MBR150, MBR160
http://onsemi.com
4
Use of the above model permits junction to lead thermal
resistance for any mounting configuration to be found. For
a given total lead length, lowest values occur when one side
of the rectifier is brought as close as possible to the heatsink.
Terms in the model signify:
T
A
= Ambient Temperature T
C
= Case Temperature
T
L
= Lead Temperature T
J
= Junction Temperature
R
qS
= Thermal Resistance, Heatsink−to−Ambient
R
qL
= Thermal Resistance, Lead−to−Heatsink
R
qJ
= Thermal Resistance, Junction−to−Case
P
D
= Power Dissipation
Mounting Method 1
P.C. Board with
1−1/2″ x 1−1/2″
copper surface.
Mounting Method 3
P.C. Board with
1−1/2″ x 1−1/2″
copper surface.
BOARD GROUND
PLANE
VECTOR PIN MOUNTING
Mounting Method 2
LL
LL
L = 3/8″
(Subscripts A and K refer to anode and cathode sides,
respectively.) Values for thermal resistance components are:
R
qL
= 100°C/W/in typically and 120°C/W/in maximum.
R
qJ
= 36°C/W typically and 46°C/W maximum.
NOTE 3. — HIGH FREQUENCY OPERATION:
Since current flow in a Schottky rectifier is the result of
majority carrier conduction, it is not subject to junction
diode forward and reverse recovery transients due to
minority carrier injection and stored charge. Satisfactory
circuit analysis work may be performed by using a model
consisting of an ideal diode in parallel with a variable
capacitance. (See Figure 6)
Rectification efficiency measurements show that
operation will be satisfactory up to several megahertz. For
example, relative waveform rectification efficiency is
approximately 70 percent at 2 MHz, e.g., the ratio of dc
power to RMS power in the load is 0.28 at this frequency,
whereas perfect rectification would yield 0.406 for sine
wave inputs. However, in contrast to ordinary junction
diodes, the loss in waveform efficiency is not indicative of
power loss: it is simply a result of reverse current flow
through the diode capacitance, which lowers the dc output
voltage.
ORDERING INFORMATION
Device Package Shipping
†
MBR150 Axial Lead* 1000 Units / Bag
MBR150G Axial Lead* 1000 Units / Bag
MBR150RL Axial Lead* 5000 / Tape & Reel
MBR150RLG Axial Lead* 5000 / Tape & Reel
MBR160 Axial Lead* 1000 Units / Bag
MBR160G Axial Lead* 1000 Units / Bag
MBR160RL Axial Lead* 5000 / Tape & Reel
MBR160RLG Axial Lead* 5000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*This package is inherently Pb−Free.
