R1511 Datasheet, PDF (5/20 Pages) RICOH electronics devices division – Input Voltage Range 3.5V to 36V

Power Dissipation (HSOP-6J)
R1511x
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
Measurement Conditions
High Wattage Land Pattern
Environment
Board Material
Board Dimensions
Copper Ratio
Through-hole
Mounting on Board (Wind velocity=0m/s)
Glass cloth epoxy plastic (Double-sided)
50mm * 50mm * 1.6mm
90%
φ0.5mm * 44pcs
Standard Land Pattern
Mounting on Board (Wind velocity=0m/s)
Glass cloth epoxy plastic (Double-sided)
50mm * 50mm * 1.6mm
50%
φ0.5mm * 44pcs
Measurement Result
Power Dissipation
Thermal Resistance
High Wattage Land Pattern
2000mW
50°C/W
Standard Land Pattern
1700mW
59°C/W
(Ta=25°C)
Free Air
540mW
185°C/W
26 00
24 00
2200 ²⁰⁰⁰
20 00
1800 ¹⁷⁰⁰
16 00
14 00
12 00
10 00
800 ⁵⁴⁰
6 00
4 00
2 00
0
0
25
On Board
(High Wattage Land Pattern)
On Board
(Standard Land Pattern)
単F体re宙e A吊irり
105
50 75 100 125 150
Ta (°C)
Power Dissipation
50
50
18
20
High Wattage
Standard
Measurement Board Pattern
IC Mount Area Unit: mm
5