pth12050 Astec Powe, pth12050 Datasheet - Page 3

• Manufacturer Part Number: pth12050
• Description: Pth05020 5vin Single
• Manufacturer: Astec Powe

2. System Interface Information
2.1 Input Capacitor
The recommended input capacitance is determined by 700mA rms
minimum ripple current rating and 1000µF
Ripple current and <100mΩ equivalent series resistance (ESR) values
are the major considerations, along with temperature, when
designing with different types of capacitors. Tantalum capacitors
have a recommended minimum voltage rating of 2 x (max. DC
voltage + AC ripple). This is necessary to insure reliability for input
voltage bus applications.
2.1.1 Ceramic Capacitors
Ceramic capacitors can be substituted for electrolytic types using
the minimum capacitance, for improved ripple reduction on the input
bus.
2.2 Output Capacitance (Optional)
The recommended ESR of the output capacitor is equal to or less
than 150mΩ. Electrolytic capacitors have marginal ripple
performance at frequencies greater than 400kHz but excellent low
frequency transient response. Above the ripple frequency, ceramic
capacitors are necessary to improve the transient response and
reduce any high frequency noise components apparent during higher
current excursions. Preferred low-ESR capacitor part numbers are
identified in Table 2.
(1) Total capacitance of 940µF is acceptable based on the combined
Panasonic
FC (Radial)
FK (SMT)
United Chemi-Con
LXZ Series
FX
PXA (SMT)
Nichicon
PM Series
NA
NX (SMT)
SANYO Os-con®:
SP
SVP (SMT)
AVX Tantalum
TPS (SMT)
Kemet Polymer
Tantalum
T520/T530 Series
(SMT)
Sprague Tantalum
595D Series
(SMT)
ripple current rating.
CAPACITOR
VENDOR/
SERIES
WORKING VALUE
VOLTAGE
6.3V
6.3V
6.3V
10V
10V
25V
10V
10V
10V
10V
10V
16V
10V
10V
10V
10V
10V
10V
10V
File Name: an_pth05020.pdf Rev (05): 21 Dec 2005
1000
1000
1000
1000
1000
1000
1000
(µF)
560
470
680
470
470
470
560
470
470
330
330
470
CAPACITOR CHARACTERISTICS
1
(ESR) EQUIVALENT
minimum capacitance.
Table 2 - Recommended Input/Output Capacitors
RESISTANCE
SERIES
0.090Ω
0.068Ω
0.060Ω
0.080Ω
0.020Ω
0.013Ω
0.090Ω
0.068Ω
0.020Ω
0.018Ω
0.065Ω
0.055Ω
0.015Ω
0.013Ω
0.045Ω
0.060Ω
0.040Ω
0.015Ω
0.100Ω
CURRENT (rms)
105ºC MAX
>4500mA
>5200mA
>3800mA
1050mA
1100mA
4130mA
4935mA
1050mA
4130mA
4400mA
1060mA
4400mA
1723mA
1826mA
1800mA
1440mA
RIPPLE
755mA
850mA
760mA
2.2.1 Tantalum Capacitors
Tantalum type capacitors can be used for the output but only the
AVX TPS, Sprague 593D/594/595 or Kemet T495/T510 series. These
capacitors are recommended over many other tantalum types due to
their higher rated surge, power dissipation, and ripple current
capability. As a caution, the TAJ series by AVX is not recommended.
This series has considerably higher ESR, reduced power dissipation,
and lower ripple current capability. The TAJ series is also less reliable
than the AVX TPS series when determining power dissipation
capability. Tantalum or Oscon® types are recommended for
applications where ambient temperatures fall below 0ºC.
2.2.2 Capacitor Table
Table 2 identifies the characteristics of capacitors from a number of
vendors with acceptable ESR and ripple current (rms) ratings. The
number of capacitors required at both the input and output buses is
identified for each capacitor type.
This is not an extensive capacitor list. Capacitors from other vendors
are available with comparable specifications. Those listed are for
guidance. The RMS ripple current rating and ESR (at 100kHz) are
critical parameters necessary to insure both optimum regulator per-
formance and long-term reliability.
Application Note 156
www.artesyn.com
12.5 x 13.5
PHYSICAL
SIZE (mm)
10 x 12.5
10 x 10.2
10 x 10.5
10 x 12.5
10 x 10.5
11 x 12.7
7.3 x 5.7
7.3 x 5.7
4.3 x 7.3
4.3 x 7.3
10 x 7.7
10 x 16
10 x 16
16 x 15
10 x 10
(L X W)
7.2 x 6
10 x 8
10 x 8
INPUT
BUS
2 (1)
2 (1)
2 (1)
2 (1)
2 (1)
2 (1)
2 (1)
1
1
1
1
2
1
2
1
1
2
3
3
QUANTITY
OPTIONAL
OUTPUT
BUS
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
LXZ10VB681M10X12LL
LXZ10VB102M10X16LL
PXA6.3VC471MJ80TP
PNX0J471MCAR1GS
TPSE477M010R0045
TPSV477M010R0060
595D477X0010R2T
T520X337M010AS
T530X337M010AS
UPM1C102MHH6
UPM1A102MPH6
EEVFK1E102Q
EEVFK1A102P
PNA1A471M1
EEUFC1A561
EEUFC1A102
10SVP560M
10SP470M
6FX1000M
NUMBER
VENDOR
PART
3