LM3519 Selling Leads, Price trend, LM3519 DataSheet download, circuit diagram from SeekIC.com

PinoutSpecificationsRegulated LEDs4Boost TypeInductiveSwitching Frequency2000 kHzEfficiency (peak)80 %Input Min Voltage2.7 VoltInput Max Voltage5.5 VoltOutputMax Voltage18.9 VoltSpecial FeaturesUp to 30kHz PWM dimming outputPWM BrightCtrlNoAnalog-V BrightCtrlNoAmbient Light CompensationNoRGB-LEDNo...

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SeekIC No. : 004395367 Detail

LM3519: PinoutSpecificationsRegulated LEDs4Boost TypeInductiveSwitching Frequency2000 kHzEfficiency (peak)80 %Input Min Voltage2.7 VoltInput Max Voltage5.5 VoltOutputMax Voltage18.9 VoltSpecial FeaturesUp t...

LM3519 Data Sheet

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Part Number:: LM3519
Supply Ability:: 5000

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1~5000

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Product Details

Description

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Specifications

Regulated LEDs	4
Boost Type	Inductive
Switching Frequency	2000 kHz
Efficiency (peak)	80 %
Input Min Voltage	2.7 Volt
Input Max Voltage	5.5 Volt
OutputMax Voltage	18.9 Volt
Special Features	Up to 30kHz PWM dimming output
PWM BrightCtrl	No
Analog-V BrightCtrl	No
Ambient Light Compensation	No
RGB-LED	No
Temperature Min	-40 deg C
Temperature Max	85 deg C
RegType	Switching Regulator
PowerWise	Yes
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Description

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.

The LM3519 is available in a tiny 6-pin SOT23 package.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM3519MK-20	ABCD150	0	31520	0	0	3739000	1	1060951459
LM3519MKX-20	ABCD150	0	31520	0	0	3739000	1	1060951459

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

Application Notes

Title	Size in Kbytes	Date
AN-1406: Application Note 1406 LM3519 Evaluation Board	653 Kbytes	17-Feb-06	Download

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More Application Notes

Title	Size in Kbytes	Date
AN-D: Application Note D Versatile Monolithic V/Fs can Compute as Well as Convert with High Accuracy	248 Kbytes	3-Oct-02	Download

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LM3519

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