L9820 Просмотр технического описания (PDF) - STMicroelectronics
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L9820 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
VS
Ron
Ioff
Ion
VEL
VEH
IE
Ileakd
Vsatd
tdd
tdon
tr
tdoff
tf
Vdon
Vdh
Idon
Tdon
Tdh
Parameter
Operating Supply Voltage
On Resistance
Off State Supply Current
On State Supply Current
Enable Low Level
Enable High Level
Enable Current
Diagnostic Output Leakage Current
Diagnostic Output Saturated
Voltage
Diagnostic Delay Time
Output ON Delay Time
Output ON Rise Time
Output OFF Delay Time
Output OFF Fall Time
Overvoltage Detection ON
Overvoltage Hysteresis
Overcurrent Detection ON
Overtemperature Detection ON
Overtemperature Hysteresis
Test Condition
Input > 2V, Tj = 25°C
Input > 2V, Full T range
Tj < 35°C
Tj = 85°C
0V < Vi <5V
VCC = 5V Diagnostic Output High
Isink < 3.5mA
Tj = 25°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
Tj = 25°C
Min.
6
2
25
2
0.5
150
Typ.
0.6
30
30
100
80
100
25
Max.
25
0.8
1.2
130
300
4
0.8
10
10
0.4
5
1.5
50
Unit
V
Ω
Ω
µA
µA
mA
V
V
µA
µA
V
µs
µs
µs
µs
µs
V
V
A
°C
°C
3/6
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