48Vdc Input, 2.5Vdc@35A Output
Eighth-brick Converter AVO100-48S2V5
Document No.: 31020793 June 8, 2011 Rev 1.0
Description
The AVO100-48S2V5 DC-DC converter is a
next-generation industry standard eighth-brick
with optimized ultra-high efficiency. This
module can provide up to 35A output current at
2.5V output voltage, industry standard
eighth-brick 57.9mm × 22.9mm × 9.6mm (2.28”
× 0.9” × 0.378”), which makes it an ideal choice
for small space, telecom and datacom
applications. The AVO100-48S2V5 is standard
eighth-brick pin-out configuration, with
baseplate option. It provides CNT remote
control, trim and sense functions, with OVP,
OCP, OTP full protection method. This product
can achieve ultra-high efficiency of 90.8% at
full load. A heatsink can be installed for better
thermal performance.
Operational Features
Up to 35A output current
Ultra-high efficiency 90.8% typ. at full load
Wide input range: 36V ~ 75V
Excellent thermal performance
No minimum load requirement
Intended for reflow or wave soldering
RoHS 6 compliant
Control Features
Remote control function
Remote output sense
Trim function: 80% ~ 110%
Protection Features
Input under-voltage lockout
Output over-current protection
Output over-voltage protection
Over-temperature protection
Mechanical Features
Industry standard eighth-brick
With baseplate option
Pin length option: 3.8mm
Safety & EMC
Meets safety standards UL 60950-1 2nd
edition, IEC/EN 60950-1 2nd edition and
GB4943
Approved by UL and TUV
Meets the Low Voltage Directives
2006/95/EEC with the Amendment
Directive 93/68/EEC which facilitates CE
marking in user’s end product
Materials meet UL94,V-0 flammability
rating
Meets conducted emission's requirements
of FCC Class A and EN55022 Class A
with external filter
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Electrical Characteristics
Full operating ambient temperature range is -40°C to +85°C.
Specifications are subject to change without notice. Test condition: Ta: 25°C. Air velocity: 300LFM.
Parameter Min.
Typ. Max. Unit
Notes & conditions
Absolute max. ratings
Non-operating - - 100 V 100ms
Input voltage Operating - - 80 V Continuous
Operating temperature -40 - +85 °C -
Storage temperature -55 - +125 °C -
Voltage at remote ON/OFF pin -0.7 - 12 V -
Input characteristics
Operating input voltage range 36 48 75 V -
Turn-on voltage
threshold 31 - 36 V -
Turn-off voltage
threshold 30 - 35 V -
Input
under-voltage
lockout
Lockout voltage
hysteresis 1 - 3 V -
Max. input current - - 3.5 A 36Vin, full load
No-load input current - 0.05 - A
Standby input current - 0.005 0.015 A Remote OFF
Inrush current transient rating - - 1 A
2
s Figure 15
Input reflected ripple current - - 40 mA Through 12µH inductor; Figure 15
Recommended input fuse - - 10 A External fast blow fuse is
recommended; Figure 11
Recommended external input
capacitance 100 - - µF Low ESR capacitor is
recommended; Figure 11
Output characteristics
Output voltage set point (standard
option) 2.46 2.5 2.54 V 48Vin, half load
±0.1 ±0.2 % -
Output voltage line regulation - - - mV -
±0.1 ±0.5 % -
Output voltage load regulation - - - mV -
Output voltage temperature
regulation - - 0.02 %/°C
-
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Parameter Min.
Typ. Max. Unit
Notes & conditions
Total output voltage range 2.41 2.5 2.59 V Over sample, line, load,
temperature & life
- 55 - mVpp
Figure 2
20MHz bandwidth; Figure 15
Output voltage ripple and noise
- 70 - mVpp
Ta: 25°C. Air velocity: 300LFM,
Vin: 48V, Vonom, Ionom,10u
tantalum (ESR ≤ 100mΩ)//1u
ceramic capacitor, output ≤ 12V
Operating output current range 0 - 35 A -
Output DC current-limit inception 37 - 50 A Hiccup: auto-restart when
over-current condition is removed
Output capacitance 330 - 10000
µF High frequency and low ESR are
recommended
Dynamic characteristics
25% ~ 50% ~ 25%
Io,max, 0.1A/µs - 30 - mV
Figure 4
Test condition: 25°C, nominal
input voltage, Figure 11
Settling time - 60 - µs Recovery to within 1% V
o,nom
25% ~ 50% ~ 25%
Io,max, 1A/µs - 160 - mV
Figure 5
Test condition: 25°C, nominal
input voltage, Figure 11
Dynamic
response
Settling time - 50 - µs Recovery to within 1% V
o,nom
Rise time - 5 50 ms Full load, Figure 6
Turn-on delay time - 62 200 ms -
Turn-on
transient Output voltage
overshoot - 0 - %Vo
-
Efficiency
100% load - 90.8 - % Figure 1
60% load - 91.7 - % Figure 1
20% load - 87.5 - % Figure 1
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Electrical Characteristics (Continued)
Parameter Min. Typ.
Max.
Unit Notes & conditions
Isolation characteristics
Isolation voltage (conditions:
1mA for 60s, slew rate of
2000V/10s)
2250 - - V Basic insulation, pollution degree 2,
input to output
Feature characteristics
Switching frequency - 165 - kHz -
Off-state
voltage -0.7 - 1.2 V
Remote
ON/OFF
control
(positive logic)
On-state
voltage 3.5 - 12 V
Off-state
voltage 3.5 - 12 V
Remote
ON/OFF
control
(negative
logic)
On-state
voltage -0.7 - 1.2 V
Figure 12
Output voltage trim range 2.0 -. 2.75 V See Trim Characteristics of
Application Note
Output voltage remote sense
range - - 0.2 V -
Output over-voltage
protection (dynamic) 2.95 - 4.0 V Hiccup: auto-restart when
over-voltage condition is removed
Over-temperature shutdown
- 118 - °C
Auto recovery; over-temperature
protection (OTP) test point: Figure 10.
Tested under thermal balance
condition.
Over-temperature hysteresis
- 5 - °C -
Reliability characteristics
Calculated MTBF (telcordia)
- 1.5 - 106h 300LFM, 40C Ta. Normal input/rated
output@80%load
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Electromagnetic Compatibility Requirements
Test item Regulations Criteria Notes & conditions
Conducted emission EN 55022
DC input port, class A limits /
Immunity to electrostatic
discharge
IEC/EN61000-4-2
Enclosure port, level 3 B
Immunity to electrical fast
transient
IEC/EN61000-4-4
DC input port, level 3 B
Immunity to surges
IEC/EN61000-4-5
DC input port
Line to ground (earth): 600V
Line to line: 600V
B
Immunity to continuous
conducted interference
IEC/EN61000-4-6
DC input port, level 2 A
Immunity to voltage dips and
short interruptions and voltage
variations
EN 61000-4-29
DC input port B
See EMC Test Conditions
Criterion A: Normal performance during and after test.
Criterion B: For EFT and surges, low-voltage protection or reset is not allowed. Temporary output
voltage fluctuation ceases after disturbances ceases, and from which the EUT recovers its normal
performance automatically. For dips and ESD, output voltage fluctuation or reset is allowed during
the test, but recovers to its normal performance automatically after the disturbance ceases.
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: 30 min/axis
Mechanical shock 3 30g, 6ms, 3 axes, 6 directions, 3 time/direction
Thermal shock 3 -40°C to +100°C, unit temperature 20 cycles
Thermal cycling 3 -40°C to +55°C, temperature change rate: 1°C/min, cycles: 2 cycles
Humidity 3 40°C, 95%RH, 48h
Solder ability 15 IPC J-STD-002C-2007
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Characteristic Curves
Figure 1 Efficiency vs. output current, Ta = 25°C, Vo = 2.5V, Air velocity = 300LFM
Figure 2 Output ripple & noise (5µs/div, 50mV/div),
see Figure 15 for test configuration
Figure 3 Input reflected ripple current (5µs/div,
10mA/div), see Figure 15 for test configuration
Figure 4 Dynamic response for 25% load step (25% ~
50% ~ 25%) and 0.1A/µs slew rate, (2ms/div), see
Figure 11 for test configuration; CH1-output voltage
(50mV/div); CH2-output current (10A/div)
Figure 5 Dynamic response for 25% load step (25% ~
50% ~ 25%) and 1A/µs slew rate, (2ms/div), see
Figure 11 for test configuration; CH1-output voltage
(50mV/div); CH2-output current (10A/div)
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Figure 6 Output voltage startup by power-on,
(50ms/div), see Figure 11 for test configuration;
CH1-output voltage (1V/div); CH2-intput voltage
(20V/div)
Figure 7 Output voltage shutdown by power-off,
(100ms/div), see Figure 11 for test configuration;
CH1-output voltage (1V/div); CH2-input voltage
(20V/div)
Figure 8 Output voltage startup by remote ON,
(20ms/div), see Figure 11 for test configuration;
CH1-output voltage (1V/div); CH2-remote ON voltage
(2V/div) (Negative logic)
Figure 9 Output voltage shutdown by remote OFF,
(20ms/div), see Figure 11 for test configuration;
CH1-output voltage (1V/div); CH2-remote OFF voltage
(2V/div) (Negative logic)
OTP test point
Figure 10 OTP test point
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Application Note
Typical Application
C4
L1
C1 C2
C6 C5
AVO100 Load
C3
OP+
Vdc
PE
PE
++
Fuse
Figure 11 Typical application
Recommended input fuse: LITTLEFUSE 216010.P 10A
C1: SMD ceramic-100V-100nF-±10%-X7R-1206
C2: 100µF/100V electrolytic capacitor, high frequency and low ESR
C3: 1000µF/10V electrolytic capacitor, high frequency and low ESR
C4: SMD ceramic-100V-1000nF-X7R-1210
C5, C6: SMD ceramic-47nF/1000V/X7R-1210
L1: 1320uH-±25%-4A-R5K-21mm × 21mm × 12.5mm
Remote ON/OFF
Either positive or negative remote ON/OFF logic is available in AVO100-48S2V5. The logic is
CMOS and TTL compatible.
The voltage between pin Remote ON/OFF and pin Vin- must not exceed the range listed in Feature
Characteristics to ensure proper operation. The external remote ON/OFF circuit in AVO100-48S2V5
is highly recommended as shown in Figure 12.
Isolated remote ON/OFF circuit non-isolated remote ON/OFF circuit
Figure 12 External remote ON/OFF circuit
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Trim Characteristics
Connecting an external resistor between Trim pin and Vo- pin will decrease the output voltage,
while connecting it between Trim and Vo+ will increase the output voltage. The following equations
determine the external resistance to obtain the trimmed output voltage.
Ω-
∆
%
=kR
downadj
)22.10
511
(
_
Ω-
∆%
-
∆%
+
=k
V
out
R
upadj
)22.10
511
V
ref
)
100
(
11
.
5
(
_
∆%
downadj
R
_
: Value of the external adjustment resistor which shall be connected between Trim and S-
for trimming down.
%
∆
: Output voltage change rate against nominal output voltage.
up
adj
R
_
: Value of the external adjustment resistor which shall be connected between Trim and S+
for trimming up.
V
out
: Nominal output voltage.
V
ref
= 1.225V
When trimming up, the output current should be decreased accordingly so as not to exceed the
maximum output power as shown in below figure.
Load
Cout
Vo+
S+
Trim
S-
Vo-
R
trim _up
Load
Cout
Vo+
S+
Trim
S-
Vo-
R
trim _down
Figure 13 Trim up Figure 14 Trim down
Sense Characteristics
If the load is far from the unit, connect S+ and S- to the terminals of the load respectively to
compensate the voltage drop on the transmission line.
If the sense compensate function is not necessary, connect S+ to Vo+ and S- to Vo- directly.
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Input Ripple & Inrush Current And Output Ripple & Noise Test
Configuration
L1
Vdc
C1 C2
Vin+
Vin-
DC/DC C3 C4 Load
Vo+
Vo-
Cin
Probe
50mm
Current Probe
Current probe
Figure 15 Input ripple & inrush current, output ripple & noise test configuration
Vdc: DC power supply
L1: 12µH
Cin: 220µF/100V typical
C1: SMD ceramic-100V-100nF-±10%-X7R-1206
C2: 100µF/100V electrolytic capacitor, high frequency and low ESR
C3: SMD ceramic-10V-1µF-±10%-X7R-1206
C4: 1000µF/10V electrolytic capacitor, high frequency and low ESR
Note: It is recommended to use a coaxial cable with series 50Ω resistor and 0.68µF ceramic
capacitor or a ground ring of probe to test output ripple & noise.
EMC Test Conditions
See Figure11.
Thermal Considerations
The converter is designed to operate in different thermal environments and sufficient cooling must
be provided. Proper cooling of the DC-DC converter can be verified by measuring the temperature
at the test points as shown in Figure 16 and Figure 17. The temperature at these points should not
exceed the maximum values in Table 1 when the module is operating.
For a typical application, forced airflow direction is from Vin- to Vin+. Figure 18 shows the derating
of output current vs. ambient air temperature at different air velocity.
Test point 1
Figure 16 Thermal test point (top)
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Test point 2
Figure 17 Thermal test point (bottom)
Table 1 Temperature limit of the test points
Test point Temperature limit
Test point 1 113°C
Test point 2 118°C
Figure 18 Output power derating, 48Vin, air flowing across the converter from Vin- and Vin+
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Mechanical Diagram
6-Ø1.0±0.1
6-Ø1.6±0.1
9.6[0.378]
L
Load board
Side view
0.3[0.012]MIN
2-Ø1.5±0.1
3.3±0.05
2-Ø2.5±0.1
Unit: mm[inch] Bottom view: pin on upside
Tolerance: X.Xmm±0.5mm[X.X in.±0.02in.]
X.XXmm±0.25mm[X.XX in.±0.01in.]
7
6
5
4
3
2
18
Bottom view
15.24[0.600]
7.62[0.300]
50.80[2.000]
57.90[2.280]
15.24 [0.600]
22.90[0.902]
Figure 19 Mechanical diagram
Pin Length Option
Device code suffix L
-4 4.8mm ± 0.25mm
-6 3.8mm ± 0.25mm
-8 2.8mm ± 0.25mm
None 5.8mm ± 0.25mm
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Pin Designations
Pin No. Name Function
1 Vin+ Positive input voltage
2 Remote ON/OFF Remote control
3 Vin- Negative input voltage
4 Vo- Negative output voltage
5 S- Negative remote sense
6 Trim Output voltage trim
7 S+ Positive remote sense
8 Vo+ Positive output voltage
Soldering
For R6 product, it is intended for standard manual, reflow or wave soldering.
When reflow soldering is used, the temperature on pins is specified to maximum 260°C for
maximum 10s.
When wave soldering is used, the temperature on pins is specified to maximum 260°C for
maximum 7s.
When manual soldering is used, the iron temperature should be maintained at 300°C ~ 380°C and
applied to the converter pins for less than 10s. Longer exposure can cause internal damage to the
converter.
Cleaning of solder joint can be performed with cleaning solvent IPA or similative.
For R5 product, it is intended for standard manual, reflow or wave soldering.
When reflow soldering is used, the temperature on pins is specified to maximum 230°C for
maximum 10s.
When wave soldering is used, the temperature on pins is specified to maximum 255°C for
maximum 7s.
When manual soldering is used, the iron temperature should be maintained at 300°C ~ 380°C and
applied to the converter pins for less than 10s. Longer exposure can cause internal damage to the
converter.
Cleaning of solder joint can be performed with cleaning solvent IPA or similative.
Ordering Information
AVO100 - 48 S 2V5 - 6 L
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
① Model series AVO: series name; 100: output power 100W
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② Input voltage 48: 36V ~ 75V input range, rated input voltage 48V
③ Output number S: single output
④ Rated output voltage 2V5: 2.5V output
⑤ Remote ON/OFF logic Default: negative; P: positive logic
⑥ Baseplate Default: without baseplate; B: with baseplate
⑦ Pin length 6: 3.8mm
⑧ RoHS status L: RoHS, R6; Y: RoHS, R5
Model number Description
AVO100-48S2V5-6L 3.8mm pin length; negative on/off logic; open frame, R6 compliant
AVO100-48S2V5P-6L 3.8mm pin length; positive on/off logic; open frame, R6 compliant
AVO100-48S2V5B-6L 3.8mm pin length; negative on/off logic; with baseplate; R6 compliant, see
AVO100-48S2V5B TRN
AVO100-48S2V5PB-6L 3.8mm pin length; positive on/off logiec; with baseplate; R6 compliant, see
AVO100-48S2V5B TRN
AVO100-48S2V5-6Y 3.8mm pin length; negative on/off logic; open frame, R5 compliant
AVO100-48S2V5P-6Y 3.8mm pin length; positive on/off logic; open frame, R5 compliant
AVO100-48S2V5B-6Y 3.8mm pin length; negative on/off logic; with baseplate; R5 compliant, see
AVO100-48S2V5B TRN
AVO100-48S2V5PB-6Y 3.8mm pin length; positive on/off logiec; with baseplate; R5 compliant, see
AVO100-48S2V5B TRN
Hazardous Substances Announcement (RoHS Of China)
Hazardous substances
Parts Pb Hg Cd Cr
6
＋
＋＋
＋
PBB PBDE
AVO100 -48S2V5 ○ ○ ○ ○ ○ ○
○: Means the content of the hazardous substances in all the average quality materials of the part is within the limits
specified in SJ/T-11363-2006
√: Means the content of the hazardous substances in at least one of the average quality materials of the part is
outside the limits specified in SJ/T11363-2006
Emerson Network Power Co., Ltd. has been committed to the design and manufacturing of environment-friendly
products. It will reduce and eventually eliminate the hazardous substances in the products through unremitting
efforts in research. However, limited by the current technical level, the following parts still contain hazardous
substances due to the lack of reliable substitute or mature solution:
1. Solders (including high-temperature solder in parts) contain plumbum.
2. Glass of electric parts contains plumbum.
3. Copper alloy of pins contains plumbum
