L6258EX datasheet(6/32 Pages) STMICROELECTRONICS

6 / 32 page

Block diagram

L6258EX

6/32

Figure 2.

Pin connection (top view)

Table 3.

Pin functions

Pin #

Name

Description

1, 36

PWR_GND

Ground connection (1). They also conduct heat from die to

printed circuit copper.

2, 17

PH_1, PH_2

These TTL compatible logic inputs set the direction of

current flow through the load. A high level causes current to

flow from OUTPUT A to OUTPUT B.

3I1_1

Logic input of the internal DAC (1). The output voltage of the

DAC is a percentage of the Vref voltage applied according to

the thruth Table 5 on page 12.

4I0_1

See pin 3

OUT1A

Bridge output connection (1)

DISABLE

Disables the bridges for additional safety during switching.

When not connected the bridges are enabled

7TRI_cap

Triangular wave generation circuit capacitor. The value of

this capacitor defines the output switching frequency

PWR_GND

PH_2

EA_IN2

EA_OUT2

DISABLE

EA_OUT1

OUT1A

EA_IN1

PH_1

SENSE1

OUT1B

I3_1

I2_1

I3_2

OUT2B

SENSE2

PWR_GND

D96IN432E

GND

TRI_CAP

VCC

I0_1

VREF1

I1_1

VCP1

SIG_GND

OUT2A

VCP2

VBOOT

VREF2

I2_2

I0_2

I1_2

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