High Power 700W industrial dc-dc converter 30V / 24A RoHS TF700-48S30-NOC

Industrial Power Supply 700W Output  30V/24A  TF700-48S30-NOC

 

 

Key Features

Output power: 700W

Wide input range: 36-72VDC

High conversion efficiency: Up to 92%

Line regulation to ±1%

Load regulation to ±1%

Fixed operating frequency

Isolation Voltage :1,500V

Enable (On/Off) Control

Output over-load protection

Output over- voltage protection

Hiccup mode short circuit protection

Over-temperature protection

Input under-voltage lock-out

UL94V-0 flame-retarded rating

RoHS compliant

 

Product Overview

These DC-DC converter modules use advanced power processing, control and packaging technologies to provide the performance, flexibility, reliability and cost effectiveness of a mature power component. High frequency switching provides high power density with low noise and high efficiency.

 

Electric Characteristics

Electrical characteristics apply over the full operating range of input voltage, output load and base plate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the base plate.

 

Input Characteristics

Parameter	Min	Typ	Max	Units	Notes
Input voltage range	36	48	72	Vdc	Continuous
Maximum Input Current			24	A	Full load, Min. input
Standby Input Current			0.2	A	No load
Efficiency	92			%
Recommend External Input Capacitance		470		uF	ESR 0.1-0.2R

 

Output Characteristics

Parameter	Min	Typ	Max	Units	Notes
Output Voltage Range	29.80	30.00	30.20	Vdc
Output Current Range	0		23	A
Line Regulation			±1	%	Vin=36～72V,Io=0～23A
Load Regulation			±1	%	Vin=36～72V,Io=0～23A
Voltages tabilizing precision			±1	%	Vin=36～72V,Io=0～23A
Noise(Peak-to-Peak)		120	250	mV	20 MHz bandwidth. output with 10uF electrolytic capacitor and 0.1uF ceramic capacitor at full rated current.
Maximum Output Cap.	1000	3300	6000	μF	2000uF recommend when Ta≤-5℃
Output Voltage Trim	22		30.5	Vdc	Nominal input; full load; 25°C

 

Dynamic Response Characteristics

Parameter	Min	Typ	Max	Units	Notes
Change in Output Current (di/dt= 0.1A/us)			850	mV	di/dt=0.1A/us,Io=25%-50%-25%Ioutmax or 50% to 75% to 50% Iout max
Settling Time		400		uS	To within 1% Vout nom.
Output voltage overshoot			5	%

 

Functional Characteristics

Parameter	Min	Typ	Max	Units	Notes
Switching Frequency	240	255	270	KHz
Output Voltage Trim			30.5	Vdc	Trim Up, Trim Pin to (+) Vout.
	22			Vdc	Trim Down, Trim Pin to (-) Vout.
Enable Source Current			5	mA
Enable (On - Off Control)  Positive Logic	3.5		15	Vdc	On–Control, Logic high or floating
	-0.3		1.5	Vdc	Off–Control, Logic low
Auxiliary power supply	8		15	Vdc	Continuous source current≤25mA
Working status detection (IOG)					Low impedance when module is ok, high impedance when module failed
Under-Voltage Lockout	32.0		35.9	Vdc	Turn - On threshold
	31.0		35.0	Vdc	Turn - Off threshold
Over-Load Protection	110	125	150	%	Current–Mode, Pulse by Pulse Current Limit Threshold,(%Rated Load)
Output over-voltage protection	33		36	Vdc	Hiccup Mode, Auto Recovery
Over–Temperature Protection	100	105	110	℃	Auto-Recovery, Base palte Temperature
		10		℃	Hysteresis

 

Isolation Characteristics

Parameter	Min	Typ	Max	Units	Notes
Isolation Voltage	1500			Vdc	Input to Output, Leakage current≤1mA
	1000			Vdc	Input to Base plate, Leakage current≤1mA
	500			Vdc	Output to Base plate, Leakage current≤1mA
Isolation Resistance	10			MΩ	At 500VDC to test it when atmospheric pressure and R.H. is 90%
Isolation Capacitance		1000		pF

 

General Characteristics

Parameter	Min	Typ	Max	Units	Notes
Weight			200	g
MTBF	250,000			Hrs

 

Environmental Characteristics

Parameter	Min	Typ	Max	Units	Notes
Operating Temperature	-40		85	℃	Extended, base palte temperature
Storage Temperature	-55		115	℃	Ambient
Humidity	20		90	%R.H.

 

Function Specifications

Enable (ON/OFF) Control (Pin 3 and Pin4):

 The Enable pin allows the power module to be switched on and off electronically. The Enable (On/Off) function is useful for conserving battery power, for pulsed power application or for power up sequencing.

 The Enable pin is referenced to the -Vin. It is pulled up internally, so no external voltage source is required. An open collector (or open drain) switch is recommended for the control of the Enable pin.

 When using the Enable pin, make sure that the reference is really the -Vin pin, not ahead of EMI filtering or remotely from the unit. Optically coupling the control signal and locating the opto coupler directly at the module will avoid any of these problems. If the Enable pin is not used, it can be left floating (positive logic) or connected to the -Vin pin (negative logic).Figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the internal ON/OFF circuitry.

Figure A: Various circuits for driving the ON/OFF pin.

Figure B: Internal ON/OFF pin circuitry

 

Remote Sensing (Pins 7 and 8):

Remote sensing allows the converter to sense the output voltage directly at the point of load and thus automatically compensates the load conductor distribution & contact losses (Figure C). There is one sense lead for each output terminal, designated +Sense and -Sense. These leads carry very low current compared with the load leads. Internally a resistor is connected between sense terminal and power output terminal. If the remote sense is not used, the sense leads needs to be shorted to their respective output leads(Figure D).

 

Care has to be taken when making output connections. If the output terminals should disconnect before the sense lines, the full load current will flow down the sense lines and damage the internal sensing resistors. Be sure to always power down the converter before making any output connections. The maximum compensation voltage for line drop is up to 0.5V

Figure C: Remote Sense Connection

Figure D: Remote Sense Connection

 

Protection Features

·Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value(listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off.

·Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltage drop below the specified Output DC Current-Limit Shutdown Voltage, the converter into hiccup mode indefinite short circuit protection state until the short circuit condition is removed. This prevents excessive heating of the converter or the load board.

·Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value.

 

Test Method

Output Ripple & Noise Test:

  The output ripple is composed of fundamental frequency ripple and high frequency switching noise spikes. The fundamental switching frequency ripple (or basic ripple) is in the 100KHz to 1MHz range; the high frequency switching noise spike (or switching noise) is in the 10 MHz to 50MHz range. The switching noise is normally specified with 20 MHz bandwidth to include all significant harmonics for the noise spikes.

  The easiest way to measure the output ripple and noise is to use an oscilloscope probe tip and ground ring pressed directly against the power converter output pins, as shown below. This makes the shortest possible connection across the output terminals. The oscilloscope probe ground clip should never be used in the ripple and noise measurement. The ground clip will not only act as an antenna and pickup the radiated high frequency energy, but it will introduce the common-mode noise to the measurement as well.

  The standard test setup for ripple & noise measurements is shown in Figure E. A probe socket (Tektronix, P.N. 131.0258-00) is used for the measurements to eliminate noise pickup associated with long ground clip of scope probes.

Figure E: Ripple & Noise Standard Testing Means.

 

 

Mechanical Outline

 

Pin Designations　

Pin No.	Name	Function
1	Vin(-)	Negative input voltage
2	Vin(+)	Positive input voltage
3	ON/OFF-	Negative Enable control
4	ON/OFF+	Positive Enable control
5	Vout+	Positive output voltage
6	Vout-	Negative output voltage
7	S-	Negative remote sense. SENSE(-)must connect to Vout(-)
8	S+	Positive remote sense. SENSE(+)must connect to Vout(+)
9	TRIM	Output voltage trim. Leave TRIM pin open for nominal output voltage.
10	PC	Current sharing
11	IOG	Working status detection
12	AUX	Auxiliary power supply