Electronic Components Datasheet Search |
|
TOP226Y Datasheet(PDF) 6 Page - Power Integrations, Inc. |
|
TOP226Y Datasheet(HTML) 6 Page - Power Integrations, Inc. |
6 / 21 page TOP221-227 D 7/01 6 Figure 7. Schematic Diagram of a 4 W TOPSwitch-II Standby Power Supply using an 8 lead PDIP. Application Examples Following are just two of the many possible TOPSwitch implementations. Refer to the Data Book and Design Guide for additional examples. 4 W Standby Supply using 8 Lead PDIP Figure 7 shows a 4 W standby supply. This supply is used in appliances where certain standby functions (e.g. real time clock, remote control port) must be kept active even while the main power supply is turned off. The 5 V secondary is used to supply the standby function and the 12 V non-isolated output is used to supply power for the PWM controller of the main power supply and other primary side functions. For this application the input rectifiers and input filter are sized for the main supply and are not shown. The input DC rail may vary from 100 V to 380 V DC which corresponds to the full universal AC input range. The TOP221 is packaged in an 8 pin power DIP package. The output voltage (5 V) is directly sensed by the Zener diode (VR1) and the optocoupler (U2). The output voltage is determined by the sum of the Zener voltage and the voltage drop across the LED of the optocoupler (the voltage drop across R1 is negligible). The output transistor of the optocoupler drives the CONTROL pin of the TOP221. C5 bypasses the CONTROL pin and provides control loop compensation and sets the auto-restart frequency. The transformer’s leakage inductance voltage spikes are snubbed by R3 and C1 through diode D1. The bias winding is rectified and filtered by D3 and C4 providing a non-isolated 12 V output which is also used to bias the collector of the optocoupler’s output transistor. The isolated 5 V output winding is rectified by D2 and filtered by C2, L1 and C3. Wide-Range DC Input D S C CONTROL PI-2115-040401 + - R3 47 k Ω D1 UF4005 C1 2.2 nF 1 kV D2 UF5401 TOP221P L1 3.3 µH D3 1N4148 C4 100 µF 16 V U2 PC817A R1 10 Ω C3 100 µF 10 V +5 V C5 47 µF 10 V C2 330 µF 10 V U1 R2 100 Ω VR1 TOPSwitch-II T1 RTN + - 12 V Non-Isolated |
Similar Part No. - TOP226Y |
|
Similar Description - TOP226Y |
|
|
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 |