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MB39C014 датащи(PDF) 6 Page - Cypress Semiconductor

номер детали MB39C014
подробное описание детали  1 ch DC/DC Converter IC with PFM/PWM Synchronous Rectification
PDF  32 Pages
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производитель  CYPRESS [Cypress Semiconductor]
домашняя страница  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

MB39C014 датащи(HTML) 6 Page - Cypress Semiconductor

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Document Number: 002-08361 Rev. *C
Page 6 of 32
MB39C014
4.1 Current Mode
■ Original Voltage Mode Type:
Stabilize the output voltage by comparing two items below and on-duty control.
❐ Voltage (VC) obtained through negative feedback of the output voltage by Error Amp
❐ Reference triangular wave (VTRI)
■ Current Mode Type:
Instead of the triangular wave (VTRI), the voltage (VIDET) obtained through I-V conversion of the sum of currents that flow in the
oscillator (rectangular wave generation circuit) and SW FET is used.
Stabilize the output voltage by comparing two items below and on-duty control.
❐ Voltage (VC) obtained through negative feedback of the output voltage by Error Amp
❐ Voltage (VIDET) obtained through I-V conversion of the sum of current that flow in the oscillator (rectangular wave generation circuit)
and SW FET
VIN
ton
toff
VTRI
Vc
Vc
VTRI
VIN
toff
Vc
Vc
VIDET
S
R
ton
SR-FF
VIDET
Q
Voltage mode type model
Current mode type model
Oscillator
Note :
The above models illustrate the general operation and an actual operation will be preferred in the IC.



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