18‐36 V input voltage dc dc converter 50 Watt Output 8V XD50-24S8-PEC

DC-DC Converters 50W Output 8V XD50-24S8-PEC

 

 

Features:

Wide input range: 18‐36 V

Output power: 50W

High conversion efficiency: 89%

Line regulation to:±1%

Load regulation to:±1%

Input under‐voltage lock‐out

Output voltage trim±‐8～+10% Vout

Output over‐current protection

Hiccup mode short circuit protection

Output over‐voltage protection

Enable (On/Off) Control

Isolation Voltage(Input to output): 1500Vdc

 

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 Active Clamp switching provides high power

density with low noise and high efficiency.

 

1. Electric Characteristics

1.1 Absolute Maximum Ratings

Parameter	Min	Typ	Max	Units	Notes
Input Voltage			40	Vdc	Continuous, non-operating
			36	Vdc	Continuous, operating
			40	Vdc	Impulse voltage,<100ms,operating
Isolation voltage			2000	Vdc	Input to output
Operating Temperature	-40		100	℃	In view of PCB Temperature
Storage Temperature	-55		105	℃
Enable to -Vin Voltage	-2		10	Vdc

 

1.2 Input Characteristics

Parameter	Min	Typ	Max	Units	Notes
Operating input voltage range	18	24	36	Vdc
Input Under-Voltage Lockout	17.0	17.5	17.9	Vdc	Recovery point
	16	16.5	17.0	Vdc	Protect point
Maximum Input Current			3.4	A	Vin min,output full load
Efficiency		88		%	Rated input;rated load
Dissipation,Standby		5		W	No load

 

1.3 Output Characteristics

Parameter	Min	Typ	Max	Units	Notes
Output Voltage Set point	7.92	8.00	8.08	Vdc	Rated input voltage, load
Output Voltage Range	7.84	8.00	8.16	Vdc
Output Current Range	0.1		6.3	A
Voltage Regulation		±0.2	±1	%
Load Regulation		±0.2	±1	%
Output over-current protection		8		A	90% of the rated output voltage
Output Short Circui Current		10	20	A
RMS		15		mV	Nominal input; full load; 20MHz,bandwidth
peak-to-peak		75		mV
Capacitive load from themachine			4000	μF

 

1.4 Dynamic Response Characteristics

Parameter	Min	Typ	Max	Units	Notes
Change in Output Current		400		mV	Load change50%～75%～50% Iout max,di/dt= 0.1A/μS
		400		mV	Load change50%～75%～50% Iout max,di/dt= 2.5A/μS
Dynamic recovery time			300	uS
Turn-on Time		5		mS	Starting from vin to vout rise to 90%
Turn-off overshoot			5	%

 

1.5  Functional Characteristics

Parameter	Min	Typ	Max	Units	Notes
Switching Frequency	180	200	230	KHz
Output Trim			10	% Vout	Trim Up
			8		Trim Down
Enable Current			1	mA
Enable (ON/OFF)	1		15	Vdc	ON-control, Logic high or floating
	-0.5		0.3	Vdc	OFF-control, Logic low
Over-Voltage Protection	110		130	%	Load
Over-Load Protection	110			%	Current mode,Pulse current(100% rared load)
Short-Circuit Protection			65	mΩ	Hiccup mode,since the recovery

 

1.6 Isolation Characteristics

Parameter	Min	Typ	Max	Units	Notes
Isolation Voltage	1500			Vdc	Input to Output
	1500			Vdc	In to base
	500			Vdc	Out to base
Isolation Resistance	100			MΩ	At 500VDC to test it when atmospheric pressure and R.H. is 90%
Isolation Capacitance		1000		pF

 

2.General Characteristics

Parameter	Min	Typ	Max	Units	Notes
Weight		25		g
MTBF	1			MHrs	TR-NWT-000332; 80% load,300LFM, 40℃ Ta

 

3.Environmental Characteristics

Parameter	Min	Typ	Max	Units	Notes
Operating Temperature	-40		100	℃	Extended, base PCB temperature
Storage Temperature	-55		105	℃	Ambient
Temperature Coefficient			±0.02	%/℃
Humidity	20		95	%R.H.

 

4.Standards Compliance

Parameter	Notes
MIL-STD-704
MIL-STD-1399
MIL-STD-810
UL/cUL60950
EN60950
GB4943
IEC 61000-4-2

 

 

5. WORK WAVE

 

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

Figure 2: Efficiency at nominal output voltage and
60% rated power vs. airflow rate for ambient air
temperatures of 25°C.

 

Figure 3: Maximum output power derating curves vs.
ambient air temperature for airflow rates of 0 LFM
through 400 LFM with air flowing from pin 1 to pin 3
(nominal input voltage).

Figure 4: Output voltage ripple at nominal input voltage
and rated load current . Load capacitance: 0.1μF ceramic
capacitor and 10μF tantalum capacitor. Bandwidth: 20
MHz.

 

Figure 5: Thermal plot of converter at full load
current(50W) with 25°C air flowing at the rate of
200 LFM. Air is flowing across the converter from
pin 1 to pin 3(nominal input voltage).

Figure 6: Thermal plot of converter at full load
current(50W) with 25°C air flowing at the rate of
200 LFM. Air is flowing across the converter from
input to output (nominal input voltage).

 

Figure 7: Turn-on transient at full load (resistive load)
(10ms/div).Input voltage pre-applied.
Ch1:Vout (5V/div)
Ch2:ON/OFF Input (500mV/div)

Figure 8: Shut-down fall time at full load (10 ms/div).
Ch1:Vout (5V/div)
Ch2:ON/OFF Input (500mV/div)

 

Figure 9: Output voltage response to step-change in
load current (50%-75%-50% of Iout(max); dI/dt =
0.1A/μs). Load cap: 10μF, 100mΩ ESR tantalum
capacitor and 0.1μF ceramic capacitor.
Ch1: Vout (200mV/div)

Figure 10: Output voltage response to step-change in load
current (50%-75%-50% of Iout(max): dI/dt =2.5A/μs).
Load cap: 10μF, 30 mΩ ESR tantalum capacitor and 0.1μF
ceramic cap. Ch1: Vout (200mV/div)

 

6.Physical Information
6.1Mechanical Outline

 

Notes:
1. All pins are 1.02mm dia..
2.Tolerances: x.x ±0.5mm, x.xx ±0.25mm

 

6.2 Pin Designations

Pin No.	Name	Function
1	Enable	TTL input to turn converter on and off, referenced to Vin(-), with internal pull up.
2	Vin(-)	Negative input voltage
3	Vin(+)	Positive input voltage
4	Vout(+)	Positive output voltage
5	Com	Ground
6	Trim	Negative output voltage