ASQ48T15018 & ASQ48S15018 DC-DC Converter Data Sheet
36 to 75 VDC Input; 15A, 1.8 VDC Output
Description
ASQ48 Series DC-DC converters are ideally suited for
aerospace applications where high-reliability, low profile, and
low weight are critical. They are designed for reliable
operation in harsh thermal and mechanical environments.
In high-ambient temperature applications the ASQ48 Series
15A converters provide thermal performance that often
exceeds competing DC-DC converters that have a higher
nominal rating and much larger package size. This is
accomplished using patent-pending circuit, packaging, and
processing techniques to achieve ultra-high efficiency,
excellent thermal management, and a very low body profile.
Coupled with Power-One’s use of 100% automation for
assembly; this results in a product with extremely high
quality and reliability.
Available in both through-hole and surface-mount packages,
the ASQ48 Series converters are also ideal for environments
with little or no airflow.
20
ASQ48T15018 and ASQ48S15018 Converters
Features
•
•
•
RoHS lead solder exemption compliant
Delivers up to 15 A (50 W)
Operates from -55
°C
to 85
°C
ambient
Survives 1000 g mechanical shock, MIL-STD-883E
High reliability: MTBF 3.4 million hours, calculated per
Telcordia TR-332, Method I Case 1
Available in through-hole and SM packages
Low weight: 0.53 oz (15 g)
Low profile: 0.26” (6.6 mm)
Extremely small footprint: 0.896” x 2.30” (2.06 in
2
)
High efficiency – no heat sink required
On-board input differential LC-filter
Extremely low output and input ripple
Start-up into pre-biased output
No minimum load required
2,000 VDC I/O Isolation
Meets Basic Insulation requirements of EN60950
Meets input voltage transient of 100 V for 100 ms
Does not use opto-isolators
Fixed-frequency operation
Fully protected
Remote output sense
Output voltage trim range: +10%/-20%
Positive or negative logic ON/OFF option
UL 60950 recognized in U.S. & Canada, and TUV
certified per IEC/EN 60950
Meets conducted emissions requirements of FCC
Class B and EN55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
•
•
•
•
Load Current [Adc]
15
10
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
5
0
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fig. 1:
Available load current vs. ambient air temperature and air-
flow rates for ASQ48T15018 converter with D height pins mounted
vertically with air flowing from pin 3 to pin 1, MOSFET temperature
≤
120°C, Vin = 48 V.
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JUN 06, 2007
Page 1 of 15
www.power-one.com
ASQ48T15018 & ASQ48S15018 DC-DC Converter Data Sheet
36 to 75 VDC Input; 15A, 1.8 VDC Output
Electrical Specifications
Conditions: T
A
=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=48 VDC, unless otherwise specified.
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Operating Ambient Temperature
Storage Temperature
Continuous
NOTES
MIN
0
-55
-55
36
TYP
MAX
80
85
125
UNITS
VDC
°C
°C
VDC
VDC
VDC
VDC
μF
ADC
ADC
A
Arms
VDC
ρF
MΩ
kHz
%
%
%
°C
ms
ms
VDC
VDC
VDC
VDC
INPUT CHARACTERISTICS
Operating Input Voltage Range
Input Under Voltage Lockout
Turn-on Threshold
Turn-off Threshold
Input Voltage Transient
48
34
32
75
35
33
100
15,000
15
20
40
5.3
Non-latching
33
31
100 ms
Plus full load (resistive)
Non-latching
Non-latching. Short=10mΩ.
Non-latching
0
16.5
16.5
18
30
OUTPUT CHARACTERISTICS
External Load Capacitance
Output Current Range
Current Limit Inception
Peak Short-Circuit Current
RMS Short-Circuit Current
ISOLATION CHARACTERISTICS
I/O Isolation
Isolation Capacitance
Isolation Resistance
2000
160
10
415
Use trim equations on Page 7
1
FEATURE CHARACTERISTICS
Switching Frequency
1
Output Voltage Trim Range
Remote Sense Compensation
Output Over-Voltage Protection
Over-Temperature Shutdown (PCB)
Auto-Restart Period
Turn-On Time
ON/OFF Control (Positive Logic)
Converter Off
Converter On
ON/OFF Control (Negative Logic)
Converter Off
Converter On
-20
117
122
125
100
4
+10
+10
127
Percent of V
OUT
(
NOM
)
Non-latching
Non-latching
Applies to all protection features
From ENABLE to 95% of V
OUT
(
NOM
)
-20
2.4
2.4
-20
0.8
20
20
0.8
Additional Notes:
1. Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all sources
should not exceed 10% of V
OUT
(
NOM
), in order to insure specified operation of over-voltage protection circuitry. See further discussion at end of
Output Voltage Adjust /TRIM
section.
JUN 06, 2007
Page 2 of 15
www.power-one.com
ASQ48T15018 & ASQ48S15018 DC-DC Converter Data Sheet
36 to 75 VDC Input; 15A, 1.8 VDC Output
Electrical Specifications (continued)
Conditions: T
A
=25 ºC, Airflow=300 LFM (1.5 m/s), Vin=48 VDC, unless otherwise specified.
PARAMETER
INPUT CHARACTERISTICS
Maximum Input Current
Input Stand-by Current
Input No Load Current (0 load on the output)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
NOTES
15 ADC, 1.8 VDC Out @ 36 VDC In
Vin = 48 V, converter disabled
Vin = 48 V, converter enabled
See Figure 24 - 25 MHz bandwidth
120 Hz
MIN
TYP
MAX
0.9
UNITS
ADC
mADC
mADC
mA
PK-PK
dB
VDC
mV
mV
VDC
mV
PK-PK
mV
mV
µs
%
%
3
29
7.5
TBD
1.782
1.800
±2
±2
1.818
±4
±5
1.827
50
OUTPUT CHARACTERISTICS
Output Voltage Set Point (no load)
Output Regulation
Over Line
Over Load
Output Voltage Range
Output Ripple and Noise - 25 MHz bandwidth
Over line, load and temperature
Full load + 10
μF
tantalum + 1
μF
ceramic
Co = 1
μF
ceramic (Fig.19)
Co = 450
μF
tant. + 1
μF
ceramic (Fig.20)
2
1.773
30
80
100
100
84.5
85
DYNAMIC RESPONSE
Load Change 25% of Iout Max, di/dt = 0.1 A/μS
di/dt = 5 A/μS
Setting Time to 1%
EFFICIENCY
100% Load
50% Load
Additional Notes:
2. -55 ºC to 85 ºC
JUN 06, 2007
Page 3 of 15
www.power-one.com
ASQ48T15018 & ASQ48S15018 DC-DC Converter Data Sheet
36 to 75 VDC Input; 15A, 1.8 VDC Output
Physical Information (Through-Hole)
1
2
3
8
7
Pin Connections
Pin #
1
2
3
4
5
6
7
8
•
•
Function
Vin (+)
ON/OFF
Vin (-)
Vout (-)
SENSE(-)
TRIM
SENSE(+)
Vout (+)
TOP VIEW
6
5
4
SIDE VIEW
Height
Option
A
B
C
D
E
HT
(Maximum Height)
+0.000 [+0.00]
-0.038 [-0.97]
0.303 [7.69]
0.336 [8.53]
0.500 [12.70]
0.400 [10.16]
0.282 [7.16]
CL
(Minimum Clearance)
+0.016 [+0.41]
-0.000 [-0.00]
0.030 [0.77]
0.063 [1.60]
0.227 [5.77]
0.127 [3.23]
0.009 [0.23]
Pin
Option
A
B
C
PL
(Pin Length)
±0.005 [±0.13]
0.188 [4.77]
0.145 [3.68]
0.110 [2.79]
•
•
•
•
All dimensions are in inches [mm]
Pins 1-3 and 5-3.5 Are Ø 0.040”
[1.02]
with Ø 0.078” [1.98] shoulder
Pins 4 and 8 are Ø 0.062” [1.57]
without shoulder
Pin Material: Brass
Pin Finish: Tin/Lead over Nickel
Converter Weight: 0.53 oz [15 g]
Converter Part Numbering Scheme
Product
Series
Input
Voltage
Mounting
Scheme
Rated
Load
Current
Output
Voltage
ON/OFF
Logic
Maximum
Height (HT)
Pin
Length (PL)
Special
Features
ASQ
One-Eighth
Brick
Format
48
T
Through-
hole
15
018
-
N
N
⇒
Negative
P
⇒
Positive
B
A
⇒
0.303”
B
⇒
0.336”
C
⇒
0.500”
D
⇒
0.400”
E
⇒
0.282”
A
A
⇒
0.188”
B
⇒
0.145”
C
⇒
0.110”
0
36-75 V
15 ADC
018
⇒
1.8 V
0
⇒
STD
The example above describes P/N ASQ48T15018-NBA0: 36-75 V input, through-hole mounting, 15 A @ 1.8 V output, negative ON/OFF logic, a
maximum height of 0.336”, and a through the board pin length of 188”. Please consult factory regarding availability of a specific version.
JUN 06, 2007
Page 4 of 15
www.power-one.com
ASQ48T15018 & ASQ48S15018 DC-DC Converter Data Sheet
36 to 75 VDC Input; 15A, 1.8 VDC Output
Physical Information (Surface Mount)
1
2
3
8
7
Pin Connections
Pin #
1
2
3
4
5
6
7
8
•
•
•
•
•
Function
Vin (+)
ON/OFF
Vin (-)
Vout (-)
SENSE(-)
TRIM
SENSE(+)
Vout (+)
TOP VIEW
6
5
4
SIDE VIEW
All dimensions are in inches [mm]
Connector Material: Copper
Connector Finish: Tin/Lead over Nickel
Optional: Gold over Nickel
Converter Weight: 0.53 oz [15 g]
Recommended Surface-Mount Pads:
Min. 0.080” x 0.112” [2.03 x 2.84]
Max. 0.092” x 0.124” [2.34 x 3.15]
Converter Part Numbering Scheme
Product
Series
Input
Voltage
Mounting
Scheme
Rated
Load
Current
Output
Voltage
ON/OFF
Logic
Maximum
Height
Pin
Length
Special
Features
ASQ
One-Eighth
Brick
Format
48
36-75 V
S
Surface
Mount
15
15 ADC
018
018
⇒
1.8 V
-
N
N
⇒
Negative
P
⇒
Positive
S
S
⇒
0.273”
0
0
⇒
0.00”
0
0
⇒
STD
The example above describes P/N ASQ48S15018-NS00: 36-75 V input, surface mounting, 15 A @ 1.8 V output, negative ON/OFF logic. Please
consult factory regarding availability of a specific version.
JUN 06, 2007
Page 5 of 15
www.power-one.com
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