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PT4801 Datasheet

  • PT4801

  • 25-Watt Triple Output 48V-Input Isolated DC/DC Converter for...

  • 8頁(yè)

  • ETC

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PT4801鈥?8V
25-W Triple Output Isolated DC/DC
Converter for DSL Applications
SLTS143A
(Revised 1/29/2002)
Features
鈥?/div>
DSL Triple Outputs:
+15V, +3.3V, +1.5V
(Independantly Regulated)
鈥?/div>
Input Voltage Range:
36V to 75V
鈥?/div>
1500VDC Isolation
鈥?/div>
On/Off 鈥淪tandby鈥?Control
鈥?/div>
Current Limit
鈥?/div>
Short Circuit Protection
(All Outputs)
Fixed Frequency Operation
Over-T
emperature Shutdown
Under-Voltage Lockout
Space Saving Package:
1.6 sq. in. PCB Area (suffix N)
鈥?/div>
Solderable Copper Case
鈥?/div>
Safety Agency Approvals:
UL 60950
CSA C22.2 60950
VDE EN60950
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Description
The PT4801 Excalibur鈩?module is an
isolated triple-output DC/DC converter
that provides +15V, +3.3V, and +1.5V
power supply voltages from a standard
(-48V) telecom central office (CO) supply.
A typical application is a chip-set for an
8 or 16-channel ADSL/DSL line card, or
other mixed signal circuitry. The output
voltage combination provides power for a
processor core, digital logic, and analog
support circuitry. The Vo
2
and Vo
3
outputs
are also designed to meet the power-up/
down sequencing requirements of popular
DSP ICs.
The PT4801 is housed in a space-
saving solderable copper case. A heatsink
is not required. The vertical configura-
tion occupies only 1.6 in
2
of PCB area.
Ordering Information
PT4801o
= +15/+3.3/+1.5 Volts
Pin-Out Information
Pin Function
1
2
3
4
5
6
7
8
9
10
Remote (On/Off)
No Pin
鈥揤
in
鈥揤
in
N/C
+V
in
+V
in
No Pin
No Pin
Vo
1
Pin
11
12
13
14
15
16
17
18
19
20
Function
COM
Vo
2
Adjust
No Pin
Vo
2
Vo
2
COM
COM
Vo
3
Vo
3
Adjust
No Pin
PT Series Suffix
(PT1234
x
)
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
(ENJ)
(ENK)
(ENL)
N
A
C
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
Typical Application
Vo
2
Adjust
Vo
3
Adjust
19
Vo
3
adj
+V
IN
6, 7
+V
IN
12
Vo
2
adj
Vo
1
10
+15VDC
Co
1
PT4801
COM 11
C
IN
1 Remote
On/Off
14, 15
18
DSL/ADSL
IC Chip Set
+3.3VDC
+1.5VDC
Co
3
Co
2
Vo
2
Vo
3
鈥揤
IN
3, 4
鈥揤
IN
COM 16, 17
Cin
= Optional 33碌F
Co
1
/Co
2
= Optional 10碌F to 330碌F per output. (See note 6)
For technical support and more information, see inside back cover or visit www.ti.com

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