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参数资料
| 型号： | PT4741N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 4-OUTPUT 70 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 1/14页 |
| 文件大小： | 321K |
| 代理商： | PT4741N |
For technical support and more information, see inside back cover or visit www.ti.com
Features
Input Voltage: 36V to 75V
Designed for AC6 ADSL
Line-Interface Driver/Receivers
Powers up to 64 Channels
Quad Outputs (±8V, ±3.75V)
Dual Logic On/Off Control
Output Current Limit
Unbalanced Load Protection
Fixed Frequency Operation
Over-Temperature Shutdown
Ordering Information
PT4741
o = ±8.0/±3.75V
PT Series Suffix (PT1234 x )
Case/Pin
Order
Package
Configuration
Suffix
Code
Vertical
N
(EKD)
Horizontal
A
(EKA)
SMD
C
(EKC)
(Reference the applicable package code drawing for
the dimensions and PC layout)
Typical Application
PT4741—48V
Description
The PT4741 Excalibur power
module is a 70-watt quad-output
DC/DC converter that is designed
to meet the power requirements of
Texas Instruments’ TNETD7112.
The TNETD7112 is a dual-channel
line-interface driver/receiver that
compliments the AC6 ADSL chipset
for use in POTS (plain old telephone
service) applications. To conserve
power, the TNETD7112 line drivers
require two pairs of complimentary
power supply voltages. These are
±8V and ±3.75V respectively.
The PT4741 module operates
from a standard (–48V) telecom
central office supply and provides
all four supply voltages as two com-
plimentary balanced loads. (This
product is not suitable for unbalanced
load applications.) The load capacity
allows the PT4741 to operate up to
32 line-driver ICs, representing 64
ADSL channels.
The PT4741 incorporates many
features to simplify system integra-
tion. These include a flexible On/Off
enable control, input under-voltage
lock-out, and over-temperature pro-
tection. All outputs are short-circuit
protected, and internally sequenced
to meet the TNETD7112 power-up
and power-down requirements.
The module is packaged in a
space-saving solderable copper case,
requires no heat sink, and can occupy
as little as 1.9 in2 of PCB area.
Co1, Co2
= Required 33F
Co3, Co4
= Required 150F
EN1 & EN2 pins:
See On/Off Enable Logic
70-W Quad-Output
DC/DC Converter for DSL
SLTS167A - APRIL 2002 - REVISED NOVEMBER 2002
Under-Voltage Lockout
1500VDC Isolation
Solderable Copper Case
Space-Saving Package
1.9 sq. in. PCB Area (suffix N)
Safety Approvals:
UL60950
CSA 22.2 950
VDE EN60950 (Pending)
Dual-Channel
ADSL Driver/Receiver
(TNETD7112)
TXP
RXP
RXN
TXN
VEEHS VCCHS
VEEL
VCCL
PT4741
+V
IN
–V
IN
EN1
EN2
±Vo
2 Adj
±Vo
1 Adj
+Vo
1
–Vo
1
+Vo
2
–Vo
2
COM
+V
IN
–V
IN
+3.75V
–3.75V
+8V
–8V
VEEH VCCH
Power Filter
To
Additional Channels
Co
1
33F
+
Co
2
33F
+
Co
3
150F
+
Co
4
150F
+
COM
1
3
4
2
25
24
23
26
20
19
18
21
AGND
DGND
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