L6280 datasheet(15/26 Pages) STMICROELECTRONICS

部件名	L6280

功能描述	THREE CHANNELS MULTIPOWER DRIVER SYSTEM

PDF	26 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

15 / 26 page

Figure 13

Figure 14

Figure 15

001

Chopper left side; fixed

right side (one phase

chopping)

The left side of the bridge is controlled by the

PWM loop while HSD2 is held OFF and LSD2A

and 2B are held ON. During ON time (Q low) the

current flows thrugh HSD1, motor winding and

LSD2A and 2B. During OFF time the current can

recirculate through LSD1A, 1B, 2A and 2B (Fig.

15)

Tristate left and right

All output DMOSs of the channel are OFF (Fig.

14)

hopper right side, fixed

left side (one phase

chopping)

As above but with the two channel exchanged

each to other (Fig. 16).

Figure 16

Fixed both left and right

(brake action)

All High side drivers are held OFF while all low

side drivers are held ON. The motor winding is

short circuited through the low side drivers; the

motor’s back EMF acts as a brake voltage (Fig.

17).

L6280

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L6280 数据表(PDF) 15 Page - STMicroelectronics