HTM27092S [INFINEON]
DC-DC Regulated Power Supply Module;
| 型号： | HTM27092S |
| 厂家： | 
Infineon |
| 描述： | DC-DC Regulated Power Supply Module |
| 文件： | 总14页 (文件大小：246K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PD-97816
HTM27092S
165°C, 270V Input, 92W, 92V Single Output
HIGH RELIABILITY
DC-DC CONVERTER
Description
The HTM27092S is a single output 92W DC-DC converter
designed to operate in extremely high temperature environments
such as those encountered in oil exploration. Features include
small size, low weight and high tolerance to environmental
stresses such as wide wide temperature extremes, severe
shock and vibration. All internal components and assembly
processes have been selected and developed to ensure reliable
performance in the intended operating environments.
HTM
Features
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190 to 400V DC Input Range
Up to 92W Output Power
92V, 1.0A Rated Output Voltage and Current
Internal EMI Filter
Magnetically Coupled Feedback
80% Minimum Efficiency
-20°Cto+165°C continuouswithtransientupto+175°C
100MΩ @ 500V DC Isolation
Under-Voltage Lockout
Short Circuit and Overload Protection
Output Over Voltage Limiter
Adjustable Output Voltage within 10% of nominal
External Inhibit
The converter incorporates a fixed frequency forward topology
with magnetic feedback and internal EMI filter. It also includes
an external inhibit port and have an adjustable output voltage.
It is enclosed in a hermetic 4.5" x 2.15" x 0.40" (4.0"x1.5"x0.40"H
excluding mounting tabs and I/O pins) AlSi package and weighs
less than 80 grams. The package utilizes rugged ceramic
feed-thru, copper-cored pins and is sealed using laser welding.
.
Full environmental screening includes temperature cycling,
constant acceleration, fine and gross leak, and burn-in. Please
refer to Device Screening table. Variations in electrical
specifications and screening to meet custom requirements
can be accommodated
Low Weight < 80 grams
Circuit Description
Applications
n Down Hole Exploration Tools
The HTM27092S converter utilizes an enhanced forward
topology with two power switches and resonant reset. The
nominal switching frequency is 520 kHz. Electrical isolation
and tight output regulation are achieved through the use of a
magnetically coupled feedback. Voltage feed-forward with
duty factor limiting provides high line rejection and protection
against output over voltage due to certain component failures
in the internal control loop. This mechanism limits the maximum
output voltage to approximately 20% over the nominal
regardless of the line voltage with an output load that is
≥ 25% of the full rated output power.
The current limit point exhibits a slightly negative
temperature coefficient to reduce the possibility of
thermal runaway.
An external Inhibit port An external inhibit port (Pin 4) is
provided to control converter operation.The converter’s
operation is inhibited when this pin is pulled low. It is
designed to be driven by an open collector logic device.
The pin may be left open for normal operation and has
a nominal open circuit voltage of 4V with respect to the
input return (Pin 2).
Output current is limited under load fault conditions to
approximately 125% of the rating. An overload condition
causes the converter output to behave like a constant current
source with the output voltage dropping below nominal. The
converter will resume normal operation when the load current
is reduced below the current limit point. This protects the
converter from both overload and short circuit conditions.
The output voltage of all models can be adjusted using
a single external resistor within ±10% of nominal output
voltage.
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1
10/15/13
HTM27092S
PRELIMINARY
Absolute Maximum Ratings
Recommended Operating Conditions
Input voltage range
-0.5Vdc to +400Vdc
Internally limited
+300°C for 10 seconds Operating temperature
Input voltage range
190Vdc to 400Vdc
0 to Max. Rated
-20°C to +165°C
-20°C to +165°C
Output power
Output power
Lead temperature
Operating case temperature
Storage temperature
-20°C to +175°C
-55°C to +175°C
Storage temperature
Electrical Performance Characteristics
Conditions
Limits
-20°C ≤ T ≤ +165°C
C
V
IN
= 270V DC ± 5%, C = 0
Group A
L
Subgroup
unless otherwise specified
Parameter
Input Voltage
Min. Nom. Max.
Unit
V
190
90
0
270
400
1,2,3
1,2,3
1,2,3
94
V
W
A
Output Voltage ( V
)
I
= 100% Rated Load, Note 1
= 190, 270, 400 Volts, Note 2
= 190, 270, 400 Volts, Note 2
OUT
OUT
Output Power ( P
)
V
V
92
OUT
IN
IN
Output Current ( I
)
0
1.05
OUT
V
V
= 190, 270, 400 Volts, Notes 1, 4
IN
Line Regulation ( VR
)
1,2,3
1,2,3
-900
-920
900
920
mV
LINE
I
= 10, 50, 100% Rated Load
OUT
= 190, 270, 400 Volts, Notes 1, 4
IN
mV
mA
Load Regulation ( VR
)
LOAD
I
= 10, 50, 100% Rated Load
OUT
Input Current, No Load ( I
Input Ripple Current
)
1,2,3
1,2,3
1,2,3
I
= 0. Pin 4 open
OUT
20
230
5.0
IN
I
= 100% Rated Load, BW = 10MHz
Pin 4 shorted to Pin 2
mA
P-P
OUT
Input Current Inhibited
mA
V
Input Under Voltage Lockout
Turn-on (Input Voltage Rising)
1,3
2
160
160
180
190
Min Load, Note 1
Turn-off (Input Voltage Decreasing)
1,2,3
135
160
V
= 190, 270, 400 Volts, Notes 1, 3
IN
1,2,3
600 mVP-P
%
Output Ripple ( V
)
RIP
I
= 10%, 100% Rated Load
OUT
1,2,3
1,2,3
80
85
Efficiency ( E
)
I
= 100% Rated Load , Note 1
Sync. Input (Pin 6) open
FF
OUT
Switching Frequency ( F
Synchronization Input
Frequency Range
)
470
580
kHz
S
1,2,3
1,2,3
1,2,3
1,2,3
1,2,3
500
4.0
600
10
kHz
V
Pulse Amplitude, High
Pulse Amplitude, Low
Pulse Rise Time
Notes 1, 12
-0.5
0.8
100
80
V
ns
%
Pulse Duty Cycle
20
For Notes to Electrical Performance Characteristics, refer to page 4
2
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HTM27092S
PRELIMINARY
Electrical Performance Characteristics (continued)
Conditions
Limits
≤
≤
+165°C
-20°C
T
C
V
= 270V DC ± 5%, C = 0
Group A
IN
L
Subgroup
unless otherwiese specified
Parameter
Min. Nom. Max.
Unit
V
Enable Input ( Inhibit Function )
Open Circuit Voltage
Notes 1, 12
1,2,3
3.0
5.0
100
50
Drive Current ( Sink )
µ
A
-0.5
Voltage Range
V
Current Limit Point
Expressed as a Percentage
V
= 90% of Nominal
%
W
1,2,3
1,2,3
105
150
35
OUT
of Full Rated Output Power
Short Circuit, Overload, Note 7
Power Dissipation, Load Fault ( P
)
D
Load Transient Response
Amplitude
4,5,6
4,5,6
Load Step, 50% to/from 100%
Notes 1, 8
-5000
-5000
+5000
1200
mV
Recovery
µs
Amplitude
Load Step, 10% to/from 50%
Notes 1, 8
+5000
1200
mV
Recovery
µs
Line Transient Response
Amplitude
Input Voltage Step, 190V to/from 400V
4,5,6
I
= 100% Rated Load
Notes 1, 9, 10
-3000
+3000
1500
mV
OUT
Recovery
µs
Turn-on Response
V
= 190, 270, 400 Volts
IN
4,5,6
1
2000
60
mV
ms
Overshoot ( V
)
I
= 50% Rated Load
Notes 1, 11
OS
OUT
Turn-on Delay ( T
)
5.0
DLY
I
= 100% Rated Load
OUT
Capacitive Load ( C )
L
1000
µF
No effect on DC Performance
Notes 1, 5, 6, 12
MIL-STD-461, CS101
Line Rejection
1
1
40
50
dB
30Hz to 50KHz, Notes 1, 12
Input to Output or Any Pin to Case
except Pin 10, test @ 500VDC
Isolation
100
ΜΩ
Device Weight
80
g
For Notes to Electrical Performance Characteristics, refer to page 4
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3
HTM27092S
PRELIMINARY
Notes for Electrical Performance Characteristics Table
1. Unless otherwise specified, “Rated” load is 92 watts, 1.0 Amps.
2. Parameter verified during line and load regulation tests.
3. Guaranteed for a D.C. to 20 MHz bandwidth. Tested using a 20 kHz to 10 MHz bandwidth.
4. Load is varied for output under test. Regulation relative to output voltage at 50% rated load.
5. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance.
6. A capacitive load in excess of the maximum limit may interfere with the proper operation of the
converter’s overload protection, causing erratic behavior during turn-on.
7. Overload power dissipation is defined as the device power dissipation with the load set such that
VOUT= 90% of nominal.
8. Load step transition time ≥ 10µs.
9. Recovery time is measured from initiation of the transient to where VOUT has returned to within ±1% of
steady state value.
10. Line step transition time ≥ 100µs.
11. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on
the inhibit pin to the point where VOUT = 90% of nominal.
12. Parameter is tested as part of design characterization or after design changes. Thereafter, parameter
shall be guaranteed to the limits specified.
Fig 1. Circuit for Measuring Output Ripple Voltage
1 µF
50 Ω
50 Ω Coax
Oscilliscope or Equivalent
with 10 MHz Bandwidth.
Multiply readings by 2.
0.1 µF
+ Vout
Return
50 Ω
Termination
DUT
RL for IRATED
4
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HTM27092S
PRELIMINARY
Typical Efficiency Curves
Fig 2: Efficiency vs Output Current at 25°C with Vin = 190V, 270V and 400V
E fficiency vs Output Current at 25°C
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
190V Vin
270V Vin
400V Vin
Output Current, A
Fig 3: Efficiency vs Output Current at 165°C with Vin = 190V, 270V and 400V
E fficiency vs Output Current at 165°C
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
190V Vin
270V Vin
400V Vin
Output Current, A
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5
HTM27092S
PRELIMINARY
Fig 4: Efficiency vs Temperature, Load = 1.0A with Vin = 190V, 270V and 400V
6
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HTM27092S
PRELIMINARY
Load Transient Waveforms.
Fig 5: Load Transient at 25°C, Vin = 270V, Load = 0.1A to 0.5A, Ch2 = Vout
Fig 6: Load Transient at 165°C, Vin = 270V, Load = 0.1A to 0.5A, Ch2 = Vout
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HTM27092S
PRELIMINARY
Fig 7: Load Transient at 25°C, Vin = 270V, Load = 0.5A to 1.0A, Ch2 = Vout
Fig 8: Load Transient at 165°C, Vin = 270V, Load = 0.5A to 1.0A, Ch2 = Vout
8
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HTM27092S
PRELIMINARY
Technical Notes
Remote Sensing
Connection of the + Sense and - Sense leads at a remotely located load permits compensation for resistive voltage drop
between the converter output and the load when they are physically separated by a significant distance. This connection
allows regulation at the point of application. To minimize noise pickup that could interfere normal operation of the
converter, a twisted pair for remote sensing is highly recommended. When the remote sensing features is not used, the
sense leads should be connected to their respective output terminals at the converter.
Notes:
(1) If the +Sense connection is unintentionally broken, the converter has a fail-safe output voltage of Vout + 25mV, where
the 25mV is independent of the nominal output voltage.
(2) In the event of both the +Sense and -Sense connections being broken, the output will be limited to Vout + 440mV. This
440mV is also essentially constant independent of the nominal output voltage. While operation in this condition is not
damaging to the device, not all performance parameters will be met.
(3) The +Sense Pin shall be kept from being shorted to the -Sense Pin or the Output Return Pin through a resistance path
<5kΩ, or permanent damages will occur inside the converter.
Inhibiting Converter Output
As an alternative to application and removal of the DC voltage to the input, the user can control the converter output by
providing TTL compatible negative logic (LOW active) signal to Inhibit Pin (Pin 4) with respect to the Input Return Pin (Pin
2). The Inhibit Pin is internally pulled “high” so that when not used, an open connection on the Inhibit Pin permits normal
converter operation. When its use is desired, a logical “low” on this port will shut the converter down.
Synchronization of Multiple Converters
When operating multiple converters, system requirements often may require operation of the converters at a common
frequency. To accommodate this requirement, the converters provide both a synchronization input and output.
The Sync Input port permits synchronization of a HT connverter to any compatible external frequency source operating
between 500 kHz and 600 kHz. This input signal should be referenced to the Input Return and has a 10% to 90% duty
cycle. Compatibility requires transition times less than 100ns, maximum low level of +0.8V and a minimum high level of
+2.0V. The Sync Output of a converter which has been designated as the master oscillator provides a convenient
frequency source for this mode of operation. When external synchronization is not required, the Sync In Pin should be left
unconnected thereby permitting the converter to operate at its own internally set frequency.
The sync output signal is a continuous pulse train factory-set at 520 ± 50 kHz, with a duty cycle of 15 ± 5.0%. This signal
is referenced to the Input Return and has been tailored to be compatible with the Sync Input port. Transition times are less
than 100ns and the low level output impedance is less than 50Ω. This signal is active when the DC input voltage is within
the specified operating range and the converter is not inhibited. This output has adequate drive capability to synchronize
at least five additional converters.
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9
HTM27092S
PRELIMINARY
Output Voltage Adjust - For Higher or Lower Output Voltage
In addition to permitting close voltage regulation of remotely located loads, the converter has a Vadj Pin allowing the users
to trim its output voltage up or down for their applications. The adjustment range is limited to +10% , -20% maximum. The
adjustments are intended as a means to “trim” the output to a voltage setting for certain design application, but are not
intended to create a variable output converter. an adjustable output converter. The output voltage is done by connecting
a resistor with an appropriate value between the Vadj Pin and either +Sense and or -Sense Pins while as shown in Fig. 9
below. The resistance value for a desired output voltage can be determined by formulae described below.
Fig 9: Connection for VOUT Adjustment
Voltage Trimming Procedure:
(1) Nominal Output Voltage with Vadj Pin (Pin 11) Open: 92V
(2) Trimming Up Output Voltage by installing a trimming resistor Radj (1/4W, 1%) between the Vadj Pin (Pin 11)
and -SENSE Pin (Pin 9):
Radj = [ 8950 / [10 * (Vout - 2.5) - 895 ] ] - 50; Radj in kΩ, Vout in Volts
Example: To trim Vout up to 94V
Radj = [ 8950 / [10 * (24 - 2.5) - 895 ] ] - 50 = [ 8950 / 20 ] - 50 = 397.5 (kΩ)
Thus, Vout can be trimmed up to 94V by installing a 1/4W, 1%, 397.5 5kΩ resistor between the Vadj Pin (Pin 11)
and the -SENSE Pin (Pin 9).
(3) Trimming Down Output Voltage by installing a trimming resistor Radj (1/4W, 1%) between the Vadj Pin (Pin 11)
and +SENSE Pin (Pin 10)
Radj = [ 3580 * (Vout - 2.5) ] / [ 895 - 10 * (Vout - 2.5 ) ]; Radj in kΩ, Vout in Volts
Example: To trim Vout down to 20V
Radj = [ 3580 * (90 - 2.5) ] / [ 895 - 10 * (90 - 2.5 ) ] = 313250 / 20 = 15662.5 (kΩ)
Thus, Vout can be trimmed down to 90V by installing a 1/4W, 1% 15662.5 kΩ (15.6625 MΩ) resistor between the
Vadj Pin (Pin 11) and the +SENSE Pin (Pin 10).
10
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HTM27092S
PRELIMINARY
Share Function - Paralleling Converters for Higher Output Current or Reliability Redundancy
The converter has a built-in OR-ing diode, rated 300V/10A and connected to the Share Pin as indicated in Fig 10. Multiple
converters can be paralleled and configured as shown in Fig 10 for the following purposes:
(1) Paralleling for higher output current: Several converters can be paralleled for sharing higher output current demand
at the expense of some degradation in the load regulation.
(2) N+1 Redundancy for fault tolerance and extra system reliability: When one of the paralleled converters fails with a
lower output voltage or short, it will be isolated from the rest of the converters in parallel. The system can continue to
function normally.
Note: Direct connection of the +Sense Pin to a remote load is not recommended due to potential control loop contention
that could interfere the overall sharing stability or loss of fault isolation. Consult factory for additional application specific
options.
Fig 10: Connection for Share Pin
Mounting Procedure
DC-DC converters are constructed with aluminium-silicon (ALSi) controlled expansion alloy benefit from low mass, high
thermal conductivity, and CTE match to substrates mounted in them. The one disadvantage over traditional cold rolled
steel packages (CRS) however is that the ALSi material is more brittle than the CRS. For this reason, it is important to avoid
using a thermal pad or gasket.
The DC-DC converter requires 6-32 size screws and #6 flat washers.
The minimum recommended mounting surface flatness is 0.002” per inch.
The Procedure for mounting the converter is as follows:
1. Check all surfaces for foreign material,burrs, or anything that may interfere with the different parts.
2. Place the converter on the mounting surface and line up with mounting holes.
3. Install screws using appropriate washers and tighten by hand (~ 4 in.oz) in the sequence shown below in the diagram
4. Tighten the screws with appropriate torque driver using a controlled torque of up to 20-24 in.lb in the sequence
as shown in the diagram below.
4
2
3
1
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11
HTM27092S
PRELIMINARY
Fig 11 . Block Diagram
Output
Filter
7 +Output
DC
Input
Input
Filter
1
Share
12
Output
Output
Filter
Current
Sense
Output
Return
Bias
Supply
8
Inhibit
Case
4
3
Input
Return
2
+Sense
Trim
10
11
9
Error Amp.
&
Ref.
Sync
Input
Drive
Control
Vfb
6
5
-Sense
Sync
Output
Pin Designation Table
Pin #
Description
Pin #
Description
1
2
3
4
5
6
DC Input
Input Return
Case
7
8
+ Output
Output Return
- Sense
9
Inhibit
10
11
12
+ Sense
Sync. Output
Sync. Input
Trim
Share Output
12
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HTM27092S
PRELIMINARY
Mechanical Diagram
4.00
2.50
0.750
0.25
1
2
3
4
5
6
12
11
10
9
8
7
0.200 Typ. Non-cum.
1.000
Ref.
1.50 1.80 2.15
Pin Ø0.040
38°
0.25
0.22
3.00
FLANGE DETAIL
4.48 Ref.
0.24
Ø 0.300
Ø 0.144
0.400 Max.
0.50
Mounting Surface
Tolerance: .XX ±0.01
.XXX ±0.005
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13
HTM27092S
PRELIMINARY
Device Screening
Requirement
MIL-STD-883
Condition
No Suffix
/EM suffix
(Production (For Engineering
Method
Qualilty)
Evaluation)
Internal Visual
Seal (Laser Weld)
2017
-
X
X
X
X
X
X
1014
-
X
Fine Leak Test (Unpressurized)
Gross Leak Test (Unpressurized)
Temperature Cycling
-
-
X (For info only)
X
-
1010
-
-35°C, +165°C, 10 cycles
Not required
In accordance with
device specification
2001
Electrical
-
X
Not required
Constant Acceleration
Burn-in
3000G for 1 minute
48 hrs @ 165°C
X
X
Not required
1015
8 hours @ 165°C
In accordance with
device specification
1014
Final Electrical (Group A)
-
X
X
Fine Leak Test
Gross Leak Test
External Visual
A2
C1
-
X
X
X
Not required
1014
X
X
2009
Part Numbering
HT M 270 92 S / EM
EM = Engineering Model
Model
HT = 165°C
Blank = No Suffix (production quality)
(Please refer to Device Screening Table for
Specific screening requirements)
Power
M = 92W
Output Configuration
S = Single Output
Nominal Input
Voltage
270 = 270V
Output Voltage
92 = 92V
WORLD HEADQUARTERS: 101 N, Sepulveda Blvd., El Segundo, California 90245, USA Tel: (310) 252-7105
IR SAN JOSE: 2520 Junction Avenue, San Jose, California 95134, USA Tel: (408) 434-5000
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 10/2013
14
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