Electronic Components Datasheet Search |
|
FSDM0265RN Datasheet(PDF) 3 Page - Fairchild Semiconductor |
|
FSDM0265RN Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 20 page FSDL0165RN 3 Pin Definitions Pin Configuration Figure 3. Pin Configuration (Top View) Pin Number Pin Name Pin Function Description 1 GND Sense FET source terminal on primary side and internal control ground. 2Vcc Positive supply voltage input. Although connected to an auxiliary transform- er winding, current is supplied from pin 5 (Vstr) via an internal switch during startup (see Internal Block Diagram section). It is not until Vcc reaches the UVLO upper threshold (12V) that the internal start-up switch opens and de- vice power is supplied via the auxiliary transformer winding. 3Vfb The feedback voltage pin is the non-inverting input to the PWM comparator. It has a 0.9mA current source connected internally while a capacitor and op- tocoupler are typically connected externally. A feedback voltage of 6V trig- gers over load protection (OLP). There is a time delay while charging between 3V and 6V using an internal 5uA current source, which prevents false triggering under transient conditions but still allows the protection mechanism to operate under true overload conditions. 4Ipk Pin to adjust the current limit of the Sense FET. The feedback 0.9mA current source is diverted to the parallel combination of an internal 2.8k Ω resistor and any external resistor to GND on this pin to determine the current limit. If this pin is tied to Vcc or left floating, the typical current limit will be 1.2A. 5Vstr This pin connects directly to the rectified AC line voltage source. At start up the internal switch supplies internal bias and charges an external storage capacitor placed between the Vcc pin and ground. Once the Vcc reaches 12V, the internal switch is disabled. 6, 7, 8 Drain The Drain pin is designed to connect directly to the primary lead of the trans- former and is capable of switching a maximum of 650V. Minimizing the length of the trace connecting this pin to the transformer will decrease leak- age inductance. 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 45 5 5 5 6 6 6 6 7 7 7 7 8 8 8 8 GND GND GND GND Vcc Vcc Vcc Vcc Vfb Vfb Vfb Vfb Ipk Ipk Ipk Ipk Vstr Vstr Vstr Vstr Drain Drain Drain Drain Drain Drain Drain Drain Drain Drain Drain Drain 8DIP 8DIP 8DIP 8DIP 8LSOP 8LSOP 8LSOP 8LSOP |
Similar Part No. - FSDM0265RN |
|
Similar Description - FSDM0265RN |
|
|
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 |