Recom R-78AA9.0-0.5SMD Manual

Recom Audio/video konverter R-78AA9.0-0.5SMD

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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
• 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
+V
in
+V
out
R1
R2
R3
R
down
R
up
GND
Vref
GND
V
adj
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

Produkt Specifikationer

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Kategori: Audio/video konverter
Model: R-78AA9.0-0.5SMD

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