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PT3401 Datasheet

  • PT3401

  • 35-W 48-V Input Isolated DC/DC Converter

  • 13頁

  • TI

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PT3400 Series
35-W 48-V Input Isolated
DC/DC Converter
SLTS164B - JULY 2002 - REVISED OCTOBER 2002
Features
鈥?/div>
Input Voltage Range:
36V to 75V
鈥?/div>
35W Output Power
鈥?/div>
90% Efficiency
鈥?/div>
1500 VDC Isolation
鈥?/div>
Low Profile (8 mm)
鈥?/div>
Adjustable Output Voltage
鈥?/div>
Dual-Logic On/Off Enable
鈥?/div>
Power-Up Sequence Control
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Differential Remote Sense
Over-Current Protection
Space Saving Package
Solderable Copper Case
Safety Approvals Pending
Description
The PT3400 Excalibur鈩?power modules
are a series of 35-W rated DC/DC converters
housed in a low-profile space-saving copper
case. Fully isolated for telecom applications,
the series includes a number of standard volt-
ages, including 1.0 VDC. Other applications
include industrial, high-end computing, and
other distributed power applications that
require input-to-output isolation.
PT3400 modules incorporate a feature
that simplifies the design of multiple voltage
power supplies in DSP and ASIC applications.
Using the SEQ control pin, the output voltage
of two PT3400 modules in a power supply
system can be made to self sequence at power-
up. Other features include output voltage
adjust, over-current protection, input under-
voltage lockout, and a differential remote
sense to compensate for any voltage drop
between the converter and load.
Ordering Information
PT3401H
PT3402H
PT3403H
PT3404H
PT3405H
PT3406H
PT3407H
PT3408H
= 3.3V/10A
= 2.5V/12A
= 1.8V/12A
= 1.5V/16A
= 1.4V/16A
= 1.2V/16A
= 1V/16A
= 5V/7A
(33W)
(30W)
(21.6W)
(24W)
(22.4W)
(19.2W)
(16W)
(35W)
Pin-Out Information
Pin
1
2
3
4
5
6
7
Function
EN 1
EN 2*
鈥揤
in
+V
in
SEQ
V
out
Adj
鈥揤
sense
鈥揤
out
鈥揤
out
PT Series Suffix
(PT1234x )
Case/Pin
Configuration
Vertical
Horizontal
SMD
Order
Suffix
Package
Code
(EPL)
(EPM)
(EPN)
8
9
10 鈥揤
out
11 +V
out
12 +V
out
13 +V
out
14 +V
sense
* Negative logic
Shaded functions indicate those
pins that are referenced to 鈥揤
in
.
N
A
C
(Reference the applicable package code draw-
ing for the dimensions and PC board layout)
Standard Application
Remote Sense (+)
+V
OUT
L
O
A
D
+
+V
IN
4
+V
SENSE
+V
IN
+V
OUT
14
11鈥?3
1
EN 1
PT3400
鈥揤
OUT
8鈥?0
7
鈥?C
OUT
330碌F
2
EN 2
鈥揤
OUT
* Remote Sense (鈥?
鈥揤
IN
3
鈥揤
IN
SEQ
5
鈥揤
SENSE
V
o
Adj
6
V
O
Adj
SEQ
鈥?An output capacitor is required on models
with an output voltage less than 2.5V.
* 鈥揤
sense
(pin 7) must be connected to -V
out
,
either at the load or directly to pin 8 of the
converter.
For technical support and more information, see inside back cover or visit www.ti.com

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