參數(shù)資料
型號(hào)： L6228PDTR
廠商： STMICROELECTRONICS
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 2.8 A, PDSO36
封裝： POWER, SO-36
文件頁(yè)數(shù)： 14/28頁(yè)
文件大?。?/td> 589K
代理商： L6228PDTR
21/26
L6228
Figure 26. IC Power Dissipation versus Output Current in WAVE Mode (full step one phase on).
Figure 27. IC Power Dissipation versus Output Current in MICROSTEPPING Mode.
Thermal Management
In most applications the power dissipation in the IC is the main factor that sets the maximum current that can
be delivered by the device in a safe operating condition. Therefore, it has to be taken into account very carefully.
Besides the available space on the PCB, the right package should be chosen considering the power dissipation.
Heat sinking can be achieved using copper on the PCB with proper area and thickness. Figures 28, 29 and 30
show the Junction-to-Ambient Thermal Resistance values for the PowerSO36, PowerDIP24 and SO24 packag-
es.
For instance, using a PowerSO package with copper slug soldered on a 1.5mm copper thickness FR4 board
with 6cm2 dissipating footprint (copper thickness of 35m), the Rth(j-amb) is about 35°C/W. Fig. 31 shows mount-
ing methods for this package. Using a multi-layer board with vias to a ground plane, thermal impedance can be
reduced down to 15°C/W.
No PW M
fSW = 3 0 kHz (slow decay)
Test Conditions:
Supply Voltage = 24V
I A
I B
IOUT
WAVE DRIVE
PD [W]
I OUT [A]
0
0.25 0.5 0.75 1
1.25 1.5
0
2
4
6
8
10
fSW = 50 k
Hz (slow decay)
fSW = 30 k
Hz (slow decay)
I A
I B
IOUT
MICROSTEPPING
PD [W]
I OUT [A]
Test Conditions:
Supply Voltage = 24V
0
0.25 0.5 0.75 1
1.25 1.5
0
2
4
6
8
10
相關(guān)PDF資料
PDF描述
L6228DTR STEPPER MOTOR CONTROLLER, 2.8 A, PDSO24
L6234PD013TR BRUSHLESS DC MOTOR CONTROLLER, 5 A, PDSO20
L6237 BRUSHLESS DC MOTOR CONTROLLER, 2 A, PQFP64
L6238SQA BRUSHLESS DC MOTOR CONTROLLER, 5 A, PQFP44
L6238SQT BRUSHLESS DC MOTOR CONTROLLER, 5 A, PQFP64
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