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Picor Corporation ?picorpower.com
 
 
QPI-8    
 
 
 
Rev 1.5, Page 2 of 17 
 
QPI-8
QUIETPOWER
?/DIV>
 
Absolute Maximum Ratings  Exceeding these parameters may result in permanent damage to the product. 
In ut Volta e BUS+ to BUS- continuous
-80 to 80 Vdc
In ut Volta e BUS+ to BUS- 100ms transient
-100 to 100 Vdc
B   +  B   -
-
-1
1
In ut to out ut current continuous    70癈 T
5.5 Adc
In ut to out ut current Pulsed    25癈 T
12 Adc
Power dissi ation    70癈 T   5.5 A
(2)
 
1.6 W
O eratin tem erature - T
-40 to 125 癈
Thermal resistance
(2)
 - R
-
 usin PCB la out in Fi ure 31
20 癈 W
(2)
-
-
8 癈 W
Stora e tem erature JEDEC Standard J-STD-033B
-55 to 125 癈
Re low tem erature 20 s ex osure
245 癈
E D
B
-2
2
 
Electrical Characteristics  Parameter limits apply over the operating temp. range, unless otherwise noted. 
BUS+ to BUS- in ut ran e
Measured at 5.5 A 70癈 ambient tem erature
(2)
 
UV
 
80
Vdc
BUS+ to QPI+ volta e dro
Measured at 5.5 A 70癈 ambient tem erature
(2)
 
 
100
 
mVdc
B   -
-
?/DIV>
(2)
1
Common mode attenuation
VBUS = 48 V Fre uenc = 250 KHz line im edance = 50?
 
40
 
dB
Di erential mode attenuation    VBUS = 48 V Fre uenc = 250 KHz line im edance = 50?
 
70
 
dB
In ut bias current at 80 V
In ut current rom BUS+ to BUS-
 
15
 
mA
L
D
-
-
2
Under-volta e Threshold UV    Controller Disabled to Enabled no external trim-u .
 
34
 
V
Under-volta e H steresis
Controller Enabled to Disabled no external trim-u .
 
UV - 2
 
V
-
E
D
-
Over-volta e H steresis
Controller Disabled to Enabled no external trim-u .
 
OV - 4
 
V
Power Good Low Volta e
I
 = 1mA
0.2
 
0.6
V
Power Good Leaka e Current     V
D
 = 90V
 
 
1
A
Note 2: See Figure 19  for the current de-rating curve. 
 
Pad Descriptions
D
L
12, 13
BUS+
Positive bus potential
 
1, 16
BUS-
Negative bus potential
7, 8
QPI+
Positive input to the converter
5, 6
QPI-
Negative input to the converter
4
Shield
Shield connects to the system chassis or to a safety ground.
10
PWRGD
Open drain output that asserts low when power in not good.
11
OV
High-side of Over-voltage resistor divider.
14
UVEN
Hi h-side o Under-volta e resistor divider.
2, 3, 15
SW
Hot-Swap controlled negative rail of EMI filter.
9
NC
No internal connection, not used.
 
Ordering Information
D
QPI-8LZ
(3)
     QPI-8 LGA Package, RoHS Compliant 
QPI-8LZ-01
QPI-8 LGA Package, RoHS Compliant, Open Frame Package
Note 3: QPI-8LZ is a non-hermetically sealed package. Please read the Post Solder Cleaning section on page 16. 
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