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AN4243 Datasheet(PDF) 2 Page - STMicroelectronics

Part # AN4243
Description  The L6230 DMOS driver for three-phase brushless DC motor
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4243 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
AN4243
2/29
Doc ID 024199 Rev 1
Contents
1
L6230 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Designing an application with the L6230 . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Current ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2
Voltage ratings and operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3
Choosing the bulk capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4
Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5
Sensing resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.6
Charge pump external components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.7
Sharing the charge pump circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.8
How to generate a reference voltage for the current control . . . . . . . . . . 12
2.9
Input logic pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.10
Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.11
Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.12
Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1
Field oriented control driving method . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2
Six-step driving method with current control . . . . . . . . . . . . . . . . . . . . . . 23
3.3
Six-step driving method with BEMF zero crossing detection . . . . . . . . . . 24
4
Demonstration boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.1
EVAL6230QR demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.2
STEVAL-IFN003V1:PMSM FOC motor driver based on the L6230
and STM32F103 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3
STEVAL-IFN004V1:BLDC six-step motor driver based on the L6230
and STM8S105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28



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