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AS3722 bảng dữ liệu(PDF) 53 Page - ams-OSRAM AG

tên linh kiện AS3722
Giải thích chi tiết về linh kiện  Multi-Phase DCDC Controller PMIC
PDF  199 Pages
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nhà sản xuất  AMSOSRAM [ams-OSRAM AG]
Trang chủ  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3722 bảng dữ liệu(HTML) 53 Page - ams-OSRAM AG

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[v1-01] 2015-Sep-07
AS3722 − Detailed Descriptions- System Functions
Start-Up Reasons
A Start-up can be activated from 8 different sources:
• VPOR has been reached (VSUP/VBAT rising from scratch)
• ONKEY has been pulled high in power_off mode
• AC_OK has been pulled high in power_off mode
• LID has been pulled high in power_off mode
• RTC wake_up has been detected in power_off mode
• Reset cycle
• Soft Reset cycle
• ResVoltRise was reached
Start-Up From Multiple Batteries
If the system is powered by a single battery the start-up looks
like below.
Figure 51:
Start-Up From Single Cell Batteries
Start-Up From Single Cell Batteries: Shows basic start-up from a single cell battery (VBAT and VSUP tied
together)
For multi cell batteries or supplies greater 5V, the system needs
a 5V pre-regulator to power the AS3722. The AS3722 is
monitoring the battery voltage (VBAT ) and controls the enable
signal (EN5V) for the external 5V pre-regulator for generating
a 5V system supply (VSUP).
VBAT rise = ResVoltRise programmed in OTP
Start-up sequence
t (not to scale)
VBAT/VSUP
ncells=0
Regulator Voltages
XRES
serial communication possible
res_timer
1-15ms
~4ms
debounce



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