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7447709821 Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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7447709821 Scheda tecnica(HTML) 2 Page - STMicroelectronics |
2 / 34 page Contents AN3151 2/34 Doc ID 17051 Rev 1 Contents 1 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1 Power stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Control stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2 Microcontroller peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.1 TIMER1: advanced control timer (TIM1) . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 AD converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 Overview of inverse buck converter . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 Average current reading methodology . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 Independent current control for a multi-string system . . . . . . . . . . . . 14 5 Firmware implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 Basic initialization of peripherals and I/O pins . . . . . . . . . . . . . . . . . . . . . 17 5.2 Peripheral settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.3 PI regulator overview and firmware implementation . . . . . . . . . . . . . . . . 19 6 Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 Experimental results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 |
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