B048F240T30
B 048 F 240 M 30
BCM
TM
Bus Converter
• 48 V to 24 V V•I Chip™ Bus Converter
• 300 Watt (450 Watt for 1 ms)
• High density – 1017 W/in
3
• Small footprint – 260 W/in
2
• Low weight – 0.5 oz (15 g)
• ZVS / ZCS isolated Sine
Amplitude Converter™
• Typical efficiency 96%
• 125°C operation (T
J
)
• <1 µs transient response
©
V
IN
= 38 - 53 V
V
OUT
= 19.0 - 26.5 V
I
OUT
= 12.5 A
• 3.5 million hours MTBF
• No output filtering required
K = 1/2
R
OUT
= 60.0 mΩ max
Product Description
The V
•
I Chip™ bus converter is a high efficiency (>96%),
narrow input range Sine Amplitude Converter
TM
(SAC
TM
)
operating from a 38 to 53 Vdc primary bus to deliver an
isolated 19.0 V to 26.5 V secondary. The bus converter
may be used to power non-isolated POL converters or as
an independent 19.0 – 26.5 V source. Due to the fast
response time and low noise of the bus converter, the
need for limited life aluminum electrolytic or tantalum
capacitors at the load is reduced—or eliminated—
resulting in savings of board area, materials and total
system cost.
The bus converter achieves a power density of 1017 W
/in
3
in a V
•
I Chip package compatible with standard
pick-and-place and surface mount assembly process. The
V
•
I Chip package provides flexible thermal management
through its low junction-to-board and junction-to-case
thermal resistance. Owing to its high conversion
efficiency and safe operating temperature range, the bus
converter does not require a discrete heat sink in typical
applications. Low junction-to-case and junction-to-lead
thermal impedances assure low junction temperatures
and long life in the harshest environments.
Absolute Maximum Ratings
Parameter
+In to -In
PC to -In
+Out to -Out
Isolation voltage
Output current
Peak output current
Output power
Peak output power
Case temperature during reflow
[a]
Values
-1.0 to 60
100
-0.3 to 7.0
-0.5 to 50
2,250
14.8
18.8
300
450
225
245
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
A
A
W
W
°C
°C
°C
°C
°C
°C
Notes
For 100 ms
Input to output
Continuous
For 1 ms
Continuous
For 1 ms
MSL 5
MSL 6, TOB = 4 hrs
T-Grade
M-Grade
T-Grade
M-Grade
Operating junction temperature
Storage temperature
Notes:
[b]
-40 to 125
-55 to 125
-40 to 125
-65 to 125
[a] 245°C reflow capability applies to product with manufacturing date code 1001 and greater.
[b] The referenced junction is defined as the semiconductor having the highest temperature.
This temperature is monitored by a shutdown comparator.
Part Numbering
B
Bus Converter
048
Input Voltage
Designator
F
240
Output Voltage
Designator
(=V
OUT
x10)
T
30
Output Power
Designator
(=P
OUT
/10)
Configuration
F = J-lead
T = Through hole
Product Grade Temperatures (°C)
Grade
Storage
Operating (T
J
)
T
-40 to125
-40 to125
M
-65 to 125
-55 to 125
vicorpower.com
800-735-6200
BCM™ Bus Converter
B048F240T30
Rev. 2.8
Page 1 of 12
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