參數(shù)資料
型號(hào)： 93334L-S08-T
廠商： UNISONIC TECHNOLOGIES CO LTD
元件分類： 模擬信號(hào)調(diào)理
英文描述： HIGH ENERGY IGNITION CIRCUIT
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO8
封裝： LEAD FREE, SOP-8
文件頁(yè)數(shù)： 3/5頁(yè)
文件大?。?/td> 127K
代理商： 93334L-S08-T
93334
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R121-006,A
BLOCK DIAGRAM AND T Y PICAL APPLICAT ION
Figure 1
+
-
+
-
* Optional parts for extended transient protection
** A350V zener clamp is required when using the standard BU941
This clamp is not required if a selected version with V
CEO(SUS)
550V is used
Dwell
Reference
Buffer
Input
Comparator
with
Hysteresis
Power
Output
&OVP
Ignition
Coil
Primary
8.0mH
Power Ground
2
1
3
C
S
1
4
S
2
5
CFilter
0.2
R
BAT
300
R
DRIVE
100
R
GAIN
5.0k
**BU941
Current
Limit
Sense
R
D2
100
R
D1
35-350
R
S
0.075
C
DWELL
0.1
C
2
*
0.01
C
1
*
470
R
12k
R
1
20k
R
2
20k
UTC 93334
Reluctor
Pickup
1.35H
Component Values
Series resistance = 800
±10% @ 25
Leakage L=0.6mH, primary R=0.43
±5% @ 25
Load resistor for pickup=10
±20%
Input buffer resistors provide additional transient protection to the already clamped
inputs=20k±20%
For reduction of high frequency noise and spark transients induced in pick-up and leads;
optional and non-critical
Provides load dump protection (but small enough to allow operation at V
BAT
=4.0V) =300
±20%
Transient filter on V
CC
, non-critical
Stores reference, circuit designed for 0.1μF±20%
R
GAIN
/R
D1
sets the DC gain of the current regulator =5.0k±20%
R
D2
/R
D1
set up voltage feedback from R
S
Sense resistor (P
D
A
G
in thick film techniques) =0.075
±30%
Low enough to supply drive to the output Darlington, high enough to keep V
CE(SAT)
of the I
C
below Darlington turn-on during load dump = 100
±20%, 5.0W
Starting with 35
assures less than 5.5A, increasing as required to set 5.5A
R
D1
=(I
O(PEAK)
R
S
– V
REF
)/((V
REF
/R
D2
)-(1.4/R
GAIN
))-
≈
100
)
Pickup
Coil
R
L
, inductance= 1.35H @ 1.0kHz @ 15Vrms
, primary L=7.5mH ~ 8.5mH @ 5.0A
R
A
, R
B
C
1
, C
2
R
BAT
CFilter
C
DWELL
R
GAIN
R
D2
R
S
R
DRIVE
R
D1
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