12.8A/360W

Technical
S pecification
PQ60280HEA13
48V in
28Vout 12.8Amp 2250Vdc
Input
Output
Current
Isolation
Half-brick
DC/DC Conver ter
The PQ 60280 HEA13 Pow erQ or ® Ex a conv ert er is a n is o la ted , fixed s witch ing f req u enc y D C/DC c on ver ter tha t u ses
synchronous rectification and a patented topology to
ac hi ev e e x t reme ly hi gh e f f i ci en cy an d po w er d en s i ty . T hi s
mod ul e is ide al ly s uit ed t o s up p or t wir el ess b as e s ta t ion
amp l ifier s an d for a p pl ica tion s to d r iv e co ol ing fan s u sed in
net wo rk in g sy st em s, s er ve rs a n d d a ta st o ra ge un it s . T he Exa
ser ies con v ert er s o ffer in du s tr y l ea din g us ea bl e ou tp u t p ower
for an y s tan d ar d “ h al f-b r ick” mo du l e. Th e 2 8Vo mod ul es ar e
a v a i l a b l e i n o p e n f r a m e a n d b a s e p l a t e d v e r s i o n s . R oH S
compliant (see page 13 ).
Operational Features
• Ultra-high efficiency, 94.5% at full rated load current,
94% at half rated load current
• Delivers up to 360 Watts of output power with minimal
derating
• Input voltage range: 35V – 75V, with 100V for 100ms
input transient capability
• Fixed frequency switching provides predictable EMI performance
• On-board input and output filtering
Mechanical Features
• Industry standard half-brick pin-out configuration
• Industry standard size: 2.3” x 2.4” (58.4 x 61.0mm)
• Total height only 0.43” (10.8mm), baseplated unit only
0.50” (12.7mm)
• Total weight: 2.6 oz. (75 grams), baseplated unit
4.3oz. (123 grams)
Contr ol Features
• On/Off control referenced to input side (positive and
negative logic options are available)
• Remote sense for the output voltage compensates for
output distribution drops
• Output voltage trim permits custom voltages and voltage
margining
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
PQ60280HEA13 Module
Pr otection Features
• Input under-voltage lockout disables converter at low
input voltage conditions
• Output current limit and short circuit protection protects
converter and load from damage
• Active back bias limit prevents damage to converter
from external load induced pre-bias
• Output over-voltage protection
• Thermal shutdown
Safety Features
• 2250V, 30 MW input-to-output isolation
• UL/cUL 60950-1 recognized (US & Canada), basic
insulation rating
• TUV certified to EN60950-1
• Meets 72/23/EEC and 93/68/EEC directives
• Meets UL94V-0 flammability requirements
Doc.# 005-2HE628P Rev. C
7/3/07
Page 1
Input:
Output:
Current:
Package:
Technical Specification
MECHANICAL
DIAGRAM
(open frame)
35-75 V
28 V
12.8 A
Half-brick
2.40
(61.00)
1.400
(35.56)
1.000
(25.40)
0.700
(17.78)
0.400
(10.16)
9
Overall Height
0.398+/-0.016
(10.11+/-0.4)
8
7
6
5
Side View
1.90
(48.30)
2.30
(58.40)
Top View
0.19
Bottom side
Clearance
See Note 10
0.030+/-0.028
(0.76+/-0.71)
(4.80)
Load Board
0.145
(3.68)
See Note 3
1
2
4
0.50
0.400
(12.70)
(10.16)
1.400
(35.56)
PIN DESIGNATIONS
NOTES
1) Pins 1-4, 6-8 are 0.040” (1.02mm) diameter. with
0.080” (2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with
0.125” (3.18mm) diameter standoff shoulders.
3) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
4) All Pins: Material - Copper Alloy
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
Finish (RoHS 6/6) - Matte Tin over Nickel plate
5) Undimensioned components are shown for visual reference only.
6) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
7) Weight: 2.6 oz. (75g) typical
8) Workmanship: Meets or exceeds IPC-A-610C Class II
9) UL/TUV standards require a clearance greater than 0.04”
(1.02mm) between input and output for Basic insulation. This
issue should be considered if any copper traces are on the
top side of the user’s board. Note that the ferrite cores are
considered part of the input/primary circuit.
Pin No. Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
4
Vin(-)
Negative input voltage
5
Vout(-)
Negative output voltage
6
SENSE(-)
Return remote sense
7
TRIM
Output voltage trim
8
SENSE(+)
Positive remote sense
9
Vout(+)
Positive output voltage
Notes:
1. SENSE(-) may be connected to Vout(-) either remotely or at the converter.
2. Leave TRIM pin open for nominal output voltage.
3. SENSE(+) may be connected to Vout(+) either remotely or at the converter.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 2
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
2.40
MECHANICAL
DIAGRAM
(base-plated)
(61.0)
2.00
(50.8)
1.400
(35.56)
0.20
(5.1)
1.000
(25.40)
0.20
0.700
(5.1)
(17.78)
0.400
(10.16)
Side View
0.492 +.002/-.005
(12.5 +.05/-.12)
Top View
1.90
(48.3)
1.90
(48.3)
2.30
(58.4)
0.19
(4.8)
.042 +.021/-.024
(1.07 +.53/-.60)
Bottom side
Clearance
0.145 typ.
(3.68)
See Note 3
M3 Non-Threaded
or Threaded
Standoff
2 Places
(see Note 4 for
threaded version)
0.400
(10.16)
0.50
(12.7)
1.400
(35.56)
NOTES
1) Pins 1-4, 6-8, A, B are 0.040” (1.02mm) diameter with
0.080” (2.03mm) diameter standoff shoulders.
2) Pins 5 and 9 are 0.080” (2.03 mm) diameter with 0.125”
(3.18mm) diameter standoff shoulders.
3) Other pin extension lengths available. Recommended pin
length is 0.03” (0.76mm) greater than the PCB thickness.
4) Applied torque per screw should not exceed 3 in-lb (.33Nm)
5) Baseplate flatness tolerance is 0.004” (0.10mm) TIR for surface.
6) All Pins: Material - Copper Alloy
Finish (RoHS 5/6) - Tin/Lead over Nickel plate
Finish (RoHS 6/6) - Matte Tin over Nickel plate
7) Undimensioned components are shown for visual reference only.
8) All dimensions in inches (mm)
Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm)
x.xxx +/-0.010 in. (x.xx +/-0.25mm)
9) Weight: 4.3 oz. (123g) typical
10) Workmanship: Meets or exceeds IPC-A-610C Class II
Pin Farside
Typical
PIN DESIGNATIONS
Pin No. Name
Function
1
Vin(+)
Positive input voltage
2
ON/OFF
TTL input to turn converter
on and off, referenced to
Vin(-), with internal pull up.
4
Vin(-)
Negative input voltage
5
Vout(-)
Negative output voltage
6
SENSE(-)
Return remote sense
7
TRIM
Output voltage trim
8
SENSE(+)
Positive remote sense
9
Vout(+)
Positive output voltage
Notes:
1. SENSE(-) may be connected to Vout(-) either remotely or at the converter.
2. Leave TRIM pin open for nominal output voltage.
3. SENSE(+) may be connected to Vout(+) either remotely or at the converter.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 3
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
PQ60280HEA13 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=48Vdc unless otherwise noted; full operating temperature range is -40°C to +100°C ambient temperature with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units
100
80
100
2250
100
125
18
V
V
V
V
°C
°C
V
Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
Operating
Operating Transient Protection
Isolation Voltage (input to output)
Operating Temperature
Storage Temperature
Voltage at ON/OFF input pin
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Voltage Hysteresis
Maximum Input Current
No-Load Input Current
Disabled Input Current
Inrush Current Transient Rating
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
Input Filter Component Values (L\C)
Recommended External Input Capacitance
Recommended External Input Capacitor ESR1
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise1
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
Back-Drive Current-Limit While Enabled
Back-Drive Current-Limit While Disabled
Maximum Output Capacitance
-40
-55
-2
35
48
75
V
32.3
29.6
33.6
30.6
3.0
34.6
31.8
V
V
V
A
mA
mA
A 2s
mA
mA
A
µH\µF
µF
180
39
120
0.04
27.75
27.50
0.0
14.7
0.5
0.14
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Voltage during Load Current Transient
For a Step Change in Output Current (0.1A/µs)
For a Step Change in Output Current (5A/µs)
Settling Time
Turn-On Transient
Turn-On Time
Start-Up Inhibit Time
Output Voltage Overshoot
EFFICIENCY
100% Load
50% Load
10
2
11.0
250
60
0.05
40
20
1.0 \ 5.0
100
0.20
1.00
28.00
28.25
+0.05 \ 28 +0.10 \ 28
+0.1 \ 28 +0.2 \ 56
+45
+90
28.50
RMS thru 4.7µH inductor; Figures 13 & 15
RMS; Figures 13 & 14
Fast blow external fuse recommended
Internal values; Figure E
Typical ESR 0.2W; see Figure 13
100kHz, -40ºC to 100ºC
V
%\mV
%\mV
mV
V
mV
mV
A
A
A
A
µF
30
dB
120 Hz; Figure 20
500
500
200
mV
mV
µs
50-75-50% Iout max; 330µF cap; Figure 11
50-75-50% Iout max; 330µF cap; Figure 12
To within 1% Vout nom
ms
ms
%
Full load, Vout=90% nom.; Figures 9 & 10
-40°C to +125°C; Figure A
4,000 µF load capacitance, Iout = 12.8A resistive load
%
%
Figures 1 - 4 (Figure 23 for baseplated)
Figures 1 - 4 (Figure 23 for baseplated)
°C
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
Applies to baseplated units only
150
30
15.8
1.0
0.20
19
4
0
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
Transformer Temperature
Maximum Baseplate Temperature2
Isolation Voltage (dielectric strength)
Isolation Resistance
Isolation Capacitance3
100% Load, 35 Vin
Over sample, line, load, temperature & life
20MHz bandwidth; Figures 13 & 16
Full Load; Figures 13 & 16
Full Load; Figures 13 & 16
Subject to thermal derating; Figures 5 - 8
Output Voltage 10% Low; Figure 25
Negative current drawn from output
Negative current drawn from output
28Vout at 12.8A Resistive Load
200
50
12.8
17.0
2.0
0.30
4,000
26
6
94.5
94.0
ISOLATION CHARACTERISTICS
W
Continuous
Continuous
100µs transient
Basic insulation level, Pollution degree 2
125
125
125
100
2250
30
220
V
MW
pF
Note 1: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected])
Note 2: There is no derating with a baseplate temperature of 100ºC or lower.
Note 3: Higher values of isolation capacitance can be added external to the module.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 4
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control (Option P)
Off-State Voltage
On-State Voltage
ON/OFF Control (Option N)
Off-State Voltage
On-State Voltage
ON/OFF Control (Either Option)
Pull-Up Voltage
Pull-Up Resistance
Feature Set S
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Feature Set H
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over-Temperature Shutdown
Over-Temperature Shutdown Restart Hysteresis
Load Current Scale Factor
Min.
Typ.
Max.
Units
275
290
305
kHz
-2
2.7
0.8
18
V
V
2.7
-2
18
0.8
V
V
5.5
V
kW
+10
+10
123.0
%
%
%
Measured across Pins 9 & 5; Figure C
Measured across Pins 9 & 5
Over full temp range; % of nominal Vout
+15
+15
37.5
%
%
V
°C
°C
Measured across Pins 9 & 5; Figure C
Measured across Pins 9 & 5
Over full temp range
Average PCB Temperature
5
10
-50
111.0
117.0
-50
34.4
RELIABILITY CHARACTERISTICS
Calculated MTBF (Telcordia)
Calculated MTBF (MIL-217)
Field Demonstrated MTBF
35.9
120
10
400
Notes & Conditions
Regulation and Isolation stages
Figure A
See App Note: Output Load Current Calc.
10 Hrs. TR-NWT-000332; 80% load,300LFM, 40oC Ta
106 Hrs. MIL-HDBK-217F; 80% load, 300LFM, 40oC Ta
106 Hrs. See our website for details
6
1.9
1.4
STANDARDS COMPLIANCE
Parameter P
Notes
STANDARDS COMPLIANCE
UL/cUL 60950-1
EN60950-1
72/23/EEC
93/68/EEC
Needle Flame Test (IEC 695-2-2)
IEC 61000-4-2
GR-1089-CORE
Telcordia (Bellcore) GR-513
File # E194341, Basic insulation & pollution degree 2
Certified by TUV
Test on entire assembly; board & plastic components UL94V-0 compliant
ESD test, 8kV - NP, 15kV air - NP (Normal Performance)
Section 7 - electrical safety, Section 9 - bonding/grounding
• An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety
certificates on new releases or download from the SynQor website.
QUALIFICATION TESTING
Parameter P
QUALIFICATION TESTING
Life Test
Vibration
Mechanical Shock
Temperature Cycling
Power/Thermal Cycling
Design Marginality
Humidity
Solderability
# Units
32
5
5
10
5
5
5
15 pins
Test Conditions
95% rated Vin and load, units at derating point, 1000 hours
10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3 axis
100g minimum, 2 drops in x and y axis, 1 drop in z axis
-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles
Toperating = min to max, Vin = min to max, full load, 100 cycles
Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off
MIL-STD-883, method 2003
• Extensive characterization testing of all SynQor products and manufacturing processes is performed to ensure that we supply
robust, reliable product. Contact the factory for official product family qualification documents.
OPTIONS
PATENTS
SynQor provides various options for Logic Sense, Pin Length and
Feature Set for this family of DC/DC converters. Please consult the
last page for information on available options.
SynQor is protected under various patents. Please refer to the
last page for further information.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 5
Input:
Output:
Current:
Package:
Technical Specification
100
35-75 V
28 V
12.8 A
Half-brick
96
95
95
Efficiency (%)
Efficiency (%)
90
85
80
75
93
35 Vin
48 Vin
70
94
25 C
40 C
75 Vin
55 C
92
65
0
1
3
4
5
7
8
9
10
12
0
13
100
Load Current (A)
200
300
400
Air Flow (LFM)
Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25°C.
Figure 2: Efficiency at nominal output voltage and 60% rated power vs.
airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C
(nominal input voltage).
30
14
Power Dissipation (W)
Power Dissipation (W)
25
20
15
10
35 Vin
13
12
11
25 C
40 C
48 Vin
5
75 Vin
55 C
0
10
0
1
3
4
5
7
8
9
10
12
13
0
100
Load Current (A)
200
300
400
Air Flow (LFM)
Figure 3: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
Figure 4: Power dissipation at nominal output voltage and 60% rated
power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and
55°C (nominal input voltage).
14
Semiconductor junction temperature is
within 1°C of surface temperature
12
Iout (A)
10
8
6
400 LFM (2.0 m/s)
4
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
2
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 5: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from pin
4 to pin 1 (nominal input voltage). See Figure 23 for baseplate derating curve.
Product # PQ60280HEA13
Phone 1-888-567-9596
Figure 6: Thermal plot of converter at 9.3 amp load current (260.4W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing from pin 4
to pin 1 (nominal input voltage).
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 6
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
Semiconductor junction temperature is
within 1°C of surface temperature
14
12
Iout (A)
10
8
6
400 LFM (2.0 m/s)
4
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
2
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
Ambient Air Temperature (ºC)
Figure 7: Maximum output power derating curves vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM with air flowing from input
to output (nominal input voltage). See Figure 23 for baseplate derating curve.
Figure 9: Turn-on transient at full load (resistive load) (10 ms/div).
Input voltage pre-applied. Top Trace: Vout (5V/div). Bottom Trace:
ON/OFF input (5V/div)
Figure 11: Output voltage response to step-change in load current (50%-75%50% of Iout(max); dI/dt = 0.1A/µ s). Load cap: 330µ F, electrolytic output capacitance. Top trace: Vout (500mV/div). Bottom trace: Iout (5A/div).
Product # PQ60280HEA13
Phone 1-888-567-9596
Figure 8: Thermal plot of converter at 9.6 amp load current (268.8W)
with 55°C air flowing at the rate of 200 LFM. Air is flowing across the
converter from input to output (nominal input voltage).
Figure 10: Turn-on transient at zero load (10 ms/div). Top Trace: Vout
(5V/div). Bottom Trace: ON/OFF input (5V/div)
Figure 12: Output voltage response to step-change in load current (50%-75%50% of Iout(max): dI/dt = 5A/µ s). Load cap: 330µ F, electrolytic output capacitance. Top trace: Vout (500mV/div). Bottom trace: Iout (5A/div).
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 7
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
See Fig. 15
4.7 µH
source
impedance
See Fig. 14
See Fig. 16
iS
VSOURCE
iC
100 µF,
electrolytic
capacitor
DC/DC
Converter
VOUT
15 µF,
2*4.7 µF
ceramic tantalum and
capacitor
1µF ceramic
capacitor
Figure 13: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 14), Input Reflected Ripple Current
(Figure 15) and Output Voltage Ripple (Figure 16).
Figure 14: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 4.7µ H source impedance and
100µ F electrolytic capacitor (100 mA/div). (See Figure 13)
Figure 15: Input reflected ripple current, is, through a 10 µ H source
inductor at nominal input voltage and rated load current (10 mA/div).
(See Figure 13)
Figure 16: Output voltage ripple at nominal input voltage and rated
load current (50 mV/div). Load capacitance: two 4.7µ F ceramic capacitors and 15µ F tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13)
Figure 17: Output voltage response to step-change in input voltage
(1000V/ms). Load cap: 330µ F, electrolytic output capacitance. Ch 1: Vout
(2V/div), Ch 2: Vin (20V/div).
Figure 18: Load current (5A/div) as a function of time when the converter attempts to turn on into a 10 mW short circuit.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 8
Input:
Output:
Current:
Package:
Technical Specification
10
0
1
Forward Transmission (dB)
Output Impedance (ohms)
10
35-75 V
28 V
12.8 A
Half-brick
0.1
0.01
35 Vin
48 Vin
0.001
-10
-20
-30
35 Vin
48 Vin
-40
75 Vin
75 Vin
-50
0.0001
100
1,000
10,000
100
100,000
1,000
10,000
Hz
100,000
Hz
Figure 19: Magnitude of incremental output impedance (Zout =
vout/iout) for minimum, nominal, and maximum input voltage at full
rated power.
Figure 20: Magnitude of incremental forward transmission (FT =
vout/vin) for minimum, nominal, and maximum input voltage at full
rated power.
15
100
5
Input Impedance (ohms)
Reverse Transmission (dB)
10
0
-5
-10
-15
-20
35 Vin
48 Vin
-25
10
1
35 Vin
48 Vin
75 Vin
75 Vin
-30
0.1
10
100
1,000
10,000
100,000
10
100
1,000
Hz
10,000
100,000
Hz
Figure 21: Magnitude of incremental reverse transmission (RT =
iin/iout) for minimum, nominal, and maximum input voltage at full rated
power.
Figure 22: Magnitude of incremental input impedance (Zin = vin/iin)
for minimum, nominal, and maximum input voltage at full rated power.
14
5
12
4
Rth (C/W)
Iout (A)
10
8
6
3
2
400 LFM (2.0 m/s)
4
13A
300 LFM (1.5 m/s)
9.5A
1
200 LFM (1.0 m/s)
2
5A
100 LFM (0.5 m/s)
2A
0
0
0
25
40
55
70
85
0
50
100
Ambient Air Temperature (ºC)
Figure 23: Baseplated unit maximum output power derating curves vs. ambient
air temperature for airflow rates of 100 LFM through 400 LFM with air flowing
from input to output (nominal input voltage). No derating if baseplate is <100ºC.
Product # PQ60280HEA13
Phone 1-888-567-9596
200
300
400
Airflow (LFM)
Figure 24: Thermal resistance.
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 9
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
35
Output Voltage (V)
30
25
20
15
10
35 V
48 V
75 V
5
0
0
2
4
6
8
10
12
14
16
18
Load Current (A)
Figure 25: Output voltage vs. load current showing typical current limit
curves and converter shutdown points.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 10
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The PowerQor series converter uses a two-stage power conversion topology. The first stage keeps the output voltage constant
over variations in line, load, and temperature. The second stage
uses a transformer to provide the functions of input/output isolation and voltage step-down to achieve the low output voltage
required.
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). There are
two versions of the converter that differ by the sense of the logic
used for the ON/OFF input.
Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the
transformer’s output is accomplished with synchronous rectifiers.
These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the
primary reason that the PowerQor converter has such high efficiency, even at very low output voltages and very high output currents.
Dissipation throughout the converter is so low that it does not
require a heatsink for operation. Since a heatsink is not required,
the PowerQor converter does not need a metal baseplate or potting material to help conduct the dissipated energy to the
heatsink. The PowerQor converter can thus be built more simply
and reliably using high yield surface mount techniques on a PCB
substrate.
The PowerQor series of half-brick and quarter-brick converters
uses the industry standard footprint and pin-out configuration.
ON/OFF
Vin(_)
Vin(_)
Vin(_)
Remote Enable Circuit
ON/OFF
ON/OFF
Negative Logic
(Permanently Enabled)
ON/OFF
In the positive logic version, the ON/OFF input is active high
(meaning that a high turns the converter on). In the negative logic
version, the ON/OFF signal is active low (meaning that a low
turns the converter on). Figure A details five possible circuits for
driving the ON/OFF pin.
REMOTE SENSE(+) (Pins 8 and 6): The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load.
Pin 8 should be connected to Vout(+) and Pin 6 should be connected to Vout(-) at the point on the board where regulation is
desired. A remote connection at the load can adjust for a voltage
drop only as large as that specified in this datasheet, that is
Pins 8 and 6 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value.
Note: the output over-voltage protection circuit senses the voltage
across the output (pins 9 and 5) to determine when it should trigger, not the voltage across the converter’s sense leads (pins 8
and 6). Therefore, the resistive drop on the board should be
small enough so that output OVP does not trigger, even during
load transients.
OUTPUT VOLTAGE TRIM (Pin 7): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications.
Positive Logic
To decrease the output voltage, the user should connect a resistor
(Permanently Enabled) between Pin 7 and Pin 6 (SENSE(-) input). For a desired decrease
of the nominal output voltage, the value of the resistor should be
5V
TTL/
CMOS
ON/OFF
Rtrim-down =
-2
(100%
D )
(kW)
where
Vin(_)
Vin(_)
Open Collector Enable Circuit
Direct Logic Drive
D% =
Vnominal – Vdesired
Vnominal
x 100%
Figure A: Various circuits for driving the ON/OFF pin.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 11
Input:
Output:
Current:
Package:
Technical Specification
To increase the output voltage, the user should connect a resistor
between Pin 7 and Pin 8 (SENSE(+) input). For a desired increase
of the nominal output voltage, the value of the resistor should be
Rtrim-up =
nominal – 2
(V1.225
)xV
DES
+ VNOM
(kW)
VDES - VNOM
Figure C graphs the relationship between the trim resistor value
and Rtrim-up and Rtrim-down, showing the total range the output
voltage can be trimmed up or down.
value* before the converter will turn on. Once the converter is
on, the input voltage must fall below the typical Turn-Off Voltage
Threshold value before the converter will turn off.
Output Current Limit: If the output current exceeds the
"Output DC Current Limit Inception" point*, then a fast linear current limit controller will reduce the output voltage to maintain a
constant output current. There is no minimum operating output
voltage. The converter will run with low on-board power dissipation down to zero output voltage. A redundant circuit will shutdown the converter if the primary current limit fails.
Back-Drive Current Limit: If there is negative output current
of a magnitude larger than the "Back-Drive Current Limit while
Enabled" specification*, then a fast back-drive limit controller will
increase the output voltage to maintain a constant output current.
If this results in the output voltage exceeding the "Output OverVoltage Protection" threshold*, then the unit will shut down. The
full I-V output characteristic can be seen in Figure 19.
100,000.0
10,000.0
Trim Resistance (kOhms)
35-75 V
28 V
12.8 A
Half-brick
1,000.0
100.0
10.0
1.0
0.1
0.0
0
5
10
15
20
25
% Increase in Vout
30
35
40
45
50
% Decrease in Vout
Figure C: Trim Graph for 28Vout module
Note: the TRIM feature does not affect the voltage at which the
output over-voltage protection circuit is triggered. Trimming the
output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients.
It is not necessary for the user to add capacitance at the Trim pin.
The node is internally bypassed to eliminate noise.
Total DC Variation of Vout: For the converter to meet its full
specifications, the maximum variation of the DC value of Vout,
due to both trimming and remote load voltage drops, should not
be greater than that specified for the output voltage trim range.
PROTECTION FEATURES
Output Over-Voltage Limit: If the voltage across the output
pins exceeds the “Output Over-Voltage Protection” threshold*,
the converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a
release of a short-circuit condition, or 3) a release of a current
limit condition. Load capacitance determines exactly how high
the output voltage will rise in response to these conditions.
Over-Temperature Shutdown: A temperature sensor on the
converter senses the average temperature of the module. The
thermal shutdown circuit is designed to turn the converter off
when the temperature at the sensed location reaches the OverTemperature Shutdown value. It will allow the converter to turn on
again when the temperature of the sensed location falls by the
amount of the Over-Temperature Shutdown Restart Hysteresis
value.
Start-up Inhibit Period: If any protection feature causes the
converter to shut down, the converter will attempt to restart after
2ms (typical), the "Startup Inhibit Period".* On initial application of input voltage, with the on/off pin set to enable the converter, the "Turn-On Time"* will increase by only 2ms.
Input Under-Voltage Lockout: The converter is designed to
turn off when the input voltage is too low, helping avoid an input
system instability problem, described in more detail in the application note titled “Input System Instability”. The lockout circuitry
is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical “Turn-On Voltage Threshold”
* See specifications page for details.
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 12
Input:
Output:
Current:
Package:
Technical Specification
APPLICATION CONSIDERATIONS
Input System Instability: This condition can occur because
any DC/DC converter appears incrementally as a negative
resistance load. A detailed application note titled “Input
System Instability” is available on the SynQor website which
provides an understanding of why this instability arises, and
shows the preferred solution for correcting it.
Application Circuits: Figure D below provides a typical circuit diagram which details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure E
below shows the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise
could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in
the “Input Characteristics” section on the Electrical Specifications
page. More detailed information is available in the application
note titled “EMI Characteristics” on the SynQor website.
35-75 V
28 V
12.8 A
Half-brick
Output Filtering and External Output Capacitance:
Figure E below shows the internal output filter components. This
filter dramatically reduces output voltage ripple. However, some
minimum external output capacitance is required, as specified in
the Output Characteristics section on the Electrical Specifications
page. No damage will occur without this capacitor connected,
but peak output voltage ripple will be much higher.
RoHS Compliance: The EU led RoHS (Restriction of Hazardous
Substances) Directive bans the use of Lead, Cadmium,
Hexavalent Chromium, Mercury, Polybrominated Biphenyls
(PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical
and Electronic Equipment. This SynQor product is available as
5/6 RoHS compliant (product with lead) or 6/6 RoHS compliant.
For more information please refer to SynQor’s RoHS addendum
available at our RoHS Compliance / Lead Free Initiative web
page or e-mail us at [email protected]
2 x 4.7µF
local ceramic
Vout(+)
Vin(+)
Electrolytic
Capacitor
External
Input
Filter
Vin
100µF
ESR @ 0.2W
Vsense(+)
ON/OFF
Trim
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure D: Typical application circuit (negative logic unit, permanently enabled).
Lin
Lout /2
Vin(+)
Vout(+)
C1
C2
Regulation
Stage
Isolation
Stage
Cout
Current
Sense
Vin(_)
Lout /2
Vout(_)
Figure E: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # PQ60280HEA13
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 13
Input:
Output:
Current:
Package:
Technical Specification
35-75 V
28 V
12.8 A
Half-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s PowerQor DC/DC
converters follows the format shown in the example below.
The tables below show the valid model numbers and ordering
options for converters in this product family. When ordering
SynQor converters, please ensure that you use the complete
15 character part number consisting of the 12 character base
part number and the additional 3 characters for options. To
order 6/6 RoHS compliant product please add a “-G” suffix.
PQ 60 280 H E A 13 N N S
Options
(see
Ordering Information)
Output Current
Thermal Design
Performance Level
Package Size
Model Number
Input Voltage
PQ60280HEw 13xyz
35 - 75 V
Output Max Output
Voltage
Current
28.0 V
12.8 A
The following option choices must be included in place of the
x y z spaces in the model numbers listed above.
Output Voltage
Input Voltage
Product Family
Options Description: w x y z
The first 12 characters comprise the base part number and the
last 3 characters indicate available options. Although there
are no default values for enable logic and pin length, the most
common options are negative logic and 0.145” pins. These
part numbers are more likely to be readily available in stock
for evaluation and prototype quantities. A “-G” suffix indicates 6/6 RoHS compliance.
Thermal
Design
Enable
Logic
A - Open Frame
B - Threaded Baseplate
F - Non-Threaded Baseplate
P - Positive
N - Negative
Pin
Length
K - 0.110"
N - 0.145"
R - 0.180"
Y - 0.250"
Feature
Set
S - Standard
H - Higher Trim
Range & OVP
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
PATENTS (additional patent applications may be filed)
SynQor holds the following patents, one or more of which
might apply to this product:
5,999,417
6,594,159
6,927,987
6,222,742
6,731,520
7,050,309
6,545,890
6,894,468
7,072,190
6,577,109
6,896,526
7,085,146
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # PQ60280HEA13
978-849-0600
888-567-9596
978-849-0602
[email protected]
www.synqor.com
155 Swanson Road
Boxborough, MA 01719
USA
Phone 1-888-567-9596
Warranty
SynQor offers a three (3) year limited warranty. Complete warranty
information is listed on our website or is available upon request from
SynQor.
Information furnished by SynQor is believed to be accurate and reliable.
However, no responsibility is assumed by SynQor for its use, nor for any
infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any
patent or patent rights of SynQor.
www.synqor.com
Doc.# 005-2HE628P Rev. C
7/3/07
Page 14
Similar pages