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93334L-S08-T 数据表(PDF) 3 Page - Unisonic Technologies

部件名 93334L-S08-T
功能描述  HIGH ENERGY IGNITION CIRCUIT
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制造商  UTC [Unisonic Technologies]
网页  http://www.utc-ic.com
标志 UTC - Unisonic Technologies

93334L-S08-T 数据表(HTML) 3 Page - Unisonic Technologies

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93334
LINEAR INTEGRATED CIRCUIT
UNISONICTECHNOLOGIESCO.,LTD
3 of 5
www.unisonic.com.tw
QW-R121-006,A
BLOCK DIAGRAM AND TYPICAL APPLICATION
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 VCEO(SUS) = 550V is used
Dwell
Reference
Buffer
Input
Comparator
Power
Output
&OVP
Ignition
Coil
Primary
8.0mH
Power Ground
21
3
C
S1
4
S2
5
with
Hysteresis
CFilter
0.2
RBAT
300
RDRIVE
100
RGAIN
5.0k
**BU941
Current
Limit
Sense
RD2
100
RD1
35-350
RS
0.075
CDWELL
0.1
C2*
0.01
C1*
470
R
12k
R1
20k
R2
20k
UTC 93334
Reluctor
Pickup
1.35H
Component Values
Pickup
Series resistance = 800Ω±10% @ 25℃, inductance= 1.35H @ 1.0kHz @ 15Vrms
Coil
Leakage L=0.6mH, primary R=0.43Ω±5% @ 25℃, primary L=7.5mH ~ 8.5mH @ 5.0A
RL
Load resistor for pickup=10Ω±20%
RA, RB
Input buffer resistors provide additional transient protection to the already clamped
inputs=20k±20%
C1, C2
For reduction of high frequency noise and spark transients induced in pick-up and leads;
optional and non-critical
RBAT
Provides load dump protection (but small enough to allow operation at VBAT =4.0V) =300Ω±20%
CFilter
Transient filter on VCC, non-critical
CDWELL
Stores reference, circuit designed for 0.1µF±20%
RGAIN
RGAIN/RD1 sets the DC gain of the current regulator =5.0k±20%
RD2
RD2/RD1 set up voltage feedback from RS
RS
Sense resistor (PDAG in thick film techniques) =0.075Ω±30%
RDRIVE
Low enough to supply drive to the output Darlington, high enough to keep VCE(SAT) of the IC
below Darlington turn-on during load dump = 100Ω±20%, 5.0W
RD1
Starting with 35Ω assures less than 5.5A, increasing as required to set 5.5A
RD1=(IO(PEAK) RS – VREF)/((VREF/RD2)-(1.4/RGAIN))-(≈100Ω)


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