參數(shù)資料
型號(hào): MB3885PFV
廠商: FUJITSU LTD
元件分類: 穩(wěn)壓器
英文描述: 1-channel DC/DC Converter IC with Synchronous Rectifier
中文描述: 0.8 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20
封裝: PLASTIC, SSOP-20
文件頁(yè)數(shù): 20/29頁(yè)
文件大小: 239K
代理商: MB3885PFV
MB3885
20
I
OVERVOLTAGE PROTECTION CIRCUIT VOTAGE SETTING
Overvoltage conditions in the DC/DC converter output voltage can be detected by connecting external resistance
from the DC/DC converter output voltage to the
+
INC terminal (pin 9) on the respective overvoltage protection
comparator circuits (OVP comp.) .
When the output voltage of the DC/DC converter rises above the detection voltage, the overvoltage protection
comparator (OVP Comp.) output goes to “H” level, setting a latch and shutting off.
Detection voltage
V
OVP
(V) : 1.47
×
(R3
+
R4) /R4
Once the protection circuit has been activated, it can be reset by lowering the VCC voltage below the reset
voltage (1.7 V Min.) .
+
9
V
O
R3
R4
+
INC1
OVP
Comp.
1.47 V
R
Q
S
VCC
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