參數(shù)資料
型號(hào)： MB3788
廠商： FUJITSU LTD
元件分類： 穩(wěn)壓器
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 0.03 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO24
封裝： PLASTIC, SSOP-24
文件頁(yè)數(shù)： 14/21頁(yè)
文件大?。?/td> 750K
代理商： MB3788
14
MB3788
I
HOW TO SET TIME CONSTANT FOR TIMER & LATCH-TYPE SHORT-CIRCUIT
PROTECTION CIRCUIT
If the load conditions of the switching regulator are stable, the outputs of comparators 1 and 2 do not change, so the SP comparator outputs a
High level. At this time, the SCP pin (pin 15) is held at about 50 mV.
If the load conditions change suddenly due to a load short-circuit, for example, the output voltage of the comparator of the channel becomes a
High-level signal (more than 2.1 V). Then, the SVP comparator outputs a Low level and transistor Q1 is turned off. The short-circuit protection
capacitor C
PE
externally connected to the SCP pin starts to charge.
V
PE
= 50 mV + t
PE
×
10
-6
/C
PE
0.65 = 50 mV + t
PE
×
10
-6
/C
PE
C
PE
= t
PE
/0.6 (s)
Once the capacitor C
PE
is charged to about 0.65 V, the SR latch is set and the output drive transistor is turned off. At this time, the duty cycle
is made low and the output voltage of the SCP pin (pin 15) is held at Low level. This closes the SR latch input to discharge C
PE
.
Fig. 5 Latch-Type Short-Circuit Protection Circuit
2.1 V
Low
input
voltage
protection
circuit
SR latch-type
circuit
1
μ
A
C
PE
-
-
+
OUT
2.5 V
15
Q
2
Q
1
Comparator 1
Comparator 2
S
R
PWM
comparator
相關(guān)PDF資料
PDF描述
MB3789 RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
MB3789PFV RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
MB3790PF Battery Backup IC
MB3790 DIODE SCHOTTKY SINGLE 25V 200mW 0.32V-vf 200mA-IFM 1mA-IF 2uA-IR SOT-23 3K/REEL
MB3790PFT Battery Backup IC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MB3789 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (Supporting External Synchronization)
MB3789PFV 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller (Supporting External Synchronization)
MB3789PFV-G-BND(E1) 制造商:Fujitsu 功能描述:
MB-379 制造商:Maxxtro 功能描述:
MB3790 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Battery Backup IC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*