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TPS65279RHHT Datasheet(PDF) 21 Page - Texas Instruments

Part # TPS65279RHHT
Description  TPS65279 4.5- to 18-V Input, 5-A/5-A Dual Synchronous Step-Down Converter With Current Sharing
PDF  42 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

TPS65279RHHT Datasheet(HTML) 21 Page - Texas Instruments

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Current Sense
I/V Converter
V
V
ref
6
.
0
L
i
ESR
R
1
R
2
R
c
R
o
C
c
C
b
C
L
R
µS
g
M
1350
COMP
VFB
EA
1
C
VOUT
V
A
g
mps
/
10
=
=
=
ESR
b
C
R
Co
C
R
´
=
L
C
C
R
Co
C
R
´
=
P
O
L
1
(ƒ
)
C
R
2
=
´
´
p
c
O
O
C
M
ps
2
ƒ
V
C
R
g
Vref
gm
p ´
´
´
=
´
´
TPS65279
www.ti.com
SLVSC85C – AUGUST 2013 – REVISED MAY 2015
2. Set up cross over frequency, ƒc, which is typically between 1/5 and 1/20 of ƒsw.
3. RC can be determined by:
where
•
gM is the error amplifier gain (1350 μA/V).
•
gmps is the power stage voltage to current conversion gain (10 A/V).
4. Calculate CC by placing a compensation zero at or before the dominant pole:
(17)
(18)
5. Optional Cb can be used to cancel the zero from the ESR associated with CO.
(19)
Figure 23. DC/DC Loop Compensation
Copyright © 2013–2015, Texas Instruments Incorporated
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Product Folder Links: TPS65279



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