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PT4827 Datasheet

  • PT4827

  • 35-W Triple Output Isolated DC/DC Converter for Logic Applic...

  • 32頁

  • TI

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PT4820 Series
35-W Triple Output Isolated DC/DC
Converter for Logic Applications
SLTS165E - FEBRUARY 2002 - REVISED MARCH 2003
Features
鈥?/div>
Triple Outputs
(Independently Regulated)
鈥?/div>
Input Voltage Range:
36V to 75V, 80V Surge
鈥?/div>
1500VDC Isolation
鈥?/div>
Dual Logic On/Off Control
鈥?/div>
Short-Circuit Protection
(All Outputs)
鈥?/div>
Fixed Frequency Operation
鈥?/div>
Over-T
emperature Shutdown
鈥?/div>
Under-Voltage Lockout
鈥?/div>
Space Saving Package:
1.3 sq. in. PCB Area (suffix N)
鈥?/div>
Solderable Copper Case
鈥?/div>
Safety Approvals:
UL60950
CSA 22.2 950
VDE EN60950
Description
The PT4820 Excalibur鈩?power
modules are a series of isolated triple-
output DC/DC converters that
operate from a standard (鈥?8V)
central office supply. Rated for up to
35W, these regulators are ideal for
powering many mixed logic appli-
cations. The triple-output voltage
combination allows for a compact
multiple-output power supply in a
single low-profile DC/DC module.
The available output voltage
options include a low-voltage power
bus for a DSP or ASIC core, and
two additional standard logic supply
voltages.
The PT4820 series incorporates
many features to simplify system
integration. These include a flexible
On/Off enable control, an input
under-voltage lock-out, and over-
temperature protection. All outputs
have short-circuit protection and are
internally sequenced to meet the
power-up and power-down require-
ments of popular DSP ICs.
The PT4820 series is housed in
a space-saving solderable case. The
module requires no external heat sink
and can occupy as little as 1.3 in
2
of
PCB area.
Ordering Information
PT4821o
PT4822o
PT4823o
PT4824o
PT4825o
PT4826o
PT4827o
PT4828o
PT4829o
PT4831o
PT4832o
* PT4833o
=
=
=
=
=
=
=
=
=
=
=
=
+3.3/+2.5/+1.5V
+3.3/+1.8/+1.5V
+3.3/+2.5/+1.2V
+3.3/+1.8/+1.2V
+3.3/+1.5/+1.2V
+5.0/+3.3/+1.8V
+3.3/+2.5/+1.8V
+5.0/+2.5/+1.5V
+5.0/+1.8/+1.5V
+5.0/+3.3/+1.5V
+5.0/+3.3/+2.5V
+3.3/+2.0/+1.5V
*
The PT4833 is not included in the VDE
safety certification.
PT Series Suffix
(PT1234
x
)
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
(ENM)
(ENN)
(ENP)
N
A
C
(Reference the applicable package code drawing for
the dimensions and PC layout)
Typical Application
PT4820
+V
IN
+Vo
1
3
+V
IN
V
1
Adj
12,13
11
Co
1
+
I/O
COM 9,10
16,17
15
Co
2
+
Logic
DSL, DSP,
or ASIC
Chipset
+Vo
2
+
C
IN
1
2
V
2
Adj
EN 1
COM 14
EN 2
+Vo
3
4
鈥揤
IN
V
3
Adj
20,21
19
Co
3
+
Core
鈥揤
IN
Cin
Co
1
, Co
2
, Co
3
EN1 & EN2 pins:
= Optional
= Optional; See specifications
See On/Off Enable Logic
COM 18
For technical support and more information, see inside back cover or visit www.ti.com
1

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