SIP12506DMP-TI-E3 データシートの表示（PDF） - Vishay Semiconductors

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SIP12506DMP-TI-E3

1-MHz Boost Converter with OVP for White LED Applications

Vishay Semiconductors 

SiP12506

Vishay Siliconix

Product is End of Life 3/2014

VIN

4.7 µF

SHD

MBR0530

10 µH

2

VIN

3

SHD

1

LX

COUT

1 µF

VOUT

SiP12506

5

VOUT

GND

4

FB

0.208 V

6

R3

20 KΩ

R2

10 KΩ

R1

R4

R5

R6

15 Ω

RDC

100 KΩ

C DC

0.1 µF

PWM > 22 KHz

Figure 11. White LED driver with adjustable brightness control using a filtered PWM signal

VIN

4.7 µF

SHD

MBR0530

2

VIN

10 µH

3 SHD

1

LX

COUT

1 µF

R1

SiP12506

5

VOUT

GND

4

FB

0.208 V

6

R2

PWM

> 22 KHz

R3

VOUT

R4

R5

R6

Figure 12. White LED driver with a fixed output and adjustable brightness control using a filtered PWM signal

OPEN-CIRCUIT PROTECTION:

In the event of an output open circuit (e.g. when the LEDs are

either disconnected form the output or an LED fails), the

feedback voltage will become zero causing the SiP12506 to

go to maximum duty cycle. This would generally result in a

high output voltage and, possibly, cause the voltage on the

LX pin to exceed it's absolute maximum rating and damage

the part. However, the SiP12506 has a built-in over-voltage

protection circuitry that will clamp the output to 20 V and guar-

antee safe operation under open-circuit conditions.

Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Tech-

nology and Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability

data, see http://www.vishay.com/ppg?73861.

www.vishay.com

10

Document Number: 73861

S-70547–Rev. D, 26-Mar-07

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