L6258EP 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.
8V
DD
(5V) Supply voltage input for logic circuitry
9 GND Power ground connection of the internal charge pump circuit
10 V
CP1
Charge pump oscillator output
11 V
CP2
Input for external charge pump capacitor
12 V
BOOT
Overvoltage input for driving of the upper DMOS
13, 31 V
S
Supply voltage input for output stage. They are shorted
internally
14 OUT2A Bridge output connection (2)
15 I
0_2
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 I
1_2
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 I
3_2
See pin 15
23 I
2_2
See pin 15
24 EA_OUT_2 Error amplifier output (2)
25 EA_IN_2 Negative input of error amplifier (2)
26, 28 V
REF2
, V
REF1
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 I
2_1
See pin 3
33 I
3_1
See pin 3
34 OUT1B
Bridge output connection and positive input of the
tranconductance (1)
Table 3. Pin functions (continued)
Pin # Name Description
