LM3519MK-20/NOPB

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Texas Instruments

HIGH FREQUENCY BOOST WHITE LED DRIVER WITH HIGH-SPEED PWM BRIGHTNESS CONTROL

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LM3519MK-20/NOPB

Active

Texas Instruments

HIGH FREQUENCY BOOST WHITE LED DRIVER WITH HIGH-SPEED PWM BRIGHTNESS CONTROL

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Description Specifications Series Pricing CAD Documents

Description

General part information

LM3519 Series

The LM3519 drives up to 4 white LEDs with constant current to provide LCD backlighting in handheld devices. The LED current is internally set to 20mA. The series connection allows the LED current to be identical for uniform brightness and minimizes the number of traces to the LEDs. Brightness control is achieved by applying a PWM signal on enable with frequencies up to 30kHz.

The LM3519 features a proprietary PFM regulation architecture with switching frequencies between 2MHz to 8MHz, minimizing inductor size.

Over-voltage protection circuitry and high frequency operation permit the use of low-cost small output capacitors. During shutdown, the output is disconnected from the input in order to avoid leakage current path through the LEDs to ground.

Technical Specifications

Parameters and characteristics for this part

Specification	LM3519MK-20/NOPB

Applications	Backlight
Current - Output / Channel	20 mA
Dimming	PWM
Frequency	5.4 MHz
Internal Switch(s)	Yes
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package / Case	TSOT-23-6, SOT-23-6 Thin
Package Name	TSOT-23-6
Topology	Step-Up (Boost)
Type	DC DC Regulator
Voltage - Output	20 V
Voltage - Supply (Max)	5.5 V
Voltage - Supply (Min)	2.7 V

LM3519 Series

Part	Voltage - Supply (Max)	Current - Output / Channel	Applications	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Output	Number of Outputs	Type	Package Name	Mounting Type	Dimming	Frequency	Package / Case	Internal Switch(s)	Topology	Voltage - Supply (Min)	Voltage - Input (Minimum)	Voltage - Input (Maximum)	Contents	Total Output Count	Output Type	Non-Isolated Output Count	Features	Utilized IC / Part
Texas Instruments LM3519MKX-20/NOPB	5.5 V	20 mA	Backlight	85 °C	-40 °C	20 V	1	DC DC Regulator	TSOT-23-6	Surface Mount	PWM	5.4 MHz	SOT-23-6 Thin TSOT-23-6	Yes	Step-Up (Boost)	2.7 V
Texas Instruments LM3519MK-20	5.5 V	20 mA	Backlight	85 °C	-40 °C	20 V	1	DC DC Regulator	TSOT-23-6	Surface Mount	PWM	5.4 MHz	SOT-23-6 Thin TSOT-23-6	Yes	Step-Up (Boost)	2.7 V
Texas Instruments LM3519MKEV		20 mA															2.7 V	5.5 V	Board	1	Non-Isolated	1 count	Dimmable	LM3519
Texas Instruments LM3519MKX-20	5.5 V	20 mA	Backlight	85 °C	-40 °C	20 V	1	DC DC Regulator	TSOT-23-6	Surface Mount	PWM	5.4 MHz	SOT-23-6 Thin TSOT-23-6	Yes	Step-Up (Boost)	2.7 V
Texas Instruments LM3519MK-20/NOPB	5.5 V	20 mA	Backlight	85 °C	-40 °C	20 V	1	DC DC Regulator	TSOT-23-6	Surface Mount	PWM	5.4 MHz	SOT-23-6 Thin TSOT-23-6	Yes	Step-Up (Boost)	2.7 V
Texas Instruments LM3519MK-20/NOPB	5.5 V	20 mA	Backlight	85 °C	-40 °C	20 V	1	DC DC Regulator	TSOT-23-6	Surface Mount	PWM	5.4 MHz	SOT-23-6 Thin TSOT-23-6	Yes	Step-Up (Boost)	2.7 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LM3519 High Freq Boost White LED Drvr w/High-Speed PWM Brightness Cntrl datasheet (Rev. B)

AN-1406 LM3519 Evaluation Board (Rev. A)

Common LED Functions and LED Driver Design Considerations