TOKEN
LRC Current Strip Chip Resistors
Metal Strip
Current Sense
Chip Resistors
Ultra Low Ohm Resistor Save Space, Time,
and Money (LRC)
Preview
Providing design engineers with an economical low
ohmic value, current sense metal strip chip resistor
with high quality performance, Token Electronics
LRC Series is suitable for applications in the
automotive sector for applications that require high
power handling (Up to 3W) and low resistance 0.5mΩ.
From a certified supplier offering the automotive
quality, Token’s LRC Series gives all round superior
performance for current sensing in lamp detection,
mirrors, window lift, steering and seat controls.
As a first instance, the LRC Series displays enhanced
power handling capabilities, against other technologies.
Thermal conductivity is important for chip resistors - little heat is dissipated directly into the air, and instead, is
conducted out through the solder pads.
The heat generated from the specially constructed LRC resistor is more readily dispersed, therefore preventing
localised heating, which contributes to TCR and thermal EMF errors, premature aging and possible scorching of
the PC board.
They are rated for ambient operation from -55°C to +170°C.
The LRC Series is RoHS compliant and lead free. Contact us with your specific needs.
Features
- Low TCR ±50, ±100PPM/°C
- High Wattage Rating Up to 3W
- Customized Resistance Available
- Resistance Values from 0.5m ohms to 20m ohms
- Without Laser Trimmed with Very Low Inductance
Applications
- For NB power management.
- For MB power management.
- For Monitor power management.
- SWPS: DC-DC converter, Charger,
Adaptor.
Version 2010
http://www.token.com.tw/
rfq token.com.tw
01 of 05
TOKEN
Type
LRC12*TK**
LRC12*TE**
LRC12*TW**
LRC12*TD**G
LRC12*TD**
LRC06*TD**
Power Rating
at 80°C
1W
1W
1W
1W
1W
1W
LRC Current Strip Chip Resistors
Operating Temp.
Range
-55°C ~ +170°C
Resistance
Tolerance (±%)
1, 3, 5
Resistance
(mΩ)
2.5~3.5
4.0~5.5
6.0~7.0
11.0~15.0
0.5~2.0
1.0~10.0
TCR
(±PPM/°C)
150
100
75
50
50
50
SMD 2512, 1206 (LRC) Standard Electrical Specifications
Remark : Operating Current I = √ ( P / R ) , Operating Voltage V = √ ( P * R )
SMD 2512, 2010 (LRC) High Power Rating Electrical Specifications
Type
LRC12*TDS*
LRC12*TDS*G
LRC12*TDS*G
LRC12*TDB*G
LRC12*TDR*G
LRC12*TER*G
LRC10*TDA*
Power Rating at
80°C
2.0W
2.0W
2.0W
2.5W
3.0W
3.0W
1.5W
Operating Temp.
Range
-55°C ~ +170°C
Resistance Tol-
erance (±%)
1, 3, 5
Resistance
(mΩ)
0.5~2.0
3.5
6.5~10.0
4.0~6.0
1.0~3.0
0.5~0.75
1.0~10.0
TCR (±PPM/
°C)
50
50
50
50
50
100
50
Remark : Operating Current I = √ ( P / R ) , Operating Voltage V = √ ( P * R )
Surface Mount Chips (LRC) Packing Quantity
Type
LRC12 (2512)
LRC10 (2010)
LRC06 (1206)
Emboss Plastic Tape
2,000
2,000
2,000
(LRC) Derating Curve
100
Power Ration (%)
80
60
40
20
0
0
20
40
60 70 80 100
120 140
160 180
Ambient Temperature (°C)
Version 2010
http://www.token.com.tw/
rfq token.com.tw
03 of 05
TOKEN
Top Tape
LRC Current Strip Chip Resistors
Surface Mount (LRC) Emboss Plastic Tape Specifications
Φ D0
E
F
B
Resistor
Emboss Tape
Size
LRC12
LRC10
LRC06
Resistance
(mΩ)
W
Φ D1
T
A
P1
P2
P0
direction of unreeling
A
B
W
E
F
P0
P1
P2
ΦD0
1.50±0.10
1.55±0.05
1.55±0.05
1.55±0.05
ΦD0
1.4min
1.4min
1.4min
1.0min
T
0.81±0.1
0.80±0.1
0.85±0.1
0.87±0.1
0.50~7
0.50~15
1~10
1~10
3.40±0.1 6.73±0.1 12.0±0.1 1.75±0.1 5.5±0.05 4.0±0.1 4.00±0.1 2.0±0.05
3.40±0.1 6.75±0.1 12.0±0.1 1.75±0.1 5.5±0.05 4.0±0.1 4.00±0.1 2.0±0.05
2.85±0.1 5.55±0.1 12.0±0.2 1.75±0.1 5.5±0.05 4.0±0.1 4.00±0.1 2.0±0.05
1.90±0.1 3.60±0.1
8.0±0.2
1.75±0.1 3.5±0.05 4.0±0.1 4.00±0.1 2.0±0.05
Notice:
1. The cumulative tolerance of 10 sprocket hole pitch is ±0.2mm.
2. Carrier camber shall be not more than 1mm per 100mm through a length of 250mm.
3. A & B measured 0.3mm from the bottom of the packet.
4. t measured at a point on the inside bottom of the packet to the top surface of the carrier.
5. Pocket position relative to sprocket hole is measured as the true position of the pocket and not the pocket hole.
Low Ohmic (LRC) Environmental Characteristics
Item
Temperature Coefficient
of Resistance
Thermal Shock
Short Time Overload
Resistance to Dry Heat
Load Life
Resistance to Soldering
Heat
Solderability
Specification
Black coating Green coating
As Spec.
±0.5%+0.5mΩ
±0.5%+0.5mΩ
±1%+0.5mΩ
±1%+0.5mΩ
±0.5%+0.5mΩ
±1%
±1%
±1%
±1%
±1%
Test Method
MIL-STD-202 Method 304
+25/-30/+25/+130/+25°C
MIL-STD-202 Method 107G
-55°C~150°C, 100 cycles
JIS-C-5202-5.5
RCWV*2.5 or Max Overloading Voltage, 5 seconds
JIS-C-5202-7.2
96 hours @ +125°C without load
MIL-STD-202 M108
RCWV, 70°C, 1.5 hours on, 0.5 hours off 1000~1048
hours
MIL-STD-202F Method 210E
260±5°C, 10±1second
MIL-STD-202F Method 210E
260±5°C, 2±0.5second
95%min coverage
Remark:
Green coating can’t be work with wave soldering bath. Humidity < 80%RH; Storage Temperature: 25±3°C
04 of 05
http://www.token.com.tw/
rfq token.com.tw
Version 2010
TI Technology Forum
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