Demonstration board description

AN3134

6/10

Doc ID 16960 Rev 1

The input lines EN, BRAKE and F/R are connected to ground through a pull-down resistor

which sets the default logic level to “low”. An external signal can be applied to change each

input status. The Hall effect inputs H1, H2 and H3 have a pull-up resistor connected to the

A charge pump circuit, made up of D1, C3 and C4, generates the supply voltage for the

high-side integrated MOSFETs. Due to voltage and current switching at relatively high

frequency, these components are connected through short paths in order to minimize

induced noise in other circuits.

R4 and C5 are used by the integrated overcurrent protection circuitry to set the protection

the values in Table 3).

RC network value, the off-time should be adjusted according to the electrical characteristics

and supply voltage of the motor.

R11, R12 and C8 are low-pass filters to provide an external reference voltage through the

PWM output of a microcontroller.

can be used to implement a simple frequency-to-voltage converter (speed loop control).

Figure 4, Figure 5 and Figure 6 show the component placement and the two-layer layout of

the EVAL6229QR demonstration board. A GND area is used for the IC power dissipation.

Table 3.

EVAL6229QR component list

Part reference

Part value

Part description

C1

220nF/100V

Capacitor

C2

100µF/63V

Capacitor

C3

10nF/25V

Capacitor

C4, C8

220nF/25V

Capacitor

C5

5.6nF

Capacitor

C6

820pF

Capacitor

C7

10nF

Resistor

D1

BAT46SW

Diodes

R1, R2, R3, R4

100k

Ω 5% 0.25W

Resistor

R5, R6, R7

10k

Ω 5% 0.25W

Resistor

R8

100k

Ω 1% 0.25W

Resistor

R9

20k

Ω 1% 0.25W

Resistor

R10

0.4

Ω 1W

Resistor

R11

20k

Ω 5% 0.25W

Resistor

R12

2k

Ω 5% 0.25W

Resistor

U1

L6229Q

3-phase BLDC motor driver in VFQFPN5x5