UTC-IC 93334

UNISONIC TECHNOLOGIES CO., LTD
93334
LINEAR INTEGRATED CIRCUIT
HIGH ENERGY IGNITION
CIRCUIT
DESCRIPTION
This device is designed to use the signal from a reluctor type
ignition pickup to produce a well controlled output from a power
darlington output transistor.
SOP-8
FEATURES
* Very Low Peripheral Component Count
* No Critical System Resistors
* Wide Supply Voltage Operating Range (4.0V ~ 24V)
* Overvoltage Shutdown (30V)
* Dwell Automatically Adjusts to Produce Optimum Stored Energy
without Waste
* Externally Adjustable Peak Current
* Transient Protected Inputs and Outputs
*Pb-free plating product number: 93334L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
93334-S08-R
93334L-S08-R
93334-S08-T
93334L-S08-T
Package
Packing
SOP-8
SOP-8
Tape Reel
Tube
93334L-S08-R
(1)Packing Type
(1) R: Tape Reel, T: Tube
(2)Package Type
(2) S08: SOP-8
(3)Lead Plating
(3) L: Lead Free Plating, Blank: Pb/Sn
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Copyright © 2005 Unisonic Technologies Co., Ltd
1 of 5
QW-R121-006,A
93334
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
POWER GND
1
8
IL
SENS GND
2
7
OUT
UTC 93334
C
3
6
VCC
S1
4
5
S2
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R121-006,A
93334
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM AND TYPICAL APPLICATION
Figure 1
RBAT
300
CFilter
0.2
R1
20k
Reluctor
Pickup
1.35H
C1*
470
5
R
12k
+
-
S1
R2
20k
C2*
0.01
S2
Input
Comparator
with
Hysteresis
RDRIVE
100
Power
Output
&OVP
4
C
3
Ignition
Coil
Primary
8.0mH
RGAIN
5.0k
+
-
Dwell
Reference
Buffer
CDWELL
0.1
Current
Limit
Sense
RD2
100
UTC 93334
2
**BU941
RD1
35-350
RS
0.075
1
* Optional parts for extended transient protection
Power Ground
** 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
Component Values
Pickup
Coil
RL
RA, RB
C1, C2
RBAT
CFilter
CDWELL
RGAIN
RD2
RS
RDRIVE
RD1
Series resistance = 800Ω±10% @ 25℃, inductance= 1.35H @ 1.0kHz @ 15Vrms
Leakage L=0.6mH, primary R=0.43Ω±5% @ 25℃, primary L=7.5mH ~ 8.5mH @ 5.0A
Load resistor for pickup=10Ω±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 VBAT =4.0V) =300Ω±20%
Transient filter on VCC, non-critical
Stores reference, circuit designed for 0.1µF±20%
RGAIN/RD1 sets the DC gain of the current regulator =5.0k±20%
RD2/RD1 set up voltage feedback from RS
Sense resistor (PDAG in thick film techniques) =0.075Ω±30%
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
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)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R121-006,A
93334
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATING
UNIT
24
Power Supply Voltage-Steady State Transient 300ms or less
VCC
V
90
300
mA
Output Sink Current-Steady State Transient 300ms of less
IOUT(SINK)
1.0
A
Power Dissipation
1.05
W
PD
Derate above 25°C
12
mW/°C
Junction Temperature
TJ
+125
°C
Operating Temperature
TOPR
-20~+85
°C
Storage Temperature
TSTG
-40 ~ 150
°C
Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The device is guaranteed to meet performance specification within 0℃~+70℃ operating temperature range
and assured by design from -20℃~+85℃.
ELECTRICAL CHARACTERISTICS (VCC = 13.2VDC, circuit of Figure 3, unless otherwise specified)
PARAMETER
Internal Supply Voltage, Pin 6
SYMBOL TEST CONDITIONS
VBAT =4.0VDC
VBAT =8.0VDC
VCC
VBAT =12.0VDC
MIN
VBAT =14.0VDC
Ignition Coil Current Peak,
Cranking RPM 2.0Hz ~ 27Hz
IPEAK
Ignition Coil Current Peak, Normal RPM
IPEAK
Ignition Coil On-Time, Normal RPM Range
TON
Shutdown Voltage
VBAT
Input Threshold (Static Test)
VTHR
Input Threshold Hysteresis
VHYS
Input Threshold (Active Operation)
VTHR
VBAT =4.0VDC
VBAT =6.0VDC
VBAT =8.0VDC
VBAT =10.0VDC
F=33Hz
F=133Hz
F=200Hz
F=267Hz
F=333Hz
F=33Hz
F=133Hz
F=200Hz
F=267Hz
F=333Hz
Current Limit Reference, Pin 8
25
Turn-on
Turn-off
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3.4
5.2
5.3
5.4
5.5
5.5
5.4
4.4
3.4
7.5
5.0
4.0
3.0
2.3
30
360
90
VBAT =10VDC
VCE(SAT) VBAT =30VDC
VBAT =50VDC
VREF
UNIT
VDC
APEAK
APEAK
14.0
5.9
4.6
3.6
2.8
35
VDC
mVDC
1.8
1.5
120
ms
mVDC
75
Turn-on
Turn-off
60
UNISONIC TECHNOLOGIES CO., LTD
MAX
11.8
3.0
4.0
4.6
5.1
5.1
5.1
4.2
3.4
2.7
Total Circuit Lag from ts (Figure 1) until Ignition
Coil Current Falls to 10%
Ignition Coil Current Fall Time (90% ~ 10%)
Saturation Voltage IC Output (Pin 7)
(RDRIVE = 100Ω)
TYP
3.5
7.2
10.4
4.0
120
280
540
160
VDC
120
µs
µs
mVDC
190
mVDC
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QW-R121-006,A
93334
LINEAR INTEGRATED CIRCUIT
LGNITION COIL CURRENT VERSUS FREQUENCY / PERIOD
IOUT (A)
6.0
5.5
5.0
VBAT =13.2VDC
Slope=
VBAT -1.5V
8.0mH
4.0
3.0
2.0
1.0
333
200
133
5
100
70
10
50
15
20
33
25
30
ms
Frequency, f (Hz)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-006,A