L6460 STMicroelectronics, L6460 Datasheet - Page 68

• Manufacturer Part Number: L6460
• Description: MOSFET & Power Driver ICs SPI Config Stepper DC Multi Motor DRV
• Manufacturer: STMicroelectronics
• Type: Full-Bridge Driverr

Specifications of L6460

• Product: Half-Bridge Drivers
• Rise Time: 0.4 us
• Fall Time: 0.4 us
• Supply Voltage (max): 38 V
• Supply Voltage (min): 13 V
• Supply Current: 11 mA
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 4
• Output Current: 10 mA
• Output Voltage: 30 V
• Package / Case: TQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power bridges
Note:
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An internal DAC is used to digitally control the output regulated current. The available values
are chosen to provide a quasi sinusoidal profile of the current. The current limit in each
phase is decided by PhADAC[3:0] bits for phase A and PhBDAC[3:0] bits for phase B. The
table below describes the relation between the value programmed in the stepper DAC and
the current level.
Table 24.
The min and max values are guaranteed by testing the percentage of VSTEPREF that
allows the commutation of the Rsense comparator.
I
To obtain the best phase approximation of a sinusoidal wave, the user needs to repeat the
final (100%) value. So the full values sequence should be as follows: 0, 1, 2, 3 … D, E, F, F,
F, E, D … 3, 2, 1, 0.
Even if the total spread shows overlapping between current steps, the monotonicity is
guaranteed by design.
When the internal sequencer the minimum angle resolution is nominally 5.625°, so
depending on the control mode chosen, the selectable steps are
MAX
PhXDAC [3:0]
=V
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
STEPREF
DAC
/ R
SENSE
.
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Doc ID 17713 Rev 1
Phase current ratio respect to I
(Hi-Z)
I
19.5
29.0
38.3
47.1
55.6
63.4
70.7
77.3
83.1
88.2
92.4
95.7
98.1
Typ
MAX
9.8
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Table
MAX
25.
% of IMAX
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
% of I
Unit
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
MAX
L6460