Input:
Output:
35-75 V
1.8 V
Current:
Package:
40 A
Quarter-brick
Technical Specification
PQ60018QTA40 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 tem-
perature with appropriate power derating. Specifications subject to change without notice.
Parameter
Min.
Typ.
Max.
Units Notes & Conditions
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Non-Operating
100
80
V
V
Continuous
Operating
Continuous
Operating Transient Protection
100
2000
100
125
18
V
100ms transient; square wave
Basic insulation, Pollution Degree 2
Isolation Voltage (input to output)
Operating Temperature
V
-40
-55
-2
°C
°C
V
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
35
48
75
V
32
28.5
2.5
33
29.5
3.5
34
30.5
4.5
3.2
60
V
V
V
A
100% Load, 35 Vin
No-Load Input Current
45
mA
mA
Disabled Input Current
1.6
3
2
Inrush Current Transient Rating
Response to Input Transient
Input Reflected Ripple Current
Input Terminal Ripple Current
Recommended Input Fuse
0.01
A s
150
5
mV
mA
mA
A
1000V/ms input transient; Figure 17
P-P thru 10µH inductor; Figures 13 & 15
RMS; Figures 13 & 14
70
7
Fast blow external fuse recommended
Input Filter Component Values (C1\L\C2)
Recommended External Input Capacitance
OUTPUT CHARACTERISTICS
Output Voltage Set Point (standard option)
Output Voltage Set Point (“A” option1)
Output Voltage Regulation (standard option)
Over Line
1\5\3
47
µF\µH\µF Internal values, see Figure E
µF
Typical ESR 0.1-0.2Ω, see Figure 13
1.782
1.788
1.800
1.800
1.818
1.812
V
V
+
+
0.1 \ 2
0.1 \ 2
0.3 \ 5
0.3 \ 5
%\mV
%\mV
mV
+
+
Over Load
+
+
27
Over Temperature
9
Output Voltage Regulation (“A” option1)
Over Line
+
+
+
+
0.0 \ 0
0.0 \ 0
0.1 \ 2
0.1 \ 2
%\mV
%\mV
mV
Over Load
+
+
13
Over Temperature
2
Total Output Voltage Range (standard option)
Total Output Voltage Range (“A” option1)
Output Voltage Ripple and Noise2
Peak-to-Peak
1.745
1.773
1.855
1.827
V
Over sample, line, load, temperature & life
Over sample, line, load, temperature & life
500MHz bandwidth; Figures 13 & 16
Full Load, see Figures 13 & 16
V
50
10
100
20
mV
mV
A
RMS
Full Load, see Figures 13 & 16
Operating Output Current Range
Output DC Current-Limit Inception
Output DC Current-Limit Shutdown Voltage
Back-Drive Current Limit while Enabled
Back-Drive Current Limit while Disabled
Maximum Output Capacitance
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 (1A/µs)
Settling Time
0
40
Subject to thermal derating; Figures 5 - 8
Output Voltage 10% Low
44
47.5
0.90
1.1
51
A
V
0.5
0
2.0
50
A
Negative current drawn from output
Negative current drawn from output
1.8Vout at 40A Resistive Load
10
mA
µF
35,000
82
dB
120 Hz; Figure 20
80
mV
mV
µs
50% to 75% to 50% Iout max; Figure 11
50% to 75% to 50% Iout max; Figure 12
To within 1% Vout nom
190
400
Turn-On Transient
Turn-On Time
4
200
0
8
ms
ms
%
Full load, Vout=90% nom.; Figures 9 & 10
-40°C to +125°C; Figure F
Start-Up Inhibit Time
180
240
Output Voltage Overshoot
EFFICIENCY
10,000 µF load capacitance, Iout = 0A
100% Load
84.5
88.0
86.5
90.0
%
%
Figures 1 - 4
Figures 1 - 4
50% Load
TEMPERATURE LIMITS FOR POWER DERATING CURVES
Semiconductor Junction Temperature
Board Temperature
125
125
125
°C
°C
°C
Package rated to 150°C
UL rated max operating temp 130°C
See Figures 5 - 8 for derating curves
Transformer Temperature
Note 1: See the last page for ordering information options.
Note 2: For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com)
Product # PQ60018QTA40 Phone 1-888-567-9596 www.synqor.com Doc.# 005-2QT618C Rev. C 09/08/05
Page 3
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