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EL7641 Datasheet(PDF) 11 Page - Renesas Technology Corp

Part # EL7641
Description  TFT-LCD DC/DC with Integrated Amplifiers
PDF  19 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

EL7641 Datasheet(HTML) 11 Page - Renesas Technology Corp

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EL7640, EL7641, EL7642
FN7415 Rev 2.00
Page 11 of 19
February 22, 2006
The current through MOSFET is limited to 3A peak. This
restricts the maximum output current based on the following
equation:
Where
IL is peak to peak inductor ripple current, and is set
by:
where fS is the switching frequency.
FIGURE 18. THE BLOCK DIAGRAM OF THE BOOST CONTROLLER
IOMAX
ILMT
IL
2
--------
–

 VIN
VO
---------
=
IL
VIN
L
---------
D
fS
-----
=
IREF
IREF
FBB
IFB
IFB
COMP
VOLTAGE
AMPLIFIER
LX
PGND
SHUTDOWN
& START-UP
CONTROL
GM
AMPLIFIER
SLOPE
COMPENSATION
BUFFER
PWM
LOGIC
CURRENT
AMPLIFIER
CLOCK
REFERENCE
GENERATOR



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