EVAL6229PD STMicroelectronics, EVAL6229PD Datasheet - Page 38

• Manufacturer Part Number: EVAL6229PD
• Description: EVAL BOARD FOR L6229PD SOIC
• Manufacturer: STMicroelectronics

Specifications of EVAL6229PD

• Mfg Application Notes: L6235, AN1625 App Note
• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: L6229PD SOIC
• Primary Attributes: 3-Ph BLDC, 8 ~ 52V Output, PWM Current Control, Brake Function
• Secondary Attributes: Over Current, Cross Conduction & Temperature Protection
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5491

AN1451 APPLICATION NOTE
4.3 EVAL6208PD
An evaluation board has been produced to help the evaluation of the device in PowerSO package. It implements
a typical application with several added components. Figure 43 shows the electrical schematic of the board; in
the table below the part list is reported.
CN1, CN2, CN3, CN4 2-poles connector
CN5
C1
C2
C3
C4
C5
C6, C9
C7, C8
C12
D1
D2
JP1
The Evaluation Board provides external connectors for the supply voltage, an external 5V reference for the logic
inputs, four outputs for the motor and a 34-pin connector to control the main functions of the board through an
external µC board or the PractiSPIN tool.
The PractiSPIN tool is composed of a graphic interface software running on a PC that connects with the hard-
ware based on the ST7 µC, which contains an upgradeable firmware. This tool allows a fast and easy evaluation
of the PowerSPIN family devices, giving the ability of setting the decay mode, the stepping sequence, the output
current; to control the motor speed, acceleration and deceleration and to program a sequence of movements.
The PC-software also provides a Power Dissipation and Thermal Analysis section, intended to help a fast eval-
uation of the device, package and dissipating copper area required by the user’s application, and to be a good
starting point designing an application (from the power dissipation and thermal point of view).
Running the evaluation board in stand-alone mode, instead, four switches (S1) allow enabling the device, set-
ting the direction of the rotation, the type of current decay, the stepping sequence. R8 and R17 set the reference
voltage separately for the two bridges, while R9, C6 and R19, C9 are low-pass filters to provide an external ref-
erence voltage by a PWM output of a µC (see also the Microstepping section). Using external V
R8, R20, R17 must be disconnected unless the PractiSPIN ST7 evaluation board is used. This board, in fact, is
provided with an offset cancellation circuitry trimmable through a potentiometer (see PractiSPIN documenta-
tion). R10, C7 and R11, C8 are used to set the off-time of the two channels of the IC.
The 5V voltage for logic inputs and for references (V
supply voltage, the value of resistor R1 should be changed in order to ensure a correct biasing of D2.
The jumper JP1 allows choosing the 5V voltage from the internal zener diode network or pin 11 of CN5 (for ex-
ample an external µC board can provide 5V to the evaluation board). Also CN2 connector can be used to pro-
vide an external 5V voltage to the board (in that case R1, D2 should be disconnected). CN2, or pin 1 of CN5,
can also be used to provide a 5V voltage to external circuits (as, for example, the PractiSPIN ST7 board). In this
case the current that can be drawn form the board depends on the supply voltage and on R1 value.
Figure 44, Figure 45, Figure 46 show the component placement and the two layers layout of the L6208PD Eval-
uation Board. A large GND area has been used, to guarantee minimal noise and good power dissipation for the
device.
38/43
34-poles connector
220nF/100V Ceramic or Polyester capacitor R3, R4, R5, R6, R7, R8
220nF/100V Ceramic or Polyester capacitor R8, R17
100µF/63V capacitor
10nF/100V Ceramic capacitor
10µF/16V Capacitor
68nF Capacitor
820pF Capacitor
100nF Capacitor
BAT46SW Diodes
BZX79C5V1 5.1V Zener Diode
3-pin jumper
refA
and V
refB
R1
R2, R3, R4, R5, R6, R7
R9, R19
R10, R11
R12, R13, R14, R15
R16, R20
R18
R21
S1
U1
) is obtained from R1, D2. Depending on the
3.5k
10k resistor
10k resistor
2.2k
100k
0.4 1W resistor
20k 1% resistor
100 resistor
4.7k
quad switch
L6208PD
5k trimmer
REF
0.6W resistor
resistor
resistor
trimmer
inputs R16,