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參數(shù)資料
| 型號： | L9821 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | High Side Driver(高邊驅(qū)動器) |
| 中文描述： | 高側(cè)驅(qū)動器（高邊驅(qū)動器） |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 68K |
| 代理商： | L9821 |
PIN FUNCTIONS
1. POWERSUPPLY
Supplyvoltageinput.Whenthe supply reachesthe
maximum operatingvoltage(32V)thedeviceis tur-
ned off, protecting itself andthe load.
Turningoff guaranteedfor V
S
> 41V.
2. INPUT
TTL compatibleinput.Highlevel on thispin means
outputcurrentON.Thelowlevelvoltageswitchesoff
thechargepump,thepower stageand thediagno-
sticoutputreducingto the minimumvaluethequie-
scent current.
3. GROUND
This pin mustbe connectedto ground.
4. DIAGNOSTICFEEDBACK
The diagnosticcircuit is active in inputhigh level
condition.ThisoutputdetectswithTipically45ms
delayat T
amb
= 25
°
C thefollowingfaults:
-
Overvoltagecondition.
-
Thermalshutdown.
-
Shortcircuit.Thepowerstagecurrentisinternally
limitedat 25A.
-
Open load. The openload conditionis detected
withload current < 0.6A.
The diagnosticoutput is activelow. The diagnostic
delay timeallows to avoidspuriousdiagnosys(i.e :
turn ON overcurrent,overvoltagespikes etc.).
5. POWEROUTPUT
The device is provided with short circuit protection
at Vs
≤
14.4V
ELECTRICAL CHARACTERISTICS
(V
S
= 14.4V; -40
°
C
≤
T
j
≤
125
°
C,unless otherwise specified)
Symbol
V
OP
R
ON
Parameter
Test Condition
Min.
6
Typ.
Max.
32
Unit
V
Operat. Voltage
On Resistance
Input >2V:T
j
= 25
°
C
Input >2V:Full T range
0.1
0.2
I
SC
I
DL
I
OPD
V
clamp
I
Off
Short circuit current
Over Current Detection Level
Open Load Detection Level
Output Under Voltage Clamping
Off State Supply Current
25
20
A
A
A
V
μ
A
μ
A
mA
V
V
μ
A
μ
A
Device ON
I
load
<6A Inductive
T
j
= -40 to 35
°
C
T
j
= 35 to 85
°
C
T
j
= 25
°
C
1.2
-4
100
300
-12
I
ON
V
IL
V
IH
I
I
I
LEAKD
ON State Supply Current
Input Low Level
Input High Level
Input Current
Diagnostic Output Leakage
Voltage
Diagnostic Output Saturation
Voltage
Diagnostic Delay Time
Output ON Delay Time
Output ON Rise Time
Output OFF Delay Time
Output OFF Fall Time
10
0.8
2.0
V
i
= V
threshold
VCC = 5V
Diagnostic Output
I
sink
<1.6mA
15
10
V
SATD
0.4
V
T
Dd
t
dON
t
r
t
dOFF
t
f
T
j
= 25
°
C;
T
j
= 25
°
C
T
j
= 25
°
C
T
j
= 25
°
C
T
j
= 25
°
C
45
15
65
50
100
ms
μ
s
μ
s
μ
s
μ
s
L9821
3/7
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