➤18 Vdc to 400 Vdc input
➤2.1 Vdc to 24.0 Vdc Output
➤105ºC No de-rating
➤Load/Line Regulation: ± 0.1%
➤Peak to Peak Output Ripple: 1%
➤Minimum Load: 0 Ampere
➤Input Undervoltage Lockout
➤Output Over Current Protection
➤Output Over Voltage Protection
➤Over temperature Shutdown
➤Very Low Temperature Rise
➤Switching Frequency: 300 kHz (fixed)
➤High Eff iciency: up to 90%
➤Output Trimming and Remote Sensing
➤Digital On/Off Control
➤N + 1, Current Sharing
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Model Number ing System
IMT 400 - XX - XX
◆Length: 4.6 in (116.8 mm)
◆Width: 2.4 in (61.0 mm)
◆Height: 0.5 in (12.7 mm)
Output Power
(Watts)
200, 400
Nominal Input
Voltage 24, 48, 72,
110, 150, 300 Vdc
Output Voltag e
2.1, 3.3, 5.0, 12.0,
15.0, 24.0 Vdc
TUV Rheinland
BAUART
GEPRUFT
TYPE
APPROVED
®
400 Watts
B
BR
RO
OADB
ADBAND
AND T
TEL
ELC
COM
OM P
PO
OWER
WER,
,I
INC
NC
Low Cost Solutions To Modular Power Supplies
200 Watts
Flat T ransformer Technology Features:
August 2000
BTCPower™
MTBF : Over
700,000 Hours
(Per Mil-Std-217E)
A
B
C
D
Base Plate
Temperature
Up T o 105°C
Actual Size:
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Applications
• Telecommunication systems
• Distributed Power systems
• Industrial application
• Regulated DC power
Product Overview
The unique transformer technology is the basis of BTCPower’s low cost, high performance, and high reliability DC-DC
converter line. These conver ters are designed for telecommunication and industrial applications. The converter
design utilizes a push-pull topology operating at a fixed switching frequency of 300 kHz. By using a f ixed switching
frequency, EMI f iltering is made easier, and less expensive.
The core technology is a patented, modular, and ver y low noise Flat Transformer™ which generates extremely
low leakage inductance and inter-winding capacitance – a combination not available in conventional transformers.
In addition, the Flat Transformer does not create hot spots, therefore, making the conver ters more reliable.
The use of direct bond aluminum base plates, forced cur rent sharing in parallel rectifiers, and the absence of
hot spots in the transformers allow the converter to have ver y low temperature gradients.
The converter’s inter nal temperature rise is less than 10 °C above base plate temperature, allowing base plate
temperature to be raised to 105 °C.
The converters are manuf actured in an ISO 9001 approved facility utilizing advanced automated surface
mount technology and state of the art in-process test procedures.
Objective
The chief objective of the IMT series converters is to reduce costs, while improving high performance and
reliability. This will enable “brick” type modular DC-DC converters to be cost effective in the manufacturing
of quick turn around custom power supplies.
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Input choke
L2
Input Filter choke
L1
Thermal Clad™
Aluminium Baseplate
Direct bond
MOSFETS
Q6, Q8
1) BTCPower’s DC-DC Converters are low cost, and can be delivered in a timely manner because readily available
standard off the shelf components are used. No special custom parts are used.
2) BTCPower’s DC-DC Converters are extremely reliable because of the lower temperature g radient and even
thermal loading:
▲The highly de-rated multiple parallel rectifiers receive exact same shared currents from the use of the
Flat Transformer technology. This ensures even thermal loading on the rectifiers.
▲The Flat Transformer technology uses multiple cores. This coupled with the absence of many turns
eliminates hot spots in the transformer windings.
▲All heat generating components such as the Flat Transfor mers, inductors, rectifiers, and Mosfets are
directly solder-bonded onto the aluminum base plate for maximum transfer of heat out of the converter.
3) BTCPower’s DC-DC Converters utilize simple push pull topology with fewer components. The fixed switching
frequency ensures easier and less expensive EMI f iltering. In addition, negligible leakage inductance of
Flat Transformers reduces the switching losses.
Competitive Advantages:
Flat Transformer™
T1
Output Inductor
L3
Direct bond parallel Rectif iers are used
D10
(Forced equal current sharing due to use
of Flat Transformer™)
IMT 200 and IMT 400
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IMT-200-24-3.3 18-36 10.5 3.3 40 132
IMT-200-24-5 18-36 11.0 5 30 150
IMT-200-24-10 18--36 13.5 10 20 200
IMT-200-24-12 18-36 14.5 12 17 204
IMT-200-48-3.3 36-72 7.0 3.3 50 165
IMT-200-48-5 36-72 7.5 5 40 200
IMT-200-48-10 36-72 7.0 10 20 200
IMT-200-48-12 36-72 7.0 12 17 204
IMT-200-72-3.3 50-100 4.5 3.3 50 165
IMT-200-72-5 50-100 5.5 5 40 200
IMT-200-72-10 50-100 5.0 10 20 200
IMT-200-72-12 50-100 5.5 12 17 204
IMT-200-150-3.3 100-200 2.5 3.3 50 165
IMT-200-150-5 100-200 2.5 5 40 200
IMT-200-150-10 100-200 2.5 10 20 200
IMT-200-150-12 100-200 2.5 12 17 204
IMT-200-150-15 100-200 2.0 15 10 150
IMT-200-300-3.3 200-400 .75 3.3 50 165
IMT-200-300-5 200-400 .86 5 40 200
IMT-200-300-10 200-400 .82 10 20 200
IMT-200-300-12 200-400 .83 12 17 204
IMT-200-300-15 200-400 .62 15 10 150
IMT-240-110-10 66-160 4.5 10 24 240
IMT-240-48-24 36-72 7.8 24 10 240
IMT-210-24-14 18-36 14.5 14 15 210
IMT-240-150-24 100-200 2.8 24 10 240
132 To 240 Watts Model Selection Chart
See IMT 200 Series Outline Drawing For Dimensions
Model Input Voltage
(Vdc) Input Current
(Amperes) Output Voltage
(Vdc) Output Current
(Amperes) Output P o wer
(Watts)
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High Current Series
Model Selection Chart
See IMT 400 Series Outline Drawing For Dimensions
Model Input Voltage
(Vdc) Output Voltage
(Vdc) Output Current
(Amperes) Output P o wer
(Watts)
IMT-400-300-5
IMT-400-300-12
IMT-400-300-15
IMT-400-48-5
IMT-400-48-12
IMT-400-48-15
IMT-400-48-24
IMT-400-300-24
IMT-380-300-3.8
IMT-360-48-3.6
IMT-250-48-2.5
IMT-210-300-2.1
200-400
200-400
200-400
36-72
36-72
36-72
36-72
200-400
200-400
36-72
36-72
200-400
5
12
15
5
12
15
24
24
3.8
3.6
2.5
2.1
80
34
27
80
34
27
17
17
100
100
100
100
400
408
405
400
408
405
408
408
380
360
250
210
210 Watts to 408 Watts
IMT 400 Series
The above models have larger input and output pins.
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4. Mechanical
See mechanical drawing.
The following characteristics are measured under the following conditions unless specified otherwise:
Ambient Temperature: 25°C, Nominal Line and Full Load.
Electrical Characteristics
1.Input Voltage — Please refer to Model Selection Charts: IMT 200 and IMT 400
2.Output Voltage (without trimming) ± 1% of Nominal — Please refer to Model Selection Chart.
3.Output Current — Please refer to Model Selection Char t.
Parameters
Dimension
Weight
Mounting screw type
Suggested screw torque
Units
mm
inches
grams
Ibs
m-Kg
116.8(L) x 61.0(W) x 12.7(H)
4.6(L) x2.4 (W) x 0.5(H)
226
0.10
M3
8.0
Parameters
Reflected ripple current
No load power consumption
Input ripple rejection (120Hz)
Input ripple rejection (1kHz)
Minimum
30
25
Typical
30
35
30
Maximum
35
Units
mA
dB
dB
Please refer to Table 2
5. Input Characteristics
6. Output Characteristics
Parameters
Setpoint accuracy
Load regulation
Line regulation
Output ripple & noise p-p
Output temperature drift
Star t-up overshoot
Transient response:-
Settling time
Over/under-shoot
Tr imming range
Remote sense compensation
Minimum
99
Typical
100
1.0
0.01
100
300
0.1
Maximum
101
0.1
0.1
2.0
0.02
25
200
500
0.15
Test Conditions
10% to 100% load
Low line to high line
20 MHz bandwidth
T
BASE
= 30 to 90°C
10% to 100% load
75% to 100% load change
2.5 A / us
Plus complete trim range
Units
%V
NOM
%V
NOM
%V
NOM
%V
NOM
%
/
°C
mV
µsec
mV
V
Please refer to Table 2 Trim down to 30% is available
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7. Gate Control Characteristics
8. Isolation Characteristics
Active high (or open) in Gate-In Control Pin. Low logic level (0 to 1.8V) will disable the conver ter.
10. Thermal Characteristics
Parameters
Gate in Voltage for ON state
Gate in Voltage for OFF state
Minimum
3.5
0.0
Typical
5.0
Maximum
7.0
1.35
Test Conditions
Units
V
V
Parameters
Isolation (Input to output)
Isolation (Input to baseplate)
Isolation (output to baseplate)
Capacitance (Input to output)
Insulation resistance (Input to output)
Minimum
3,750
2,500
500
Typical
10
50
Maximum
15
Test Conditions
Units
Vac
Vac
Vac
pF
MΩ
Parameters
OVP (Over Voltage Protection) setpoint
OCP (Over Current Protection) setpoint
OTP (Over Temp. Protection) setpoint
Long-term short-circuited current
Minimum
120
110
90
Typical
125
115
100
Maximum
140
120
105
Test Conditions
Base plate temp.
OTP will occur
Units
%VNOM
%Full load
°C
Please refer to Table 2
Parameters
Efficiency
Thermal resistance (without heat sink)
Thermal resistance (with heat sink)
Minimum Typical
5.0
3.0
Maximum Test Conditions
Free air
See Heat sink dimension
Units
°C /W
°C /W
Please refer to Table 2
9. Protection Characteristics
Once the protection circuit is activated, the conver ter will shut down.To reset the conver ter, remove the
fault and turn the power off.Then turn the power on again (non auto-recover y type).
11. Environmental
Parameters
Storage Temperature
Operating Temperature
Storage Humidity
Operating Humidity
Minimum
-40
-25
- 40 is available as an option
0
0
Maximum
125
105
95
95
Units
°C
°C
%
%
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0.30"(7.6mm)
0.30"(7.6mm)
0.70"(17.8mm)
0.70"(17.8mm)
0.04"(1mm) Dia (7) places
- Solder plate
over copper alloy
0.08"(2mm) Dia (2) places
- Solder plate
over copper alloy
9
8
7
6
5
0.22"(5.6mm)
0.50" ± 0.025"
2.40"(61mm)
4.20"(106.7mm)
0.06"(1.5mm)
1
2
4
3
2.00"
4.60"(116.8mm)
4.20"(106.7mm)
PIN # Function
1+ In
2
3
4
5
6
7
8
9
Gate In
NC
- In
+Out
+Sense
Trim
-Sense
-Out
(12.7mm ± 0.6mm)
(50.8mm)
Safety Compliance
• UL : 1950 • CSA : 950
• TUV : EN60950 • CE : Marked
TUV Rheinland
BAUART
GEPRUFT
TYPE
APPROVED
Mechanical Drawing: IMT 200 Outline Drawing
0.30"(7.6mm)
0.30"(7.6mm)
0.70"(17.8mm)
0.70"(17.8mm)
0.08"(2mm) Dia (7) places
- Solder plate
over copper alloy
0.18"(4.5mm) Dia (2) places
- Solder plate
over copper alloy
9
8
7
6
5
0.22"(5.6mm)
0.50" ± 0.025"
2.40"(61mm)
4.20"(106.7mm)
0.06"(1.5mm)
1
2
4
3
2.00"
4.60"(116.8mm)
4.20"(106.7mm)
PIN # Function
1+ In
2
3
4
5
6
7
8
9
Gate In
NC
- In
+Out
+Sense
Trim
-Sense
-Out
(12.7mm ± 0.6mm)
(50.8mm)
Mechanical Drawing: IMT 400 Outline Drawing
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Thermal Consideration: IMT 200 Series
Graph A shows the output power derating (in watts) with heat sink and without heat sink at various ambient
temperatures in still air condition. If an appropriate forced air is used with or without a heat sink, there is no
power deration as illustrated in Graph B. In such a case, the converter can be operated at its full output
power rating.
Heat Sink
Heat Sink material : Aluminum Extrusion
Heat Sink Dimensions (WxHxL) : 2.44” x 0.78” x 4.6”
(62 x 20 x 117 in mm)
Weight : 135 g (0.06 Ibs)
Thermal Impedance = 3.0°C / W
The converter can be operated at full-load with appropriate forced air cooling or by using a lower thermal resistance heat sink.
0
20
40
60
80
100
120
160
180
200
140
020 40 60 80 100 120
Power Output (watts)
with heat sink
without heat sink
Operating Temperature in °C
0
20
50
100
200
150
020 40 60 80 100 120
250
Power Output (watts)
Operating Temperature in °C
(20.00 mm)
(62.00 mm)
2.44"
0.78"
Graph A: Output Power Derating in Still Air Graph B: Output Power With Forced Air
For IMT 200 Series For IMT 200 Series
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Output Trimming
Approximately ±10% output voltage trimming can be achieved by adding a potentiometer. The recommended circuit connection
technique is shown below: The suggested minimum resistance value is 5.1 KΩ.
Reliability (thermal cycling)
Gate Control
A remote on-off Control Pin is provided to enable or disable the converter. When the Gate-In Pin 2 is at logic high (2.8 to 7V) or
open circuited, the converter is enabled. At logic low (<2.8V) the converter is then disabled. If the control signal has a common
return with the primar y side, one can use a NPN transistor circuit to enable/disable the converter. If the control signal is from the
secondary, or anywhere else, an optical couple circuit can be used.
Thermal cycling is in accordance with MIL-STD-883E. A minimum of 10 cycles is used during the test.
+
-
CTL signal
200K Ω
Gate In(P2)
-IN (P4)
+
-
CTL signal
390 ΩGate In(P2)
-IN (P4)
=
+ OUT (P5)
TRIM (P7)
- OUT (P9)
10 20 30 40 50 60 70 80
-40
-20
0
20
40
60
80
100
120
(125)
-15°C / Min.
+15°C / Min.
(- 40)
Temperature in °C
Time in Minutes
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Table 2A. Electrical Characteristics
Model
No load
P o wer Consumption
(Watts)
Output Voltage
Trimming Range
(%VNOM)
Typical
Efficiency
(%)
Long-term
Short-circuited Current
(Amperes)
* Min. Max. Max.
Typical Max.
IMT-200-24-3.3
IMT-200-24-5
IMT-200-24-10
IMT-200-24-12
IMT-200-48-3.3
IMT-200-48-5
IMT-200-48-10
IMT-200-48-12
IMT-200-72-3.3
IMT-200-72-5
IMT-200-72-10
IMT-200-72-12
IMT-200-150-3.3
IMT-200-150-5
IMT-200-150-10
IMT-200-150-12
IMT-200-150-15
IMT-200-300-3.3
IMT-200-300-5
IMT-200-300-10
IMT-200-300-12
IMT-200-300-15
IMT-210-300-2.1
IMT-240-110-10
0.4 0.6
0.4 0.6
0.5 0.8
0.5 0.8
0.5 0.8
0.5 0.8
0.5 0.8
0.6 0.9
0.5 0.8
0.5 0.8
0.6 0.9
0.6 0.9
0.5 0.9
0.5 0.9
0.5 0.9
0.8 1.2
0.8 1.2
1.0 1.5
1.0 1.5
1.0 1.5
1.0 1.5
1.0 1.5
1.2 1.8
0.6 0.9
-5 +8
-5 +8
-8 +8
-8 +8
-6 +9
-8 +8
-8 +10
-8 +10
-6 +9
-8 +10
-8 +10
-8 +10
-6 +9
-8 +10
-8 +10
-8 +10
-8 +10
-6 +9
-6 +9
-8 +10
-8 +10
-8 +10
-8 +10
-8 +10
75
82
82
85
75
82
85
87
78
82
85
86
75
80
83
85
83
72
78
80
81
80
70
85
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.10
0.05
0.05
0.05
0.05
0.02
0.02
0.02
0.02
0.02
0.01
0.01
0.01
0.01
0.01
0.01
0.02
*
Tr im down to - 30% is available as an option.
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Table 2B. Electrical Characteristics
Model
No load
P o wer Consumption
(Watts)
Output Voltage
Trimming Range
(%VNOM)
Typical
Efficiency
(%)
Long-term
Short-circuited Current
(Amperes)
Min. Max. Max.
Typical Max.
IMT-360-48-3.6
IMT-250-48-2.5
IMT-210-300-2.1
IMT-380-300-3.8
IMT-400-48-24
IMT-400-48-5
IMT-400-300-5
IMT-210-24-14
IMT-240-48-24
IMT-240-150-24
0.5
0.93
1.07
1.13
0.93
0.53
0.91
0.76
1.4
3.1
-30 +10
-20 +10
-9.5 +11
-30 +10
-30 +10
-30 +10
-30 +10
-30 +10
-30 +10
-30 +10
75
72
70
72
86
80
81
84
85
88
0.10
0.10
0.01
0.10
0.10
0.10
0.01
0.05
0.04
0.01
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+
-
+
-
+
-
+ In
Gate
In
NC
- In + Out
- S
Trim
+ S
- Out
+ In
Gate
In
NC
- In
+ In
Gate
In
NC
- In
+ Out
- S
Trim
+ S
- Out
+ Out
- S
Trim
+ S
- Out
IMT - 200
IMT - 200
IMT - 200
IMT - 400
IMT - 400
IMT - 400
IMT - 200
Application Circuits 1
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+ OUT
+ S
TRIM
- S
- OUT
+ OUT
+ S
TRIM
- S
- OUT
+ OUT
+ S
TRIM
- S
- OUT
V +
SB
ADJ
+ SEN
- SEN
V +
SB
ADJ
+ SEN
- SEN
V +
SB
ADJ
+ SEN
- SEN
PARA # 2
PARA # 1
PARA # 3
MODULE # 1
MODULE # 2
MODULE # 3
SENSE BUS
SENSE BUS
SENSE BUS
+VOUT
+VOUT
Application Circuit 2
N + 1 and Paralleling Circuit
External current share circuit can be used to parallel IMT 200 and IMT 400 modules
using trim pin. A detailed application note on Current Shar ing is available. Please request
for AN01 or download from our website
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Current Share Module PN: CS01 Outline Drawing
V + SB ADJ
-SEN +SEN
0.1300
0.6600
0.0800
0.4350
0.1300
Vo
3.3V
3.3V
5V
5V
10V
12V
15V
Io
50A
40A
40A
30A
20A
17A
10A
Resistance of Sense Bus
0.66mΩ
0.825mΩ
1.25mΩ
1.67mΩ
5mΩ
7mΩ
15mΩ
Resistance Value of Sense Bus
Vs.
Different Outputs
A
B
C
D
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1719 South Grand Ave., Santa Ana, CA 92705
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Toll Free: 1-888-411-2645
www.btcpower.com
E-mail: sales@btcpower.com