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REC20-2412DZ Datasheet(PDF) 2 Page - Recom International Power

Part # REC20-2412DZ
Description  External ON/OFF control
Download  6 Pages
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Manufacturer  RECOM [Recom International Power]
Direct Link  http://www.recom-international.com
Logo RECOM - Recom International Power

REC20-2412DZ Datasheet(HTML) 2 Page - Recom International Power

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DC/DC Converter
ECO-2
REV.: 2/2017
www.recom-power.com
REC20-Z
Series
BASIC CHARACTERISTICS
Parameter
Condition
Min.
Typ.
Max.
Input Voltage Range
nom. Vin= 24V
nom. Vin= 48V
9VDC
18VDC
36VDC
75VDC
Start/up Time
10ms
Under Voltage Lockout
nom. Vin= 24V
DC-DC ON
DC-DC OFF
9VDC
7.5VDC
nom. Vin= 48V
DC-DC ON
DC-DC OFF
18VDC
16VDC
Output Voltage Trimming
see calculation below
±10%
Remote ON/OFF
DC-DC ON
DC-DC OFF
Open or 2.5V<Vr<12V
Short or 0V<Vr<1.2V
Operating Frequency
300kHz
Minimum Load
0%
Output Ripple and Noise (1)
100mVp-p
continued on next page
Specifications (measured @ ta= 25°C, nominal input voltage, full load and after warm up unless otherwise specified)
Notes:
Note1: Ripple and Noise is measured with a 20MHz bandwidth and a 0.1µF ceramic capacitor.
Output Voltage Trimming
Trim Calculation
Trim UP
Trim DOWN
Vref
+Vout
Trim
R1
Rup
R3
R2
Vref
-Vout
Trim
R1
Rdown
R3
R2
Vref
+Vout
Trim
R1
Rup
R3
R2
Vref
-Vout
Trim
R1
Rdown
R3
R2
Vout
3.4V
5.1V
12V
15V
R1
4.71 k
Ω
2.3 k
Ω
19.43 k
Ω 25.6 kΩ
R2
2.7 k
Ω
2.2 k
Ω
5.1 k
Ω
R3
15 k
Ω
9.1 k
Ω
36 k
Ω
Vref
1.24 V
2.5 V
Rup =
q a*R2 r-R3=kΩ
DVout = Output Voltage Trim
R2 - a
Rup
= trim up resistor
Rdown = trim down resistor
Rdown =
q b*R1 r- R3=kΩ
a
= trim up factor
R1 - b
b
= trim down factor
a =
q Vref r*R1=kΩ
DVout - Vref
b =
qDVout -Vrefr*R2=kΩ
Vref
Practical Example:
a =
q 2.5V r*2.3kΩ=1.849kΩ
5.61V - 2.5V
Rup =
q 1.849kΩ*2.2kΩ r-9.1= 3.411kΩ
2.2kΩ - 1.849kΩ
Trim Up:
Vout = 5.1V,
DVout = 10% (5.61V), Vref= 2.5V
Trim down:
Vout = 5.1V,
DVout = -10% (4.59V), Vref= 2.5V
b =
q4.59V -2.5Vr*2.2kΩ= 1.839kΩ
2.5V
Rdown =
q1.839kΩ*2.3kΩr- 9.1kΩ=0.075kΩ
2.3k
Ω - 1.839kΩ


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