F4810-S-R - Power-One - Datasheet.Live

F4810/F2410 Input EMI Filter Preliminary Data Sheet

80V@10A/50V@10A

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 1 of 6

The F4810 and F2410 Input Filters minimize the conducted

and radiated emissions generated by switchmode DC/DC

converters, and allow board designs utilizing di/dt power

converters to meet stringent FCC and EN55022 Class B

conducted emissi ons 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 compli-

ance 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 lev-

els, in relation to Class B requirements.

F4810/F2410 filters are designed specifically for distributed

power solutions in conjunction with Q

&& Family DC/DC con-

verters. 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 tempera-

tures.

Applications

Differential and Common Mode filtering for DC/DC convert-

ers with 48 V and 24 V input:

• Telecommunications

• Data communications

• Distributed Power Solutions

F4810 (on left) and F2410 Input Filters

Features

• Maximum current 10 A 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 con-

ducted emissions

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

DEMKO certification per IEC/EN 60950 (pending)

F4810/F2410 Input EMI-Filter 10 A Output Preliminary Data Sheet

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 2 of 6

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

(F2810) 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.

Description

The F4810 and F2410 filters contain input and output ca-

pacitors, 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 diffe rential

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 volt-

age in Electrical Specifications Table are for the filter itself;

check maximum rating for corresponding DC/DC convert-

ers. 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 fo r F4810, F24 10. Capacito r

values shown are for F4810; for F2410 C1=10 µF;

C2=13 µF.

F4810/F2410 Input EMI-Filter 10 A Output Preliminary Data Sheet

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 3 of 6

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

Source and load resistanc es are 50 Ω. Vertical scale:

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

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 fram e or a reference ground.

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

All filter attenuation measurements shown are made with

standard 50 Ω source and load resistances. Due to system

impedances, differences in actual system attenuation val-

ues for the filter/system can be significant after integration

into the user application. Therefore, the listed values

should be used only for compari so n of different filters.

Fig. 4: F4810/F2410 - Common Mode attenuation, 0.2-

100MHz. Source and lo ad resistances are 50 Ω. Two

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

with zero dB level marked by arrow .

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 describe d below.

Good thermal design is consistent with appropriate place-

ment 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 differen-

tial 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.

F4810/F2410 Input EMI-Filter 10 A Output Preliminary Data Sheet

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 4 of 6

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 - depend-

ing upon system thermal environm ent.

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

For additional information regarding layout and EMC,

refer to di/dt Application notes AN100 and AN101.

The following bulleted items are considerations regard-

ing 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 character-

istic. 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

Rload2

Vin (+)

Vin (-)

ON/OFF

Vout (+)

Vout (-)

TRIM

SENSE (+)

SENSE (-)

(Top View)

Converter

QmaXTM Series

C1 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 d i/dt

Application notes

AN100 and AN101.

F4810/F2410 Input EMI-Filter 10 A Output Preliminary Data Sheet

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 5 of 6

ambient temperature, minimum input voltage, and maxi-

mum load. If electrolytic capacitors are restricted for use

in the system, please contact the facto r y.

• Input capacitors C2, C3 are optional; they decrease input

ripple current and improve EMI. One or two of the follow-

ing ceramic chip capacitors, as required, per converter

are recommended:

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

tions

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

tions

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

attenuation effects depend on system grounding and lay-

out (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 C3225X5RO J47 6 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 pro-

tection to a lower power limit.

Physical Information

TOP VIEW

-IN

SIDE VIEW

+IN

-OUT

+OUT

Pin Connections

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 o ver Nickel

• Converter Weight: 0.34 oz [9.5 g]

• Recommended Surface -Mount Pads:

Min. 0.080

”

x 0.112

”

[2.03x2.84]

F4810/F2410 Input EMI-Filter 10 A Output Preliminary Data Sheet

F4810/F2410 FDS (Preliminary) Ver 2 08-14-03 USA Toll Free 866 WOW-didt Page 6 of 6

Filter Part Numbering Scheme

Product

Series Input

Voltage

Rated

Load

Current Connector Finish

Tape and Reel

F 48 10 - S - R

Filter

Module

48: ≤ 80 V

24: ≤ 45 V

10 Adc

No letter ⇒ Gold Plated

S ⇒ Tin/Lead Plated

No letter ⇒ Bulk

R ⇒ Tape and Reel

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

Please consult factory regarding availability of a specific version.

For more information please contact

di/dt, a Power-One company

1822 Aston Avenue •• Carlsbad, CA •• 92008 •• USA

USA Toll Free 866-WOW-didt (969-3438)

www.didt.com •• support@didt.com

The information and specifications contained in this data sheet are believed to be accurate and reliable at the time of publication. However, di/dt, Inc. assumes no responsibility for its use or for

any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of di/dt, Inc. Specifi-

cations are subject to change without notice.