SYNQOR IQ24280HZC18NRS-G

Technical
Specification
IQ24500HZx10
18-36 V
50 V
Input
Output
10 A
2250 Vdc
Current
Isolation
Half-brick
DC-DC Converter
The IQ24500HZx10 InQor® Zeta converter is an isolated,
fixed switching frequency DC-DC converter that uses
synchronous rectification to achieve extremely high
efficiency and power density. The 24 Vin modules feature
2,250 Vdc isolation and low common mode noise. The
Zeta series converters offer industry leading useable
output power for any standard “half-brick” module. RoHS
compliant (see last page).
Operational Features
• Ultra-high efficiency, 94% at full rated load current, 95%
at half rated load current
• Delivers up to 10 A of output current (500 W)
• Wide input voltage range: 18 – 36 V, with 50 V 100 ms input voltage transient capability
• Fixed frequency switching provides predictable EMI performance
• No minimum load requirement means no preload resistors required
• Wide output voltage trim range (-50% to +10%), see trim section
Mechanical Features
• Industry standard half-brick pin-out configuration
• Brick size: 2.39" x 2.49" (63.1 x 60.6 mm)
• Total height only 0.512" (13 mm)
• Total weight: 4.3 oz. (123 grams)
Control Features
• On/Off control referenced to input side
IQ24500HZC10 Module
Protection 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 and consequent
hazardous conditions
• Active back bias limit provides smooth startup with
external load induced pre-bias
• Latching output over-voltage protection protects load
from damaging voltages
• Thermal shutdown protects converter from abnormal
environmental conditions
Safety Features
Contents
• 2250 V, 30 MΩ input-to-output isolation
• UL 60950-1:2003, basic insulation
• CAN/CSA-C22.2 No. 60950-1:2003
• EN60950-1:2001
• CE Marked
• RoHS compliant (see Page 12)
Product # IQ24500HZx10
Phone 1-888-567-9596
Page No.
Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
IQ24500HZC10 ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . 3-4
Standards compliance and Qualification Testing . . . . . . . . . . . . . . . . . . . 4
IQ24500HZC10 Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Application Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 1
Input:
Output:
Current:
Package:
Technical Specification
18-36 V
50 V
10 A (500 W)
Half-brick
Mechanical Diagram
2.486
2.00
1.400
1.000
±.020 [ 63.14
±0.5 ]
[ 50.8 ]
[ 35.56 ]
.700
[ 17.78 ]
.400
[ 10.16 ]
+.002
-.005
+0.05
13
-0.12
OVERALL
HEIGHT
.512
[
[ 25.4 ]
.243 ±.020
[ 6.17 ±0.5 ]
9
8
7
6
]
.163
[ 4.14 ]
5
.243 ±.020
[ 6.17 ±0.5 ]
2.386 ±.020
[ 60.6 ±0.5 ]
TOP VIEW
1.90
[ 48.3 ]
SIDE VIEW
1.90
[ 48.3 ]
.233 ±.020
[ 5.92 ±0.5 ]
1
2
4
3
.543
±.020 [ 13.79 ±0.5 ]
.400
[ 10.16 ]
1.00
[ 25.4 ]
1.400
THRU HOLE
M3 (SEE NOTE 8)
STANDOFFS (4)
+.007
-.010
+0.17
0.69
-0.25
BOTTOMSIDE CLEARANCE
.027
[
]
[ 35.56 ]
PIN DESIGNATIONS
NOTES
1) APPLIED TORQUE PER SCREW SHOULD NOT EXCEED 6in-lb (0.7Nm).
Pin
Name
Function
Positive input voltage
1
Vin(+)
2) BASEPLATE FLATNESS TOLERANCE IS 0.004" (.10mm) TIR FOR SURFACE.
2
ON/OFF
3) PINS 1-4, 6-8 ARE 0.040" (1.02mm) DIA. WITH 0.080" (2.03mm)
DIA. STANDOFF SHOULDERS
TTL input to turn converter on and off,
referenced to Vin(–), with internal pull up.
3
Reserved
Not Connected
4
Vout(–)
Negative output voltage
5
Vout(–)
6
SENSE(–)
Negative output voltage
Negative remote sense1
7
TRIM
8
SENSE(+)
Positive remote sense3
9
Vout(+)
Positive output voltage
4) PINS 5 AND 9 ARE 0.080" (2.03mm) DIA. WITH .125" (3.18) DIA.
STANDOFF SHOULDERS
5) ALL PINS: MATERIAL: COPPER ALLOY
FINISH: MATTE TIN OVER NICKEL PLATE
6) UNDIMENSIONED COMPONENTS ARE SHOWN FOR VISUAL
REFERENCE ONLY
7) WEIGHT: 139g/4.9oz
8) THREADED OR NON-THREADED OPTIONS AVAILABLE
9) ALL DIMENSIONS IN INCHES(mm) TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm X.XXXIN +/-0.010 (X.XXmm +/-0.25mm)
Product # IQ24500HZx10
Phone 1-888-567-9596
Output voltage trim2
Notes:
1)
SENSE(–) should be connected to Vout(–) either
remotely or at the converter.
2)
Leave TRIM pin open for nominal output voltage.
3)
SENSE(+) should be connected to Vout(+) either remotely or at the converter.
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 2
Input:
Output:
Current:
Package:
Technical Specification
18-36 V
50 V
10 A (500 W)
Half-brick
IQ24500HZC10 ELECTRICAL CHARACTERISTICS
TA=25°C, airflow rate=300 LFM, Vin=24Vdc 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 Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
50
V
Operating
40
V
Operating Transient Protection
50
V
Isolation Voltage (input to output)
2250
V
Operating Temperature
-40
100
°C
Storage Temperature
-55
125
°C
Voltage at ON/OFF input pin
-2
18
V
INPUT CHARACTERISTICS
Operating Input Voltage Range
18
24
36
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
16.5
17.0
17.5
V
Turn-Off Voltage Threshold
15.0
15.5
16.0
V
Lockout Voltage Hysteresis
1.0
1.5
2.0
V
Maximum Input Current
38
A
No-Load Input Current
300
350
mA
Disabled Input Current
100
125
mA
Response to Input Transient
1.5
V
Input Reflected Ripple Current
10
25
mA
Input Terminal Ripple Current
500
mA
Recommended Input Fuse
40
A
Input Filter Component Values (L\C)
0.34\23
µH\µF
Recommended External Input Capacitance
470
µF
OUTPUT CHARACTERISTICS
Output Voltage Set Point
48.60
50.00
51.35
V
Output Voltage Regulation
1
+0.25\125
Over Line %\mV
+0.25\125
Over Load1
%\mV
+0.380
+1.000
Over Temperature
V
Total Output Voltage Range
48.5
51.45
V
2
Output Voltage Ripple and Noise 250
300
Peak-to-Peak
mV
60
75
RMS
mV
Operating Output Current Range
0
10
A
11
12
13
Output DC Current-Limit Inception
A
Output DC Current-Limit Shutdown Voltage3
20
V
Back-Drive Current Limit while Enabled
2
3
4
A
Back-Drive Current Limit while Disabled
0
3
7
mA
Maximum Output Capacitance
1
mF
DYNAMIC CHARACTERISTICS
Output Voltage during Load Current Transient
For a Step Change in Output C urrent (0.1 A/µs)
2
V
For a Step Change in Output Current (5 A/µs)
2
V
Settling Time
8
ms
Turn-On Transient
Turn-On Time
24
35
40
ms
Output Voltage Overshoot
2
%
EFFICIENCY
100% Load
94
%
50% Load
95
%
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
125
°C
Board Temperature
125
°C
Transformer Temperature
125
°C
ISOLATION CHARACTERISTICS
Isolation Voltage (dielectric strength)
2250
V
Isolation Resistance
30
MW
Isolation Capacitance4
1000
pF
Note
Note
Note
Note
1:
2:
3:
4:
Continuous
Continuous
100ms transient, square wave
Basic insulation, Pollution Degree 2
50 V transient for 100 ms
100% Load, 18 Vin, trimmed up 10%
0.25 V/µs input transient
RMS thru 3.3 µH inductor
RMS
Fast blow external fuse recommended
Internal values; see Figure E
Typical ESR 0.1-0.2 W
Over sample, line, load, temperature & life
20 MHz bandwidth
Full Load
Full Load
Subject to thermal derating
Output Voltage 10% Low
Negative current drawn from output source
Negative current drawn from output source
10 A Resistive Load
50% to 75% to 50% Iout max, 200 µF load cap
“
To within 1% Vout nom
Full load, ON/OFF to Vout=90% nom.
No load, 1mF load cap
Figures 1 & 2
Figures 1 & 2
Package rated to 150°C
UL rated max operating temp 130°C
Line and load regulation is limited by duty cycle quantization and does not indicate a shift in the internal voltage reference.
For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: [email protected]).
If the output voltage falls below the Output DC Current Limit Shutdown Voltage for more than 50ms, then the unit will enter into hiccup mode, with a 500ms off-time.
Higher values of isolation capacitance can be added external to the module.
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 3
Input:
Output:
Current:
Package:
Technical Specification
18-36 V
50 V
10 A (500 W)
Half-brick
ELECTRICAL CHARACTERISTICS (Continued)
Parameter P
Min.
Typ.
Max.
Units Notes & Conditions
FEATURE CHARACTERISTICS
Switching Frequency Regulation Stage
232
235
237
kHz
Switching Frequency Isolation Stage
116.0
117.5
118.5
kHz
ON/OFF Control (Option N)
Off-State Voltage
4.0
18
V
On-State Voltage
-2
1.0
V
ON/OFF Control
ON/OFF Control Hysteresis
1.5
V
Pull-Up Voltage
4.75
5.00
5.25
V
Pull Up Resistance
10
kW
Output Voltage Trim Range
-50
+10
%
Output Over-Voltage Protection
113
118
123
%
Over-Temperature Shutdown
120
°C
Over-Temperature Shutdown Restart Hysteresis
10
°C
RELIABILITY CHARACTERISTICS
6
Calculated MTBF (Telcordia)
TBD
10 Hrs.
Calculated MTBF (MIL-217)
TBD
106 Hrs.
Field Demonstrated MTBF
106 Hrs.
Over sample, temp & life
Over sample, temp & life
Measured across Pins 9 & 5; see trim section
Over full temp range; % of nominal Vout
Average PCB Temperature
TR-NWT-000332; 80% load,300LFM, 40ºC Ta
MIL-HDBK-217F; 80% load, 300LFM, 40ºC Ta
See website for details
Standards compliance and Qualification Testing
Parameter
Notes & Conditions
STANDARDS COMPLIANCE
UL 60950-1:2003 Basic Insulation
CAN/CSA-C22.2 No. 60950-1:2003
EN60950-1:2001
CE Marked
2006/95/EC Low Voltage Directive
IEC 61000-4-2
ESD test, 8 kV - NP, 15 kV air - NP (Normal Performance)
Note: 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.
Parameter
# Units
Test Conditions
QUALIFICATION TESTING
Life Test
32
95% rated Vin and load, units at derating point, 1000 hours
Vibration
5
10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock
5
100g minimum, 2 drops in x and y axis, 1 drop in z axis
Temperature Cycling
10
-40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles
Power/Thermal Cycling
5
Toperating = min to max, Vin = min to max, full load, 100 cycles
Design Marginality
5
Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load
Humidity
5
85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day
Solderability
Product # IQ24500HZx10
15 pins
Phone 1-888-567-9596
MIL-STD-883, method 2003
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 4
Input:
Output:
Current:
Package:
Technical Specification
100
18-36 V
50 V
10 A (500 W)
Half-brick
60
95
50
Power Dissipation (W)
Efficiency (%)
90
85
80
75
70
18 Vin
24 Vin
36 Vin
65
40
30
20
18 Vin
24 Vin
10
36 Vin
60
0
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
Load Current (A)
4
5
6
7
8
9
10
Load Current (A)
Figure 1: Efficiency at nominal output voltage vs. load current for
minimum, nominal, and maximum input voltage at 25°C.
Figure 2: Power dissipation at nominal output voltage vs. load current
for minimum, nominal, and maximum input voltage at 25°C.
10
12
9
10
8
8
6
Iout (A)
Iout (A)
7
5
6
4
4
3
400 LFM (2.0 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
2
1
300 LFM (1.5 m/s)
2
200 LFM (1.0 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
100 LFM (0.5 m/s)
0
0
25
40
55
70
85
25
Ambient Air Temperature (°C)
40
55
70
85
Ambient Air Temperature (°C)
Figure 3: Encased converter (without heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from input to output (nominal input voltage).
Figure 4: Encased converter (with 1/2” heatsink) max. output power derating vs.
ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows
across the converter from input to output (nominal input voltage).
Figure 5: Turn-on transient at full load (resistive load) (10 ms/div).
Ch 1: Vout (10 V/div)
Ch 2: ON/OFF input (5 V/div)
Figure 6: Turn-on transient at zero load (10 ms/div).
Ch 1: ON/OFF input (5 V/div)
Ch 2: Vout (10 V/div)
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 5
Input:
Output:
Current:
Package:
Technical Specification
Figure 7: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max); dI/dt = 0.1 A/µs; 1 ms/div). Load cap:
1 uF ceramic and 330 µF, 15 mW ESR electrolytic capacitors. Top trace:
Vout (1 V/div). Bottom trace: Iout (5 A/div).
Figure 11
3.3 µH
source
impedance
Figure 8: Output voltage response to step-change in load current
(50%-75%-50% of Iout(max): dI/dt = 5 A/µs; 2 ms/div). Load cap:
330 µF, 15 mW ESR electrolytic capacitor. Top trace: Vout (1.0 V/div).
Bottom trace: Iout 10 A/div).
Figure 10
Figure 12
iS
VSOURCE
18-36 V
50 V
10 A (500 W)
Half-brick
iC
470 µF,
0.2 W ESR
electrolytic
capacitor
DC-DC
Converter
VOUT
1 µF
100 µF,
ceramic 10 mW ESR
capacitor electrolytic
capacitor
Figure 9: Test set-up diagram showing measurement points for Input
Terminal Ripple Current (Figure 10), Input Reflected Ripple Current
(Figure 11) and Output Voltage Ripple (Figure 12).
Figure 10: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 3.3 µH source impedance and
470 µF electrolytic capacitor (200 mA/div; 2 µs/div). See Figure 9.
Figure 11: Input reflected ripple current, is, through a 3.3 µH source
inductor, using a 470 µF input capacitor, at nominal input voltage and
rated load current (10 mA/div; 2 µs/div). See Figure 9.
Figure 12: Output voltage ripple at nominal input voltage and rated load
current (50 mV/div; 2 µs/div). Load capacitance: 1 µF ceramic capacitor and 100 µF electrolytic capacitor. Bandwidth: 20 MHz. See Figure 9.
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 6
Input:
Output:
Current:
Package:
Technical Specification
Figure 13: Output voltage response to step-change in input voltage (18
V to 36 V in 200 µs; 400 µs/div). Load cap: 470 µF, 15 mW ESR electrolytic capacitor. Top trace: Vin (5.0 V/div). Bottom trace: Vout (1.0 V/div),
at zero load current.
18-36 V
50 V
10 A (500 W)
Half-brick
Figure 14: Load current (5 A/div; 10 ms/div) as a function of time when
the converter attempts to turn on into a 1 mW short circuit.
61
57
Output Voltage (V)
53
49
45
41
37
33
18 Vin
29
24 Vin
25
36 Vin
21
-4
-2
0
2
4
6
8
10
12
14
Load Current (A)
Figure 15: Output voltage vs. load current showing typical current limit
curves and OVP shutdown point.
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 7
Input:
Output:
Current:
Package:
Technical Specification
18-36 V
50 V
10 A (500 W)
Half-brick
BASIC OPERATION AND FEATURES
CONTROL FEATURES
The converter series 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 stepdown 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(-).
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 significantly less energy than Schottky diodes, enabling
the converter to achieve high efficiency.
The series of half-brick, quarter-brick and eighth-brick converters
uses the industry standard footprint and pin-out configuration.
ON/OFF
ON/OFF
Vin(_)
Vin(_)
Remote Enable Circuit
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.
If these connections are not made, the converter will deliver an
output voltage that is slightly higher than its specified value.
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. SynQor uses
industry standard trim equations.
5V
ON/OFF
CMOS
Vin(_)
Vin(_)
Open Collector Enable Circuit
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.
Note: The output over-voltage protection circuit senses the voltage
across the sense leads (pins 8 and 6) to determine when it should
trigger, not the voltage across the converter’s output pins (pins 9
and 5).
Negative Logic
(Permanently Enabled)
ON/OFF
The ON/OFF signal is active low (meaning that a low voltage
turns the converter on). Figure A details four possible circuits for
driving the ON/OFF pin.
Direct Logic Drive
To decrease the output voltage, the user should connect a resistor
between Pin 7 (TRIM) and Pin 6 (SENSE(–) input). For a desired
decrease of the nominal output voltage, the value of the resistor
should be:
Rtrim-down =
Phone 1-888-567-9596
kW
where
Figure A: Various circuits for driving the ON/OFF pin.
Product # IQ24500HZx10
(100%
)_2
∆
www.synqor.com
∆% =
Vnominal – Vdesired
Vnominal
Doc.# 005-HZC2450 Rev. D
x 100%
06/16/09
Page 8
Input:
Output:
Current:
Package:
Technical Specification
To increase the output voltage, the user should connect a resistor
between Pin 7 (TRIM) and Pin 8 (SENSE(+) input). For a desired
increase of the nominal output voltage, the value of the resistor
should be
Rtrim-up =
– 2) x V
( Vnominal
1.225
DES
+ VNOM
kW
VDES – VNOM
Figure B graphs the relationship between the trim resistor value,
Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down.
100,000.0
100,000.0
Trim Resistance (kOhms)
10,000.0
10,000.0
18-36 V
50 V
10 A (500 W)
Half-brick
PROTECTION FEATURES
Input Under-Voltage Lockout: The converter is designed
to turn off when the input voltage is too low, helping to avoid
an input system instability problem, which is described in more
detail in the application note titled “Input System Instability” on
the SynQor website. The lockout circuitry is a comparator with
DC hysteresis. When the input voltage is rising, it must exceed the
typical “Turn-On Voltage Threshold” 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. If as a result, the output voltage falls below the
“Output DC Current Limit Shutdown Voltage”* for more than
50 ms, then the unit will enter into hiccup mode, with a 500 ms
off-time. The unit will then automatically attempt to restart.
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 characteristics can be seen in Figure 15.
1,000.0
1,000.0
100.0
100.0
10.0
10.0
1.0
1.0
0.1
0.1
0.0
0.0
00
5
10
15
20
25
% Increase in Vout
30
35
40
45
45
50
50
% Decrease in Vout
Figure
50 Vout
Vout module
module
FigureB:
B:Trim
TrimGraph
Graph for 28
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 filtered to eliminate noise.
Output Over-Voltage Limit: If the voltage directly across
the output pins exceeds the “Output Over-Voltage Protection”
threshold*, the converter will immediately stop switching. This
shutdown is latching; unlike other shutdown types, the converter
will not restart unless the input power is cycled or the ON/OFF
input is toggled.
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 “Over-Temperature
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*.
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.
* See Electrical Characteristics page.
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 9
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.
18-36 V
50 V
10 A (500 W)
Half-brick
Output Filtering and External Output Capacitance:
Figure D 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.
Application Circuits: Figure C below provides a typical circuit
diagram which details the input filtering and voltage trimming.
Input Filtering and External Input Capacitance: Figure D
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.
Electrolytic
Capacitor
External
Input
Filter
Vin
Vout(+)
Vin(+)
Vsense(+)
Trim
ON/OFF
Vsense(_)
Vin(_)
Rtrim-up
or
Rtrim-down
Cload
Iload
Vout(_)
Figure C: Typical application circuit (negative logic unit, permanently enabled).
Lin
Vin(+)
Vout(+)
C1
C2
Vin(_)
Regulation
Stage
Current
Sense
Isolation
Stage
Vout(_)
Figure D: Internal Input and Output Filter Diagram (component values listed on specifications page).
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 10
Input:
Output:
Current:
Package:
Technical Specification
Startup Inhibit Period:TheStartupInhibitPeriodensures
that the converter will remain off for approximately 200
ms when it is shut down for any reason. When an output
shortispresent,thisgeneratesa5Hz“hiccupmode,”which
prevents the converter from overheating. In all, there are
sevenwaysthattheconvertercanbeshutdown,initiatinga
StartupInhibitPeriod:
•InputUnder-VoltageLockout
18-36 V
50 V
10 A (500 W)
Half-brick
WhentheON/OFFpingoeshighaftert2,theStartupInhibit
Period has elapsed, and the output turns on within the
typicalTurn-OnTime.
Thermal Considerations:Themaximumoperatingbaseplate temperature, TB, is 100 ºC. As long as the user’s
thermal system keeps TB < 100 ºC, the converter can
deliveritsfullratedpower.
Apowerderatingcurvecanbecalculatedforanyheatsink
thatisattachedtothebase-plateoftheconverter.Itisonly
•OverTemperatureShutdown
necessarytodeterminethethermalresistance,RTHBA,ofthe
chosenheatsinkbetweenthebase-plateandtheambientair
•CurrentLimit
foragivenairflowrate.Thisinformationisusuallyavailable
•ShortCircuitProtection
fromtheheatsinkvendor.Thefollowingformulacanthebe
•TurnedoffbytheON/OFFinput
used to determine the maximum power the converter can
Figure E shows three turn-on scenarios, where a Startup dissipateforagiventhermalconditionifitsbase-plateisto
benohigherthan100ºC.
InhibitPeriodisinitiatedatt0,t1,andt2:
•OutputOver-VoltageProtection
Before time t0, when the input voltage is below the UVL
threshold, the unit is disabled by the Input Under-Voltage
Lockout feature. When the input voltage rises above the
UVLthreshold,theInputUnder-VoltageLockoutisreleased,
andaStartupInhibitPeriodisinitiated.Attheendofthis
delay, the ON/OFF pin is evaluated, and since it is active,
theunitturnson.
100ºC-TA
max
Pdiss =
RTHBA
This value of power dissipation can then be used in
conjunction with the data shown in Figure 2 to determine
themaximumloadcurrent(andpower)thattheconverter
candeliverinthegiventhermalcondition.
At time t1, the unit is disabled by the ON/OFF pin, and it For convenience, Figures 3 and 4 provide Power derating
cannot be enabled again until the Startup Inhibit Period curves for an encased converter without a heatsink and
haselapsed.
withatypicalheatsink.
Vin
Under-Voltage
LockoutTurnOnThreshold
ON/OFF
(neglogic)
ON
OFF ON
Vout
OFF
ON
9ms (typical
turnontime)
200ms
(typicalstart-up
inhibitperiod)
t0
200ms
200ms
t1
t
t2
Figure E: Startup Inhibit Period (turn-on time not to scale)
Product # IQ24500HZx10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-HZC2450 Rev. D
06/16/09
Page 11
Input:
Output:
Current:
Package:
Technical Specification
18-36 V
50 V
10 A (500 W)
Half-brick
PART NUMBERING SYSTEM
ORDERING INFORMATION
The part numbering system for SynQor’s 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 characters for options.
Add “-G” to the model number for 6/6 RoHS compliance.
IQ 2 4
500 H Z C 10 N R S - G
6/6 RoHS
Options
(see
Ordering Information)
Model Number
Input
Voltage
Output
Voltage
Max Output
Current
IQ24280HZw18NRS-G
18 - 36 V
28 V
18 A
IQ24500HZw10NRS-G
18 - 36 V
50 V
10 A
Output Current
Thermal Design
Performance Level
Package Size
The following options must be included in place of the w 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. The “-G”
suffix indicates 6/6 RoHS compliance.
Application Notes
A variety of application notes and technical white papers can
be downloaded in pdf format from our website.
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 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].
Thermal Design
Enable Logic
Pin Style
Feature Set
C - Encased with
Threaded Baseplate
D - Encased with
Non-Threaded Baseplate
N - Negative
R - 0.180"
S - Standard
Not all combinations make valid part numbers, please contact
SynQor for availability. See the Product Summary web page for
more options.
PATENTS
SynQor holds the following patents, one or more of which
might apply to this product:
5,999,417
6,594,159
6,927,987
7,119,524
6,222,742
6,731,520
7,050,309
7,269,034
6,545,890
6,894,468
7,072,190
7,272,021
6,577,109
6,896,526
7,085,146
7,272,023
Contact SynQor for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
Product # IQ24500HZx10
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 two (2) 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-HZC2450 Rev. D
06/16/09
Page 12