EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 21

• 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

2.13 Power Management
Even when operating at current levels well below the maximum ratings of the device, the operating junction tem-
perature must be kept below 125 °C.
Figure 21 shows the IC dissipated power versus the r.m.s. load current, in 4 different driving sequences, assum-
ing the supply voltage is 24V.
Figure 21. IC Dissipated Power versus Output Current.
P
P
P
D
P
D
D
D
[W]
[W]
[W ]
[W]
10
10
10
10
8
6
4
2
0
8
6
4
2
0
8
6
4
2
0
8
6
4
2
0
0
0
0
0
0.5
0.5
0.5
0.5
MICROSTEPPING
NORM AL DRIVE
HALF STEP
WAVE DRIVE
1
1
1
1
I
I
I
I
OUT
OUT
OUT
OUT
1.5
1.5
1.5
1.5
[A]
[A ]
[A]
[A]
2
2
2
2
2.5
2.5
2.5
2.5
3
3
3
3
I
I
A
B
I
I
I
I
I
I
A
B
A
A
B
B
Test Conditions:
Supply Voltage = 24V
Test Conditions:
Supply Voltage = 24V
f
f
SW
Test Conditions:
Supply Volt age = 24 V
SW
Test Conditions:
Supply Voltage = 24V
= 30 k Hz (slow decay)
= 50 k Hz (slow decay)
I
OUT
I
OUT
I
No PWM
f
I
OUT
OUT
SW
No PW M
f
I
No PWM
f
SW
OUT
SW
= 30 kHz (slow decay)
= 3 0 kHz (slow decay)
= 30 kHz (slow decay)
AN1451 APPLICATION NOTE
I
OUT
I
OUT
I
OUT
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