48Vdc Input, 48Vdc@16.7A Output Full-brick
DC-DC Converter AGF800-48S48
Description
The AGF800-48S48 is a single output DC-DC
converter with standard full-brick outline and
pin configuration. It delivers up to 16.7A output
current with 48V output voltage. Above 94.5%
ultra-high efficiency and excellent thermal
performance make it an ideal choice to supply
power to power amplifier in telecom RF
application. Aluminum baseplate structure
makes it possible for the module to work under
-40°C ~ 100°C baseplate temperature without
air cooling.
Operational Features
Delivering up to 16.7A output current
Ultra-high efficiency 94.5% typ. at half load
Excellent thermal performance
Wide input range: 36V ~ 75V
No minimum load requirement
Fixed frequency operation
RoHS 6 compliant
Mechanical Features
Industry standard full-brick pin-out outline
With aluminum baseplate
Pin length: 3.8mm
Safety & EMC
Control Features
Remote control function
Remote output sense
Trim function
Meets safety standards UL 60950-1,
IEC/EN 60950-1 and GB4943
Approved by UL and TUV
Meets 2006/95/EEC and 93/68/EEC
directives which facilitates CE marking in
user’s end product
Meets conducted emission's requirements
of EN55022 Class B with external filter
Protection Features
Input under voltage protection
Output over current protection
Output over voltage protection
Over temperature protection
Document No:
Aug. 12, 2013
Rev 1.0
AGF800-48S48 DC-DC Converter
2/15
Electrical Characteristics
Full operating ambient temperature range is -40°C to +85°C.
Full operating baseplate temperature range is -40°C to +100°C.
Specifications are subject to change without notice.
Parameter
Min.
Typ.
Max.
Unit
Notes & Conditions
Absolute max. ratings
Non-operating
100
V
100ms
Operating
80
V
Continuous
Input voltage
Operating ambient temperature
-40
85
°C
Operating baseplate temperature
-40
100
°C
Storage temperature
-55
125
°C
Input characteristics
Operating input voltage range
Input
under-voltage
lockout
36
48
75
V
Turn-on voltage
threshold
34
35
36
V
Turn-off voltage
threshold
32
33
34
V
Lockout voltage
hysteresis
1
2
3
V
30
A
36Vin, full load
Max. input current
No-load input current
0.2
0.3
A
48Vin
Standby Input current
0.02
0.1
A
Remote OFF
200
mA
Through 12μH inductor; Figure 16
Input reflected ripple current
Recommended input fuse
40
A
Fast blow external fuse
recommended Figure 11
Input filter component values (C\L)
15\0.55
μF\μH
Internal values
μF
Low ESR capacitor
recommended Figure 11
48Vin, full load
Recommended external input
capacitance
470
Output characteristics
Output voltage set point (standard
option)
47.52
48
48.48
V
0.05
0.2
%
24
96
mV
0.2
0.5
%
95
240
mV
Output voltage line regulation
Output voltage load regulation
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AGF800-48S48 DC-DC Converter
Parameter
3/15
Min.
Typ.
Output voltage temperature
regulation
Total output voltage range
46.56
Output voltage ripple and noise
Max.
Unit
Notes & Conditions
0.02
%/°C
48
49.44
V
Over sample, line, load,
temperature & life
300
480
mVpp
20MHz bandwidth; Figure 16
Operating output current range
0
16.7
A
Output DC current-limit inception
17.6
24
A
Output capacitance
680
3000
μF
1880
Hiccup, see Figure 10
Dynamic characteristics
25% ~ 50% ~ 25%
Io,max, 0.1A/μs
Dynamic
response
640
Settling time
50% ~ 75% ~ 50%
Io,max, 0.1A/μs
640
Settling time
Turn-on
transient
Figure 4
1440
mV
500
μs
1440
mV
500
μs
Recovery to within 1% Vo,nom
Full load, Figure 6
Test condition: see Figure 11
Recovery to within 1% Vo,nom
Figure 5
Test condition: see Figure 11
Rise time
300
500
ms
Turn-on delay time
200
500
ms
5
%Vo
Output voltage
overshoot
Efficiency
100% load
93.5
%
Figure 1
50% load
94.5
%
Figure 1
Electrical Characteristics (Continued)
Parameter
Min.
Typ.
Max.
Unit
Notes & Conditions
Isolation characteristics
Isolation voltage (1mA, 5s)
1500
Vdc
Basic insulation, pollution degree 2,
input to output
1500
Vdc
Basic insulation, pollution degree 2,
input to baseplate
500
Vdc
Functional insulation, pollution degree
2, output to baseplate
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AGF800-48S48 DC-DC Converter
Parameter
Min.
Typ.
4/15
Max.
Unit
Notes & Conditions
Feature characteristics
Switching frequency
260
Remote ON/OFF control
Output voltage trim range
290
320
kHz
1.5
5
mA
See Figure 12, Figure 13
24
53
V
See Trim Characteristics of Application
Note
-
V
60
V
125
°C
Output voltage remote sense
range
Output over-voltage
protection
57
Over-temperature shutdown
105
Over-temperature hysteresis
5
110
Over full temp range;
Hiccup
Auto recovery;
Test point: see Figure 19
°C
Reliability characteristics
Calculated MTBF (telcordia )
106h
1.5
Telcordia SR-332-2006; 80% load,
300LFM, 40°C Ta
Mechanical Characteristics
Parameter
Weight
Min.
Typ.
Max.
Unit
148
153
158
g
Notes & Conditions
Qualification Testing
Parameter
Unit (pcs)
Test condition
Halt test
4~5
Ta,min-10°C to Ta,max+10°C, 5°C step, Vin = min to max, 0 ~ 105% load
Vibration
3
Mechanical shock
3
30g, 6ms, 3axes, 6directions, 3time/direction
Thermal shock
3
-40°C to 100°C, unit temperature 20cycles
Thermal cycling
3
-40°C to 85°C, temperature change rate: 1°C/min, cycles: 2cycles
Humidity
3
40°C, 95%RH, 48h
Solder ability
15
IPC J-STD-002C-2007
Frequency range: 5Hz ~ 20Hz, 20Hz ~ 200Hz, A.S.D: 1.0m2/s3, -3db/oct,
axes of vibration: X/Y/Z；Time: 30min/axis
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AGF800-48S48 DC-DC Converter
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Characteristic Curves
97.00
Effiency (%)
95.00
93.00
91.00
Vin=36V
89.00
Vin=48V
87.00
Vin=75V
85.00
1.7
3.3
5.0
6.7
8.4
10.0
11.7
13.4
15.0
16.7
Output current (A)
Figure 1
Efficiency vs. output current, Ta=25°C, Tc=40°C, Vo=48V
Figure 2 Output ripple & noise (5μs/div, 50mV/div),
see Figure 16 for test configuration
Figure 3
Input reflected ripple current (2μs/div,
10mA/div), see Figure 16 for test configuration
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AGF800-48S48 DC-DC Converter
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Figure 4 Dynamic response for 25% load step (25% ~
50% ~ 25%) and 0.1A/μs slew rate, see Figure 11 for
Figure 5 Dynamic response for 25% load step (50% ~
75% ~ 50%) and 0.1A/μs slew rate, see Figure 11 for
test configuration, CH1-output voltage (500mV/div);
test configuration. CH1-output voltage (500mV/div);
CH2-output current (5A/div)
CH2-output current (5A/div)
Figure 6
Output voltage startup by power on,
(100ms/div), see Figure 11 for test configuration,
CH2-input voltage (20V/div); CH1-output voltage
(20V/div)
Figure 7 Output voltage shut down by power off,
(100ms/div), see Figure 11 for test configuration,
CH2-input voltage (20V/div); CH1-output voltage
(20V/div)
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AGF800-48S48 DC-DC Converter
Figure 8 Output voltage startup by remote ON,
(100ms/div), see Figure 12 for test configuration, CH2remote ON (50V/div); CH1-output voltage (20V/div)
Figure 10
7/15
Figure 9 Output voltage shutdown by remote OFF,
(20ms/div), see Figure 12 for test configuration, CH2remote OFF (50V/div); CH1-output voltage (20V/div)
Over-current protection characteristics
Note: It’s only a sketch map of OCP action. Little alterations of the current value vs. voltage value are allowed.
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Application Note
Typical Application
Figure 11
Typical application
R1: 20kΩ (1/2W), current limiting resistor
C1: 470μF/100V electrolytic capacitor, P/N: UPW2A471MHD (Nichicon) or equivalent caps.
C2, C3: 1μF/100V X7R ceramic capacitor, P/N: C3225X7R2A105KT0L0U (TDK) or equivalent caps
C4: 4×470μF/100V electrolytic capacitor, P/N: UPM2A471MHD (Nichicon) or equivalent caps
External fast-acting fuse with a rating of 40A should be used in the application. The recommended
fuse model is 0314040 or 0324040 from LITTELFUSE.
Remote ON/OFF
A remote ON/OFF control circuit is provided which is isolated from the input side, as well as, the
output side. (Isolation withstand voltage: 1.5kVdc).
Connection of remote ON/OFF terminal is as follows. As shown in the figure below, output voltage
turns remote ON when current is made to flow through remote ON/OFF terminal. Remote ON/OFF
terminal can be controlled by opening or closing connections (with switch or relay).
Maximum source current for remote ON/OFF terminal is 5mA. Therefore, set current limiting
resistor value such that this maximum source current value is not exceeded. Also, the allowable
maximum reverse current flow is 5mA.
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Controlling the remote ON/OFF terminal from the input side
Connect current limiting resistor R1 is shown in the following figure.
Fuse
+Vin
R1
C1
-Vin
+ON/OFF
SW
1k
PC
1(ON/OFF)
Figure 12
-ON/OFF
Connection of remote ON/OFF control (A)
R1: Recommended resistor value: 20kΩ (1/2W)
Controlling the remote ON/OFF terminal from the output side
Connect the current limiting resistor R1 is shown in the following figure.
AUX
R1
-S
+ON/OFF
SW
1(ON/OFF)
Figure 13
1k
-ON/OFF
Connection of remote ON/OFF control (B)
R1: Recommended resistor value: 2kΩ (1/2W)
Note:
1. When wiring becomes long, connect a capacitor of about 0.1µF value between the +remote
ON/OFF terminal and –remote ON/OFF terminal at a nearest distance.
2. Current limiting resistor can also be connected to the –remote ON/OFF terminal side.
3. The remote ON/OFF control mode is shown in the following table.
Remote ON/OFF level
Output status
Open (
