LM3530 datasheet(34/50 Pages) TI1

34 / 50 page

OVP

ILED

SCL

SDA

GND

ALS1

CIN

LM3530

2.7V to 5.5V

Up to 40V

ALS2

HWEN

VIN

Ambient Light

Sensor

Ambient Light

Sensor

INT

PWM

10 k:

VLOGIC

10 k:

COUT

LM3530

SNVS606L – JUNE 2009 – REVISED DECEMBER 2014

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The LM3530 incorporates a 40-V (maximum output) boost, a single current sink, and a dual ambient light sensor

interface. The maximum boost output voltage is 40 V (min) for the LM3530-40 version. The LM3530 boost will

drive the output voltage to whatever voltage necessary to maintain 400mV at the ILED input. The 40-V max

output typically allows the LM3530 to drive from 2 series up to 12 series LEDs (3.2V max voltage per LED). For

applications that do not use one or both of the ALS inputs, the ALS input can be connected to GND or left

floating.

9.2 Typical Application

Figure 49. LM3530 Typical Application

9.2.1 Design Requirements

Example requirements for typical voltage inverter applications:

Table 12. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Input voltage range

2.7 V to 5.5 V

Output current

0 mA to 30 mA

Boost switching frequency

500 kHz

Table 13. Application Circuit Component List

COMPONENT

MANUFACTURER

PART NUMBER

VALUE

SIZE

CURRENT/VOLTAGE RATING

TDK

VLF3014ST100MR82

10 µH

3 mm × 3 mm × 1.4 mm

ISAT = 820 mA

COUT

Murata

GRM21BR71H105KA12

1 µF

0805

50 V

CIN

Murata

GRM188B31A225KE33

2.2 µF

0603

10 V

Diodes Inc.

B0540WS

Schottky

SOD-323

40 V/500 mA

ALS1

Avago

APDS-9005

Ambient Light Sensor

1.6 mm x 1.5 mm × 0.6 mm

0 to 1100 Lux

ALS2

Avago

APDS-9005

Ambient Light Sensor

1.6 mm x 1.5 mm × 0.6 mm

0 to 1100 Lux

Submit Documentation Feedback

Product Folder Links: LM3530

LM3530 Datenblatt(PDF) 34 Page - Texas Instruments

LM3530 Datenblatt(HTML) 34 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

Datenblatt Download

Link URL