 IF at 0.5mA. If the Shunt regulator VK = 3V, the following values are found. Next, assume that R3 = R4 = 10k. This gives a 5V output. If R5 = 3.3 k, and C1 = 0.022 pF, the following values are found. G2 = 3.3kΩ / 10kΩ = 0.33 times (-10 dB) f1 = 1 / (2 × π × 0.022µF × 316 × 10 k) = 2.3 (Hz) f1 = 1 / (2 × π × 0.022µF × 3.3k) = 2.2 (kHz) 2 Figure 10. GM431 Error Amplification Characteristic When R5= 0 When R5= 0 fOSC Frequency f (Hz) G2 = R 3 R5 1.05V R2 = 0.54mA = 2.1kΩ R1 = 2.5mA + 0.54mA 5V – 1.05V – 3V = 316Ω |
Similar Part No. - GM431BS8R |
|
Similar Description - GM431BS8R |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
