STUSB4710 datasheet(20/34 Pages) STMICROELECTRONICS

部件名	STUSB4710

功能描述	Autonomous USB PD controller with integrated discharge path

PDF	34 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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20 / 34 page

Typical use cases

STUSB4710

20/34

DocID030499 Rev 4

Typical use cases

7.1

Power supply

– buck topology

Figure 8: Power supply - buck topology

The STUSB4710 offers the possibility to have up to 5 PDOs using (GPIO0 to GPIO3).

For example PDO1:5V 3A (no GPIO grounded), PDO2:9V 3A (GPIO0 to GND), PDO3:12V

3A (GPIO1 to GND), PDO4:15 V (GPIO2 to GND), PDO5: 20 V (GPIO3 to GND).

Table 12: Resistor value

PDO

VOUT

Computation

Resistor value (Ω)

200 k

��2 =

��1 ∙ 1.22

�� − 1.22

13 k

��3 =

��1 ∙ 1.22

�� − 1.22

− ��2

4k7

��4 =

��1 ∙ 1.22

�� − 1.22

− ��2 − ��3

4k87

��5 =

��1 ∙ 1.22

�� − 1.22

− ��2 − ��3 − ��4

8k66

��6 =

��1 ∙ 1.22

�� − 1.22

− ��2 − ��3 − ��4 − ��5

33 k

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