CS290 Datasheet, PDF (3/4 Pages) Cherry Semiconductor Corporation – Ignition Controller

Electrical Characteristics: 6V < V_B < 16V, −30°C < T_A < 125°C
PARAMETER
TEST CONDITIONS
MIN TYP
s Dwell: continued
Excess Dwell @ 200Hz
V_BAT = 14V
14
(Run Mode)
Reduced Dwell Threshold
16.6
Reduced Dwell Hysteresis
200
Reduced Dwell
V_BAT = 20V
4.0
MAX UNIT
20.8
%
21.0
V
800 mV
6.0
%
PACKAGE PIN #
14 lead PDIP
1
2
16 lead SO wide
CS290 CS291
6
6
2
3
3
3
4
4
4
5
5
5
NC
6
7
7
7
8
8
8
9
9
9
10
10
10
11
11
11
12
12
12
1,13,16 1,2,16
13
14
14
14
15
15
NC
NC
13
Package Pin Description
PIN SYMBOL
FUNCTION
Gnd
MB
AC
25/75
V_IN+
V_IN−
Start
V_CC
D
CVS
OUT
NC
CS
BI
Test
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.
Typical Performance Characteristics
Timing Diagram, I_COIL vs. Time
Dwell Time
Normal Run Mode 17.5%
40 ^{High Voltage Mode 5.0%}
Start Mode
50.0%
30
20
10
0
Time
Current
Limit
Dwell Time
Spark Plug
Fires
3