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CS291 Datasheet(PDF) 3 Page - Cherry Semiconductor Corporation

No. de pieza CS291
Descripción Electrónicos  Ignition Controller
PDF  4 Pages
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Fabricante Electrónico  CHERRY [Cherry Semiconductor Corporation]
Página de inicio  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS291 Datasheet(HTML) 3 Page - Cherry Semiconductor Corporation

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Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
16 lead SO wide
14 lead PDIP
CS290
CS291
1
6
6
Gnd
Signal Ground.
2
2
3
MB
Master Bias. Sets up operating currents on the IC with exter-
nal resistor.
3
3
4
AC
Adaptive Capacitor. Follows the 25/75 capacitor. Voltage
trip points control the Output for setting dwell.
4
4
5
25/75
Run Capacitor. Provides 25%/75% charge and discharge
current to an external capacitor for setting dwell.
55
NC
VIN+
Input pin +.
67
7
VIN−
Input pin −.
7
8
8
Start
Input pin to put device in the “start mode”.
89
9
VCC
Supply input voltage.
9
10
10
D
Supply current to output pin.
10
11
11
CVS
Collector Voltage Sense. Input for flyback detect.
11
12
12
OUT
Output. Driver for external darlington.
12
1,13,16
1,2,16
NC
No connection.
13
14
14
CS
Current Sense. Feedback for max coil current.
14
15
15
BI
Battery Int. Input for “stall mode” of operation
NC
NC
13
Test
Factory test pin. Pin should be grounded in customer
application.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Electrical Characteristics: 6V < VB < 16V, −30°C < TA < 125°C
s
Dwell: continued
Excess Dwell @ 200Hz
VBAT = 14V
14
20.8
%
(Run Mode)
Reduced Dwell Threshold
16.6
21.0
V
Reduced Dwell Hysteresis
200
800
mV
Reduced Dwell
VBAT = 20V
4.0
6.0
%
Typical Performance Characteristics
40
30
20
10
0
Time
Current
Limit
Spark Plug
Fires
Dwell Time
Dwell Time
Normal Run Mode 17.5%
High Voltage Mode
5.0%
Start Mode
50.0%
Timing Diagram, ICOIL vs. Time



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