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UM1771 数据表(PDF) 13 Page - STMicroelectronics |
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UM1771 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 38 page  DocID026392 Rev 2 13/38 UM1771 General description 38 3.3 Charge pump The L6474 device uses an internal charge pump for driving correctly the integrated MOSFETs, a voltage higher than the motor power supply. The charge pump is obtained through an oscillator and few external components. Figure 8. Charge pump circuitry Table 3. Recommended operating conditions Symbol Parameter Test condition Value Unit VDD Logic Interface supply voltage 3.3 V VS Motor supply voltage VSA = VSB = VS 8 ÷ 45 V VOUT_diff Differential voltage between VSA, OUT1A, OUT2A, PGND and VSB, OUT1B, OUT2B, PGND pins VSA = VSB = VS Up to 45 V VREG in Logic supply voltage VREG internal 3 V VADC Integrated ADC input voltage range (ADCIN pin) 0 ÷ VREG V |
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