L497 STMicroelectronics, L497 Datasheet - Page 4

• Manufacturer Part Number: L497
• Description: HALL EFFECT PICKUP IGNITION CONTROLLER
• Manufacturer: STMicroelectronics

L497
PIN FUNCTIONS (continued)
ELECTRICAL CHARACTERISTICS (V
4/11
I
Symbol
11C
I
V
V
SENSE
T
V
I
I
I
V
16–14
SENS
V
SRC
N
14
15
16
V
V
11C
11D
T
SRC
I
I
Z15
/ I
Z3
3
5
S
P
3
5
11D
Min Op. Voltage
Supply Current
Voltage Supply
Supply Clamping Zener Voltage I
Input Voltage
Input Current
Darlington Driver Sat. Current
Current Limit. Sensing Voltage
C
CW Charge Current
Percentage of Output Current
Determining the Slow Recovery
Control Start (fig. 2), note 1
Duration of Altered Small Contr.
Ratio after SRC Function Start
(fig. 2)
External Darlington over V Prot.
Zener Voltage
Permanent Conduction Time
OVERVOLTAGE LIMIT
DRIVER COLLECTOR
W
DRIVER EMITTER
Charge Current
OUTPUT
INPUT
Name
Parameter
Current Driver for the External Darlington. To ensure stability and precision
of T
order not to change the open loop gain of the system.
R
situations.
C
external darlington type.
The darlington is protected against overvoltage by means of an internal
zener available at this pin and connected to pin 14. The internal divider
R
V
The collector current of the internal driver which drives the external
darlington is supplied through this pin. Then the external resistor R
the maximum current supplied to the base of the external darlington.
ovp
c
c
3
/R
S
and R
may be added to C
desat
2
= 14.4 V, – 40 C < T
defines the limitation value given by :
V
V
Low Status
High Status
V
I
I
V
V
V
T = 10 to 33ms
V
V
T = 10 to 33ms
VS = 5.3 to 16V
V
T = 10 to 33ms
C
R
I
I
V
C
R
22.5
Z3
14
14
15
15
3
3
5
S
S
11
S
11
11
5
R
SRC
7
P
7
C
c
3
= 6 V
= 4 V
= 70 mA
= LOW
= 50 mA
= 180 mA
= 5 mA
= 2 mA
= High
= 6 to 16 V
= 5.3 to 16V
= 5.3 to 16V
= 62 K
= 1 F
= 62K
c
values ranges are 1 to 100 nF and 5 to 30 K
= 0.5V
= 0.5V
= 0.5V
and R
= 1 F
5.10
Test Conditions
9
3
must be used. Recommended value for R
R
2
c
to obtain greater flexibility in various application
22.5
See Note 1
j
< 125 C unless otherwise specified)
Function
– 11.0
– 400
Min.
260
3.5
6.8
2.5
0.5
7.8
0.4
90
19
18
5
7
– 9.3
Typ.
22.5
21.5
320
7.5
0.7
0.8
1.1
18
94
depending on the
Max.
– 7.8
– 50
22.0
98.5
370
8.2
0.6
0.5
0.9
1.0
1.8
25
13
28
26
25
9
is 2 K
6
Unit
mA
mA
mV
limits
%
V
V
V
V
V
V
V
V
V
s
s
A
A
A
in