STEVAL-ISA024V1 STMicroelectronics, STEVAL-ISA024V1 Datasheet - Page 21

• Manufacturer Part Number: STEVAL-ISA024V1
• Description: EVAL BOARD 20A 250KHZ L6725
• Manufacturer: STMicroelectronics
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of STEVAL-ISA024V1

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 20A
• Voltage - Input: 4.5 ~ 14V
• Regulator Topology: Buck
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6725
• Input Voltage: 4.5 V to 14 V
• Output Voltage: 3.3 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: L6725
• Kit Application Type: Power Management - Voltage Regulator
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6725
• Other names: 497-5867

L6725 - L6725A
Figure 15. Asymptotic Bode plot of Converter's open loop gain
●
●
●
Modulator singularity frequencies:
Compensation network singularity frequencies:
Compensation network design:
–
–
–
–
–
–
Put the gain R
Place
Place
Place
Place
Check the loop gain considering the error amplifier open loop gain.
ω
ω
P
Z
1
1
ω
=
ω
ω
ω
ω
=
LC
Z1
Z2
P1
P2
R
R
5
=
5
before the output filter resonance
at the output filter resonance
at the output capacitor ESR zero
at one half of the switching frequency;
⋅
1
⋅
⎛
⎜ ⎜
⎝
C
C
5
19
C
L
/R
18
1
18
⋅
1
ϖ
Cout
3
+
⋅
in order to obtain the desired converter bandwidth:
C
C
C
(12)
19
=
19
⎞
⎟ ⎟
⎠
R
R
5
3
(8)
(10)
⋅
∆
Vin
Vosc
ω
⋅
ϖ
ω
Z
2
LC
ESR
ω
ω
=
LC
P
=
C
(14)
2
;
ω
ω
20
ESR
=
ESR
LC
⋅
R
(
R
;
4
1
;
1
⋅
3
⋅
1
Cout
C
+
20
R
4
)
(11)
(9)
(13)
Application details
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