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MB39C007 Datasheet(PDF) 18 Page - Cypress Semiconductor

Part # MB39C007
Description  2 ch DC/DC Converter IC with PFM/PWM Synchronous Rectification
PDF  41 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

MB39C007 Datasheet(HTML) 18 Page - Cypress Semiconductor

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Document Number: 002-08228 Rev. *C
Page 18 of 41
MB39C007
10.5
XPOR Threshold Voltage Setting [VPORH, VPORL]
Set the detection voltage by applying voltage to the VDET pin via an external resistor calculated according to this formula.
VTHHPR = 0.600 V
VTHLPR = 0.583 V
■ Example for setting detection voltage to 3.7 V
R3
= 510 kΩ
R4
= 100 kΩ
VPORH=
R3
+ R4
× VTHHPR
R4
VPORL =
R3
+ R4
× VTHLPR
R4
VPORH=
510 k
Ω + 100 kΩ
× 0.600 = 3.66 ≈ 3.7 [V]
100 k
Ω
VPORL =
510 k
Ω + 100 kΩ
× 0.583 = 3.56 ≈ 3.6 [V]
100 k
Ω
R4
R3
1 M
Ω
VIN
XPOR
AVDD
MB39C007
XPOR
VDET



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