![]() |
Electronic Components Datasheet Search |
|
AMC7150 Datasheet(PDF) 5 Page - ADDtek Corp |
|
|
AMC7150 Datasheet(HTML) 5 Page - ADDtek Corp |
5 / 7 page ![]() AMC7150 Copyright © 2006 ADDtek Corp. 5 DD034_A -- JUNE 2006 Inductor The Inductor L stores energy during switch turn-on period and discharge driving current to LEDs via flywheel diode while switch turn-off. In order to reduce the current ripple on LEDs, the L value should high enough to keep the system working at continuous-conduction mode that inductor current won’t fall to zero. Since in steady-state operation the waveform must repeat from one time period to the next, the integral of the inductor voltage vL over one time period must be zero: 0 0 0 = + = ∫∫ ∫ ON s ON s tT t L L T L dt v dt v dt v Where OFF ON s t t T + = Therefore LED SAT Rsense CC F LED OFF ON V V V V V V t t − − − + = Where, VLED is the total forward voltage (at expecting current) of the LED string, VF is the forward voltage of the flywheel diode DF, VRsense is the peak value of the voltage drop across Rsense which is 300mV, and VSAT is the saturation voltage of the switch which has a typical value of 1V. Since the operation frequency f is determined by choosing appropriate value for timing capacitor CT, the switch turn-on time can also be known by f D T D t s ON = ⋅ = Where OFF ON ON t t t Dutycycle D + = ) ( With knowledge of the peak switch current and switch on time, the value of inductance can be calculated. ON PK LED SAT Rsense CC t I V V V V L ⋅ − − − = |
Similar Part No. - AMC7150_1 |
|
Similar Description - AMC7150_1 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
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 |