EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 36

• Manufacturer Part Number: EVAL6730
• Description: EVAL BOARD FOR L6730XX
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of EVAL6730

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: 66W
• Voltage - Output: 3.3V
• Current - Output: 20A
• Voltage - Input: 4.5 ~ 14V
• Regulator Topology: Buck
• Frequency - Switching: 400kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6730
• Input Voltage: 8 V to 52 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6208
• Other names: 497-5501

Application details
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0 dB axis with -20 dB/decade slope and a phase margin greater than 45°. To locate poles
and zeroes of the compensation networks, the following suggestions may be used:
●
●
●
Figure 30. Asymptotic bode plot of converter's open loop gain
Modulator singularity frequencies:
Compensation network singularity frequencies:
Compensation network design:
–
–
–
–
–
–
Put the gain R
Place ω
Place ω
Place ω
Place ω
Check the loop gain considering the error amplifier open loop gain.
ω
Z1
Z2
P1
P2
ω
P
1
ω
LC
before the output filter resonance ω
at the output filter resonance ω
at the output capacitor ESR zero ω
at one half of the switching frequency;
=
Z
1
R
=
=
5
5
/R
⋅
⎛
⎜ ⎜
⎝
R
L
3
C
5
C
⋅
1
⋅
in order to obtain the desired converter bandwidth
1
18
Cout
1
18
C
ϖ
Doc ID 11938 Rev 3
+
19
⋅
C
C
C
=
19
19
R
R
⎞
⎟ ⎟
⎠
(17)
5
3
(13)
⋅
Δ
(15)
Vin
Vosc
ω
Z
⋅
ω
ϖ
2
ω
ESR
LC
=
P
2
C
=
LC
=
20
(18)
ESR
;
R
⋅
(
4
ESR
LC
R
1
⋅
1
C
3
1
⋅
;
+
Cout
20
;
R
4
)
(16)
(14)
(18)
L6730 - L6730B