EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 28

• 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

AN1451 APPLICATION NOTE
Figure 30. Microstepping Application.
Figure 31. Microstepping reference voltages, output currents and CLOCK signal.
Especially at high rotation speeds, slow decay mode can be inadequate since it does not allow the motor current
to decay fast enough, following the decreasing slope of the desired sine wave. In this case it's possible to apply
the fast decay mode just during the negative slope of the current (see Figure 32). The disadvantage is an in-
creased current ripple in the other winding (where the current is increasing and fast decay in not needed).
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I
I
MAX
MAX
* R
* R
-I
SENSE
SENSE
-I
0 V
0 V
5 V
0 V
I
MAX
I
MAX
MAX
MAX
µ C
.
.
.
.
.
P W M
P W M
O U T
O U T
O U T
O U T
O U T
A
B
1
2
3
4
5
90 °
1 0 0k
5 6 k
5 6 k
1 5k
1 5k
V
refB
CLOCK
I
I
V
OUTA
OUTB
refA
1 0 n F
1 0 n F
5 .6 n F
V
V
E N
C O N T R O L
C W /C C W
C L O C K
R E S E T
H A L F /F U L L
refA
refB
L 6 2 0 8