| ??? 05/05/08 11:06 Read: times |
#154417 - search again Responding to: ???'s previous message |
1)on page 1- hfe=15 at 1A is minimum value for this type.
2)on page 2 is represented behavior of hfe in relation with Ic. Values are in % , not avsolute. Assume You will buy worst case transistor - with hfe=100 on 150mA let say hfe=80 at 300mA. Be carefull - check 0.3A is nominal current, but what is startup current? |
| Topic | Author | Date |
| Clarification on choosing Hfe | 01/01/70 00:00 | |
| search again | 01/01/70 00:00 | |
| Its max current is 0.6A | 01/01/70 00:00 | |
| so if You continue playing .. | 01/01/70 00:00 | |
| My doubt is only on choosing Hfe.. | 01/01/70 00:00 | |
| read again | 01/01/70 00:00 | |
| Any hfe will work | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| How driving it? PWM or ON/OFF? | 01/01/70 00:00 | |
| PWM and ON/OFF | 01/01/70 00:00 | |
| Use a MOSFET | 01/01/70 00:00 | |
| See the typical transistor curves | 01/01/70 00:00 | |
| Here comes the spoon... | 01/01/70 00:00 | |
| You replies are clear.. | 01/01/70 00:00 | |
| Higher heat dissipation | 01/01/70 00:00 | |
Thank You! | 01/01/70 00:00 |