Recom R-78AA12-0.5SMD - Audio/video converter

R-78AA12-0.5SMD - Audio/video converter Recom - Free user manual and instructions

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Product Type Non-Isolated DC/DC Converter (Buck)
Model R-78AA12-0.5SMD
Brand Recom
Output Voltage (Nominal) 12 VDC
Output Voltage Adjust Range 4.5 to 12.6 VDC
Output Current 0.5 A
Input Voltage Range 15 to 32 VDC
Efficiency (min/max) 94% / 97%
Switching Frequency 330 kHz typical
Output Ripple and Noise 30 mVp-p (9-15 Vout) / 40 mVp-p (1.5-6.5 Vout)
Line Regulation (9-15 Vout) ±0.1% typical, ±0.2% max
Load Regulation (9-15 Vout) ±0.25% typical, ±0.4% max
Transient Response (100%<->50% load) ±85 mV typical, ±100 mV max
Protections Continuous Short Circuit (automatic recovery), Thermal Shutdown
Remote On/Off Control Yes (CTRL pin)
Operating Temperature Range -40°C to +85°C (with derating)
Maximum Case Temperature +100°C
Dimensions (L x W x H) 15.3 x 9.6 x 8.8 mm
Weight 2.7 g typical
Package Type SMD (tube or tape & reel)
Certifications EN60950-1, IEC60950-1, EAC, RoHS2+
MTBF (+25°C) 21,098 to 29,253 x 10³ hours

Frequently Asked Questions - R-78AA12-0.5SMD Recom

What is the input voltage range for the R-78AA12-0.5SMD?
The input voltage range is 15 to 32 VDC for nominal 12V output. Ensure Vin is higher than Vout by at least the dropout voltage.
How do I adjust the output voltage?
The output voltage can be adjusted using an external resistor connected to the Vadj pin. See the datasheet for resistor values corresponding to the desired output voltage. The adjustable range is 4.5 to 12.6 VDC.
What is the maximum capacitive load?
With normal start-up, the maximum capacitive load is 470 µF. With a diode protection circuit and <1s start-up, it can be 6800 µF.
Does the converter have short circuit protection?
Yes, it has continuous short circuit protection with automatic recovery. The short circuit input current at 24V input is typically 60 mA.
Can I use this converter to generate a negative output voltage?
Yes, the R-78AA12-0.5SMD can be configured as a positive-to-negative converter. See the application circuit in the manual. For negative output, connect the output capacitors as shown and note that the maximum capacitive load is 220 µF.
How can I enable or disable the output remotely?
Use the CTRL pin. Apply a voltage between 2.8V and 5V (or leave open) to enable the output. Connect to GND or 0-0.8V to disable. The shutdown current is very low (20-30 µA).
Does the converter require a heatsink?
No, due to high efficiency (up to 97%), the power dissipation is low enough that no heatsink is needed. The maximum internal power dissipation is 0.4W.
What is the operating temperature range?
The operating temperature range is -40°C to +85°C with derating above 70°C. At 85°C, the output load must be reduced to 60%.
What certifications does the R-78AA12-0.5SMD have?
It is certified to EN60950-1 and IEC60950-1 (safety), EAC, and is RoHS 2+ compliant. EMC compliance with external filter meets EN55032 Class A and B.
What is the typical switching frequency?
The internal switching frequency is 330 kHz (280-380 kHz range). This helps keep output ripple low and allows small external components.

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Download the instructions for your Audio/video converter in PDF format for free! Find your manual R-78AA12-0.5SMD - Recom and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. R-78AA12-0.5SMD by Recom.

USER MANUAL R-78AA12-0.5SMD Recom

• Efficiency up to 95%, no need for heatsinks
• High reflow temperature SMD package
- Adjustable output voltage buck converter
• Wide input range (4.74V - 32V)
- Short circuit protection, thermal shutdown
- Remote on/off control
• Very low shutdown current
• Positive to negative converter

Switching Regulator

Description

The R-78AAxx-0.5SMD series are adjustable output non-isolated buck converters that meet the requirements for RoHS 10/10 as well as the reflow soldering temperatures associated with vapor phase soldering, making these high efficiency switching regulators ideally suited to modern pick-and-place mass production. The efficiency of up to 97% means that very little energy is wasted as heat. The additional features of remote on/off control, continuous short circuit protection and adjustable output voltages will find many uses in the battery-powered, industrial, medical and automotive markets.

Selection Guide
Part Input Output Vout Output Efficiency

NumberVoltage Range [VDC] (1)Voltage [VDC]Adjust Range [VDC]Current [A]@ min Vin [%]@ max. Vin [%]
R-78AA1.5-0.5SMD4.75 - 301.5fixed0.57363
R-78AA1.8-0.5SMD4.75 - 321.81.5 - 3.00.58271
R-78AA2.5-0.5SMD4.75 - 322.51.5 - 3.00.58777
R-78AA3.3-0.5SMD4.75 - 323.33.0 - 5.50.59181
R-78AA5.0-0.5SMD6.5 - 325.03.0 - 8.00.59486
R-78AA6.5-0.5SMD8.0 - 326.53.3 - 11.00.59588
R-78AA9.0-0.5SMD11 - 329.04.5 - 12.60.59692
R-78AA12-0.5SMD15 - 32124.5 - 12.60.59794
R-78AA15-0.5SMD18 - 3215fixed0.59795

Notes:

Note1: Input voltage ranges valid for nominal output voltages Vin must be higher than Vout including adjust range and dropout voltage

Model Numbering

R-78AA -0.5 SMD- nom. Output Voltage Output Current Packaging (2) Package

Notes:

Note2: add suffix -R for tape & reel packaging

Ordering Examples:

R-78AA5.0-0.5SMD-R = 5.0VDC Output Voltage, 0.5A, SMD, tape and reel packaging R-78AA2.5-0.5SMD = 2.5VDC Output Voltage, 0.5A, SMD, tube

RECOM

DC/DC Converter

R-78AA-0.5

0.5 Amp

SMD

Recom R-78AA12-0.5SMD - SMD - 1

Single Output

R-TRAA-GASMD SERIES (2)

Recom R-78AA12-0.5SMD - Single Output - 2

Recom R-78AA12-0.5SMD - Single Output - 3

Recom R-78AA12-0.5SMD - Single Output - 4

EN60950-1 certified IEC60950-1 certified

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

BASIC CHARACTERISTICS

Parameter Condition Min. Typ. Max.
Absolute Maximum Input Voltage 34VDC
Quiescent Current Vin= min. to max.5mA 7mA
Internal Power Dissipation0.4W
Output Voltage Adjustabilitysee calculation
Minimum Load (3)0%
Start-up time ON/OFF CTRL50ms
ON/OFF CTRLDC-DC ONDC-DC OFFOpen or 2.8VDC<Vr<5VDCGND or 0VDC<Vr<0.8VDC
Input Current of CTRL Pin DC-DC OFF1.8μA
Standby Current20μA 30μA
CTRL Thereshold Voltage2.4VDC 2.6VDC 2.8VDC
CTRL Voltage Hysteresse250mV
Internal Operating Frequency280kHz 330kHz 380kHz
Output Ripple and Noise 20MHz BW1.5VDC tp 6.5VDC9VDC to 15VDC20mVp-p30mVp-p30mVp-p40mVp-p
Maximum Capacitive Loadwith normal start-up time, no external components470μF
with <1 second start-up time + diode protection circuit6800μF

Notes:

Note3: Operation under no load will not harm the converter, but specifications may not be met. A minimum load of 6mA is recommended

Output Voltage Adjustability

Adjustment Resistor Values

continued on next page

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

Efficiency vs. Vin (full load)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 1

line | Input Voltage [VDC] | 15, 12Vout | 9Vout | 5Vout | 3.3Vout | 1.8Vout | 1.5Vout | | ------------------- | ---------- | ----- | ----- | ------- | ------- | ------- | | 4.75 | 95 | 90 | 90 | 90 | 80 | 70 | | 10 | 95 | 90 | 90 | 90 | 80 | 70 | | 15 | 95 | 90 | 90 | 90 | 80 | 70 | | 20 | 95 | 90 | 90 | 90 | 80 | 70 | | 25 | 95 | 90 | 90 | 90 | 80 | 70 | | 30 | 95 | 90 | 90 | 90 | 80 | 70 | | 34 | 95 | 90 | 90 | 90 | 80 | 70 |

Ripple vs. Vin (full load)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 2

Efficiency vs. Load (max. Vin)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 3

line | Output Load [%] | 15Vout | 12Vout | 5Vout | 3.3Vout | 1.8Vout | 1.5Vout | | --------------- | ------ | ------ | ----- | ------- | ------- | ------- | | 0 | 80 | 75 | 70 | 65 | 45 | 40 | | 10 | 85 | 78 | 72 | 68 | 48 | 42 | | 20 | 90 | 80 | 75 | 70 | 50 | 45 | | 30 | 92 | 82 | 77 | 72 | 52 | 48 | | 40 | 94 | 84 | 79 | 74 | 54 | 50 | | 50 | 95 | 86 | 81 | 76 | 56 | 52 | | 60 | 96 | 88 | 83 | 78 | 58 | 54 | | 70 | 97 | 90 | 85 | 80 | 60 | 56 | | 80 | 97 | 91 | 86 | 81 | 62 | 58 | | 90 | 97 | 92 | 87 | 82 | 64 | 60 | | 100 | 97 | 93 | 88 | 83 | 65 | 62 | | >100 | ~97 | ~94 | ~89 | ~84 | ~66 | ~63 | The chart includes a legend for each output load level. The y-axis represents Efficiency [%]. The x-axis represents Output Load [%]. The legend indicates six different output load categories: '15Vout', '12Vout', '5Vout', '3.3Vout', '1.8Vout', and '1.5Vout'. The data is plotted as a line graph with distinct colors for each output level. The chart is saved as an image file named 'efficiency' and is displayed on the screen.

Ripple vs. Load (max. Vin)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 4

line | Output Load [%] | 15Vout | 12Vout | 9Vout | 5Vout | 3.3Vout | 1.8Vout | 1.5Vout | | --------------- | ------ | ------ | ----- | ----- | ------- | ------- | ------- | | 100 | 24 | 26 | 20 | 18 | 15 | 10 | 5 | | 20 | 24 | 27 | 20 | 18 | 15 | 10 | 5 | | 30 | 24 | 28 | 20 | 18 | 15 | 10 | 5 | | 40 | 24 | 29 | 20 | 18 | 15 | 10 | 5 | | 50 | 24 | 30 | 20 | 18 | 15 | 10 | 5 | | 60 | 24 | 31 | 20 | 18 | 15 | 10 | 5 | | 70 | 24 | 32 | 20 | 18 | 15 | 10 | 5 | | 80 | 24 | 33 | 20 | 18 | 15 | 10 | 5 | | 90 | 24 | 34 | 20 | 18 | 15 | 10 | 5 | | 100 | 24 | 35 | 20 | 18 | 15 | 10 | 5 |

Efficiency vs. Load (min. Vin)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 5

line | Output Load [%] | 15,12Vout | 5Vout | 3.3Vout | 1.8Vout | 1.5Vout | | --------------- | --------- | ----- | ------- | ------- | ------- | | 0 | 95 | 94 | 93 | 86 | 82 | | 10 | 95 | 94 | 93 | 86 | 82 | | 20 | 95 | 94 | 93 | 86 | 82 | | 30 | 95 | 94 | 93 | 86 | 82 | | 40 | 95 | 94 | 93 | 86 | 82 | | 50 | 95 | 94 | 93 | 86 | 82 | | 60 | 95 | 94 | 93 | 86 | 82 | | 70 | 95 | 94 | 93 | 86 | 82 | | 80 | 95 | 94 | 93 | 86 | 82 | | 90 | 95 | 94 | 93 | 86 | 82 | | 100 | 95 | 94 | 93 | 86 | 82 | | >100 | ~94 | ~93 | ~92 | ~85 | ~75 | | >100 | ~94 | ~93 | ~92 | ~85 | ~75 | | >100 | ~94 | ~93 | ~92 | ~85 | ~75 | | >100 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >200 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >300 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >400 | ~94 | ~93 | ~92 | ~85 | ~75 | | >500 | ~94 | ~93 | ~92 | ~85 | ~75 | | >500 | ~94 | ~93 | ~92 | ~85 | ~75 | | >500 | ~94 | ~93 | ~92 | ~85 | ~75 | | >500 | | >500 | ~94 | ~93 | ~92 | ~85 | ~75 | | >600 | ~94 | ~93 | ~92 | ~85 | ~75 | | >600 | ~94 | ~93 | ~92 | ~85 | ~75 | | >600 | ~94 | ~93 | ~92 | ~85 | ~75 | | >600 | | >600 | ~94 | ~93 | ~92 | ~85 | ~75 | | >700 | ~94 | ~93 | ~92 | ~85 | ~75 | | >700 | ~94 | ~93 | ~92 | ~85 | ~75 | | >700 | ~94 | ~93 | ~92 | ~85 | ~75 | | >700 | | >700 | ~94 | ~93 | ~92 | ~85 | ~75 | | >800 | ~94 | ~93 | ~92 | ~85 | ~75 | | >800 | ~94 | ~93 | ~92 | ~85 | ~75 | | >800 | ~94 | ~93 | ~92 | ~85 | ~75 | | >800 | | >800 | ~94 | ~93 | ~92 | ~85 | ~75 | | >100 | <1 each> <1, the output load is equal at the end of the range of the output load. However, the output load values are not explicitly provided in the code.

Ripple vs. Load (min. Vin)
Recom R-78AA12-0.5SMD - Output Voltage Adjustability - 6

line | Output Load [%] | 15Vout | 12Vout | 5Vout | 3.3, 9Vout | 1.8Vout | 1.5Vout | | --------------- | ------ | ------ | ----- | ---------- | ------- | ------- | | 0 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 10 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 20 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 30 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 40 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 50 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 60 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 70 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 80 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 90 | 14.0 | 10.5 | 7.0 | 7.5 | 7.0 | 5.5 | | 100 | 18.0 | 14.0 | 8.0 | 10.0 | 11.0 | 6.0 |

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

REGULATIONS

ParameterConditionValue
Output Accuracyfull load±2.0% typ. / ±3.0% max.
Line Regulationlow line to high line at full load1.5 VDC tp 6.5VDC9VDC to 15VDC±0.2% typ. / ±0.4% max.±0.1% typ. / ±0.2% max.
Load Regulation10% to 100% load1.5 VDC tp 6.5VDC9VDC to 15VDC±0.7% typ. / ±1.0% max.±0.25% typ. / ±0.4% max.
Transient Responsewith a 100μF output capacitor100% <-> 50% load100% <-> 10% load±85mV typ. / ±100mV max.±100mV typ.

PROTECTIONS

Parameter Condition Value
Short Circuit Protection (SCP) continuous, automatic recovery
Short Circuit Input Current nom. Vin= 24VDC 60mA typ. / 100mA max.

Optional Diode Protection Circuit

Add a blocking diode to Vout if current can flow backwards into the output, as this can damage the converter when it is powered down.

The diode can either be fitted across the device if the source is low impedance or fitted in series with the output (recommended).

Optional Protection 1: Optional Protection 2:
+V_in +V_n R-78AAxx -0.5SMD CTRL GND +V_out CTRL GNDGND

+V_in +V_n R-78AAxx -0.5SMD CTRL GND V_out Output Voltage Adjustability up 1 diode drop CTRL D GNDGND

ENVIRONMENTAL

Parameter ConditionValue
Operating Temperature Range with derating (see graph) -40°C to +85°C
Maximum Case Temperature+100°C
Temperature Coefficient±0.015%/°C
Thermal Impedance0.1m/s, horizontal70°C/W
Operating Altitude2000m
Operating Humiditynon-condensing5% - 95% RH max.
Pollution DegreePD2
MTBFaccording to MIL-HDBK-217F, G.B.+25°C21098 - 29253 x 103hours
+71°C4214 - 7365 x 103hours

Derating Graph

Recom R-78AA12-0.5SMD - Optional Diode Protection Circuit - 3

line | Ambient Temperature [°C] | Output Load [%] | | ------------------------ | --------------- | | 70 | 100 | | 85 | 60 |

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

SAFETY AND CERTIFICATIONS

Certificate Type (Safety) Report / File Number Standard
Information Technology Equipment, General Requirements for Safety1603123IEC60950-1:2005, 2nd Edition + AM 2:2013EN60950-1:2006 + AM 2:2013
EAC RU-AT.49.09571 TP TC 004/2011
RoHS 2+ RoHS 2011/65/EU + AM2015/863
EMC Compliance Condition Standard / Criterion
Electromagnetic compatibility of multimedia equipment - Emission requirementswith external filter(see filter suggestion below)EN55032, Class A and B
ESD Electrostatic discharge immunity test Air ±8kV; Contact ±4kV EN61000-4-2
Radiated, radio-frequency, electromagnetic field immunity test 3V/m EN61000-4-3

EMC Filter Suggestion according to EN55032

+V_in L_1 R-78AAxx-0.5 +V_in +V_out GND C_1 C_2 GND

Component List Class A

MODELC1L1
R-78AA5.0-0.5SMD10μF100V MLCC3.9μH chokeRLS-397
R-78AA12-0.5SMD
R-78AA15-0.5SMD

Component List Class B

MODELC1C2L1
R-78AA5.0-0.5SMD10μF100V MLCC10μF100V MLCC5.6μH chokeRLS-567
R-78AA12-0.5SMD
R-78AA15-0.5SMD

Notes:

Note4: Filter suggestions are valid for indicated part numbers only. For other part numbers, please contact RECOM tech support for advice

DIMENSION AND PHYSICAL CHARACTERISTICS
Parameter TypeValue
MaterialcasePCBnon-conductive black plastic, (UL94 V-2)FR4, (UL94 V-1)
Dimension (LxWxH)15.3 x 9.6 x 8.8mm
Weight2.7g typ.
continued on next page

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

Dimension Drawing (mm)
15.3 9.68.812.35

15.0 0.50⁺⁰°⁰⁵

Recom R-78AA12-0.5SMD - Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) - 3

2.54 x 4 1 2 3 4 5 Bottom View 10 9 8 7 6 1.30 1.202.54

Recommended Footprint Details
10 9 8 7 6 Top View 1 2 3 4 5 1.80 13.00

Recom R-78AA12-0.5SMD - Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated) - 6

Pinning information

Pin # Single
1,2 +Vin
3,7,8,9 GND
4,5 +Vout
6 Vadj
10 CTRL

Tolerance:
xx.x=0.5mm
xx.xx=±0.25mm

INSTALLATION AND APPLICATION

Standard Application Circuit
+V_in +V_in R-78AAxx-0.5SMD C1 10µF (optional) CTRL CTRL GND GNDGND +V_out R_down C2 100µF (optional) R_up

To protect the converter from high inrush currents, use soft start Vin and C1 = 10μF Output capacitor C2 recommended if load is very dynamic

Positive to Negative Converter
GND +Vin C1 R-78Axx-0.5SMD CTRL -Vout -Vout On/Off (reference to Vout) GND Rdown C2 Rup -Vout

C1 and C2 are required and should be fitted close to the converter pins.
Maximum capacitiv load including C2 is 220μF

Pin Connections

Pin #NegativePositive
1,2+Vin+Vin
3,7,8,9-VoutGND
4,5GND+Vout
6-Vadj+Vadj
10CTRLCTRL

10 9 8 7 6 Top View 1 2 3 4 5 1.80 1.20 13.00

continued on next page

Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)

Selection Guide - Negative Output

Part Number\InputOutput Voltage Range [VDC]Output Voltage [VDC]Efficiency Voltage [A]External @ min Vin [%]Capacitor @ max. Vin [%]C1C2 (5)
R-78AA1.5-0.5SMD4.75 - 28-1.5-0.4686710μF/35V22μF/6.3V
R-78AA1.8-0.5SMD4.75 - 28-1.8-0.4717010μF/50V22μF/6.3V
R-78AA2.5-0.5SMD4.75 - 28-2.5-0.4757610μF/50V22μF/6.3V
R-78AA3.3-0.5SMD4.75 - 28-3.3-0.4778010μF/50V22μF/6.3V
R-78AA5.0-0.5SMD4.75 - 28-5.0-0.4798410μF/50V22μF/10V
R-78AA6.5-0.5SMD5.0 - 26-6.5-0.3818610μF/50V10μF/10V
R-78AA9.0-0.5SMD8.0 - 18-9.0-0.2878910μF/50V10μF/16V
R-78AA12-0.5SMD8.0 - 18-12-0.2879010μF/50V10μF/25V
R-78AA15-0.5SMD8.0 - 18-15-0.2879110μF/50V10μF/25V

Notes:

Note5: Maximum Capacitive Load including C2 is 220μF

PACKAGING INFORMATION

ParameterTypeValue
Packaging Dimension (LxWxH)tube530.0 x 17.0 x 13.0mm
tape and reel (carton)355.0 x 342.0 x 36.0mm
Packaging Quantitytube33pcs
tape and reel250pcs
Tape Width24mm
Storage Temperature Range-55°C to +125°C
Storage Humidity95% RH max.

The product information and specifications may be subject to changes even without prior written notice. The product has been designed for various applications; its suitability lies in the responsibility of each customer. The products are not authorized for use in safety-critical applications without RECOM's explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.

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Brand : Recom

Model : R-78AA12-0.5SMD

Category : Audio/video converter