48v to 24v DC-DC Converters MT13-48S24-POC

DC-DC Converters 13W Output 24V MT13-48S24-POC

 

 

Key Features

Output power: 13W

Wide input range:36-72Vdc

High conversion efficiency: Up to 88%

Line regulation to ±0.2%

Load regulation to ±0.5%

Fixed operating frequency

Isolation voltage :1500V

Enable (ON/OFF) control

Output over-voltage protection

Output over-load protection

Hiccup mode short circuit protection

Over-temperature protection

Input under-voltage lock-out

Output voltage trim -5～+10 % Vout

 

Product Overview

These DC-DC converter modules use advanced powerprocessing, control and packaging technologies to providethe performance, flexibility, reliability and cost effectivenessof a mature power component. High frequency Active Clampswitching provides high power density with low noise andhigh efficiency.

 

Product’s Introduction

The MT series is an independently regulated single output converter that uses the industry nonstandard brick packagesize. Integral PCB transformer/inductor is used for all models in this series. This new design technique has greatlyimproved the magnetic coupling, reduced switching spike and provided performance consistency. It also streamlines theproduction process by completely eliminating the hand-wind magnetic assembly process from production lines.

 

Part Numbering — MT5-48S24-POC

 

 

1. 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. All data

testing at Ta=25oC except especial definition.

 

1.1 Absolute Maximum Ratings

Parameter	Min	Typ	Max	Units	Notes
Input Voltage			75	Vdc	Continuous, non-operating
			72	Vdc	Continuous, operating
			75	Vdc	Operatingtransient protection,<100mS
Isolation voltage			2000	Vdc	Input to output
Operating Temperature	-55		100	℃
Storage Temperature	-65		125	℃
Enable to Vin- Voltage	-0.5		10	Vdc

1.2 Input Characteristics

Parameter	Min	Typ	Max	Units	Notes
Input Voltage Range	36	48	72	Vdc	Continuous
Under-Voltage Lockout		34	35	Vdc	Turn-on Threshold
	32	33		Vdc	Turn-off Threshold
Maximum Input Current			0.45	A	Full Load;18Vdc Input
Efficiency		88		%	Full load, derating input voltage.Figures 1-4
Dissipation		0.3		W	No Load
Disabled Input Current		3		mA	Enable pin low
Recommend External Input Capacitance		100		μF	Typical ESR 0.1-0.2Ω

 

1.3 Output Characteristics

Parameter	Min	Typ	Max	Units	Notes
Output Voltage Set Point	23.85	24.00	24.15	Vdc	Nominal input; No load;25℃
Output Voltage Range	23.75	24.00	24.25	Vdc
Output Current Range	0		0.55	A	Subject to thermal derating. Figures 5-7
Line Regulation		±0.02	±0.20	%	Low line to high line; full load
Load Regulation		±0.02	±0.50	%	No load to full load; nominal input
Temperature Regulation		±0.002	±0.005	% / °C	Over operating temperature range
Current Limit	0.60	0.71	0.85	A	Output voltage 95% of nominal
Short Circuit Current	0.50		1.00	A	Output voltage <250 mV
Ripple (RMS)		30		mV	Nominal input; full load; 20 MHzbandwidth. Figure 8
Noise(Peak-to-Peak)		150		mV
Maximum Output Cap			1000	μF	Nominal input; full load
Output Voltage Trim	-5		+10	%	Nominal input; Full load; 25°C

 

1.4 Dynamic Response Characteristics

Parameter	Min	Typ	Max	Units	Notes
Change In Output Current (di/dt= 0.1A/μs)		200		mV	50% to 75% to 50% Iout max. Figure 11
Change In Output Current (di/dt= 0.5A/μs)		200		mV	50% to 75% to 50% Iout max. Figure 12
Settling Time		100		µS	To within 1% Vout nom.
Turn-on Time		2		mS	Full load; Vout=90% nom. Figure 9
Shut-down Fall Time		650		mS	Full load; Vout=10% nom. Figure 10
Output Voltage Overshoot		1		%

 

1.5 Functional Characteristics

Parameter	Min	Typ	Max	Units	Notes
Switching Frequency	180	200	250	KHz	Regulation stage and Isolation stage
Trim(Pin7)					See part 7.2 Voltage Trim(Pin7)
Output Voltage Trim			10	%	Trim Up, Trim Pin to Vout(-)
			5	%	Trim Down, Trim Pin to Vout(+)
Enable(ON/OFF)Control(Pin2)					See part 7.1
Enable Voltage Enable Source Current		5	10	Vdc	Enable pin floating
			0.5	mA
Enable (ON/OFF) Control Positive Logic	2.5		10	Vdc	ON control, Logic high or floating
	-0.5		1.5	Vdc	OFF control, Logic low
Over-Load Protection	110	130	150	%	Current-Mode, Pulse by Pulse CurrentLimit Threshold,(%Rated Load)
Short-Circuit Protection			80	mΩ	Hiccup mode,since the recovery
Over-Temperature Protection		105		℃	Type:Non-Latching,Auto-Recovery；Threshold, PCB Temperature
		15		℃	Hysteresis

 

1.6 Isolation Characteristics

Parameter	Min	Typ	Max	Units	Notes
Isolation Voltage	1500			Vdc	Input to Output
	1500			Vdc	Input to Base
	500			Vdc	Output to Base
Isolation Resistance	10			MΩ	At 500Vdc to test it when atmosphericpressure and R.H. is 90%
Isolation Capacitance		1000		pF

 

2. General Characteristics

Parameter	Min	Typ	Max	Units	Notes
Weight		0.35(10)		Oz (g)	Encapsulated
MTBF ( calculated )	1			MHrs	TR-NWT-000332; 80% load,300LFM,40℃ Ta

 

3. Environmental Characteristics

Parameter	Min	Typ	Max	Units	Notes
Operating Temperature	-55		+100	℃	Extended, base plate temperature
Storage Temperature	-55		+125	℃	Ambient
Temperature Coefficient			±0.02	%/℃
Humidity	20		95	%R.H.	Relative Humidity, Non - Condensing

 

4. Standards Compliance

Parameter	Notes
UL/cUL60950
EN60950
GB4943
Needle Flame Test (IEC 695-2-2)	Test on entire assembly; board & plastic components UL94V-0 compliant
IEC 61000-4-2

 

5. Qualification Specification

Parameter	Notes
Vibration	10-55Hz sweep, 1 min./sweep, 120 sweeps for 3 axis
Mechanical Shock	100g min, 2 drops in x and y axis, 1 drop in z axis
Cold(in operation)	IEC60068-2-1 Ad
Damp heat	IEC60068-2-67 Cy
Temperature Cycling	-40°C to 100°C, ramp 15°C/min., 500 cycles
Power/Thermal Cycling	Vin = min to max, full load, 100 cycles
Design Marginality	Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load
Life Test	95% rated Vin and load, units at derating point, 1000 hours
Solderability	IEC60068-2-20

 

6. Typical Wave And Curves

 

 

Figure 1: Efficiency at nominal output voltage vs. loadcurrent for minimum, nominal, and maximum input voltageat 25°C.

Figure 2: Efficiency at nominal output voltage and 60%rated power vs. airflow rate for ambient air temperatures of25°C, 40°C, and 55°C (nominal input voltage).

 

 

Figure 3: Power dissipation at nominal output voltage vs.load current for minimum, nominal, and maximum inputvoltage at 25°C.

Figure 4: Power dissipation at nominal output voltage and60% rated power vs. airflow rate for ambient airtemperatures of 25°C, 40°C, and 55°C (nominal inputvoltage).

 

 

Figure 5: Maximum output power derating curves vs.ambient air temperature for airflow rates of 0 LFM through400 LFM with air flowing from pin 3 to pin 1 (nominal inputvoltage).

Figure 6: Maximum output power-derating curves vs.ambient air temperature for airflow rates of 0 LFM through400 LFM with air flowing from input to output (nominalinput voltage).

 

 

Figure 7: Thermal plot of converter at full load current(13W) with 25°C at no flowing.

Figure 8: Output voltage ripple at nominal input voltage andrated load current (200 mV/div). Load capacitance: 1μFceramic capacitor and 10μF tantalum capacitor. Bandwidth:20 MHz.

 

 

Figure 9: Turn-on transient at full load (resistive load) (200ms/div).Input voltage pre-applied.Ch 1: Vout (10V/div). Ch 2: ON/OFF input(2V/div).

Figure 10: Shut-down fall time at full load (400μs/div).Ch 1: Vout (10V/div).Ch 2: ON/OFF input (2V/div)

 

 

Figure 11: Output voltage response to step-change in loadcurrent (50%-75%-50% of Iout(max); dI/dt = 0.1A/μs). Loadcap: 10μF, 100 mΩ ESR tantalum capacitor and 1μFceramic capacitor. Ch 1: Vout (500mV/div).

Figure 12: Output voltage response to step-change in loadcurrent (50%-75%-50% of Iout(max): dI/dt = 0.5A/μs). Loadcap: 220μF, 30 mΩ ESR tantalum capacitor and 1μFceramic cap. Ch 1: Vout (500mV/div).

 

7. Physical Information

7.1 Mechanical Outline

 

 

Notes:

1. All pins are 0.024” (0.6mm) dia. without shoulder.

2. Pin4 and Pin6 are parallel connection. The user could achieve the function Vout(+) whether connect either two pins orboth.

3. Tolerances: x.xx ±0.02 in. (x.x ±0.5mm) ,x.xxx ±0.010 in. (x.xx ±0.25mm)

 

7.2 Pin Designations

Pin No.	Name	Function
1	Vin(-)	Negative Input voltage
2	Enable	TTL input to turn converter on and off, referenced to Vin(-), with internal pull up.
3	Vin(+)	Positive Input voltage
4	Vout(+)	Positive Output Voltage
5	Vout(-)	Negative Output Voltage
6	Vout(+)	Positive Output Voltage
7	Trim	Output voltage trim. Leave TRIM pin open for nominal output voltage.