LM3530

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Hocheffizienter LED-Treiber für weiße LEDs mit programmierbarer Umgebungslichtsensoroption

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Datenblatt

document-pdfAcrobat LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. L) (Englisch) PDF | HTML

LM3530

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Number of channels

1

Vin (min) (V)

2.7

Vin (max) (V)

5.5

Vout (min) (V)

0

Vout (max) (V)

40

Type

Inductive

Switching frequency (max) (kHz)

500

Duty cycle (max) (%)

94

LED current per channel (mA)

30

Peak efficiency (%)

88

Topology

Boost

Features

I2C control

Operating temperature range (°C)

-30 to 85

Rating

Catalog

Number of channels

1

Vin (min) (V)

2.7

Vin (max) (V)

5.5

Vout (min) (V)

0

Vout (max) (V)

40

Type

Inductive

Switching frequency (max) (kHz)

500

Duty cycle (max) (%)

94

LED current per channel (mA)

30

Peak efficiency (%)

88

Topology

Boost

Features

I2C control

Operating temperature range (°C)

-30 to 85

Rating

Catalog

DSBGA (YFQ)

12

2.52000000000000018 mm² 1.8 x 1.4000000000000001

DSBGA (YFZ)

12

2.52000000000000018 mm² 1.8 x 1.4000000000000001

Drives up to 11 LEDs in series
1000:1 Dimming Ratio
90% Efficient
Programmable Dual Ambient Light Sensor Inputs
with Internal ALS Voltage Setting Resistors
I²C Programmable Logarithmic or
Linear Brightness Control
External PWM Input for Simple Brightness
Adjustment
True Shutdown Isolation for LEDs and Ambient
Light Sensors
Internal Soft-Start Limits Inrush Current
Wide 2.7-V to 5.5-V Input Voltage Range
40-V and 25-V Overvoltage Protection Options
500-kHz Fixed Frequency Operation
839-mA Peak Current Limit

Drives up to 11 LEDs in series
1000:1 Dimming Ratio
90% Efficient
Programmable Dual Ambient Light Sensor Inputs
with Internal ALS Voltage Setting Resistors
I²C Programmable Logarithmic or
Linear Brightness Control
External PWM Input for Simple Brightness
Adjustment
True Shutdown Isolation for LEDs and Ambient
Light Sensors
Internal Soft-Start Limits Inrush Current
Wide 2.7-V to 5.5-V Input Voltage Range
40-V and 25-V Overvoltage Protection Options
500-kHz Fixed Frequency Operation
839-mA Peak Current Limit

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I²C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.

The LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LEDs. The 839-mA current limit and 2.7-V to 5.5-V input voltage range make the device a versatile backlight power source ideal for operation in portable applications.

The LED current is adjustable from 0 mA to 29.5 mA via an I²C-compatible interface. The 127 different current steps and 8 different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input.

The device also features two Ambient Light Sensor inputs. These are designed to monitor analog output ambient light sensors and provide programmable adjustment of the LED current with changes in ambient light. Each ambient light sensor input has independently programmable internal voltage setting resistors which can be made high impedance to reduce power during shutdown. The 500-kHz switching frequency allows for high converter efficiency over a wide output voltage range accommodating from 2 to 11 series LEDs. Finally, the support of Content Adjusted Backlighting maximizes battery life while maintaining display image quality.

The LM3530 operates over the −40°C to 85°C temperature range.

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Alle anzeigen 7

	Typ	Titel		Datum
*	Data sheet	LM3530 High-Efficiency White-LED Driver with Programmable Ambient Light Sensing Capability and I2C-Compatible Interface datasheet (Rev. L)	PDF \| HTML	23 Dez 2014
	White paper	Common LED Functions and LED Driver Design Considerations		21 Sep 2020
	Selection guide	Power Management Guide 2018 (Rev. R)		25 Jun 2018
	Application note	Analog PWM Dimming in White-LED Drivers		21 Dez 2016
	Application note	Inductor Selection in Boost Converters for LCD Backlight Applications		24 Okt 2016
	Application note	Schottky Diode Selection in Asynchronous Boost Converters		06 Sep 2016
	User guide	AN-1991 LM3530 Evaluation Kit (Rev. A)		30 Apr 2013

Design und Entwicklung

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Treiber oder Bibliothek

LM3530SW-LINUX — Linux-Treiber für LM3530

The Linux driver supports the LM3530 White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

lm3530

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DSBGA (YFQ)	12	Ultra Librarian
DSBGA (YFZ)	12	Ultra Librarian

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LM3530

Hocheffizienter LED-Treiber für weiße LEDs mit programmierbarer Umgebungslichtsensoroption

LM3530

Produktdetails

Technische Dokumentation

Design und Entwicklung

LM3530SW-LINUX — Linux-Treiber für LM3530

Linux Mainline Status

Supported Devices:

Linux Source Files

SNVC045 — LM3530 Graphical User Interface

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