24Vdc Input, 28Vdc@21.5A Output Full-brick
DC-DC Converter AGF600-24S28
Description
The AGF600-24S28 is a single output DC-DC
converter with standard full-brick outline and
pin configuration. It delivers up to 21.5A output
current with 28V output voltage. Above 93.5%
ultra-high efficiency and excellent thermal
performance make it an ideal choice to supply
power to power amplifier in telecom RF
application. Thanks to the aluminium baseplate
it can work under -40°C ~ +85°C without air
cooling.
Operational Features
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Delivering up to 21.5A output current
Ultra-high efficiency 93.5% typ. at half
load
Excellent thermal performance
Wide input range: 18V ~ 36V
No minimum load requirement
Fixed frequency operation
RoHS 6 compliant
Control Features
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Remote control function
Remote output sense
Trim function: -50% ~ +18%
Mechanical Features
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Industry standard full-brick pin-out outline
With aluminium baseplate
Pin length: 3.8mm
Safety & EMC
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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 A with external filter
Protection Features
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Input under voltage protection
Output over current protection
Output over voltage protection
Over temperature protection
Document No. 31020951
July 10, 2009
Rev 1.1
AGF600-24S28 DC-DC Converter
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Electrical Characteristics
Full operating ambient temperature range is -40°C to +85°C.
Specifications are subject to change without notice.
Parameter
Min.
Typ.
Max.
Unit
Notes & Conditions
Absolute max. ratings
Input voltage
Non-operating
50
V
100ms
Operating
36
V
Continuous
Operating temperature
-40
85
°C
Storage temperature
-55
125
°C
Input characteristics
Operating input voltage range
Input
under-voltage
lockout
18
24
36
V
Turn-on voltage
threshold
15
18
V
Turn-off voltage
threshold
14
17
V
Lockout voltage
hysteresis
1
3
V
40
A
18Vin, full load
Max. input current
No-load input current
0.5
0.7
A
24Vin
Standby Input current
0.05
0.1
A
Remote OFF
Inrush current transient rating
0.5
1
A2s
Figure 18
320
mA
Through 12μH inductor; Figure
18
Input reflected ripple current
Recommended input fuse
60
A
Fast blow external fuse
recommended Figure 13
Input filter component values (C\L)
4.7*13\0.35
μF\μH
Internal values
Recommended external input
capacitance
1000
μF
Low ESR capacitor
recommended Figure 13
24Vin, full load
Output characteristics
Output voltage set point (standard
option)
Output voltage line regulation
Output voltage load regulation
27.72
28
28.28
V
0.1
0.2
%
28
56
mV
0.2
0.5
%
56
140
mV
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AGF600-24S28 DC-DC Converter
Parameter
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Min.
Typ.
Output voltage temperature
regulation
Total output voltage range
27.20
28
Output voltage ripple and noise
Max.
Unit
0.02
%/°C
28.80
V
Over sample, line, load,
temperature & life
200
mVpp
20MHz bandwidth; Figure 18
Operating output current range
0
21.5
A
Output DC current-limit inception
23.65
30.1
A
Output capacitance
470
10000
μF
1000
Notes & Conditions
Hiccup, see Figure 12
Dynamic characteristics
Dynamic
response
Turn-on
transient
Figure 6
25% ~ 50% ~ 25%
Io,max, 0.1A/μs
840
mV
Settling time
500
μs
50% ~ 75% ~ 50%
Io,max, 0.1A/μs
840
mV
Settling time
500
μs
Recovery to within 1% Vo,nom
Full load, Figure 8
Rise time
20
200
ms
Turn-on delay time
0
200
ms
5
%Vo
Output voltage
overshoot
Test condition: see Figure 13
Recovery to within 1% Vo,nom
Figure 7
Test condition: see Figure 13
Efficiency
100% load
92.0
%
Figure 1
50% load
93.5
%
Figure 1
Electrical Characteristics (Continued)
Parameter
Min.
Typ.
Max.
Unit
Notes & Conditions
Isolation characteristics
Isolation voltage (1mA, 5s)
1500
V
Basic insulation, pollution degree 2,
input to output
1500
V
Basic insulation, pollution degree 2,
input to baseplate
500
V
Basic insulation, pollution degree 2,
output to baseplate
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AGF600-24S28 DC-DC Converter
Parameter
Min.
Typ.
4/14
Max.
Unit
Notes & Conditions
Feature characteristics
Switching frequency
230
Remote ON/OFF control
Output voltage trim range
260
290
kHz
1.5
5
mA
See Figure 14 and Figure 15
14
33
V
See Trim Characteristics of Application
Note
1
V
143
%
130
°C
Output voltage remote sense
range
Output over-voltage
protection
125
Over-temperature shutdown
105
Over-temperature hysteresis
5
115
Over full temp range; % of Vo,nom
Latch:reset by power on or remote on
Auto recovery;
Test point: see Figure 21
°C
Reliability characteristics
Calculated MTBF (telcordia )
1.5
106h
Telcordia SR-332-2006; 80% load,
300LFM, 40°C Ta
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
Frequency range: 5Hz ~ 20Hz, 20Hz ~ 200Hz, A.S.D: 1.0m2/s3, -3db/oct,
axes of vibration: X/Y/Z；Time: 30min/axis
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
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AGF600-24S28 DC-DC Converter
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Characteristic Curves
100
Efficiency(%)
95
90
85
Vin=18V
Vin=24V
Vin=36V
80
75
70
2.15
4.3
6.45
8.6
10.75
12.9
15.05
17.2
19.35
21.5
Iout(A)
Figure 1 Efficiency vs. output current, Ta=25°C, Vo=28V
IO
21.5A
100°
C
TC
Figure 2 Output power derating curve
Tc: temperature test point on baseplate, see Figure 21 for test configuration.
Figure 3 Thermal image, 24Vin, 28Vo, full load, room temperature
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AGF600-24S28 DC-DC Converter
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Figure 4 Output ripple & noise (5μs/div, 100mV/div),
see Figure 18 for test configuration
Figure 5 Input reflected ripple current (5μs/div,
20mA/div), see Figure 18 for test configuration
Figure 6 Dynamic response for 25% load step (25%
~ 50% ~ 75%) and 0.1A/μs slew rate, see Figure 13
for test configuration, CH1-output voltage (500mV/div);
CH2-output current (5A/div)
Figure 7 Dynamic response for 25% load step (50%
~ 75% ~ 50%) and 0.1A/μs slew rate, see Figure 13
for test configuration. CH1-output voltage (500mV/div);
CH2-output current (5A/div)
Figure 8 Output voltage startup by power on,
(20ms/div), see Figure 13 for test configuration,
CH1-input voltage (10V/div); CH2-output voltage
(10V/div)
Figure 9 Output voltage shut down by power off,
(2ms/div), see Figure 13 for test configuration,
CH1-input voltage (10V/div); CH2-output voltage
(10V/div)
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AGF600-24S28 DC-DC Converter
Figure10 Output voltage startup by remote ON,
(10ms/div), see Figure 14 for test configuration,
CH1-remote ON (2V/div); CH2-output voltage
(10V/div)
7/14
Figure 11 Output voltage shutdown by remote OFF,
(2ms/div), see Figure 14 for test configuration,
CH1-remote OFF (2V/div); CH2-output voltage
(10V/div)
Vo
28V
15V
0V
0A
21.5A 23.65A
28A
Io
Figure 12 Over-current protection characteristics
（It’s only a sketch map of OCP action. Little alteration of the current value vs. voltage value would be allowed.）
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AGF600-24S28 DC-DC Converter
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Application Note
Typical Application
AGF600
Fuse
EMI Filter
In+
Out+
Vdc
Vin+
C1
C2
R1
Vo+
S+
Trim
C3
C4
Load
SIn-
Out-
Vin-
Vo-
+ON/OFF
-ON/OFF
Figure 13 Typical application
R1: 10kΩ (1W) current limiting resistor
C1: 1000μF/50V electrolytic capacitor, P/N: UPW2A471MHD (Nichicon) or equivalent caps
C2, C3: 1μF/100V X7R ceramic capacitor, P/N: C3225X7R2A105KT0L0U(TDK) or equivalent caps
C4: 7X150μF electrolytic capacitor, P/N: UUD1H151MNL1GS (Nichicon) or equivalent caps
Note: If ambient temperature is below -5°C, additional 1000μF electrolytic capacitor is needed for
output.
Fuse: External fast blow fuse with a rating of 60A. The recommended fuse model is F60AH
(100/250V).
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: 1.5kV)
Connection of remote ON/OFF terminal is shown in the Figure 14. 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, current limiting resistor
value must be set such that this maximum source current value is not exceeded. Also, the allowable
maximum reverse current flow is 5mA.
Controlling the remote ON/OFF terminal from the input side
Connect current limiting resistor R1 as shown in Figure 14.
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AGF600-24S28 DC-DC Converter
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Fuse
+Vin
R1
C1
-Vin
+ON/OFF
SW
1k
PC
1(ON/OFF)
-ON/OFF
Figure 14 Connection of remote ON/OFF control (A)
R1: Recommended resistor value: 10kΩ (1W)
Controlling the remote ON/OFF terminal from the output side
Connect the current limiting resistor R1 as shown in Figure 15.
AUX
R1
SW
1(ON/OFF)
-S
+ON/OFF
1k
-ON/OFF
Figure 15 Connection of remote ON/OFF control (B)
R1: Recommended resistor Value: 2kΩ (1/2W)
Note:
1. A decoupling capacitor of about 0.1µF between the +remote ON/OFF terminal and –remote
ON/OFF terminal is needed when input wiring is too long.
2. Current limiting resistor can also be connected to the –remote ON/OFF terminal side.
Remote ON/OFF level
Output status
Open (
