參數(shù)資料
型號: PST621DFT
廠商: MITSUMI ELECTRIC CO LTD
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8
封裝: SOP-8
文件頁數(shù): 5/6頁
文件大小: 361K
代理商: PST621DFT
MITSUMI
System Reset (with battery back-up) PST620, 621
Timing Chart
VCC1
VCC2
CE
TC
RE
CE
4.2V
2.15V
VTX
Delay
Note : Connect VAC pin to VCC when not using.
AC power supply
AC rectifier or
regulator
primary side
Note 1: VTH is set at 2.0V and hysteresis voltage at 90mV.
1. Use a resistor to divide the detected voltage so that it equals VTH when monitoring regulator
primary side power supply.
2. When monitoring AC voltage rectified as in the application circuit, set so that it equals VTH by
lowering the constant and dividing with a resistor. Refer to application circuit diagram.
Note 2: VAC input and VS1 are OR, so either signal makes CE low when power outage is detected.
PST620
PST621
AC
VCC1
CE
MODE
VCC2
RESET
4.2V
3.1V
Application Circuits
VAC input : Power supply transformer secondary voltage detection
Products
to
be
discontinued
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