EVAL6229PD STMicroelectronics, EVAL6229PD Datasheet - Page 33

• 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

4.2 EVAL6208N
An evaluation board has been produced to help the evaluation of the device in PowerDIP package. It imple-
ments a typical application with several added components. Figure 37 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
C7, C8
C9, C10
D1, D2
D3
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. R20 and R24 set the refer-
ence voltage separately for the two bridges, while R13, C7 and R22, C8 are low-pass filters to provide an
external reference voltage by a PWM output of a µC (see also the Microstepping section). Using external V
inputs R10, R20, R21, R24 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
documentation). R11, C9 and R12, C10 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 R2 should be changed in order to ensure a correct biasing of D3.
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 R2, D3 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 R2 value.
Figure 38, Figure 39, Figure 40 show the component placement and the two layers layout of the L6208N Eval-
uation Board. A large GND area has been used, to guarantee minimal noise and good power dissipation for the
device.
34-poles connector
220nF/100V Ceramic or Polyester capacitor R3, R4, R5, R6, R7, R8
220nF/100V Ceramic or Polyester capacitor R9
100µF/63V capacitor
10nF/100V Ceramic capacitor
10µF/16V Capacitor
100nF Capacitor
68nF Capacitor
820pF Capacitor
1N4148 Diode
BZX79C5V1 5.1V Zener Diode
refA
and V
refB
R1
R2
R10, R21
R11, R12
R13, R22
R14, R15, R16, R17, R18, R191
R20, R24
S1
U1
JP1
) is obtained from R2, D3. Depending on the
3-pin jumper
AN1451 APPLICATION NOTE
100 resistor
820 0.6W resistor
10k resistor
4.7k
20k 1% resistor
100k
2.2k
5k trimmer
quad switch
L6208N
0.4W resistor
resistor
resistor
trimmer
33/43
REF