dc-dc converter isolated power supply

Quick Detail

Place of Origin: China

Brand Name: Enargy

Model Number: JS150-24S12-POC

Output Power: 150W

Operating Temperature Range: -20～85℃

Input Voltage Range: 18-36Vdc

Output Voltage: 12Vdc

Efficiency: 88%

Size(L*W*H): 72.1*72.1*9.1mm

 

 

Payment & Shipping Terms

Minimum Order Quantity: 1pcs

Price: Negotiation

Delivery Time: Negotiation

Supply Ability: 1000Pcs/week

 

Key Features

· Output power: 150W

· Wide input range: 18-36Vdc

· High conversion efficiency: 88%

· Line regulation to ±0.5%

· Load regulation to ±0.5%

· Fixed operating frequency

· Isolation voltage :1500V

· Enable (ON/OFF) control

· Output over-load protection

· Hiccup mode short circuit protection

· Over-temperature protection

· Input under-voltage lock-out

· Output voltage trim: ±10%

 

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.

 

Product’s Introduction

The JS series is an independently regulated single output converter that uses the industry nonstandard brick package size. The very high efficiency is a result of ENARGY CORP patented topology that uses synchronous rectification and an innovative construction design to minimize heat dissipation and allow extremely high power densities. The power dissipated by the converter is so low that a heat sink is not required, which saves cost, weight, height, and application effort. All of the power and control components are mounted to the multi-layer PCB substrate with highyield surface mount technology, resulting in a more reliable product.

 

 

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

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.

 

 

1.1Absolute Maximum Ratings

Parameter	Min	Typ	Max	Units	Notes
Input Voltage			38	Vdc	Continuous, non-operating
			36	Vdc	Continuous, operating
			38	Vdc	Operating transient protection,<100mS
Isolation Voltage			2000	Vdc	Input to Output
Operating Temperature	-40		100	℃
Storage Temperature	-55		105	℃
Enable to Vin-Voltage	-2.0		10	Vdc

1.2Input Characteristics

Parameter	Min	Typ	Max	Units	Notes
Input Voltage Range	18	24	36	Vdc	Continuous
Under-Voltage Lockout		16.8	17.8	Vdc	Turn-on Threshold
	15.3	16.2		Vdc	Turn-off Threshold
Maximum Input Current			11	A	Full Load;18Vdc Input
Efficiency		88		%	Full load, rating input voltage, Figures 1-4
Dissipation		3		W	Min. Load
Disabled Input Current		10		mA	Enable pin low
Recommend External Input Capacitance		100		µF	Typical ESR 0.1-0.2Ω

1.3Output Characteristics

Parameter	Min	Typ	Max	Units	Notes
Output Voltage Set Point	11.88	12.00	12.12	Vdc	Nominal input; No load
Output Voltage Range	11.76	12.00	12.24	Vdc
Output Current Range	0.1		12.5	A	Subject to thermal derating; Figures 5-8
Line Regulation		±0.02	±0.50	%	Low line to high line; full load
Load Regulation		±0.02	±0.50	%	Min. load to full load; nominal input
Temperature Regulation		±0.03	±0.05	% / °C	Over operating temperature range
Current Limit	13.75	15	16.3	A	Output voltage 95% of nominal
Short Circuit Current	0.1	15	16.3	A	Output voltage <250 mV
Ripple (RMS)		20		mV	Nominal input; full load; 20 MHz bandwidth; Figure 13
Noise(Peak-to-Peak)		120		mV
Maximum Output Cap.		8000		μF	Nominal input; full load
Output Voltage Trim			±10	%	Nominal input; full load;

1.4Dynamic Response Characteristics

Parameter	Min	Typ	Max	Units	Notes
Change in Output Current (di/dt= 0.1A/µs)		360		mV	50% to 75% to 50% Iout max; Figure 11
Change in Output Current (di/dt= 2.5A/µs)		480		mV	50% to 75% to 50% Iout max; Figure 12
Settling Time		200		µS	To within 1% Vout nom.
Turn-on Time		10		mS	Full load; Vout=90% nom. Figure 9
Shut-down Fall Time		300		µS	Full load; Vout=10% nom. Figure 10
Output Voltage Overshoot			3	%

1.5Functional Characteristics

Parameter	Min	Typ	Max	Units	Notes
Switching Frequency	180	200	220	KHz	Regulation stage and Isolation stage
Trim(Pin8)					Voltage Trim(Pin8)
Output Voltage Trim			10	%	Trim Up, Trim Pin to Vout(-).
	10			%	Trim Down, Trim Pin to Vout(+).
Enable(ON/OFF)Control(Pin4)					See part 7.1
Enable Voltage Enable Source Current		5		Vdc	Enable pin floating
		1		mA
Enable (ON/OFF) Control Positive Logic	5		10	Vdc	ON-Control, Logic high or floating
	-0.5		2.0	Vdc	OFF-Control, Logic low
Over-Load Protection	110	120	130	%	Current-Mode, Pulse by Pulse Current Limit Threshold,(%Rated Load)
Short-Circuit Protection		80		mΩ	Type: Hiccup Mode, Non-Latching, Auto-Recovery,Threshold,Short-Circuit Resistance
Over-Temperature Protection		105		℃	Type: Non-Latching, Auto-Recovery；Threshold, PCB Temperature
		15		℃	Hysteresis

1.6Isolation 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 atmospheric pressure and R.H. is 90%
Isolation Capacitance		1000		pF

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

Parameter	Min	Typ	Max	Units	Notes
Weight		3.5(99)		Oz (g)	Open Frame
MTBF ( calculated )	1			MHrs	TR-NWT-000332; 80% load,300LFM, 40℃ Ta

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

Parameter	Min	Typ	Max	Units	Notes
Operating Temperature	-40		+100	℃	Extended, base PCB temperature
Storage Temperature	-55		+105	℃	Ambient
Temperature Coefficient			±0.05	%/℃
Humidity	20		95	%R.H.	Relative Humidity, Non - Condensing

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

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

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

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

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

 

 

 

 

 

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 ,40°C and55°C (nominal input voltage).

 

 

 

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

 

 

 

Figure 4: Power dissipation at nominal output voltage and 60% rated power vs. airflow rate for ambient air temperatures of 25°C, 40°C, and 55°C (nominal input voltage).

 

 

 

 

Figure 5: 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 5 (nominal input voltage).

 

 

 

Figure 6: Thermal plot of converter at full load current (150W) with 25°C air flowing at the rate of 100 LFM. Air is flowing across the converter from pin 1 to pin 5 (nominal input voltage).

 

 

 

 

Figure 7: Maximum output power-derating curves vs. ambient air temperature for airflow rates of 0 LFM through 400 LFM with air flowing from input to output (nominal input voltage).

 

 

 

 

 

Figure 8: Thermal plot of converter at full load current (150W) with 25°C air flowing at the rate of 100 LFM. Air is flowing across the converter from input to output (nominal input voltage)

 

 

 

 

 

Figure 9: Turn-on transient at full load (resistive load) (20 ms/div).Input voltage pre-applied.

Ch 1: Vout (5V/div).Ch 2: ON/OFF input(5V/div)

 

 

 

Figure 10: Shut-down fall time at full load (400 µs/div).

Ch 1: Vout (5V/div).Ch 2: ON/OFF input (5V/div).

 

 

 

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

 

 

 

 

Figure 12: Output voltage response to step-change in load current (50%-75%-50% of Iout(max): dI/dt = 2.5A/μs). Load cap: 470μF, 30 mΩ ESR tantalum capacitor and 1μF ceramic cap. Ch 1: Vout (100mV/div).

 

 

Figure 13: Output voltage ripple at nominal input voltage and rated load current (100mV/div). Load capacitance: 1μF ceramic capacitor and 10μF tantalum capacitor. Bandwidth: 20 MHz.

 

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

7.1Enable (ON/OFF) Control (Pin 4)

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.

 

 

7.2Protection 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.

7.3Typical Application Circuit

 

 

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

8.1Output 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 D. 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.

 

 

 

 

 

 

 

 

High Efficiency Railway Power Supply dc-dc converter module Isolation JS150-24S12-POC

9.1Mechanical Outline

 

 

 

 

 

Notes:

1. Pins 3 are 0.040” (1.02mm) dia.

2. All other pins are 0.060” (1.52mm) dia.

3. Tolerances: x.xx±0.02 in. (x.x±0.5mm)

                       x.xxx±0.010 in. (x.xx±0.25mm)

 

9.2Pin Designations　

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