SIP12506DMP-TI-E3 VISHAY [Vishay Siliconix], SIP12506DMP-TI-E3 Datasheet

SIP12506DMP-TI-E3

Manufacturer Part Number

SIP12506DMP-TI-E3

Description

1-MHz Boost Converter with OVP for White LED Applications

Manufacturer

VISHAY [Vishay Siliconix]

Datasheet

1.SIP12506DMP-TI-E3.pdf (11 pages)

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DESCRIPTION

The SiP12506 is a 1 MHz current-mode boost converter with

a feedback voltage of 0.208 V which offers small size and

high power conversion efficiency. Its input voltage range is

from 2.6 V to 9 V, and output voltage can go up to 20 V. The

internal frequency compensation minimizes number of exter-

nal components. The integrated 28 V power switch can carry

up to 1.6 A easily providing for 200 mA load current from a

3.6 V input supply. These features make the SiP12506 the

ideal. The internal soft-start circuit controls the rate of rise of

the output voltage during start-up to prevent overshoot. The

logic-level shutdown pin can be used to reduce quiescent

current to < 1 µA and, effectively, extend battery life. Thermal

shutdown at 160 °C is also included. The low FB voltage of

0.208 V improves the overall circuit efficiency. These fea-

tures and more, make the SiP12506 an ideal power solution

to white LED, OLED, LCD, and CCD applications operating

from a single or dual cell lithium-ion battery.

SiP12506 is available in 6-pin MLP33 package and is spec-

ified to operate over the industrial temperature range of

- 40 °C to 85 °C.

TYPICAL APPLICATION CIRCUIT

Document Number: 73861

S-70547–Rev. D, 26-Mar-07

1-MHz Boost Converter with OVP for White LED Applications

SHD

1 µF

Figure 1. SiP12506 Typical Application Circuit

SHD

OUT

SiP12506

GND

10 µH

MBR0530

0. 208 V

Cout

1 µF

10.5

OUT

FEATURES

APPLICATIONS

• Output Voltage Range up to 20 V

• FB Voltage of 0.208 V

• Cycle-By-Cycle Current Limiting with Internal

• 2.6 V to 9 V Input Voltage Range

• 1 MHz Switching Frequency

• > 90 % efficiency

• Low R

• 1.6 A Switch Current Limit

• < 1 µA Low Shutdown Current

• Internal Soft-Start Control

• Thermal Shutdown Protection (160 °C)

•

• CCD Bias Supplies

• TFT-LCD Displays

• OLED Driver

• White LED Backlight

• Digital Cameras

• Portable Phones and Game Devices

•

100

Frequency Compensation

6 pin MLP33 Package

PDAs and Palm-Top Computers

DS(on)

: 0.4 Ω (at 3.3 V)

Figure 2. Efficiency Curve

100

Load Current (mA)

150

= 3.3 V

200

Vishay Siliconix

= 5 V

OUT

SiP12506

= 7.2 V

250

= 13 V

www.vishay.com

300

RoHS

COMPLIANT

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SIP12506DMP-TI-E3 Summary of contents

Page 1

Boost Converter with OVP for White LED Applications DESCRIPTION The SiP12506 MHz current-mode boost converter with a feedback voltage of 0.208 V which offers small size and high power conversion efficiency. Its input voltage range is ...

Page 2

SiP12506 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Parameter Voltages Referenced Input Voltage V to GND Voltages OUT SHD Voltage FB Voltage a ESD (Human Body Model) Operating Junction Temperature Storage Temperature b Power Dissipation ( ...

Page 3

... Limits are guaranteed by testing. b. Typical values are derived from the mean value of a large quantity of samples tested during characterization and represent the most likely expected value of the parameter at room temperature. PIN CONFIGURATION ORDERING INFORMATION Part Number SiP12506DMP-TI-E3 PIN DESCRIPTION Pin Number Name 1 LX ...

Page 4

SiP12506 Vishay Siliconix TYPICAL CHARACTERISTICS 600 550 500 450 400 350 300 250 200 - Temperature (°C) I (Active) vs. Temperature 2 1.8 1 ...

Page 5

TYPICAL WAVEFORMS LED current (mA) Efficiency vs. LED Current - Driving ...

Page 6

SiP12506 Vishay Siliconix FUNCTIONAL BLOCK DIAGRAM - 0.208 V Reference Softstart Shutdown SHD Control DETAILED OPERATION DESCRIPTION: The SiP12506 is a current mode, internally compensated, step-up switching converter that operates at a fixed fre- quency of 1 ...

Page 7

DIODE SELECTION: A schottky diode is recommended for use as the external rec- tifier. Schottky diodes are typically preferred in DC-DC con- version applications because of their low forward voltage drop and fast recovery time, which allows for high frequency ...

Page 8

SiP12506 Vishay Siliconix OUT PEAK L(avg) L(avg This peak current varies with inductance tolerance and other errors, and the rated saturation level varies over tempera- ...

Page 9

WHITE LED BRIGHTNESS CONTROL Figures 8 and 9 delineate two possible brightness control schemes. In Figure 8, a PWM signal is injected into the shut- down pin. The average LED current is proportional to the duty cycle of the PWM ...

Page 10

SiP12506 Vishay Siliconix V IN 4.7 µ SHD SHD SiP12506 5 V OUT GND Figure 11. White LED driver with adjustable brightness control using a filtered PWM signal V IN 4.7 µ ...

Page 11

All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or ...

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