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UM1771 Datasheet(PDF) 13 Page - STMicroelectronics

Part # UM1771
Description  The EVAL6474H-DISC is a low cost development tool based
PDF  38 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM1771 Datasheet(HTML) 13 Page - STMicroelectronics

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DocID026392 Rev 2
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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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