Os motores de busca de Datasheet de Componentes eletrônicos |
|
UC3844BVDR2 Folha de dados(PDF) 11 Page - ON Semiconductor |
|
UC3844BVDR2 Folha de dados(HTML) 11 Page - ON Semiconductor |
11 / 20 page UC3844B, UC3845B, UC2844B, UC2845B http://onsemi.com 11 If: SENSEFET = MTP10N10M RS = 200 Figure 20. Adjustable Reduction of Clamp Level Figure 21. Soft−Start Circuit Figure 22. Adjustable Buffered Reduction of Clamp Level with Soft−Start + − 5.0V Ref + − S R Q Bias + Osc R R R 2R EA 1.0V 5(9) 7(11) 6(10) 5(8) 3(5) RS Q1 VCC Vin 1(1) 2(3) 4(7) 8(14) R1 VClamp R2 Ipk(max) [ VClamp RS Where: 0 ≤ VClamp ≤ 1.0 V 5.0V Ref + − S R Q Bias + 1.0mA Osc R R R 2R EA 1.0V 5(9) 1(1) 2(3) 4(7) 8(14) C 1.0M tSoft−Start ≈ 3600C in mF + − + − S R + R R R 2R Ipk(max) [ VClamp RS Figure 23. Current Sensing Power MOSFET 5.0V Ref Q Bias Osc EA 1.0V 5(9) 7(11) 6(10) 5(8) 3(5) RS Q1 VCC Vin 1(1) 2(3) 4(7) 8(14) R1 R2 Where: 0 ≤ VClamp ≤ 1.0 V MPSA63 + − 5.0V Ref + − S R Q (11) (10) (8) Comp/Latch (5) RS 1/4 W VCC Vin K M D SENSEFET G S Power Ground: To Input Source Return Control Circuitry Ground: To Pin (9) Virtually lossless current sensing can be achieved with the implementation of a SENSEFET t power switch. For proper operation during over−current conditions, a reduction of the Ipk(max) clamp level must be implemented. Refer to Figures 20 and 22. VPin5 [ RS Ipk rDS(on) rDM(on) ) RS Then : VPin5 [ 0.075 Ipk 7(12) 7(12) 1.0 mA Comp/Latch Comp/Latch 1.0 mA (12) T T T T VClamp VClamp ≈ 1.67 R2 R1 ) 1 + 0.33x10−3 R1R2 R1 ) R2 VClamp ≈ 1.67 R2 R1 ) 1 tSoft-Start +* In 1 * VC 3VClamp C R1 R2 R1 ) R2 |
Nº de peça semelhante - UC3844BVDR2 |
|
Descrição semelhante - UC3844BVDR2 |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes 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 |