L6258EX

Block diagram

7/32

Note:

The number in parenthesis shows the relevant Power Bridge of the circuit. Pins 18, 19, 1

and 36 are connected together.

Supply voltage input for logic circuitry

9

GND

Power ground connection of the internal charge pump circuit

10

Charge pump oscillator output

11

Input for external charge pump capacitor

12

Overvoltage input for driving of the upper DMOS

13, 31

Supply voltage input for output stage. They are shorted

internally

14

OUT2A

Bridge output connection (2)

15

Logic input of the internal DAC (2). The output voltage of the

DAC is a percentage of the VRef voltage applied according

to the truth Table 5 on page 12.

16

See pin 15

18, 19

PWR_GND

Ground connection. They also conduct heat from die to

printed circuit copper

20, 35

SENSE2, SENSE1 Negative input of the transconductance input amplifier (2, 1)

21

OUT2B

Bridge output connection and positive input of the

tranconductance (2)

22

See pin 15

23

See pin 15

24

EA_OUT_2

Error amplifier output (2)

25

EA_IN_2

Negative input of error amplifier (2)

26, 28

Reference voltages for the internal DACs, determining the

output current value. Output current also depends on the

logic inputs of the DAC and on the sensing resistor value

27

SIG_GND

Signal ground connection

29

EA_IN_1

Negative input of error amplifier (1)

30

EA_OUT_1

Error amplifier output (1)

32

See pin 3

33

See pin 3

34

OUT1B

Bridge output connection and positive input of the

tranconductance (1)

Table 3.

Pin functions (continued)

Pin #

Name

Description