Recom R-78AA12-0.5SMD Bruksanvisning

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

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Side 1/7
www.recom-power.com REV.: 5/2019 I-1
Features
Switching
Regulator
• 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
R-78AA-0.5
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.
DC/DC Converter
0.5 Amp
SMD
Single Output
EN60950-1 certified
IEC60950-1 certified
Selection Guide
Part Input Output Vout Output Efficiency
Number Voltage Range Voltage Adjust Range Current @ min Vin @ max. Vin
[VDC] (1) [VDC] [VDC] [A] [%] [%]
R-78AA1.5-0.5SMD 4.75 - 30 1.5 fixed 0.5 73 63
R-78AA1.8-0.5SMD 4.75 - 32 1.8 1.5 - 3.0 0.5 82 71
R-78AA2.5-0.5SMD 4.75 - 32 2.5 1.5 - 3.0 0.5 87 77
R-78AA3.3-0.5SMD 4.75 - 32 3.3 3.0 - 5.5 0.5 91 81
R-78AA5.0-0.5SMD 6.5 - 32 5.0 3.0 - 8.0 0.5 94 86
R-78AA6.5-0.5SMD 8.0 - 32 6.5 3.3 - 11.0 0.5 95 88
R-78AA9.0-0.5SMD 11 - 32 9.0 4.5 - 12.6 0.5 96 92
R-78AA12-0.5SMD 15 - 32 12 4.5 - 12.6 0.5 97 94
R-78AA15-0.5SMD 18 - 32 15 fixed 0.5 97 95
Model Numbering
Notes:
Note2: add suffix -R for tape & reel packaging
Notes:
Note1: Input voltage ranges valid for nominal output voltages
Vin must be higher than Vout including adjust range and dropout voltage
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
nom. Output Voltage
Output Current
Packaging (2)
Package
R-78AA__-0.5 SMD-_
www.recom-power.com REV.: 5/2019 I-2
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78AA-0.5
Series
BASIC CHARACTERISTICS
Parameter Condition Min. Max.Typ.
Absolute Maximum Input Voltage 34VDC
Quiescent Current Vin= min. to max. 5mA 7mA
Internal Power Dissipation 0.4W
Output Voltage Adjustability see calculation
Minimum Load (3) 0%
Start-up time ON/OFF CTRL 50ms
ON/OFF CTRL DC-DC ON
DC-DC OFF
Open or 2.8VDC<Vr<5VDC
GND or 0VDC<Vr<0.8VDC
Input Current of CTRL Pin DC-DC OFF 1.8µA
Standby Current 20µA 30µA
CTRL Thereshold Voltage 2.4VDC 2.6VDC 2.8VDC
CTRL Voltage Hysterese 250mV
Internal Operating Frequency 280kHz 330kHz 380kHz
Output Ripple and Noise 20MHz BW 1.5VDC tp 6.5VDC
9VDC to 15VDC
20mVp-p
30mVp-p
30mVp-p
40mVp-p
Maximum Capacitive Load with normal start-up time, no external components 470µF
with <1 second start-up time + diode protection circuit 6800µF
continued on next page
Notes:
Note3: Operation under no load will not harm the converter, but specifications may not be met.
A minimum load of 6mA is recommended
+Vin +Vout
R1
R2 R3
Rdown
Rup
GND
Vref
GND
Vadj
Controlled IC
Adjustment Resistor Values
Output Voltage Adjustability
V0 R1 R2 R3 Vref(V)
1.8V 10kΩ Ω Ω21k 5.6k 1.23
2.5V 22kΩ Ω Ω21k 5.6k 1.23
3.3V 16.9kΩ Ω Ω10k 5.6k 1.23
5.0V 30.9kΩ Ω Ω10k 10k 1.23
6.5V 43kΩ Ω Ω10k 10k 1.23
9V 63.4kΩ Ω Ω10k 22.1k 1.23
12V 88.7kΩ Ω Ω10k 22.1k 1.23
Rdown = R2(R1 + R3) x (Vref - Vo) + Vref x R1R3
R2Vo - Vref (R1 + R2)
Rup = R2R3 (Vref - Vo) + Vref R1 (R2 + R3)
R2 (Vo - Vref) - Vref R1
www.recom-power.com REV.: 5/2019 I-3
DC/DC Converter
Specifications (measured @ Ta= 25°C, 10% minimum load, unless otherwise stated)
R-78AA-0.5
Series
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
15Vout
12Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90
100
25
20
15
10
5
0
Ripple [mV]
Output Load [%]
15Vout
12Vout
5Vout
3.3, 9Vout
1.8Vout
1.5Vout
100 20 30 40 50 60 70 80 90
100
40
30
20
50
45
35
25
15
10
5
0
Ripple [mV]
Output Load [%]
15Vout
12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
0 10 20 30 40 50 60 70 80 90 100
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Output Load [%]
15,12Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
Efficiency vs. Load (max. Vin)
Efficiency vs. Load (min. Vin)
Ripple vs. Load (max. Vin)
Ripple vs. Load (min. Vin)
4.75 10 15 20 25 30 34
100
80
60
40
90
70
50
30
20
10
0
Efficiency [%]
Input Voltage [VDC]
15, 12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
4.75 10 15 20 25 30 34
50
40
30
20
55
45
25
15
10
5
0
Efficiency [%]
Input Voltage [VDC]
15Vout
12Vout
9Vout
5Vout
3.3Vout
1.8Vout
1.5Vout
Efficiency vs. Vin (full load) Ripple vs. Vin (full load)

Produkspesifikasjoner

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Kategori: Audio/video-konverter
Modell: R-78AA12-0.5SMD

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