U2043-D08-T [UTC]
Analog Circuit, 1 Func, DIP-8;
| 型号： | U2043-D08-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | Analog Circuit, 1 Func, DIP-8 |
| 文件： | 总5页 (文件大小：234K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
U2043
LINEAR INTEGRATED CIRCUIT
FLASHER, 30-mΩ SHUNT,
PILOT LAMP TO GND OR VBATT
SOP-8
ꢀ
DESCRIPTION
The UTC U2043 is designed to use in relay-controlled automotive
flashers where a high EMC level is required. A lamp outage is
indicated by frequency doubling during hazard mode as well as
direction mode. The pilot lamp can be connected either to VBatt or
GND.
ꢀ
FEATURES
DIP-8
*Temperature and voltage compensated frequency
*Warning indication of lamp failure by means of frequency doubling
* Minimum lamp load for flasher operation ≥10 W
*Relay output with high current carrying capacity and low saturation
voltage
*Pb-free plating product number: U2043L
*Low susceptibility to EMI
ꢀ
ORDERING INFORMATION
Order Number
Package
Packing
Normal
Lead Free Plating
U2043-D08-T
U2043-S08-R
U2043-S08-T
U2043L-D08-T
U2043L-S08-R
U2043L-S08-T
DIP-8
SOP-8
SOP-8
Tube
Tape Reel
Tube
U2043L-D08-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) D08: DIP-8, S08: SOP-8
(3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R121-008,A
U2043
LINEAR INTEGRATED CIRCUIT
ꢀ
PIN CONFIGRATION
GND
VSS
1
2
3
4
8
7
6
5
SI
LD
UTC U2043
REL
OSC
VSS
OSC
ꢀ
PIN DESCRIPTION
PIN NO.
SYMBOL
GND
VSS
DESCRIPTION
1
2
3
4
5
6
7
8
IC ground
Supply voltage, VSS - Power
Relay control output (driver)
Oscillator (C1)
REL
OSC
OSC
VSS
Oscillator (R1)
Supply voltage, Sense
Lamp failure detection
Start input (10a)
LD
SI
ꢀ
THERMAL DATA
PARAMETERS
SYMBOL
RATINGS
110
UNIT
K/W
K/W
DIP-8
Thermal Resistance (Junction to Ambient)
θJA
SOP-8
160
UNISONIC TECHNOLOGIES CO., LTD
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U2043
LINEAR INTEGRATED CIRCUIT
ꢀ
FUNCTIONAL DESCRIPTION
Pin 1, GND, IC ground
In the case of battery reversal, resistor R4 to ground (-11) will protect the IC against damage. An integrated
protection circuit together with external resistances R2 and R4 limits the current pulses in the IC.
Pin 2, Supply voltage, VSS - Power
On the PCB connection, the arrangement of the supply connections to Pin 2 must be so as to ensure that, the
resistance of VSS to Pin 6 is lower than that to Pin 2.
Pin 3, Relay control output (driver)
The relay control output is a high-side driver with a low saturation voltage and capable to drive a typical automotive
relay with a minimum coil resistance of 60Ω.
Pin 4 and 5 Oscillator (C1 and R1)
Flashing frequency, f1, is determined by the R1 C1 components as follows (see Application Citcuit):
1
f1 ≈
Hz
R1 ×C1 ×1.5
where
C1 ≤ 47µF
R1 = 6.8kΩ to 510kΩ
In case of a lamp outage, the oscillator frequency is switched to the lamp outage frequency f2 with f2 ≈ 2.2 × f1.
Duty cycle in normal flashing mode: 50%
Duty cycle in lamp outage mode: 40% (bright phase)
Pin 6, Supply voltage, Sense
A minimized layer resistance from point VS/shunt to Pin 6 is recommended to accurate monitoring via the shunt
resistor.
Pin 7, Lamp outage detection
The lamp current is monitored via an external shunt resistor R3 and an internal comparator K1 with its reference
voltage of typ. 81 mV (VSS = 12V). The outage of one lamp out of two lamps is detected according to the following
calculation:
Nominal current of 1 lamp: 21W / (VSS = 12V): Ilamp = 1.75A
Nominal current of 2 lamps: 2 x 21W / (VSS = 12V): Ilamp = 3.5A.
The detection threshold is recommended to be set in the middle of the current range: Ioutage ≈ 2.7A.
Thus the shunt resistor is calculated as:
R3 = VT (K1) / Ioutage
R3 = 81mV/2.7A = 30mΩ.
Comparator K1‘s reference voltage is matched to the characteristics of filament lamps (see “control signal
threshold” in the data part).
The combination of shunt resistor and resistance of wire harness prevents Pin 7 from a too high voltage in case of
shorted lamps.
Pin 8, Start input
Start condition for flashing: the voltage at Pin 8 has to be less than VSS - 5V (flasher switch closed).
Humidity and dirt may decrease the resistance between 10a and GND. If this leakage resistance is > 5kΩ the IC is
still kept in its off-condition. In this case the voltage at Pin 8 is greater than VSS - 5V.
During the bright phase the voltage at Pin 8 is above the K2 threshold, during the dark phase it is below the K3
threshold. For proper start conditions a minimum lamp wattage of 10W is required.
UNISONIC TECHNOLOGIES CO., LTD
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U2043
LINEAR INTEGRATED CIRCUIT
ꢀ
BLOCK DIAGRAM AND APPLICATION CIRCUIT
+ VSS
+10
6
2
R3
Shunt
C1
30mΩ
Measuring comparator
4
Pilot lamp
5W
V6-81mV
K1
7
Pulse
generator
3
8
R1
K2
Relay
R2
3.8 kΩ
10a
K3
10a–Comparator
3.3 kΩ
V6-5V
5
23V
R1
1
IC Ground
5W 21W 21W
21W 21W 5W
100Ω
Indicator lamps
Pilot lamps
GND
–11
UNISONIC TECHNOLOGIES CO., LTD
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U2043
LINEAR INTEGRATED CIRCUIT
ꢀ
ABSOLUTE MAXIMUM RATINGS (Reference point Pin 1)
PARAMETERS
Pins 2, 6
SYMBOL
VSS
RATINGS
16.5
UNIT
V
Supply Voltage
Surge Forward Current
tp = 0.1ms
tp = 2ms
tp = 2ms
Pins 2, 6
Pins 2, 6
Pin 8
IFSM
IFSM
IFSM
IOUT
1.5
1.0
50
A
A
mA
A
Output Current Pin 3
0.3
DIP-8
SOP-8
DIP-8
420
mW
mW
mW
mW
°C
Power Dissipation Ta = 95°C
Power Dissipation Ta = 60°C
PD
PD
340
690
SOP-8
560
Junction Temperature
Ambient Temperature
Storage Temperature
TJ
Ta
TSTG
150
-40 ~ +95
-55 ~ +150
°C
°C
ꢀ
ELECTRICAL CHARACTERISTICS
(VSS (+10, Pins 2 and 6) = 12V. Reference point ground (-11), Ta = 25°C, unless otherwise specified)
PARAMETERS
SYMBOL
VSS(+10)
TEST CONDITIONS
MIN
TYP
MAX
1.0
UNIT
Supply Voltage Range
9~15
V
Saturation voltage, IOUT=150mA,
SS = 9V
Relay Output
VOUT
ISS
V
V
Dark phase or stand-by
Bright phase
4.5
7.0
8
mA
mA
mA
Ω
Supply current
11
0.1
Relay Output Reverse Current
Relay Coil Resistance
IOUT
RL
60
Start Delay
tON
R1
C1
First bright phase
10
510
47
ms
kΩ
µF
Frequency Determining Resistor
Frequency Determining Capacitor
6.8
Normal flashing, f1 excluding the
tolerance of R1 and C1
Basic frequency f1
Frequency Tolerance
∆f1
-5
+5
%
∆f1
∆f2
f2
47
37
53
45
%
%
Bright Period
Control frequency f2
Lamp outage
Frequency Increase
2.3xf1
97
76
87
5
Hz
mV
mV
mV
kΩ
W
2.15xf1
85
66
VR3
VR3
VR3
V
V
V
SS = 15V
SS = 9V
SS = 12V
Pin 7
91
71
81
2
Control Signal Threshold
76
Leakage Resistance
Lamp Load
RLEAK 10a to GND
PL
10
Note: Typical values under normal operation in application circuit.
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
5 of 5
QW-R121-008,A
www.unisonic.com.tw
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