L484 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
fabricante
L484 Datasheet PDF : 11 Pages
| |||
L484
PIN FUNCTIONS (continued)
N°
Name
Function
14
DRIVER COLLECTOR The collector current for the internal driver which drives the external
INPUT
darlington is supplied through this pin. The external resistor R10 limits the
dissipation in the IC. The value this resistor depends on the darlington used
and on the limiting current in the coil.
15
OVERVOLTAGE
The external darlington is protected against overvoltage by means of an
LIMITATION
internal zener available at this pin. The external divider R5/R6 defines the
limitation value, typically given by :
Vovp
=
30
R5
+
5
⋅
10−3
⋅
R6
+
30
16
DRIVING STAGE Current Driver for the External Darlington. To ensure stability on the current
OUTPUT
limitation loop a capacitor C3 (typically 2.2nF, this value depending on the
darlington used) must be connected between this pin and the current
sensing input (pin 1).
ELECTRICAL CHARACTERISTICS (VS = 14.4V ; TJ = - 40 to 125°C unless otherwise specified ; referred
to the test circuit)
Symbol
VS
VIS
VTH
VSENS
VZC
VH
I7C
Parameter
Test Conditions
Operating Supply Voltage
Input Stage Voltage (pin 2 with
10KΩ resistor)
On Pick-up Thresh. Voltage at LOW RPM
(pin 2)
Current Limitation Sensing Voltage (pin 1) VS = 6 to 16V
Zero Crossing Thresh. Voltage (pin 8)
Hysteresis Voltage (pin 8)
CD WELL Charge Current
at LOW RPM
Min. Typ. Max. Unit
6
28
V
160 200 240 mV
VIS–30
VIS+30 mV
200
320 mV
3
20
60
mV
100
200 mV
0.7
3
µA
I7D
I7D/I7C
I7C
CD WELL Discharge Current
CD WELL Charge Current
Vpick-up = 0.5V ;
7
or pin 6 not connected
(*) Note 1
7
at HIGH RPM
8
30
µA
15
33
µA
I7D
CD WELL Discharge Current
Vpick-up = 9V
13
44
µA
I7D/I7C
Vpin3
I3
VCp
VCEsat
VZ
VOVZ
I09
VCH
ICH
(**) Note 2
Threshold Voltage
Output Current
Tamb = 25°C
(***) Note 3
Continuous Coil Current Protection Inhibit
LOW Voltage (pin 4).
Series Darlington Driver
Saturation Voltage (Vpin 14 - 16)
Ipin14 = 150mA
Ipin14 = 50mA
Zener Volt. Pin 11
Ipin11 = 140mA
External Darlington Overvoltage Protection Tamb = 25°C ;
Zener Voltage
Ipin15 = 5 to 15mA
Pin 9 Output Current in Low Status
V9 = 0V
Tachometer Signal Output LOW Voltage. ON Condition
(pin5)
Output Leakage (pin 5)
Isink = 0.5mA
OFF Condition
Vpin5 = 5V
0.7
3.2
0.85
4
V
3
µA
0
0.7
V
0.4
1
V
0.6
V
6.5
8.8
V
25
35
V
3
mA
0.7
V
10
µA
4/11
Share Link: 