lanc2415rd3 Wall Industries,Inc., lanc2415rd3 Datasheet - Page 6

• Manufacturer Part Number: lanc2415rd3
• Description: Up To 3 Watts Dc/dc Converter Single And Dual Output
• Manufacturer: Wall Industries,Inc.

DESIGN & FEATURE CONSIDERATONS
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect
the stability of the power module. In applications where power is supplied over long lines and output loading is high, it may
be necessary to use a capacitor at the input to ensure startup. A capacitor mounted close to the power module helps ensure
stability of the unit, it is recommended to use a good quality low Equivalent Series Resistance (ESR < 1.0Ω at 100KHz)
capacitor of a 2.2µF for the 5V input models, a 1.0µF for the 12V input models, and a 0.47µF for the 24V and 48V input
models.
Maximum Capacitive Load
The LAN C Series has a limitation of maximum connected capacitance at the output. The power module may be operated in
current limiting mode during start-up, affecting the ramp-up and the startup time. For optimum performance we recommend
220µF maximum capacitive load for dual output models and 470µF capacitive load for single output models. The maximum
capacitance can be found in the Output Voltage / Current Rating Chart.
TEST CONFIGURATIONS
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100KHz) to simulate
source impedance.
Capacitor Cin offsets possible battery impedance.
Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0 ~ 500KHz.
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.33µF ceramic capacitor.
Scope measurement should be made by using a BNC socket; measurement bandwidth is 0 ~ 20MHz. Position the load
between 50mm and 75mm from the DC/DC Converter.
+Vin
-Vin
Single Output
Converter
DC / DC
+Out
-Out
Copper Strip
Cout
DC Power
Source
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
To Oscilloscope
+
603-778-2300 www.wallindustries.com Fax [phone]
Battery
Scope
+
-
Resistive
+
Cin
Load
+
Cin
Lin
+Vin
-Vin
Current
Probe
Rev H
Converter
DC / DC
+Vin
-Vin
Converter
+Vin
DC / DC
Dual Output
-Vin
Converter
DC / DC
+Out
-Out
+Out
-Out
+Out
Com.
-Out
Load
Load
Copper Strip
Cout
Cout
Single and Dual Output
Scope
Scope
DC/DC Converter
LAN C Series
Up to 3 Watts
Resistive
Load