Cosel CBS50, CBS100, CBS350, CBS450, CBS5024 Instruction Manual

The information contained in this document has been carefully researched and is, to the best
of our knowledge, accurate. However, we assume no liability for any product failures or
damages, immediate or consequential, resulting from the use of the information provided
herein. Our products are not intended for use in systems in which failures of product could
result in personal injury. All trademarks mentioned herein are property of their respective
owners. All specifications are subject to change without notice.

Instruction Manual

CBS-Series

Cosel

Our company network supports you worldwide with offices in Germany, Austria,

Switzerland, Great Britain and the USA. For more information please contact:

FORTEC Elektronik AG
Hauptniederlassung
Lechwiesenstr. 9
86899 Landsberg am Lech

Telefon: [phone]
Telefax: [phone]
E-Mail: [e-mail]

Internet: www.fortecag.de

FORTEC Elektronik AG
Büro Nord
Am Hasenkamp 36
22457 Hamburg

Telefon: [phone]
Telefax: [phone]
E-Mail: [e-mail]

Internet: www.fortecag.de

FORTEC Elektronik AG
Büro West
Hohenstaufenring 55
50674 Köln

Telefon: [phone]
Telefax: [phone]
E-Mail: [e-mail]
Internet: www.fortecag.de

FORTEC Elektronik AG

Büro Wien
Nuschinggasse 12
A-1230 Wien

Telefon: [phone]
Telefax: [phone]
E-Mail: [e-mail]
Internet: www.fortec.at

ALTRAC AG
(Tochter der FORTEC):
Bahnhofstraße 3
CH-5436 Würenlos

Telefon: [phone]
Telefax: [phone]
E-Mail: [e-mail]
Internet: www.altrac.ch

CBS

Basic Characteristics Data

CBS50 310 - - Yes Yes

*

1

CBS100 370

-

- Ye s Ye s

*

1

CBS200 - Yes Yes

*

1

CBS350 - Yes Yes

*

1

1

Aluminum

Aluminum

Aluminum

Aluminum

-

-

370

370

Forward

converter

Forward

converter

Forward

converter

Forward

converter

CBS450 - Yes Yes

*

Aluminum-370Forward converter

table No.1

Refer

to

input fuse

Circuit method

operation availability

Rated

Model

frequency

Switching

[A]

current

Input

Series/Redundancy

Redundancy

operation

PCB/Pattern

current

protection

Inrush

Material

Double

sidedsided

Single

Series

operation

Basic Characteristics Data

[kHz]

*1 Refer to Instruction Manual.

[A]

Model

3.3V 5V

Output Voltage

12V 15V 24V 28V

CBS5024

CBS5048

CBS10024

CBS10048

CBS20024

CBS20048

2.0

1.0

4.1

2.0

6.1

3.0

2.5

1.3

5.0

2.5

7.6

3.8

2.4

1.2

4.8

2.4

9.6

4.8

2.4

1.2

4.8

2.4

9.6

4.8

2.4

1.2

4.8

2.4

9.7

4.8

2.4

1.2

4.8

2.4

9.7

4.8

Table1. The value of input current(at rated input voltage and rated load

)

4.8

48V

-

-

-

-

-

32V

-

-

-

-

-

-

CBS35024

CBS35048

17

8.2

14

8.2

1.8V 2.5V

1.2

0.6

2.5

1.2

3.8

1.9

1.6

0.8

3.2

1.6

4.8

2.4

-

-

-

-

-

-

CBS45048 - - -

-

-

-

-8.4

---

15 17

8.1

17

8.2

-9.310.510.6

CBS-12

1 Pin Confi guration

CBS-14

2 Connection for Standard Use

CBS-14

6.1 Mounting method

6.2 Stress onto the pins

6.3 Cleaning

6.4 Soldering temperature

6.5 Derating

6.6 Heat sink(Optional parts)

6.7 Addition of a Heat sink(Optional:FO)

CBS-18

CBS-18

CBS-19

CBS-19

CBS-19

CBS-19

CBS-20

4.1 Overcurrent protection

4.2 Overvoltage protection

4.3 Thermal protection

4.4 Remote ON/OFF

4.5 Remote sensing

4.6 Adjustable voltage range

4.7 Withstanding Voltage / Isolation Voltage

5 Series and Parallel Operation

CBS-18

5.1 Series operation

5.2 Redundancy operation

6 Implementation-Mounting Method

CBS-18

7 Safety Considerations

CBS-21

CBS-16

CBS-16

CBS-16

CBS-16

CBS-16

CBS-17

CBS-18

CBS-18

CBS-18

3 Wiring Input/Output Pin

CBS-14

3.1 Wiring input pin

3.2 Wiring output pin

CBS-14

CBS-15

4 Function

CBS-16

DC-DC Converters Bus Converter

.

Power Module Type

CBS-13

CBS

Instruction Manual

1 Pin Confi guration

3.1 Wiring input pin

(1) External fuse

¡

The input circuit of CBS Series does not come with a built-in fuse.

In order to protect the power module, a normal-blow fuse should

be installed to +VIN.

¡

When multiple modules get input voltage from a single front-end

power supply, a normal-blow fuse must be installed to each mod-

ule.

Model

CBS5024 CBS10024

CBS20024

CBS35024

1R8/2R5/03/05

12/15/24/28

Rated current

6A 12A 20A 25A 30A

Model

CBS5048 CBS10048

CBS20048

CBS35048
CBS45048

1R8/2R5/03/05

12/15/24/28/48

Rated current

3A 6A 10A 12A 20A

(2) Noise Filter/Grounding Capacitor

¡

A grounding capacitor C

Y

must be used to reduce the line noise

on the input line and stabilize the power module operation (Fig.

2.1). Note that resonance and inductance from the input line fi lter

may cause the power module to become unstable.

¡

An appropriate fi lter must be used if conformance to the conduct-

ed noise regulation is required or if surge voltage may be applied

to the unit. Please consult us for more details.

¡

Install a grounding capacitor C

Y

of at least 4700 pF as close to the

input pins as possible (within 50mm of the pins).

2 Connection for

Standard Use

¡

The power module needs input and output connections as shown

in Fig. 2.1.

Reference: 3 ”Wiring Input/Output Pin”

6.5 ”Derating”

¡

Short the following pins to turn on the power module.

-VIN

RC, +VOUT +S, and -VOUT -S

Reference: 4.4 ”Remote ON/OFF”

4.5 ”Remote sensing”

¡

Only DC voltage can be applied to CBS Series. Applying AC volt-

age will damage the power module.

¡

The power module is designed for conduction cooling. Make

sure that heat sinks, fans, etc. are used for heat dissipation.

Refer to 6.5 ”Derating”

3

Wiring Input/Output Pin

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-14

CBS

Table 1.1 Pin Assignment

No. Pin Name Function

1

+VIN +DC input

2

RC Remote ON/OFF

3

NC No connection (CBS350/450)
CASE Wiring base plate (CBS50/100/200)

4

-VIN -DC input

5

+VOUT +DC output

6

+S +Remote sensing

7

TRM Adjustment of output voltage

8

-S -Remote sensing

9

-VOUT -DC output
Mounting hole Mounting hole

No. Pin Name Reference

1

+VIN 3.1 ”Wiring input pin”

2

RC 4.4 ”Remote ON/OFF”

3

NC
CASE

3.1 ”Wiring input pin”

4

-VIN

5

+VOUT 3.2 ”Wiring output pin”

6

+S 4.5 ”Remote sensing”

7

TRM 4.6 ”Adjustable voltage range”

8

-S 4.5 ”Remote sensing”

9

-VOUT 3.2 ”Wiring output pin”
Mounting hole 6.1 ”Mounting method”

Fig.2.1 Connection for Standard Use

Table 3.1 Recommended Fuses (Normal-Blow Type)

Fig.1.1 Pin Confi guration (bottom view)

5 +VOUT

9 -VOUT

8 -S

7 TRM

6 +S

-VIN 4

3

RC 2

+VIN 1

4-Mounting hole

(CBS50/100/200) CASE

(CBS350/450)NC

+

Co

Load

+VIN

-VIN

+VOUT

-VOUT

RC

Fuse

DC

input

Cin

+

CY

+S

-S

CASE (CBS50/100/200)
Mounting hole (CBS350/450)

Cin : External capacitor on the input side
Co : External capacitor on the output side
C

Y

: Primary decoupling capacitor

(5) Reverse Input Voltage Protection

¡

Avoid applying reversed-polarity voltage to the power module as it

will damage the power module. To protect the power module from

reversed polarity voltage, installing an external diode as shown in

Fig. 3.3 is recommended.

¡

If the total capacitance of the grounding capacitor exceeds 15000

pF, the specifi ed isolation voltage between input and output may

not be satisfi ed. In this case, either reduce the capacitance of the

grounding capacitor at the input or install a grounding capacitor to

the output.

There is no maximum limit to capacitance C

Y

when the power

module is used with an isolation voltage of less than 500VAC (1

min.) between input and output.

(3) External Capacitor on the Input

¡

An external capacitor Cin must be installed between +VIN and

-VIN to reduce line noise and stabilize the power module opera-

tion (Fig. 2.1).

¡

The capacitor must be installed less than 50mm of the power

module. As ripple current will fl ow through this capacitor, pay at-

tention to the ripple current rating of the capacitor.

¡

If the power module is to be turned ON/OFF directly with a switch,

inductance from the input line will induce a surge voltage several

times that of the input voltage and it may damage the power mod-

ule. Make sure that the surge is absorbed, for example, by con-

necting an electrolytic capacitor between the input pins.

(4) Input Voltage Range/Input Current Range

¡

Keep the input voltage ripple within the specifi cations below. Out-

put ripple voltage will increase as these values increase.

¡

Make sure that the peak input voltage stays within the specifi ed

input voltage range of the power module.

¡

Choose a front end power supply that can supply enough current

Ip (Fig. 3.2) for starting up the power module.

3.2 Wiring output pin

¡

Install an external capacitor Co between +VOUT and -VOUT to

increase stability of output (Fig. 2.1).

Recommended capacitance of Co is shown in Table 3.2.

¡

Choose a high frequency type electrolytic capacitor for Co. Output

ripple and rise time will be infl uenced by the capacitor’s ESR and

ESL and the wiring impedance.

¡

As ripple current will fl ow through capacitor Co, pay attention to

the ripple current rating of the capacitor.

¡

Install capacitor Co as close to the power module as possible

(within 50mm).

This is useful for reducing radiated noise and increasing stability

of the power module operation.

Base plate temperature : Tc=-20 to +100

C

VOUT 1.8V/2.5V/3.3V/5V 12V 15V 24V 28V 32V 48V
CBS50 2200 470 220
CBS100 2200 470 220
CBS200 2200 1000 470 330
CBS350

470 220

CBS450

220

Base plate temperature : Tc=-40 to +100

C

VOUT 1.8V/2.5V/3.3V/5V 12V 15V 24V 28V 32V 48V
CBS50 2200

X

2 470X2 220X2
CBS100 2200X2 470X2 220X2
CBS200 2200X2 1000X2 470X2

330X3

CBS350

470X3

220X3

CBS450

220X3

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-15

CBS

Ripple
voltage

Input voltage [V]

Input voltage range

Time t

Fig.3.1 Input Voltage Ripple

Fig.3.2 Input Current Characteristics

+VIN

-VIN

DC IN

+VIN

-VIN

DC IN

(a) (b)

Fig.3.3 Reverse Input Voltage Protection

Table 3.2 Recommended Capacitance for External Output Capacitor Co ( F)

lp

Input current [A]

Input voltage [V]

Input voltage range

Ripple voltage CBS50/100/200/35024:less than 2Vp-p

CBS50/100/200/35048:less than 4Vp-p

CBS45048:less than 4Vp-p

Capacitance CBS50/100/20024:at least 68 F

CBS50/100/20048:at least 33 F

CBS35024:at least 220 FX2

CBS45048:at least 68 FX2

Tc=-20 to +100C Electrolytic or Ceramic capacitor
Tc=-40 to +100C Ceramic capacitor

CBS35048:at least 68 FX2

4 Function

4.1 Overcurrent protection

¡

Over Current Protection (OCP) is built in and works at 105% of

the rated current or higher. However, use in an over current situa-

tion must be avoided whenever possible. The output voltage of the

power module will recover automatically if the fault causing over

current is corrected.

When the output voltage drops after OCP works, the power mod-

ule enters a ”hiccup mode” where it repeatedly turns on and off at

a certain frequency.

4.2 Overvoltage protection

¡

Over Voltage Protection (OVP) is built in. When OVP works, out-

put voltage can be recovered by shutting down DC input for at

least one second or by turning off the remote control switch for

one second without shutting down the DC input. The recovery

time varies according to input voltage and input capacitance.

¡

The specifi ed ripple and ripple noise are measured by the method

introduced in Fig. 3.4.

Remarks:

Note that devices inside the power module may fail when a volt-

age greater than the rated output voltage is applied from an exter-

nal power supply to the output terminal of the power module. This

could happen in in-coming inspections that include OVP function

test or when voltage is applied from the load circuit. OVP can be

tested by using the TRM terminal. Consult us for details.

4.3 Thermal protection

¡

Over Temperature Protection (OTP) is built in. If the base plate

temperature exceeds 100C, OTP will work, causing the output

voltage to drop. Output voltage can be recovered by shutting

down DC input for at least one second or by turning RC off for one

second without shutting down the DC input.

4.4 Remote ON/OFF

¡

The remote ON/OFF function is incorporated in the input circuit

and operated with RC and -VIN. If positive logic control is re-

quired, order the power module with ”-R” option.

ON/OFF logic

Between RC and -VIN

Output voltage

Standard Negative

L level(0 - 1.2V) or short ON
H level(3.5 - 7.0V) or open OFF

Optional

-R

Positive

L level(0 - 1.2V) or short OFF
H level(3.5 - 7.0V) or open ON

¡

When RC is at low level, a current of 0.5mA typ will flow out.

When Vcc is used, keep it within the following rage:

3.5 [ VCC [ 7V.

When remote ON/OFF is not used, short RC and -VIN.

4.5 Remote sensing

(1) When Remote Sensing is Not Used

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-16

CBS

Fig.3.4 Method of Measuring Output Ripple and Ripple Noise

Fig. 4.1 RC Connection Example

Table 4.1 Remote ON/OFF Specifi cations

Transistor

IC Relay

Vcc

Opto coupler

RC

-VIN

RC

-VIN

RC

-VIN

RC

-VIN

+S

+VOUT

-S

-VOUT

+

Co

Short at pin root

Load

Fig. 4.2 When Remote Sensing is Not Used

DC
input

Cin

CBS50/100/200

4700pF

+

50mm

+VIN

Oscilloscope

BW : 20MHz

-VIN

CASE

+VOUT

-VOUT

-S

+S

0.1 F

Co

+

Measuring board

Load

RC

DC

input

Cin

4700pF

+

50mm

+VIN

Oscilloscope
BW : 100MHz

-VIN

Mounting
hole

+VOUT

-VOUT

-S

+S

0.1

F

Co

+

Measuring board

Load

RC

1.5m 50W

Coaxial Cable

R=50

W

C=0.01 F

R

C

CBS350

CBS350/450

¡

When remote sensing is not used, make sure +VOUT and +S are

shorted, and that -VOUT and -S are shorted as well.

¡

Keep the patterns between +S and +VOUT and between -S and

-VOUT as short as possible. Avoid a looping pattern. If noise en-

ters the loop, the operation of the power module will become un-

stable.

(2) When Remote Sensing is Used

¡

Using remote sensing with long wires may cause output voltage to

become unstable. Consult us if long sensing wiring is necessary.

¡

Sensing patterns or wires should be as short as possible. If wires

are used, use either twisted-pair or shielded wires.

¡

Use wide PCB patterns or thick wires between the power module

and the load. Line drop should be kept less than 0.3V. Make sure

output voltage from the power module stays within the specifi ed

range.

¡

If the sensing patterns are shorted by mistake, a large current may

fl ow and damage the pattern. This can be prevented by installing

fuses or resistors close to the load.

As wiring or load impedance may generate oscillation or large

fluctuations in output voltage, make sure enough evaluation is

given in advance.

4.6 Adjustable voltage range

¡

Output voltage can be adjusted by connecting an external potenti-

ometer (VR1) and resistors (R1 and R2) as shown in Fig. 4.5.

Output voltage will increase if the resistance between 1 and 2 is

reduced by turning the potentiometer clockwise.

Recommended values for external components are shown in

Table 4.2.

Consult us if the power module is used in a different confi guration.

¡

Output voltage between +VOUT and -VOUT can be adjusted by

connecting external resistors to TRM.

However, when the input voltage is 18 - 20VDC with CBS50/100/

20024 or 36 - 40VDC with CBS50/100/20048, the output voltage

adjustment range is 60 - 105% of the rated output voltage except

for 1.8/2.5/48V output models.

When input voltage is 20 - 22VDC with CBS35024 models or 36

- 40VDC with CBS35048 models, the output voltage adjustment

range becomes as shown in Fig. 4.4-1.

¡

The wiring to the potentiometer should be as short as possible.

As the ambient temperature fl uctuation characteristics deteriorates

depending on the types of resistors and potentiometers used,

please use resistors and potentiometers of the following specifi ca-

tions:

Resistors

.............

Metal fi lm type, coeffi cient less than ±100ppm/

C

Potentiometers

...

Cermet type, coeffi cient less than ±300ppm/

C

¡

When output voltage adjustment is not required, open TRM.

¡

Note that, when adjusting output voltage, setting output voltage

too high may cause OVP to work.

Control Amp. of
rated voltage

VOUT

1.8V

2.5V

3.3 - 48V

RB

1.3kW

1.8kW
3kW

-

+

+S
+VOUT

TRM

-S

-VOUT

2.5V

RA

3kW

RB

RC
1kW

R2

R1

1

VR1
5kW

3

2

The output adjustment range for CBS450 is shown in Fig. 4.4-2.

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-17

CBS

Fig. 4.5 Connecting External Parts

+S

Co

-S

+VOUT

-VOUT

+

Wire as close as possible

Load

Fig. 4.3 When Remote Sensing is Used

Fig. 4.4-1 CBS350 Output Voltage Adjustment Range

Fig. 4.4-2 CBS450 Output Voltage Adjustment Range

OUTPUT VOLTAGE [V]

OUTPUT VOLTAGE [V]

INPUT VOLTAGE [V]

CBS4504828

26.0

25.0

24.0

19.2

0

380

0

040 57

60

32.2

30.8

28.0

16.8

3640 60

76

INPUT VOLTAGE [V]

CBS4504824

ADJUSTMENT RANGE [%]

ADJUSTMENT RANGE [%]

INPUT VOLTAGE [V]

CBS35048

OO

INPUT VOLTAGE [V]

CBS35024

OO

20

100

105

110

21 22 230

00

80
60

32,48

12,24,28

36

100

105

110

115

38 40 420

80
60

32,48

48

12,24,28

35.2

32.0

25.6

0

36040

76

OUTPUT VOLTAGE [V]

INPUT VOLTAGE [V]

CBS4504832

5.1 Series operation

¡

Multiple CBS units can be used in series. Keep the output current

less than the smallest specifi ed rated current of the modules con-

nected in series. Make sure the current fl own into the power mod-

ule will not exceed the rated current.

5.2 Redundancy operation

¡

Parallel operation is not possible.

¡

Redundancy operation is available by wiring as shown below.

5 Series and Parallel

Operation

¡

Even a slight difference in output voltage can affect the balance

between the values of I

1

and I2.

Please make sure that the value of I

3

does not exceed the rated

current of a power supply.

I

3

the rated current value

6.1 Mounting method

¡

When multiple power modules are used side by side, position

them with sufficient spaces to allow adequate air ventilation so

that the aluminum base plate temperature of each power module

will remain within the temperature range shown in the derating

curves (Fig. 6.2).

¡

Do not pass the DC input pattern underneath the power module

as this will increase conducted noise. Place the DC input pattern

away from the power module.

Do not pass the DC output pattern underneath the power module

as this will increase output noise. Place the DC output pattern

away from the power module.

¡

High frequency noise is radiated from the power module. When

mounting the power module on a PCB, leave a copper pattern

on the PCB to let it act as a shield and connect this pattern to the

CASE pin (CBS50/100/200) or the mounting hole.

¡

When a heat sink cannot be fi xed on the base plate side, order the

power module with ”-T” option. A heat sink can be mounted by affi x-

ing a M3 tap on the heat sink. In case of CBS350/450, make sure a

mounting hole will be connected to a grounding capacitor C

Y

.

Mounting hole
Standard M3 tapped
Optional : -T

f

3.4 thru

6.2 Stress onto the pins

¡

Applying excessive stress to the input or output pins of the power

module may damage internal connections. Avoid applying stress

in excess of that shown in Fig. 6.1.

¡

Input and output pins are soldered onto the internal PCB. Do not

bend or pull the leads with excessive force.

¡

As unexpected stress may be applied to the pins, set the diameter

of the PCB mounting hole at 3.5mm.

¡

As unexpected stress may be applied to the pins from vibration

or shock, fi x the power module by using the mounting holes with

screws to reduce stress.

¡

Fix the power module to the PCB with the screws before soldering

the input and output pins to prevent the PCB pattern being dam-

aged.

6 Implementation

-

Mounting Method

4.7 Withstanding Voltage / Isolation Voltage

¡

When testing the withstanding voltage, make sure the voltage is

increased gradually. When turning off, reduce the voltage gradual-

ly by using the dial of the hi-pot tester. Do not use a voltage tester

with a timer as it may generate voltage several times as large as

the applied voltage.

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-18

CBS

Fig. 5.1 Examples of Series Operation

Load

Load

Power
Supply

Power
Supply

Load

Power
Supply

Power
Supply

(a) (b)

Fig. 5.2 Example of Redundancy Operation

Table 6.1 Mounting Hole Confi guration

+S

+VOUT

-S

-VOUT

+S

+VOUT

-S

-VOUT

Load

I

I

1 I3

2

Table 4.2 Recommended Values of External Resistors

No. VOUT

Adjustable range

VOUT±5% VOUT±10%

R1 R2 R1 R2

1 1.8V 1.8k

W

6.2k

W

1.6k

W

3.6k

W

2 2.5V 2.7k

W

7.5k

W

2.4k

W

4.7k

W

3 3.3V 2.4k

W

11k

W

2.4k

W

6.8k

W

4 5V 5.6k

W

5.6k

W

5 12V 18k

W

18k

W

6 15V 24k

W

24k

W

7 24V 43k

W

39k

W

8 28V 51k

W

47k

W

9 32V 56k

W

56k

W

10 48V 82k

W

82k

W

6.3 Cleaning

¡

Clean the soldered side of the power module with a brush.

Prevent liquid from getting into the power module. Do not clean by

soaking the power module into liquid.

¡

Do not allow solvent to come in contact with product labels or res-

in cases as this may change the color of the resin case or cause

deletion of the letters printed on the product label.

¡

After cleaning, dry the power modules well.

6.4 Soldering temperature

¡

Flow soldering: 260C for up to 15 seconds.

¡

Soldering iron (26W): 450C for up to 5 seconds.

6.5 Derating

¡

Use the power modules with conduction cooling (e.g. heat dissipa-

tion from the aluminum base plate to the attached heat sink).

Fig. 6.2 shows the derating curves with respect to the aluminum

base plate temperature. Note that operation within the hatched ar-

eas will cause a signifi cant level of ripple and ripple noise. Contact

us for more information on cooling methods.

¡

It is necessary to note thermal fatigue life by power cycle.

Please reduce the temperature fl uctuation range as much as pos-

sible when the up and down of temperature are frequently gener-

ated.

Contact for more information on cooling methods.

6.6 Heat sink(Optional parts)

¡

The power module works with conduction cooling and needs heat

dissipation using heat sinks. Optional heat sinks are available for

CBS Series. Refer to Table 6.2 for details on the thermal resis-

tance of heat sinks.

No. Model

Size[mm]

Thermal resistance[C/W]

Style

HWD

Convection

(0.1m/s)

Forced Air

1 F-CBS-F1 12.7 57.9 61.5

7.5

Refer Fig.6.4

Horizontal
2 F-CBS-F2 12.7 58.4 61.0 Vertical
3 F-CBS-F3 25.4 57.9 61.5

4.6

Horizontal
4 F-CBS-F4 25.4 58.4 61.0 Vertical
5 F-CBS-F5 38.1 57.9 61.5

3.0

Horizontal
6 F-CBS-F6 38.1 58.4 61.0 Vertical

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-19

CBS

+VOUT

-VOUT

-S

TRM

+S

-VIN

CASE

RC

NC

+VIN

+VOUT, -VOUT

39.2N(4kgf) 39.2N(4kgf)

Less thanLess than

Less than

39.2N(4kgf)

19.6N(2kgf) 19.6N(2kgf)

19.6N(2kgf)

Others

Less thanLess than

Less than

Fig. 6.1 Stress onto Pins

Fig.6.2 Derating Curve

Tc:Measuring point

Table 6.2 Types of Heat Sinks Available

Fig.6.3 Heat Sink Types

Aluminum base plate

Horizontal Vertical

Load factor[%]

Aluminum base plate temperature Tc [C]

-40

-20 0 20 40 60 80 100 110

0

(15)

(75)

50

100

CBS450

(85)

Aluminum base plate temperature Tc [C]

Load factor[%]

-40 -20 0 20 40 60 80 100 110

0

50

100

2
1

(85)

1CBS200O12,15,24,28 4
2Others (Excluding CBS350/450)

,8

W

D

H

W

D

H

Aluminum base plate temperature Tc [C]

Load factor[%]

-40 -20 0 20 40 60 80 100 110

0

(15)

(85.7)
(83.3)

50

100

2

(85)

1CBS3502412,CBS3502448,CBS3504848
2

Others

(CBS350)

1

6.7 Addition of a Heat sink(Optional:FO)

¡

Heat sink pre-attached models are also available.

(Except CBS350/450)

Option

Size[mm]

Weight

[g]

Style

Heat sink

type name

HWD

F1 26.5 58.7 62.5

150 or less

Horizontal F-CBS-F1
F2 26.5 59.5 62.0 Vertical F-CBS-F2
F3 39.2 58.7 62.5

170 or less

Horizontal F-CBS-F3
F4 39.2 59.5 62.0 Vertical F-CBS-F4
F5 52.0 58.7 62.5

185 or less

Horizontal F-CBS-F5
F6 52.0 59.5 62.0 Vertical F-CBS-F6

¡

Derating curve characteristics with respect to aluminum base plate

temperature are shown in Fig. 6.6. Measure the temperature of

the base plate in a location away from direct airfl ow (A). Note that

operation within the hatched areas will cause a signifi cant level of

ripple and ripple noise.

¡

Make sure that PCB mounting screws do not touch the heat sink

mounting screws.

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-20

CBS

Fig.6.4 Thermal Resistance of Heat Sink(Forced Air)

Table 6.3 Types of Heat Sink Pre-Attached Models Available

W

D

H

W

D

H

Fig. 6.5 Dimensions of Heat Sink Pre-Attached Models

Fig. 6.6 Derating Curve Characteristics

A

Air

Fig. 6.7 Measuring Point

Fig. 6.8 PCB Mounting Screw Dimensions

Mounting hole

PCB

M3(Mounting screw)

7mm max

0

1

2

3

4

5

6

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Wind velocity(m/s)

Thermal resistance( /w)

F-CBS-F1/F2

F-CBS-F3/F4

F-CBS-F5/F6

C

-20 0 20 40 60 80 100 110

0

50

(95)

1CBS200 12, 15, 24, 28, 48
2Others (Excluding CBS350/450)

90-40

Aluminum base plate temperature Tc[ ]

C

100

Load factor[%]

1

2

Horizontal Vertical

7

Safety Considerations

¡

To apply for safety standard approvals with the power module, the

following conditions must be met. Consult us for more details.

¿

The power modules must be used as a component power supply
in end-use equipment.

¿

Neither basic isolation nor double/reinforced isolation is provided
across input, output and the base plate of the power module. If

the power module is to be used with input voltage of more than

60VDC and needs basic or double/reinforced isolation, the re-

quired isolation must be provided in the construction of the fi nal

product.

¿

Use external fuses that comply with safety standards at the in­put.

DC-DC Converters Bus Converter

.

Power Module Type

Instruction Manual

CBS-21

CBS

Our company network supports you w

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