DC/DC Converter
BUS CONVERTER
Programmable, Single Ou4tp8uVt, i1n.1,V1-21V.8o5uVto@ut @2060AA
Features
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48vin, Isolated, 4:1 Fixed Conversion Ratio (12v Nominal Out)
240watt Max Output
Parallel For Higher Output Power
±10% Current Share Accuracy
Over-Temperature Protection
96% Efficiency
Remote Enable (Primary Side)
Positive or Negative Enable Logic
Current Limit
ement Model
Industry Standard ¼ Brick Footprint
or Replac
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or
t
c
a
OBSOLETE PRODUCT
t F
This product is not fuse protected. User is responsible for providing system protection.
ntac
o
C
Consult factory for application information.
Table 1:
Input Characteristics
Notes and Conditions (1)
Min
Typ
Max
Units
Input Voltage Operating Range
Input Voltage Absolute Maximum
Input Undervoltage Lockout
36
48
55
Vdc
Vdc
Vdc
Vdc
Adc
mA
60
Turn-on Threshold
36.5
34.5
37.6
35.5
Turn-off Threshold
Maximum Input Current
No-Load Input Current
Steady-State (20Amp output)
Enable state, on Load (48Vin)
Disabled State (48V input)
5.1
72
21
Disabled Input Current
mA
Input Reflected Ripple Current (2)
Inrush Current Transient
50
mArms
A2s
Vdc
Vdc
Vdc
Vdc
0.20
Enable - Negative Logic Version
Internal 10K pull-up to 6.2V
On State Range
Off State Range
On State Range
Off State Range
-0.6
0.8
0.7
6.2
6.2
0.7
Enable - Positive Logic Version
Internal 100K pull-down to gnd
0.8
-0.6
Table 2:
Output Characteristics
Notes and Conditions (1)
Min
Typ
Max
Units
Output Voltage Set Point
Output Load Regulation
Output Voltage Total Regulation
Output Ripple Voltage & Noise (3)
Output Current Operating Range (4)
Efficiency
(Vin/4) +1% / -1%
(Vin/4) + 1% / -5%
12
-3
Vdc
%
-5
1
8.5
13.9
150
20
Vdc
mVp-p
A
20 MHz Bandwidth
90
0
Io=20A, Vin=48V (See curves)
Vin present: Enable to 90% Vout
95.6
%
Turn-on Time
10
mS
1150 Eglinton Avenue East
Toronto, Ontario M3C 1H7
1-866-740-1232
4607 S.E. International Way
Milwaukie, Oregon 97222
1-971-206-2800
www.cd4power.com
QUS20-120-NHDR_084-20859-00_RevK_Jan30-2006.fm
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