EVAL6730 STMicroelectronics, EVAL6730 Datasheet - Page 2

EVAL BOARD FOR L6730XX

EVAL6730

Manufacturer Part Number
EVAL6730
Description
EVAL BOARD FOR L6730XX
Manufacturer
STMicroelectronics
Type
Motor / Motion Controllers & Driversr
Datasheets

Specifications of EVAL6730

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Power - Output
66W
Voltage - Output
3.3V
Current - Output
20A
Voltage - Input
4.5 ~ 14V
Regulator Topology
Buck
Frequency - Switching
400kHz
Board Type
Fully Populated
Utilized Ic / Part
L6730
Input Voltage
8 V to 52 V
Product
Power Management Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
L6208
Other names
497-5501

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Part Number
Manufacturer
Quantity
Price
Part Number:
EVAL6730
Manufacturer:
ST
0
AN1451 APPLICATION NOTE
1
2
3
4
5
2/43
INTRODUCTION ................................................................................................................................1
DESIGNING AN APPLICATION WITH L6208 ...................................................................................3
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10 EN pin ....................................................................................................................................12
2.11
2.12
2.13
2.14
2.15
2.16
APPLICATION EXAMPLE................................................................................................................30
3.1
APPENDIX - EVALUATION BOARDS .............................................................................................31
4.1
4.2
4.3
REFERENCES.................................................................................................................................43
2.11.1 Off-time Selection and minimum on-time ........................................................................15
2.11.2 Decay Modes ..................................................................................................................16
2.13.1 Maximum output current vs. selectable devices..............................................................22
2.13.2 Power Dissipation Formulae for different sequences ......................................................22
4.2.1 Important Notes ................................................................................................................34
4.2.2 Thermal Impedance .........................................................................................................34
4.3.1 Important Notes ................................................................................................................39
4.3.2 Thermal Impedance .........................................................................................................39
Current Ratings ........................................................................................................................3
Voltage Ratings and Operating Range ....................................................................................3
Choosing the Bulk Capacitor....................................................................................................5
Layout Considerations .............................................................................................................6
Sensing Resistors ....................................................................................................................8
Charge pump external components .........................................................................................9
Sharing the Charge Pump Circuitry .......................................................................................10
Reference Voltage for PWM Current Control.........................................................................11
Input Logic pins ......................................................................................................................12
Decay mode, sensing resistors and reference voltage. .........................................................30
PractiSPIN..............................................................................................................................31
EVAL6208N ...........................................................................................................................33
EVAL6208PD .........................................................................................................................38
Programmable off-time Monostable ......................................................................................13
Over Current Protection ........................................................................................................18
Power Management ..............................................................................................................21
Choosing the Decay Mode....................................................................................................25
Choosing the Stepping Sequence.........................................................................................26
Microstepping........................................................................................................................27
Table of Contents

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