E-L6258EX STMicroelectronics, E-L6258EX Datasheet - Page 22

IC MOTOR DRIVER PWM POWERSO36

E-L6258EX

Manufacturer Part Number
E-L6258EX
Description
IC MOTOR DRIVER PWM POWERSO36
Manufacturer
STMicroelectronics
Type
Dual DMOS Full Bridge PWM Motor Driverr
Datasheet

Specifications of E-L6258EX

Applications
DC Motor Driver, Stepper Motor Driver
Number Of Outputs
2/1
Current - Output
1.5A
Voltage - Load
12 V ~ 40 V
Voltage - Supply
4.75 V ~ 5.25 V
Mounting Type
Surface Mount
Package / Case
36-BSSOP (0.433", 11.0mm Width) Exposed Pad
Operating Supply Voltage
12 V to 40 V
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Operating Temperature
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
E-L6258EXTR
Manufacturer:
ST
Quantity:
1 000
Company:
Part Number:
E-L6258EXTR
Quantity:
3 000
PWM current control loop
3.5
22/32
Figure 9.
We can see that the effect of the load pole is cancelled by the zero of the Bx block ; the total
Aloop cross a the 0dB axis with a slope of -20dB/decade, having in this way a stable system
with an high gain at low frequency and a bandwidth of around 8KHz.
To increase the bandwidth of the system, we should increase the gain of the Bx block,
keeping the zero in the same position. In this way the result is a shift of the total Aloop
transfer function up to a greater value.
Effect of the Bemf on the current control loop stability
In order to evaluate what is the effect of the Bemf voltage of the stepper motor we have to
look at the load block:
Aloop bode plot (compensated)
L6258EX

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