F4810-S-RG - Power-One - Product.Network

REV. May 26, 2005 Page 1 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

F4810 (on left) and F2410 Input Filters

Applications

Differential and Common Mode filtering for DC-DC

converters with 48 V and 24 V input:

• Telecommunications

• Data communications

• Distributed Power Solutions

Features

• Maximum current 10A with no derating

• Maximum operating input voltage 80V

(45V for F2410 version)

• 100V/50V 100ms transient withstand capability

• Differential LC-filter stage

• Surface mounted design

• Small footprint – less than 1 sq. in.

• Low profile: 0.378” [9.6 mm] maximum

• Low weight: 0.34 oz [9.5 g]

• Operation over -40°C to 85°C ambient temperature

range

• No airflow required up to 85°C

• Enables Q

&& ™ Family converter compliance with

EN55022 and FCC Class B requirements conducted

emissions

• UL 60950 recognition in U.S. & Canada, and

DEMKO certification per IEC/EN 60950

• RoHS compliant (Q4 2005)

Description

The F4810 and F2410 Input Filters minimize the conducted and radiated emissions generated by switch mode

DC-DC converters, and allow board designs utilizing Q

&& ™ Family converters to meet stringent FCC and EN55022

Class B conducted emissions requirements.

Using these filters as the primary power-conditioning device in front of any of the Q

&& ™ Family converters will

provide a “worry-free” EMI design. Unlike most available off-the-shelf filter modules, the F4810 and F2410, in

addition to common mode noise reduction components, are provisioned with a differential LC-filter stage, which

virtually guarantees compliance with conducted noise standards across the frequency range from 150 kHz to 30

MHz, including fundamental switching frequency and its harmonics. Test results show headroom of 15-20 dB for

conducted noise quasi-peak levels, in relation to Class B requirements.

F4810/F2410 filters are designed specifically for distributed power solutions in conjunction with Q

&& ™ Family DC-

DC converters. Low profile and small size (less than 1 sq. in.) in a surface mount package helps the designer save

system board real estate, and simplifies the layout.

A single filter can be used with multiple converters, and is capable of providing up to 10A to the converter input

bus at 85°C. When used as specified within this datasheet, these filters do not require airflow and/or derating at

high temperatures.

REV. May 26, 2005 Page 2 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

Electrical Specifications

Conditions: TA=25ºC, No Airflow, Vin=48 Vdc, unless otherwise specified.

Parameter Notes Min Typ Max Units

Absolute Maximum Ratings

Input Voltage (F4810) Continuous 0 100 Vdc

(F2410) Continuous 0 50 Vdc

Operating Ambient Temperature -40 85 °C

Storage Temperature -55 125 °C

Electrical Characteristics

Operating Input Voltage Range (F4810) 0 48 80 Vdc

(F2410) 0 24 45 Vdc

Maximum Operating Current 85°C ambient, no airflow 10 Adc

DC Resistance (total for two legs) 0.016 Ω

Filter differential inductance 4.5 µH

Filter common mode inductance For frequencies below 10MHz 6.5 µH

Differential mode Attenuation at 400 kHz1 F4810 57 dB

F2410 63 dB

Differential mode attenuation at 30mHz1 F4810 56 dB

F2410 57 dB

Common mode Attenuation at 400 kHz2 F4810, F2410 24 dB

Common mode Attenuation at 30 mHz2 F4810, F2410 50 dB

Efficiency at Maximum Load Vin = 48V @ 10A 99.6 99.7 %

Additional Notes:

1. 50 Ω source and 50 Ω load impedance. See Fig 2 and 3 for differential mode attenuation in 20kHz-100MHz frequency range.

2. 50 Ω source and 50 Ω load impedance; external common-mode capacitors 0.1uF (from IN+ and IN- to the common chassis). See Fig. 4 for

attenuation in 20kHz-100MHz frequency range.

REV. May 26, 2005 Page 3 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

The F4810 and F2410 filters contain input and output

capacitors, plus differential and common mode

inductors. Shown in Fig. 1, the schematic diagrams

of both filters are similar, the only difference are

changes in C1, C2 capacitor values. The separate

differential inductor, L2, allows a 50 Ω differential

attenuation of 60 dB across the stated frequency

range, a value substantially higher in comparison

with other available off-the-shelf filters (typically 25-

30 dB).

The F4810 can be used in 24V or 48V systems

without any limitations; however, in 24V systems the

F2410 differential attenuation is better. At low

frequencies around 100-200 kHz the difference is

20dB, but at high frequencies the plots are close to

identical.

Absolute maximum voltage and maximum operating

voltage in Electrical Specifications Table are for the

filter itself; check maximum rating for corresponding

DC-DC converters. Filter will not be damaged by

reversed input voltage, or by applying voltage to the

output pins.

L1-1 VOUT+

VOUT-

L1-2

4.2 µH

VIN-

VIN+

49.9

4 µF3 µF

Fig. 1: Schematic diagram for F4810, F2410. Capacitor

values shown are for F4810; for F2410 C1=10µF; C2=13µF.

Fig. 2: F4810 - Differential mode attenuation, 0.2-100MHz.

Source and load resistances are 50 Ω. Vertical scale:

10dB/div, with zero level marked by arrow. No load, 25ºC.

Fig. 3: F2410 - Differential mode attenuation, 0.2-100MHz.

Source and load resistance 50 Ω. Vertical scale: 10dB/div,

with zero level marked by arrow. No load, 25ºC.

Differential attenuation plots for the F4810 and F2410

filters in the extended frequency range of 20 kHz-100

MHz are shown in Fig. 2 and Fig. 3, respectively, and

can be seen to be flat (around 55-60 dB) from 0.35

MHz to 40 MHz.

Fig. 4 shows Common mode attenuation with 50 Ω

source and load. The attenuation is the same for both

filters, and depends on the value of external Y-

capacitors, connected between input pins and frame or

a reference ground.

Fig. 4: F4810/F2410 - Common Mode attenuation,

0.2-100MHz. Source and load resistances are 50 Ω. Two

0.1uF Y-caps to common line. Vertical scale: 10dB/div, with

zero dB level marked by arrow.

REV. May 26, 2005 Page 4 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

Thermal Considerations

Because of low series internal DC resistance, the

F4810/F2410 filters generally do not require airflow

and/or derating to ambient temperatures up to 85˚C,

if placed and interconnected as described below.

Good thermal design is consistent with appropriate

placement to gain additional heat exchange through

the I/O pins to the system board. For high

temperature operation in low airflow environments,

use of 1-2 oz copper for the external connection pads

and provision for some extra copper at all four I/O

pins is encouraged. Thermal Derating data shown

were taken on special thermal board with each input

and output pin connected to 0.5 sq. in pad of 2 oz

copper.

To check filter thermal characteristic in an actual

system environment, attach a thermocouple to the

top of differential inductor, L2; it is the INDUCTOR

closest to OUT+ pin.

The maximum temperature at this test point should

not exceed 120˚C, and a minimum of 5-10˚C

headroom is suggested for better reliability.

A typical application schematic is shown in Fig. 5. Either

filter can be used to power one or more converters.

Maximum filter output current should be limited 10A - or

less - depending upon system thermal environment.

The required filter current drawn by the converter loads,

IREQ’d(Filter), will be the sum of the loads of all connected

converters:

IREQ’d(filter) = Σ[Pi,OUT/(VIN, min * ηi, min)] [A]

where:

IREQ’d(filter) maximum required filter current

Pi,OUT(converter) converter output power, i=1, 2…

= Vi,OUT(converter) * Ii,OUT(converter)

VIN, min converter input voltage

ηi, min converter minimum efficiency, i=1,

2,…

For applications requiring a filter current greater than

10A, divide the converters into smaller groups and use

multiple filters. Do not connect filters in parallel.

Fig. 5: F4810 – Typical application

Rload2

Vin (+)

Vin (-)

ON/OFF

Vout (+)

Vout (-)

TRIM

SENSE (+)

SENSE (-)

(Top View)

Converter

QmaXTM Series

F4810

IN -

IN +

+48V

-48V

+Vout

-Vout

12A

Rload1

Vin (+)

Vin (-)

ON/OFF

Vout (+)

Vout (-)

TRIM

SENSE (+)

SENSE (-)

(Top View)

Converter

QmaXTM Series

(Top View)

Input Filter

For further information

regarding connection

of CM capacitors and

other pertinent layout

and EMC information,

please refer to

Application notes 100

and 101.

REV. May 26, 2005 Page 5 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

For additional information regarding layout and

EMC, refer to Application notes 100 and 101.

The following bulleted items are considerations

regarding the external components for the

typical application shown in Fig. 5.

• Input electrolytic capacitor C1. We recommend 1-

2 µF/W for 48V applications, and 2-4 µF/W for

24V applications. This capacitor is needed to

ensure stability of converters in presence of their

negative input impedance characteristic. Note that

electrolytic capacitors at –40ºC have 3-5 times

less capacitance than at room temperature, and

therefore it is good practice to check the power

system at worst case conditions from this point of

view, i.e. lowest ambient temperature, minimum

input voltage, and maximum load. If electrolytic

capacitors are restricted for use in the system,

please contact the factory.

• Input capacitors C2, C3 are optional; they

decrease input ripple current and improve EMI.

One or two of the following ceramic chip

capacitors, as required, per converter are

recommended:

– TDK C4532X7R2A105, 1.0 µF, 100V - for 48V

applications

– TDK C4532X7R1H475, 4.7 µF, 50V - for 24V

applications

• Common-mode capacitor (Y-cap) values and

their EMI attenuation effects depend on system

grounding and layout (they are not shown on Fig.

5). In EMI testing with the filter, ceramic

capacitors between input and output of the

converter (C4 – C7) were very helpful. Typical

values for the capacitor between Vin- and Vout-

are 3,300pF – 5,100pF, and for the capacitor

between Vin+ and Vout+, 0 to 3,300pF.

If connection of capacitors between input and

output is prohibited because of system

restrictions, connect Y-capacitors only from each

input pin to system ground. The value of these

capacitors in this case is “the bigger the better”

(preferably 0.1µF or larger). Voltage rating of Y-

capacitors depends on the system isolation and

safety requirements.

• Output capacitors C8, C9 are optional to reduce

output ripple. Addition of one-two 47µF ceramic

capacitors, for example, for low voltage

applications 3.3V and below, significantly

decreases output ripple from 25-40mV peak-to-

peak to 5-10mV. Recommended capacitor for

these low voltage applications is

C3225X5ROJ476 from TDK.

• UL testing was performed with a 12A fuse

(R451012 from Littelfuse). Fuses larger than 12A

should not be used. Smaller value fuses can be

used as required for protection to a lower power

limit.

REV. May 26, 2005 Page 6 of 6 www.power-one.com

F4810/F2410 Input EMI Filter Data Sheet

80Vdc @ 10A / 45Vdc @ 10A Output

di/dt

Physical Information

TOP VIEW

-IN

SIDE VIEW

+IN

-OUT

+OUT

Filter Part Numbering Ordering Information

Product

Series

Input

Voltage

Rated Load

Current Connector Finish Tape and Reel Environmental

F 24 10 - S R

Filter Module

48: ≤ 80 V

24: ≤ 45 V

10A

No letter ⇒ Gold Plated

S ⇒ Tin/Lead Plated

No letter ⇒ Bulk

R ⇒ Tape and

Reel

G ⇒ Green/RoHS

Compliant

Not populated ⇒ Non-RoHS

Compliant

The example above describes P/N F2410-SR: 0-45 V input, 10 A output current, Tin/Lead plated connector, tape and reel.

Please consult factory regarding availability of a specific (including RoHS compliant) version.

NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not designed, intended for use in, or authorized for use as critical

components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written

consent of the respective divisional president of Power-One, Inc.

TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on

the date manufactured. Specifications are subject to change without notice.

Pad/Pin Connections

Pad/Pin # Function

+IN Vin (+)

-IN Vin (-)

-OUT Vout (-)

+OUT Vout (+)

• All dimensions are in inches [mm]

• Connector Material: Copper

• Connector Finish: Gold over Nickel

Optional: Tin/Lead over Nickel

• Converter Weight: 0.34 oz [9.5 g]

• Recommended Surface-Mount Pads:

Min. 0.080” x 0.112” [2.03 x 2.84]