ISL6558EVAL1Z Intersil, ISL6558EVAL1Z Datasheet - Page 3

• Manufacturer Part Number: ISL6558EVAL1Z
• Description: EVAL BOARD 1 FOR ISL6558
• Manufacturer: Intersil

Specifications of ISL6558EVAL1Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Converter Design
This section summarizes a step-by-step procedure for a
12V-to-1.5V@100A power supply for high current and
high transient speed applications. The terms used in all
equations are defined at the end of this application note,
unless otherwise stated in the text. Some fundamental
formulae to calculate RMS values of triangular and
trapezoid waveforms and to derive most equations in this
application note are defined in the following.
CH2, UPPER AND
CH1, UPPER AND
CH3, UPPER AND
CH4, UPPER AND
LOWER FETS
LOWER FETS
LOWER FETS
LOWER FETS
CURRENT
CURRENT
CURRENT
CURRENT
CH1 PWM
CH2 PWM
CH3 PWM
CH4 PWM
I
I
I
I
I
LO,1
LO,2
LO,3
LO,4
PP
FIGURE 3. FOUR-CHANNEL INTERLEAVED DC-DC BUCK CONVERTER TIMING DIAGRAM
D
I
Q1
3
I
Lo,PP
D
Application Note 1029
I
Q2
1-D
D
I
Q1
I
Q2
Irms2
CASE 1
1-D
CASE 2
Irms1
I
D
Q1
=
=
I
PP
0
⎛
⎝
Ic
Ic
I Δ
2
2
+
+
I
Δ
------- -
Lo,PP
12
Δ
------- -
12
Ia
I
I
I
Q1
I
Q2
2
2
⎞
⎠
•
1 D
D
–
Ib
Ib
Ia
D
I
Q2
I
Q1
I
Q2
I Δ
D
0
Io
---- -
Io
---- -
N
Io
-----
Io
-----
N
Io
---- -
Io
---- -
Io
---- -
N
N
N
N
N
Io
---- -
N
July 31, 2009
AN1029.3
Ic
Ic