L9820D(1994) データシートの表示（PDF） - STMicroelectronics
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L9820D Datasheet PDF : 6 Pages
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L9820
PIN FUNCTIONS
N.
Name
1
POWER OUTPUT
4
POWER SUPPLY
5
ENABLE INPUT
7
GROUND
8
DIAGNOSTIC FEEDBACK
Description
The device is provided with short circuit protection.
Supply voltage input.
TTL compatible input. High level on this pin means output current ON.
The low level voltage switches off the charge pump, the power stage and
the diagnostic output reducing to the minimum value the quiescent current.
This pin must be connected to ground.
The diagnostic circuit is active in input high level condition. This output
detects with Tipically 50µs delay at Tamb = 25°C the following faults:
– Overvoltage condition.
– Thermal shutdown.
– Short circuit. The power stage current is internally limited at 1.5A.
The diagnostic output is active low. The diagnostic delay time allows to
avoid spurious diagnosys(i.e.: turn ON overcurrent, overvoltage spikes etc.).
ELECTRICAL CHARACTERISTICS (VS = 14.4V, –40°C≤ Tj ≤ +85°C, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
VS
Operating Supply Voltage
Ron
On Resistance
Input > 2V, Tj = 25°C
Input > 2V, Full T range
6
25
V
0.6
0.8
Ω
1.2
Ω
Io ff
Off State Supply Current
Tj < 35°C
Tj = 85°C
130
µA
300
µA
Io n
On State Supply Current
VEL
Enable Low Level
4
mA
0.8
V
VEH
IE
Ileakd
Enable High Level
2
Enable Current
0V < Vi <5V
Diagnostic Output Leakage Current VCC = 5V Diagnostic Output High
V
10
µA
10
µA
Vsat d
Diagnostic Output Saturated
Voltage
Isink < 3.5mA
0.4
V
td d
Diagnostic Delay Time
tdon
Output ON Delay Time
tr
Output ON Rise Time
tdoff
Output OFF Delay Time
tf
Output OFF Fall Time
Tj = 25°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
30
µs
30
µs
100
µs
80
µs
100
µs
Vd on
Overvoltage Detection ON
25
V
Vdh
Overvoltage Hysteresis
2
5
V
Idon
Overcurrent Detection ON
Tdon
Overtemperature Detection ON
Td h
Overtemperature Hysteresis
0.5
1.5
A
150
°C
25
50
°C
3/6
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