VPOL5A-5-SMT CUI Inc, VPOL5A-5-SMT Datasheet - Page 9

• Manufacturer Part Number: VPOL5A-5-SMT
• Description: CONVERTER DC/DC 3.63V OUT 5A SMD
• Manufacturer: CUI Inc
• Series: V-Infinity VPOL5Ar
• Type: Point of Load (POL) Non-Isolatedr

Specifications of VPOL5A-5-SMT

• Output: 0.75 ~ 3.63V
• Number Of Outputs: 1
• Power (watts): 18W
• Mounting Type: Surface Mount
• Voltage - Input: 3 ~ 5.5V
• Package / Case: 5-DIP SMD Module
• 1st Output: 0.75 ~ 3.63 VDC @ 5A
• Size / Dimension: 0.80" L x 0.45" W x 0.24" H (20.3mm x 11.4mm x 6.1mm)
• Power (watts) - Rated: 18W
• Operating Temperature: -40°C ~ 85°C
• Efficiency: 94%
• Approvals: EN, IEC, UL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 3rd Output: -
• 2nd Output: -
• Other names: 102-1288-2

PART NUMBER: VPOL5A-5-SMT
20050 SW 112
7.6 Input Capacitance at the Power Module
The SMTconvert ers must be connected to a low AC source
impedance. To a void problems with loop stability source inductance
should be low. Also, the input capacitors should be placed close to the
converter input pins to de-couple distribution inductance. However, the
external input capacitors are chosen for suitable ripple handling
capability. Low ESR polymers are a good choice. They have high
capacitance, high ripple rating and low ESR (typical <100mohm).
Electrolytic capacitors should be avoided. Circuit as shown in Figure 10
represents typical measurement methods for ripple current. Input
reflected-ripple current is measured with a simulated source Inductance
of 1uH. Current is measured at the input of the module.
7.7 Test Set-Up
The basic test set-up to measure parameters such as efficiency and
load regulation is shown in Figure 11. Things to not e are that this
converter is non-isolated, as such the input and output share a common
ground. These grounds should be connected together via low
impedance ground plane in the application circuit. When testing a
converter on a bench set-up, ensure that -V
together via a low impedance short to ensure proper efficiency and load
regulation measurements are being made. When testing the V-Infinity’s
VPOL5A-5-SMT series under any transient conditions please ensure
that the transient response of the source is sufficient to power the
equipment under test. We can calculate the
The value of efficiency is defined as:
Where: Vo is output voltage,
The value of load regulation is defined as:
Power
Supply
ç
Load
Efficiency
Load regulation and line regulation.
=
To Oscilloscope
Vin
Vo
Figure 10. Input Reflected-Ripple Test Setup
Vin is input voltage,
Iin is input current.
.
Io is output current,
reg
+
x
x
Io
Iin
=
V
th
x
FL
220uF
ESR<0.1ohm
100
V
Ave. Tualatin, Oregon 97062
_
NL
L1
1uH
V
%
NL
=
Tantalum
2*100uF
100
%
in
and -V
o
+Vin
Common
VPOL5A-5-SMT
are connected
phone
phone [phone] fax
DESCRIPTION: point of load converter
The value of line regulation is defined as:
Where: V
Power
Supply
V
+
LL
HL
Current Meter
V
Figure 11. VPOL5A-5-SMT Test Setup
NL
is the output voltage of minimum input voltage at full load.
Voltage Meter
is the output voltage of maximum input voltage at full load.
A
is the output voltage at no load
fax [phone]
Line
V
.
reg
100uF
=
V
HL
V
+Vin
Common
_
LL
VPOL5A-5-SMT
V
LL
www.v-infinity.com
x
Common
100
+Sense
+Vo
rev.
page
date
%
V
09/2010
9 of 11
A
Load