參數(shù)資料
型號(hào)： MB39A104
廠商： Electronic Theatre Controls, Inc.
英文描述： 2-ch DC/DC Converter IC
中文描述： 2通道直流/直流轉(zhuǎn)換器集成電路
文件頁(yè)數(shù)： 18/36頁(yè)
文件大?。?/td> 380K
代理商： MB39A104
MB39A104
18
Overcurrent Protection Circuit: Range of Operation
When an overcurrent flow occurs, if the increased voltage between the drain and source of the FET is detected
by means of the external FET (Q1) resistor, operational stability is lost when the external FET (Q1) ON interval
determined by the oscillation frequency, input voltage, and output voltage falls below 450 ns.
Therefore, the circuit should be used within a range that ensures that the ON interval does not fall below 450ns,
according to the following formula.
V
O
(V)
V
IN
(V)
×
f
OSC
(Hz)
If the ON interval of the external FET (Q1) is below 450ns, we recommend the use of an overcurrent detection
resistor RS to detect overcurrent, as shown below.
This example shows the range of operation of the overcurrent detection function with a setting of Vo = 3.3V.
ON interval 450 (ns)
≥
+
20
5
4
21
ILIM1
(ILIM2)
VS1
(VS2)
V
IN
ErrAmp
Q1
(Rs)
1600
1400
1200
1000
800
400
200
0
6
8
10
12
VCC (V)
14
f
O
16
18
20
Overcurrent Detection Function Operating Range
V
O
=
set to 3.3 V
Operation Range
Method to detect by current when external FET(Q1) is turned on
Connect to RS
when
using RS
+
20
5
4
21
ILIM1
(ILIM2)
VS1
(VS2)
VIN
R
S
ErrAmp
Q1
1600
1400
1200
1000
800
600
400
200
0
6
8
10
12
VCC (V)
14
f
O
16
18
20
Overcurrent Detection Function Operating Range
V
O
=
set to 3.3 V
Operation Range
Method to detect by mean current
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB39A104_06 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-ch DC/DC Converter IC with Overcurrent Protection
MB39A104_08 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-ch DC/DC Converter IC with Overcurrent Protection
MB39A104PFV 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-ch DC/DC Converter IC
MB39A104PFV-E1 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-ch DC/DC Converter IC with Overcurrent Protection
MB39A104PFV-G-BNDE1 制造商:Fujitsu 功能描述:obN 2 1.24V 7V to 19V 24SSOP Tube
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