TSMG15-48D120

SMG15-48D120
POWER MODULE: 36-72VDC INPUT, DUAL 120VDC/60mA OUTPUT
FEATURES
   Designed for Span Powering of ETSI HDSL Systems
   High Efficiency
   Input to Output Isolation
   Two Outputs with Independent Protection Mechanism
   Outputs can be Paralleled for Current Sharing, i.e. 120V/120mA
   Adjustable Output Voltage (105 to 120Vdc)
   Wide Input Voltage Range
   Output Unbalanced Indication
   Five year warranty
APPLICATIONS
   HDSL/xDSL Systems
   Voice Pair-Gain Systems
   Supports Single and Dual Loop Configurations
   General Remote Power Feeding Communications Applications
   48Vdc, 60Vdc Telecommunications Systems
   ETSI Remotely Fed Systems
DESCRIPTION
The SMG15-48D120 is a 15 Watt DC/DC converter module especially designed for HDSL/xDSL remote power feeding applications (on LTU).The module operates from 36 to 72Vdc input voltage and provides two independent balanced outputs of 120V/60mA, isolated from the input.The output voltage can be reduced, in the range of 105-120V, by adding an external resistor. Reduction of the output voltage to 105-120V may be required in order to allow for HDSL communication signal superimposing, without exceeding the maximum 120V standard limitation. A high precision current limiting circuit is implemented on each output. This feature enables delivery of maximum power through the line while ,maintaining the TNV safety requirements of maximum 60mA current. The module also provides report lines, which deliver information regarding unbalanced outputs (deviation of more than 20%) and overload condition of each output. The overload protection circuits on each output are independent, and allow for one output to work normally while the other is overloaded.theSMG15-48D120 is Designed for ETSI specific requirements.
ABSOLUTE MAXIMUM RATINGS
Input Voltage ………….. 36 to72 V
Storage Temperature ………….. - 40oC to 100?oC
Isolation Voltage (Input to Output1, Output2) …1500Vdc

PERFORMANCE / FUNCTIONAL SPECIFICATIONS
Unless otherwise indicated, the data below applies to the specified operating input voltage, load (resistive), and temperature range, Cin=10uF.

Num	Parameter	Conditions	min	typ	max	Unit
1	Input voltage		36		72	V
2	Input current				0.55	A
3	Input reflected ripple	Measure on cin=10uF			500	mVp-p
4	Switching Frequency			200		kHz
	Output power				15	W
	Output voltage		105		120	V
	Output current range				60	mA
	Output ripple and noise	Co=10uF~47uF		100	150	mV
	Output voltage regulation(line/load/cross/temperature)	Laod :10 to56mA Load :0 to 56mA			±2.5 ±5	%
	Current limit	Per output	56	57	60	mA
	Efficiency	Vin=48V	79	80		%
5	Input Over-voltage protection		75			V
6	Input Under-voltage protection				35	V
7	CNT	Vcnt=5VVo=OFF,Vcnt==0V,Vo=ON				OK
14	Over-load detection		56	57	60	mA
15	Over-load detection		56	57	60	mA
16	Short circuit protection					OK
17	MTBF		600000			Hours
	Ambient temperature	Derated from +65oC by 280mW/oC	-40 -40		+65 +85	oC
	Relative humidity				93	%
18	Isolation input and output	1500VDC,1min,0.5mA				OK
remark
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PIN CONNECTIONS
Pin Function Description
1 Voutput1- Output 1 ground
2 Voutput1+ Output 1. To ensure proper operation under large load changes, a minimum 10μF Aluminum electrolytic capacitor in parallel to a 1μF film capacitor must be connected.
3 Earth GND Pin 3 should be connected to system GND. Output power is balanced in reference to pin 3.
4 Overload 1 Report line, active when output 1 is in overload or short circuitcondition.
5 Overload 2 Report line, active when output 2 is in overload or short circuit condition.
6 Voltage Adjust Connection of a resistor between pin 6 and 8 enables reducing both output voltages simultaneously in the range of 105-120V. The resistor needs to be 1/8W rated or higher.
7 Earth GND Pin 7 should be connected to system GND. Output power is balanced in reference to pin 3.
8 Voutput2+ Output power #2. To ensure proper operation under large load changes, a minimum 10μF capacitor must be connected.
9 Voutput2 - Output 2 ground
10 vin+ Positive Input line connection.
11 vin- negative Input line connection.
12,13,
16,18 NC Not connected.
14 Unbl. - Return line for Unbl.
15 Unbl+. Report line. Active when output voltage (either or both) become unbalanced in reference to the GND Ground. This may occur when there is an unwanted current path to ground (leakage).
17 CNT Logic input, referenced to the Vinput –(Pin 11). Voltage above the specified threshold will inhibit the operation of the unit, and current consumption on input will drop to a very low level. Leaving this input unconnected or tied to a low logic level will enable the unit.