L6280 datasheet(14/26 Pages) STMICROELECTRONICS

14 / 26 page

In full bridge configuration D0 to D3 set the driv-

ing strategy of the bridge:

Tristate left and right

Chopper left, brake right

Chopper right, brake left

Brake left, brake right

Tristate left and right

Diagonal chopper

Inverted diagonal chopper

Tristate left and right

c) Dual Half Bridge Configuration

Tristate left and right

Brake right, chopper left

Brake right, chopper right

Brake left, brake right

Chopper left, chopper right

Tristate left, chopper right

Tristate right, chopper left

Tristate left and right

CHANNEL 3

For channel 3 only D0 has a meaning: it directly

drives the low side driver DMOS. When D0 = 0

the low side driver DMOS is switched OFF and

the current flows through external recirculation di-

odes.

A0 A1

0 When A0, A1 are in this configuration, D0

to D3 are used to set the strategy of the

output power stages according to the out-

put stage configuration previously selected.

A1 A0

0 When A0, A1 are in this configuration,

D0 to D2 are loaded into left or right wind-

ing D/A converter, according to D3 value

(only for channel 1 and 2)

Left channel DAC

Right channel DAC

For channel 3, D0 to D2 are loaded into the

unique DAC.

A1 A0

1 1 When A0, A1 are in this configuration, the

value of D0 to D3 causes an increment or

a decrement of the content of left/right

DAC of a channel. The inc/dec operation

and the DAC register selection (right or

left) are selected according to the following

truth table:

dec LEFT

inc LEFT

dec RIGHT

inc RIGHT

The change in DAC registers is done immediately

after receiving the data.The configurations D3, D2

= 11 and D1, D0 = 11 are not allowed. (Them can

cause faulty operations) Channel 3 has only one

DAC; the change in its value is done according to

D0,D1 value.

dec DAC

inc DAC

D1, D0 = 11 is not allowed (they can cause faulty

operations).

Output Operation

In full bridge and dual half bridge configurations,

the output stages will operate according to D1,

D2, D3 values.

FULL BRIDGE CONFIGURATION (CH1 and

CH2)

In full bridge configuration the cennection be-

tween the output of the high side drivers and the

corresponding low side drivers has to be made

with external jumpers. The output stage diagram

here below (Fig. 13) must be substituted inside

the blank boxes in the following block diagrams.

L6280

14/26

L6280 Datasheet(PDF) 14 Page - STMicroelectronics

L6280 Datasheet(HTML) 14 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Datasheet Download

Link URL