Electronic Components Datasheet Search |
|
CS5112EDWF24 Datasheet(PDF) 7 Page - Cherry Semiconductor Corporation |
|
CS5112EDWF24 Datasheet(HTML) 7 Page - Cherry Semiconductor Corporation |
7 / 10 page 7 Application Notes Circuit Description: continued Figure 6: Block diagram of the 1.4A current mode control switching regulator portion of the CS5112 in a boost configuration. VOUT R1 VFB1 VFB2 R2 R3 VR2 REQ { Figure 8. Feedback sense resistor divider connected between VOUT and ground. -1 VOUT VFB1 This section outlines a procedure for designing a boost switch- ing power supply operating in the discontinuous mode. Step 1 Determine the output power required by the load. POUT = IOUTVOUT (1) Step 2 Choose COSC based on the target oscillator frequency with an external resistor value, RBIAS = 64.9k½. (See Figure 1d). Figure 7: Voltage and current waveforms for boost topology in CS5112. Step 3 Next select the output voltage feedback sense resistor divider as follows (Figure 8). For VFB1 active, choose a value for R1 and then solve for REQ where: REQ = . (3a) For VFB2 active, find: VFB1 = VOUT , (3b) and then calculate R2 where: R2 = = . (3c) Then find R3, where: R3 = REQ - R2. (3d) VFB1 - VFB2 VFB1/REQ VR2 IR2 ) REQ R1 + REQ ( R1 0 VSW VIN VSAT t 0 ISW IPeak t 0 ID IPeak t VOUT Design Procedure for Boost Topology VIN 1.4A VSW COMP VFB1 VFB2 SELECT VLIN IBIAS COSC Gnd Bandgap Reference Oscillator Switcher Shutdown Switcher Error Amplifier Current Sense Amplifier ENABLE Multiplexer - COMP Base Drive Logic RBIAS 64.9k W RS R3 R2 R1 1.25V VOUT COUT |
Similar Part No. - CS5112EDWF24 |
|
Similar Description - CS5112EDWF24 |
|
|
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 |