HPQ Datasheet, PDF (8/10 Pages) Murata Manufacturing Co., Ltd. – Isolated High Power Quarter Brick DC/DC Converters

HPQ Series
Isolated High Power Quarter Brick DC/DC Converters
1 _–INPUT
2 _ON/OFF
CONTROL
3
+INPUT
8
+OUTPUT
7
+SENSE
6
TRIM
5
–SENSE
4
–OUTPUT
RTRIM UP
LOAD
Figure 5. Trim Connections To Increase Output Voltages Using Fixed Resistors
1 _–INPUT
2 _ON/OFF
CONTROL
3
+INPUT
8
+OUTPUT
7
+SENSE
TRIM
–SENSE
6
RTRIM DOWN
5
4
–OUTPUT
LOAD
Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors
Trim Up
Trim Down
HPQ-3.3/50-D48
16.863(1+∆) 5.11
RT _UP (k7) =
1.225x ∆
–
–10.22
∆
5.11
RT_DOWN (k7) = _∆ –10.22
where ∆ is the absolute value of
( ) 3.3 - VOUT
3.3
(∆ is always positive)
TYPICAL PERFORMANCE CURVES
HPQ-3.3/50-D48
Efficiency vs Line Voltage and Load Current @ +25°C
95
24
22
90
20
18
85
VIN = 75 V
VIN = 48 V
16
VIN = 36 V
14
80
12
75
10
8
70
Power Dissipation
VIN = 48 V
6
4
65
2
5
10
15
20
25
30
35
40
45
50
Load Current (Amps)
HPQ-3.3/50-D48
Maximum Current Temperature Derating
(Vin=48V, no baseplate, longitudinal air flow)
50
45
40
35
100 LFM
200 LFM
30
300 LFM
400 LFM
25
20
15
10
30
40
50
60
70
80
Ambient Temperature (°C)
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