SIP12501 データシートの表示（PDF） - Vishay Semiconductors

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SIP12501

Boost Converter for Single/Double AA Cell or NiMH Battery for White LED Applications

Vishay Semiconductors 

Product is End of Life 3/2014

PIN CONFIGURATION AND TRUTH TABLE

PowerPAK MLP33-6

XSHD

1

VIN

2

VOUT

3

6

LX

5

GND

4

FB

Top View

SiP12501

Vishay Siliconix

ORDERING INFORMATION

Part Number

SiP12501DMP-T1-E3

Temperature Range

- 40 °C to 85 °C

Marking

2501

PIN DESCRIPTION

Pin Number Name

Function

1

XSDH Logic controlled shutdown input, XSHD = high: normal operation, XSHD = low: shutdown

2

VIN

Battery input voltage

3

VOUT Output of the boost converter and power source for the IC

4

FB

Feedback pin

5

GND Signal and power ground

6

LX

Switch pin

PIN FUNCTIONS

XSHD (Pin 1)

XSHD is the logic controlled shutdown input pin. When

XSHD is low, the IC is shutdown and an antiringing switch is

connected between LX and VIN. When XSHD is high, the IC

is working in normal operation.

VIN (Pin 2)

VIN is the pin connected to battery input voltage. The IC gets

its start-up bias from VIN at the beginning. Once VOUT

exceeds VIN, bias will come from VOUT. Thus, once started,

operation is completely independent from VIN. Operation is

only limited by the output voltage level and the battery’s

internal series resistance.

VOUT (Pin 3)

VOUT is the output of the boost converter and also the power

source for the IC.

FB (Pin 4)

FB is the feedback voltage pin, it senses the LED current

through the ballast resistor, the difference between it and the

internal 0.3 V reference is amplified by the error amplifier.

GND (Pin 5)

GND is the pin for signal and power ground.

LX (Pin 6)

LX is the pin of the drain for internal power MOS. LX is also

connected to inductor and Schottky diode. If the inductor

current falls to zero, or XSHD is low, an internal antiringing

switch is connected from LX to VIN to minimize EMI.

Document Number: 73192

S09-1455-Rev. B, 03-Aug-09

www.vishay.com

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