CS291 CHERRY [Cherry Semiconductor Corporation], CS291 Datasheet - Page 3

• Manufacturer Part Number: CS291
• Description: Ignition Controller
• Manufacturer: CHERRY [Cherry Semiconductor Corporation]

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