SI-8008HFE Allegro Microsystems Inc, SI-8008HFE Datasheet - Page 5

• Manufacturer Part Number: SI-8008HFE
• Description: IC, BUCK, REG, 5.5A, 5TO220
• Manufacturer: Allegro Microsystems Inc

Specifications of SI-8008HFE

• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Voltage: 24V
• Output Current: 5.5A
• Voltage Regulator Case Style: No. Of Pins
• Operating Temperature Range: -30°C To +85°C
• Base: RoHS Compliant
• Package / Case: TO220

SI-8008HFE
The application must be designed to ensure that the T
of the device is not exceeded during operation. To do so, it is
necessary to determine values for maximum power dissipation,
P
P
where:
P
the application, in particular any heatsink connected to the device
radiation fin. The relationships of P
represented in the Power Dissipation chart.
Because the heat dissipation capacity of the heatsink depends
substantively on how it is used in the actual application, thermal
characteristics of the application must be confirmed by testing.
The internal overtemperature protection circuit may enable when
T
D
D
D
J
V
V
I
η
efficiency performance curves for value), and
V
the Sanken FMB G16L was used, at 0.55 V and I
application design, obtain thermal data from the datasheet for
the diode.
(max), and ambient temperature, T
O
≥ 130°C.
can be calculated from input values:
x
is substantially affected by the heat conductance properties of
O
IN
F
is output current in A,
is IC efficiency in percent (varies with V
is output voltage in V,
is forward voltage for the input diode, Di. In these tests,
is input supply voltage in V,
P
D
=
V
O
⋅
I
O
⎛
⎜ ⎜
⎝
100
x
−
1
⎞
⎟ ⎟
⎠
−
D
, T
A
V
(max).
F
A
, and heatsink type is
⋅
I
Thermal Performance Characteristics
O
⎛
⎜ ⎜
⎝
IN
1
−
and I
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
V
V
O
IN
O
= 5.5 A. For
O
J
⎞
⎟ ⎟
⎠
(max)
; refer to
DC-to-DC Step-Down Converter
Overtemperature
Protection:
Output Voltage versus
Junction Temperature
V
IN
28
26
24
22
20
18
16
14
12
10
= 15 V, I
8
6
4
2
0
–40
Power Dissipation versus Ambient Temperature
O
= 10 mA
–20
Shin Etsu G746 silicon grease
0
6
5
4
3
2
1
0
0
20
20
T
40
A
(°C)
60
40
80
T
J
(°C)
100
120
60
140
160
80
180
5