L6205PD datasheet(12/21 Pages) STMICROELECTRONICS

12 / 21 page

L6205

12/21

APPLICATION INFORMATION

A typical application using L6205 is shown in Fig. 11. Typical component values for the application are shown

in Table 2. A high quality ceramic capacitor in the range of 100 to 200 nF should be placed between the power

pins (VSA and VSB) and ground near the L6205 to improve the high frequency filtering on the power supply and

reduce high frequency transients generated by the switching. The capacitors connected from the ENA and ENB

inputs to ground set the shut down time for the Brgidge A and Bridge B respectively when an over current is

detected (see Overcurrent Protection). The two current sources (SENSEA and SENSEB) should be connected

to Power Ground with a trace length as short as possible in the layout. To increase noise immunity, unused logic

pins (except ENA and ENB) are best connected to 5V (High Logic Level) or GND (Low Logic Level) (see pin

description). It is recommended to keep Power Ground and Signal Ground separated on PCB.

Table 2. Component Values for Typical Application

Figure 11. Typical Application

100uF

1N4148

100nF

1N4148

CBOOT

220nF

RENA

100k

Ω

10nF

RENB

100k

Ω

CENA

5.6nF

100

Ω

CENB

5.6nF

OUT1A

OUT2A

GND

OUT2B

OUT1B

VSA

POWER

GROUND

SIGNAL

GROUND

8-52VDC

VSB

VCP

VBOOT

SENSEA

ENB

CENB

RENB

ENABLEB

SENSEB

LOADA

LOADB

ENA

CENA

RENA

ENABLEA

D02IN1345

IN1A

IN2A

IN1A

IN2A

IN2B

IN1B

IN2B

IN1B

CBOOT

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