VPOL5A-5-SMT CUI Inc, VPOL5A-5-SMT Datasheet - Page 10

• 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
7.8 VPOL5A-5-SMT Series Output Voltage Adustment.
The output Voltage of the VPOL5A-5-SMTS33A can be adjusted in the
range 0.75V to 3.63V by connecting a single resistor on the
motherboard (shown as Rtrim) in Figure 12. When Trim resistor is not
connected the output voltage defaults to 0.75V
The value of Rtrim-up defined as:
Where: Rtrim-up is the external resistor in ohm,
To give an exa mple of the above calculation, to set a voltage of 3.3
Vdc, Rtrim is given by:
Rtrim = 3153 ohm
For various output values various resistors are calculated and provided
in Table 3 for co nvenience.
20050 SW 112
Vo is the desired output voltage
+Vin
Common
VPOL5A-5-SMT
Rtrim
Figure 12. Trim-up Voltage Setup
Rtrim
Table 3 – Trim Resistor Values
Vo,set (V)
th
Ave. Tualatin, Oregon 97062
=
=
0.75
1.20
1.50
1.80
2.00
2.50
3.30
3.63
(
(
Vo
Common
Vo
21070
21070
_
_
+Vo
Trim
. 0
. 0
75
75
Open
41.71
22.98
14.96
11.75
6.93
3.15
2.20
Rtrim (Kohm)
_
_
5110
5110
R trim-up
)
)
R-Load
phone
phone [phone] fax
DESCRIPTION: point of load converter
7.9 Output Ripple and Noise Measurement
The test set-up for noise and ripple measurements is shown in Figure
13. a coaxial cable with a 50ohm termination was used to prevent
impedance mismatch reflections disturbing the noise readings at higher
frequencies
7.10 Output Capacitance
V-Infinity’s VPOL5A-5-SMT series converters provide unconditional
stability with or without external capacitors. For good transient response
low ESR output capacitors should be located close to the point of load.
For high current applications point has already been made in layout
considerations for low resistance and low inductance tracks.
Output capacitors with its associated ESR values have an impact on
loop stability and bandwidth. V-Infinity’s converters are designed to
work with load capacitance up-to 3,000uF. It is reco mmended that any
additional capacitance, Maximum 3,000uF and low ESR, be connected
close to the point of load and outside the remote compensation point.
7.11 SMT Reflow Profile
An example of the SMT reflow profile is given in Figure 14.
Equipment used: SMD HOT AIR REFLOW HD-350SAR
Alloy : AMQ-M293TA or N C-SMQ92 IND-82088 SN63
Figure 13. Output Voltage Ripple and Noise Measurement Set-Up
240
200
160
120
80
40
+Vin
Common
0
VPOL5A-5-SMT
0
fax [phone]
30
Figure 14 SMT Reflow Profile
Common
60
+Vo
REFLOW PROFILE
TIME (SECONDS)
90
120 150 180 210 240
10uF
Tant.
www.v-infinity.com
Ceramic
1uF
rev.
page
date
Test Jack
R-Load
09/2010
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