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Thin Film Components

Low R-Value Thin Film Chip Resistors

DATA BOOK
Thin Film Components
Low R-Value Thin Film Chip Resistors
SUSUMU CO., LTD.
Low R-Value Thin Film Chip Resistors(Resistor for current detection)
Structure
Protection film Resistance film
Electrode Wrap around electrode Alumina substrate
Features
Specifications
Dimension (mm) L W P T Dimension (mm) L W P T RL3720 3.75 0.30 2.00 0.20 0.40 0.20 0.40 0.10 RL0510 (0402) 1.00 0.10 0.50 0.10 0.20 0.10 0.35 0.10 RL3720W 3.75 0.30 2.00 0.20 0.40 0.20 0.40 0.15 / 0.10 RL1220 (0805) 2.00 0.02 1.25 0.20 0.40 0.20 0.40 0.10 RL7520 7.50 0.30 2.00 0.20 0.40 0.20 0.40 0.10 RL1632 (1206) 3.20 0.20 1.60 0.20 1.00 0.15 0.50 0.15 RL7520W 7.50 0.30 2.00 0.20 0.40 0.20 0.40 0.15 / 0.10 RL3264 (2412) 6.40 0.20 3.20 0.20 2.00 0.15 0.50 0.15 L P T
electric characteristics
Type Power Resistance Tolerance
(code) Temperature Coefficient of Resistance (ppm / C) Resistance Values 0
Resistance range (ohm) 0.022 0.075
Package Type Power Resistance Tolerance
Referance range(ohm)
Temperature Coefficient of Resistance (ppm / C) Resistance Values
Package
E 6 10, 000pcs / reel
Application
Typically used with control IC for power supply protection circuits, charging / discharging control circuits of battery-packages, and motor control circuits.
For power supply protection and motor control application (1) A protection circuit (2) To control the current and function Power supply: To control the charge or discharge current and stabilize load. Motor: To control the rotation speed, either steady or variable. protection circuits
Re : Current sensor When loading current is low, current flows in direction 1. When loading current is increased to a certain level and turns Tr2 on, 1 current flows in direction 2 and turns off Tr1. Let Re be 0.2 ohm: When I is 1 ampere, voltage between B and E is 0.2 volt. 2 Tr2 When I is 2 amperes, voltage between B and E is 0.4 volts. When I is 3 amperes, voltage between B and E is 0.6 volts and turns Tr2 on. Load Tr1
E Compare to conventional type low ohmic chip resistors, the structure of this RL-series has higher thermal dissipation (patent No 2963671) rate, able to assure lower surface temperature rising and lower thermal effect on surrounding parts. Strongly recommended component.
control circuit
A basic voltage-to-current converter Assume Vi is the input voltage on the current sensor, then output
R1 R2 input voltage Vi R3 15V Rs
current Io could be formulated as follows: o Load Vi Rf R1 Rs
The output current is controllable and independent of load R.
Excellent initial characteristics, large heat dissipation, low temperature rise and excellent temperature characteristics assure high accuracy, contributing to longevity of battery packages.
Resistance Distribution
RL0510
RL1220
2.0 1.5 1.0 0.5 0 0.5 1.0 1.5 2.0 R033 R068 R47 Assurance range
RL1632
RL3264
RL3720, RL3720W
RL7520, RL7520W
R005 is for RL7250W only
Temperature Coefficicient of Resistance Distribution
Temperature Coefficicient of Resistance (ppm / C) 300 n 50 Temperature Coefficicient of Resistance (ppm / C) 300 n 50
Assurance range
200 Assurance range
Assurance range
R10 100
R10 Low TCR
RL0510
Temperature Coefficicient of Resistance (ppm / C) 300 Assurance range Temperature Coefficicient of Resistance (ppm / C) n 50 300 Assurance range
RL1220
Assurance range R033 R068 R47
RL1632
RL3264
Temperature Coefficicient of Resistance (ppm / C)
Assurance range (Guaranteed range)
Temperature Coefficicient of Resistance (ppm / C)
n Assurance range (Guaranteed range)
Assurance range (Guaranteed range) R005 Assurance range (Guaranteed range) R01 R10
Assurance range (Guaranteed range) R022 R01
RL3720, RL3720W
RL7520, RL7520W
R005 is for RL7250W only
Differential increase in surface temperature ( C)
220 200 180 160 140 120 100 80 60 apply 0.75 watt 40 apply 0.5 watt 20 0 0 5 apply 1 watt
Differential increase in surface temperature ( C)
Pad size (S)
WL Dimension W
Pad size (S)
Dimension W
Chip resistance land patterns apply 2 watt Dimension L (27mm)
Chip resistance Dimension L (27mm) land patterns
apply 1 watt apply 0.5 watt 5 10 15 20 25 Dimension W (mm)
RL3720W(Rated 1W)
20 25 Dimension W (mm)
RL7520W(Rated 2W)
Differential increase in surface temperature ( C)
300 250 apply 0.5 watt 200 150 100 50 0 0 10 Chip resistance apply 0.25 watt land patterns
Differential increase in surface temperature ( C)
Dimension W (4.15mm)
300 250 200 150 100 apply 0.25 watt 50 0 0 10
Dimension W (7.9mm) apply 1 watt apply 0.75 watt apply 0.5 watt Chip resistance land patterns
Dimension L
RL3720W(Rated 0.5W)
20 30 Dimension L (mm)
RL7520(Rated 1W)
30 Dimension L (mm)
Low ohmic resistor receive internally the effects of thermal electromotive force. We minimize the effects of thermal electromotive force of our low ohmic resistors through thin film technology. The effect of thermal electromotive power could be detected by measuring polarization of its resistance values.
0.02 Changes in resistance value ( ) Sample:RL7520-R10-F
RL7520W-R10 RL7520-R10 150 Limit voltage (W)
0.015 0.01 0.005 0 0.005 0.01 0.015 0.02 2A 0C 2A 25 C 2A 70 C 3A 0C 3A 25 C 3A 70 C
100 RL3264-R050 RL3720-R075 RL1632-R050 50 RL1220-R10 0 0.001 0.01 0.1 pulse width (sec) 1 10
resistance polarization
Reliability Test DATA
Load Life Test
Test conditons:70 C Apply rated voltage for 90 minutes followed by 30 minute intermission. This cycle is repeated for 1, 000 hours.
100 Time (hrs)
Moisture Load Life Test
100 Time (hrs)
Recommended land patterns
land Chip resistor Board thickness:1.6mm, Board material:glass fabric epoxy resin, Copper film thickness:0.035mm Solder resist coating land Chip resistor Solder resist coating
RL0510 Recommended land pattern
RL1220 Recommended land pattern
Terminal for voltage measurement Chip resistor 0.5
Solder resist coating
Terminal for voltage measurement Chip resistor 0.5
Solder resist coating
RL1632 Recommended land pattern
RL3264 Recommended land pattern
Long-side electrode type Recommended land patterns
land voltage measurement line Solder resist coating
a c b a RL3720 RL3720W RL7520 RL7520W 27.0 27.0 27.0 27.0
b 4.0 4.0 4.0 4.0
c 1.2 1.2 1.2 1.2
d 4.2 7.9 7.9 15.8
dimension:mm
chip Resistor