Excellence in Electronics

ROHM Co. Ltd. is based in Kyoto, Japan manufacturing company. Established in 1958, ROHM designs and manufactures integrated circuits (ICs), discrete semiconductors, optoelectronics, passive components and other electronic components for through hole and SMD assembly. All these components find a home in the dynamic and ever-growing electronics market. Some of the most innovative equipment and devices in the world use ROHM products. Ranked as one of the leading global manufacturers of semiconductors, ROHM is offering wide range of products, covering most types of electronic components. The manufacturing facilities of the company are concentrated in Japan and Far East. The quality of Rohm products is proven by a number of quality certificates.


PRODUCTS LINKS
   

High Quality Switching Regulators

 

Rohm high efficient switching mode regulator series, with high output current and working frequency up to 500 kHz is suitable for powering big electronic modules like printers, scanners or GSM modules. Recommended for powering Cinterion GSM modules.
 
ROHM's switching regulators are suitable for powering Cinterion GSM modules.
 
You can download datasheet by clicking on the name placed in "Order Code" column of every table.
 
Download design application note here
 

Order code

BD9778HFP

BD9778F
BD9781HFP
BD9001F

Unit

Maximum output current

2

2

 4 2

A

Maximum power dissipation

5.5

0.65

 5.5 0.69

W

Supply voltage VIN

5 to 35

5 to 35

5 to 35

 7 to 48

V

Output voltage

1 to VIN

1 toVIN

1 toVIN

1 toVIN

V

Reference voltage precision

±0.5

±0.5

±0.5

±0.5

%

Operating temperature

-40 to+125

-40 to +125

-40 to +125

-40 to +95

ºC

Operating frequency

50 to 500

50 to 500

50 to 500

50 to 500

kHz

Oscillation mode

Self oscillation

Self oscillation

Self oscillation

Self oscillation

Package

HRP7

SOP8

HRP7

SOP8

Price

 

BD9778HFP Flexible switching regulator with high output current

 

ROHM and Comet Electronics offer you high power flexible switching regulator with output current up to 2 A, suitable for powering big electronic modules like printer modules, scanners, GSM modules.

 

  • High maximum output current (2A)

  • Wide input voltage range

  • On chip switching P channel MOSFET

  • Adjustable output voltage up to VIN

  • Selectable operating frequency up to 500kHz

  • Wide operating temperature range

  • Over current protected output

  • Built in temperature shut down circuit

  • Enable pin for external mode control

  • High power package HRP7

  • Soft start function

BD9778HFP

Parameter

Value

Unit

Maximum output current

2

A

Maximum power dissipation

5.5

W

Supply voltage VIN

5 to 35

V

Output voltage

1 to VIN

V

Reference voltage precision

±0.5

%

Operating temperature

-40 to +125

ºC

Operating frequency

50 to 500

kHz

Oscillation mode

Self oscillation

 

Package

HRP7

 

See also :
BD9781HFP - Switching regulator with maximum output cuurrent 2 А, package HRP7;
BD9001F - Switching regulator with maximum input voltage 48 V, output cuurrent 2 А, package SO8;
 
Download design application note here
 

Application information: BD9778HFP Demo PCB and Application schematic
 

Download datasheet

 

 

PACKAGE DRAWING

 

Download

BD9778HFP Demo PCB
 

The BD9778HFP Demo board is capable of working as standard SMPS module, or as Constant Current High Power LED driver.

Applications:

  • Powering Sony Ericsson M2M GSM/GPRS radio devices GM/GR47 and GR/GS64;
  • Constant Current High Power LED driver, suitable for CREE XLamp series;

Download Application schematic .pdf

Download design application note here

Application schematics supported by BD9778HFP Demo PCB
 
Standard 5V/1A DC/DC step-down converter
 

 

Output voltage calculation:

 , VREF = 1.00 V – internally generated

 

Download design application note here
 

For prices and availability, please click on the name placed in "Order Code" column of every table.

 

Input and output ripple

Bill of materials

Click to enlarge

Designator

Part

Order code

Note

U1

BD9778HFP

BD9778HFP ROHM

HRP7

D1

1N5819

1N5819(SS14) SMD (SMA)

Schottky

D2

1N5822

1N5822(SS34) SMD (SMC)

Schottky

L1

Inductor 10 μH

CL10uH DRH125

SMD

LF1

2x22 mH, 0.8 A

Kaschke 094.916

Line filter

F1

1.6 A fuse

PFRA.160 SCHURTER

Resettable

C1

Capacitor 220 μF

CE 220uF 35V Fujicon

Electrolitic

C3

Capacitor 33 nF

C1206 33nF 50V X7R

Ceramic

C4

Capacitor 470 nF

C1206 470nF 50V X7R

Ceramic

C5

Capacitor 470 μF

CE 470uF 16V 105C LOW ESR

LOW ESR

C8, C10

Capacitor 100 nF

C1206 100nF 50V X7R

Ceramic

C9

Capacitor 6.8 nF

C1206 6.8nF 50V X7R

Ceramic

R1

Resistor 10kΩ 5%

R1206 10K 5%

R2

Resistor 15kΩ 1%

R1206 15K 1%

Precise
CH1 – Output, CH2 – Input J1, CH3 – D2 Anode after LF1

R3

Resistor 5.1kΩ 1%

R1206 5.1K 1%

Precise

Output voltage:

VOUT = 4.9 V   

Input voltage:

VIN = 12 V

Output current:

IOUT = 1 A

Operating frequency:

 fSW = 440kHz

Ambient temperature:

T0 = 25 °C

Input current :

IIN = 540 mA

R4

Resistor 56kΩ 1%

R1206 56K 1%

Precise

R6

Resistor 20kΩ 1%

R1206 20K 1%

Precise

J1

Terminal block 2 pin

TS-502 2P

 

J2

Terminal block 3 pin

TS-502 3P

 

PCB

PCB, no components

BD9778HFP Demo PCB

 

 

Download Application schematic .pdf

 

White Power LED driver with dimming
 

 

Calculating the forward LED current IF (no dimming):

 RCS – Current sense resistor
 

 

For prices and availability, please click on the name placed in "Order Code" column of every table.
 
Download design application note here

 

Driving 3 white 1W LEDs XL7090

Bill of materials

(R1 mounted, no dimming)

Click to enlarge

Designator

Part

Order code

Note

U1

BD9778HFP

BD9778HFP ROHM

 

D1, D2

1N5819

1N5819(SS14) SMD (SMA)

Schottky

L1

Inductor 10 μH

CL10uH SD73

SMD

LF1

2x12 mH, 0.54A

Kaschke 071.921

Line filter

F1

1.6 A fuse

PFRA.160 SCHURTER

Resettable

C1

Capacitor 220 μF

CE 220uF 35V Fujicon

Electrolitic

C3

Capacitor 33 nF

C1206 33nF 50V X7R

Ceramic

C4

Capacitor 470 nF

C1206 470nF 50V X7R

Ceramic

C5

Capacitor 220 μF

CE 220uF 25V 105C LOW ESR

LOW ESR

C8, C10

Capacitor 100 nF

C1206 100nF 50V X7R

Ceramic

C9

Capacitor 6.8 nF

C1206 6.8nF 50V X7R

Ceramic

R1

Resistor 10kΩ 5%

R1206 10K 5%

 

R2

Resistor 15kΩ 1%

R1206 15K 1%

Precise

R3

Resistor 3.3kΩ 1%

R1206 3.3K 1%

Precise

R4

Resistor 56kΩ 1%

R1206 56K 1%

Precise
CH1 – Output,  CH2 – InputJ1, CH3 – D1 Anode, after LF1

R6

Resistor 220Ω 1%

R1206 220R 1%

Precise

Forward LEDs current:

IF = 320 mA

Forward LEDs voltage:

VF = 10.3 V

(Over all 3 LEDs)

Total output voltage:

VOUT = 10.68 V

Input voltage range:

VIN = 14 ÷ 30V

Operating frequency:

fSW = 440 kHz

Input current @VINmin:

IINmax = 300mA

Input voltage:

VIN = 18 V

R7, R8, R9

Resistor 3.3Ω 1%

R1206 3.3R 1%

Precise

J1, J3

Terminal block 2 pin

TS-502 2P

 

J2

Terminal block 3 pin

TS-502 3P

 

PCB

PCB, no components

BD9778HFP Demo PCB

 

Download Application schematic .pdf

 

Dimming 3 white 1W LEDs XL7090
 

(Resistor R1 is not mounted, dimming through  J3)
Input voltage: VIN = 18V,    Dimming frequency: fDIMM = 80 Hz,     Operating frequency: fSW = 440 kHz.

 

 

Forward LEDs current:  IF = 200 mA

Forward LEDs voltage:  VF = 9.6 V (Over all 3 LEDs)

Duty cycle:                  D = tON/T = 0.81

    

Forward LEDs current:  IF = 80 mA

Forward LEDs voltage:  VF = 8.7 V (Over all 3 LEDs)

Duty cycle:                  D = tON/T = 0.42
     
 
Click to enlarge   Click to enlarge

CH1 – PWM Pulse train, CH2 – Output voltage

  

CH1 – PWM Pulse train, CH2 – Output voltage

 

For additional information about prices and delivery terms for ordering ROHM products, please contact Comet Electronics

POWER ICs and MODULES

 

 Hybrid Power Modules

 

ROHM offers a variety of hybrid AC/DC and DC/DC power modules. As global electronic components manufacturer, ROHM makes most of parts that go into our Power Modules, witch results with high performance hybrid power modules. Standard SIP packages ensure easy integration and optimal space requirement for ROHM's hybrid power modules.

 

DC/DC Converters
 

High efficient, small size modules with standard output voltages.

 

 

You can download a datasheet by clicking on the name placed in "Order Code" column of every table.

 

High input voltage step-down DC/DC  converter
Order code Input voltage, VDC Output voltage, V Maximum output current, A Operating temperature, ºC Package Price
BP5722-12 ROHM 224-358 12 1 -25 ÷ +80 SIP11

 

Wide input range step-down DC/DC converters
Order code Input voltage, VDC Output voltage, V Maximum output current, A Operating temperature, ºC Package Price
BP5020A(BP5220) ROHM 8 - 38 5 1 -20 ÷ +70 SIP9
BP5021A(BP5221) ROHM 8 - 38 5 0.5 -20 ÷ +70 SIP9
BP5022A(BP5222) ROHM 15 - 38 12 0.5 -20 ÷ +70 SIP9

 

High output current step-down DC/DC converters
Order code Input voltage, VDC Output voltage, V Maximum output current, A Operating temperature, ºC Package Price
BP5233-33A 4.5 - 5.5 3.3 3 -20 ÷ +55 SIP11
BP5234-33A 4.5 - 5.5 3.3 4 -20 ÷ +55 SIP11

 

AC/DC Converters
 

For powering your devices directly from 220 VAC power network, Rohm and Comet Electronics offer you a high quality hybrid AC/DC converters in standard space saving SIP package.

 

 

You can download a datasheet by clicking on the name placed in "Order Code" column of every table.

 

220 VAC input AC/DC converters
Order code Input voltage, VAC Output voltage, V Maximum output current, A Operating temperature, ºC Package Price
BP5040(BP5041A5) ROHM 224 - 358 5 0.1 -25 ÷ +80 SIP10
BP5041A ROHM 224 - 358 12 0.1 -25 ÷ +80 SIP10
BP5041A15 ROHM 224 - 358 15 0.1 -25 ÷ +80 SIP10

 

High quality Low Drop Out linear regulators

 

Easy to use high quality line regulators with high efficient SMD and through hole packages.

 
You can download datasheet by clicking on the name placed in "Order Code" column of every table.
 

LDO regulators

Order code

 Output voltage, V Maximum output current, A Dropout voltage, V Note Package Price
BA033T ROHM 3.3 ±5% 1 0.3 Insulated package TO220FP
BA033ST ROHM 3.3 ±5% 1 0.3 ON/OFF, Insul. package TO220FP5
BA033SFP ROHM 3.3 ±5% 1 0.3 ON/OFF, Insul. package TO252-5
BA033CC0WFP ROHM 3.3 ±5% 1 0.3 ON/OFF, Insul. package TO252-5
BA05T ROHM 5 ±5% 1 0.3 Insulated package TO220FP
BA05ST ROHM 5 ±5% 1 0.3 ON/OFF, Insul. package TO220FP5
BA05CC0WT ROHM 5 ±5% 1 0.3 ON/OFF, Insul. package TO220FP5
BA05CC0WFP ROHM 5 ±5% 1 0.3 ON/OFF, Insul. package TO252-5

 

 

 

Standard Linear Regulators

A well known 78xx family of linear regulators with ROHM's quality.
 
You can download datasheet by clicking on the name placed in "Order Code" column of every table.
 

Standard linear regulators

Order code

 Output voltage, V Maximum output current, A Input voltage, VDC Operating temperature, ºC Maximum power dissipation, W Package Price
7805/BA17805T ROHM 5 1 7.5 ÷ 25 -40 ÷ +85 2 TO220FP
7805FP ROHM SMD 5 1 7.5 ÷ 25 -40 ÷ +85 1 TO252
7812/BA17812T ROHM 12 1 15 ÷ 27 -40 ÷ +85 2 TO220FP
7815/BA17815T ROHM 15 1 17.5 ÷ 30 -40 ÷ +85 2 TO220FP
7824/BA17824T ROHM 24 1 27 ÷ 33 -40 ÷ +85 2 TO220FP

 

For additional information about prices and delivery terms for ordering ROHM products, which are not available on stock, please contact Comet Electronics.
 

COMET ELECTRONICS

 

District Druzhba 2
47, Obikolna Str., Sofia 1582, Bulgaria
 Call center-phone: 00 359 2 915 58 55,
fax: 00 359 2 879 32 00
 Office (administration) phone: 00 359 2 915 58 00
e-mail:office@comet.bg

Romania, Bucharest, Office, Shop
Str. Grigore Ionescu No 94, Bloc T7B, Parter, Sector 2
phone: 00 40 21 243 20 90, fax: 00 40 21 243 40 90
e-mail:office@comet.srl.ro

COMET ELECTRONICS d.o.o
Bulevar Arsenija Čarnojeviča broj 17
 11070 Novi Beograd
Tel/Fax: 011 / 3113942, 2134180, 2136145
Mobile: 063 270 730
e-mail:office@comet.rs