參數(shù)資料
型號(hào)： L584
廠商： 意法半導(dǎo)體
英文描述： MULTIFUNCTION INJECTION INTERFACE
中文描述： 多功能注射液界面
文件頁(yè)數(shù)： 10/13頁(yè)
文件大?。?/td> 178K
代理商： L584
To have a very short off time when the L584 input
goes LOW, aninternal zeneris availableon pin 16.
This zener is used withan external divider, R8, R9,
as shownin figure 2. Suitable values can be found
from:
V
pin 16
15V+ V
BEQ2
+ VRsense
R9 + R8
R8
V
CQ2
V
pin 16
.
(V
CQ2
is thevoltageat thecollectorofQ2.V
CQ2
max
is 47Vif thepin8 is usedfor slow recirculationas in
fig. 2).
To ensurestability,asmall capacitor(about200pF)
must beconnectedbetweenthe baseandcollector
of Q2when pin 16 is used.
A differentopportunityfora fastoff timeis basedon
the use of the externalzener diode Dz. In this case
also themaximum Dz voltagevalueis 47V.
LOAD DUMP PROTECTION
To protectthedeviceagainstthepositiveloaddump
it is necessaryto connectpin 1 to V
S
. In thiscase,
if V
S
ishigher than32V,the deviceturns offQ
2
and
turns on Q
1
. Theexternalresistor R
6
must be used
(see application circuit) to avoidthat pin 8 voltage
exceeds50V duringload dump. R
6
mustbe :
V
DUMP
– V
8
R
6
>
I
dp
where V
DUMP
is the dump voltage value and V
8
:
4.75V < V
8
< 47V.
ForthisR
6
value,theminimum supplyvoltageV
Smin
guaranteeingQ1 operationis given by :
V
Smin
=
R6
Ip
B
Q1
(+
2
)
V
BEQ1
R
5
+
V
8sat
In relationto V
Smin
it isno moreverified I
dp
= 35 I
ref
(typ) even if the system correct operation is com-
pletely guaranteed.
The L584 application circuit suggested in these
notesallowsthe useof inductiveloadswith thelow-
estpossibleseries resistance(compatiblewith con-
structionalrequirements)andthereforereducesno-
tablythe powerdissipation.
For example, an electronic injector driven from
14.4Vwhich draws 2.4A has a series resistanceof
6
anddissipates34.56W.Usingthiscircuitainjec-
torwith a1
seriesresistancecanbe usedandthe
power dissipationis :
P
d
=R
L
I
L2
+ V
D
I
L
(1–
σ
) + V
sat
IL
σ
+ R
S
I
L2
σ
whereR
L
= resistance of injector = 1
V
D
= drop across diode, V
D
1V
V
sat
= saturationvoltage of Q2,
1V
R
S
= R11 = 185m
σ
= duty cycle = 20%
therefore:
Pd
5.76+ 1.92+ 0.48+ 0.21 = 8.37W
This given two advantages: the size (and cost) of
the injector is reduced and the drive current is re-
ducedfrom 2.4A to about0.4A.
Theapplicationcircuitoffigure9isverysimilar tofig-
ure2 exceptthat itshows the use of two supplies:
onefor the control circuit, one for the power stage.
L584
10/13
相關(guān)PDF資料
PDF描述
L585 CAR ALTERNATOR REGULATOR
L585D1 CAR ALTERNATOR REGULATOR
L5950 MULTIPLE MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO
L5951 TRIPLE OUTPUT MULTIFUNCTION VOLTAGE REGULATOR FOR CAR RADIO WITH IDR/CLASS 2 INTERFACE
L5952 MULTIPLE MULTIFUNCTION VOLTAGE REGULATOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L585 制造商:STMicroelectronics 功能描述:V.REG FOR ALTERNAT - Rail/Tube
L585D1 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 3-Phase Alternator RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
L5871 制造商:HAMAMATSU 制造商全稱:Hamamatsu Corporation 功能描述:Plastic package LED for camera auto-focus
L58830 制造商:OSRAM 功能描述:LAMP T8 WW 1500MM 58W 制造商:OSRAM 功能描述:LAMP, T8, WW, 1500MM, 58W 制造商:OSRAM 功能描述:LAMP, T8, WW, 1500MM, 58W; Lamp Base Type:T8; Power Rating:58W; Luminous Flux:5200lm; Length:1.5m; Bulb Diameter:26mm; Colour Temperature Typ:3000K; SVHC:No SVHC (19-Dec-2012); Colour:Warm White; External Depth:26mm; External ;RoHS Compliant: Yes
L58835 制造商:OSRAM 功能描述:LAMP T8 W 1500MM 58W 制造商:OSRAM 功能描述:LAMP, T8, W, 1500MM, 58W 制造商:OSRAM 功能描述:LAMP, T8, W, 1500MM, 58W; Lamp Base Type:T8; Power Rating:58W; Luminous Flux:5200lm; Length:1.5m; Bulb Diameter:26mm; Colour Temperature Typ:3500K; SVHC:No SVHC (19-Dec-2012); Colour:White; External Depth:26mm; External ;RoHS Compliant: Yes
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

*
*
*