PT4520 Series
20-W 48-V Input Isolated
DC/DC Converter
SLTS148B - JUNE 2000 - REVISED OCTOBER 2002
Features
• Input Voltage Range:
36V to 75V
• Remote On/Off
• Differential Remote Sense
• Short Circuit Protection
• Over Temperature Shutdown
• Space Saving Package:
1.0 sq. in. PCB Area (Suffix N)
• Safety Approvals Pending
• 20W Rated
• Output Voltages: 1.2V to 15V
• 82% Efficiency
• 1500 VDC Isolation
• Low Profile (8.5 mm)
• Adjustable Output Voltage
6
• 4×10 Hrs MTBF
Pin-Out Information
Description
Ordering Information
Pin Function
PT4521r = 3.3V/5A (16.5W)
PT4522r = 5.0V/4A
The PT4520 Excalibur™ power modules
are a series of isolated DC/DC converters
housed a new space-saving copper case. The
series includes a number of standard output
voltages ranging from as low as 1.2VDC to
15VDC, each adjustable by up to 10% of
nominal. The modules are ideal for Telecom,
Industrial, Computer, and other distributed
power applications that require input-to-output
isolation.
*
1
Remote On/Off
PT4523r = 12V/1.6A
PT4524r = 15V/1.3A
PT4526r = 1.5V/5A (7.5W)
PT4527r = 1.8V/5A (9W)
PT4528r = 2.5V/5A (12.5W)
PT4529r = 1.2V/5A (6W)
2
–V
in
–V
in
+V
in
+V
in
3
4
5
6
Remote Sense (–)
–Vout
7
8
–Vout
PT Series Suffix
(PT1234x)
9
+Vout
Case/Pin
Order
Package
Using multiple modules, system designers
can implement a complete custom power supply
solution. The flexibility of full isolation also
allows the input or output to be configured for
negative voltage operation.
The PT4520 series is electrically equivalent
to the popular PT4120 series and requires no
additional components for proper operation.
Configuration
Suffix
Code
10
11
12
+Vout
Vertical
Horizontal
SMD
N
A
C
(ELJ)
(ELK)
(ELL)
Remote Sense (+)
V
Adjust *
out
*
For further information, see
application notes.
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
Standard Application
Remote Sense (+)
11
+VOUT
9, 10
+VIN
4, 5
LOAD
PT4520
–VIN
2, 3
–VOUT
7, 8
1
12
6
Remote Sense (–)
VOAdj
Remote
On/Off
Q1
BSS138
For technical support and more information, see inside back cover or visit www.ti.com