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LM2754

PinoutSpecificationsRegulated LEDs4Total LED Current800 mABoost TypeSwitched Capacitor 1.5xSwitching Frequency1000 kHzEfficiency (peak)90 %Input Min Voltage2.8 VoltInput Max Voltage5.5 VoltLED ConfigurationParallelCurrent Matching0.5%OutputMax Voltage3.8 VoltSupply Current8 mASwitching TypeFixed F...

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SeekIC No. : 004395045 Detail

LM2754: PinoutSpecificationsRegulated LEDs4Total LED Current800 mABoost TypeSwitched Capacitor 1.5xSwitching Frequency1000 kHzEfficiency (peak)90 %Input Min Voltage2.8 VoltInput Max Voltage5.5 VoltLED Confi...

LM2754 Data Sheet

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Part Number:
LM2754
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Pinout




Specifications

Regulated LEDs4
Total LED Current800 mA
Boost TypeSwitched Capacitor 1.5x
Switching Frequency1000 kHz
Efficiency (peak)90 %
Input Min Voltage2.8 Volt
Input Max Voltage5.5 Volt
LED ConfigurationParallel
Current Matching0.5%
OutputMax Voltage3.8 Volt
Supply Current8 mA
Switching TypeFixed Freq
PWM BrightCtrlNo
Analog-V BrightCtrlNo
Ambient Light CompensationNo
RGB-LEDNo
Temperature Min-40 deg C
Temperature Max+85 deg C
RegTypeWhiteLED Driver
PowerWiseYes
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Description

The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.

Two external low power resistors set the desired current for Torch and Flash modes. The TX pin allows the device to be forced into Torch mode during a Flash pulse, allowing for synchronization between the RF power amplifier pulse and Flash/Torch modes. To protect the device and Flash LEDs, internal Time-Out circuitry turns off the LM2754 in case of a faulty prolonged Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up.

The LM2754 is available in a small 24-pin thermally enhanced LLP package.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2754SQ CMOS7 0 16561 0 0 954000 4 270700104
LM2754SQX CMOS7 0 16561 0 0 954000 4 270700104

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-1546: Application Note 1546 LM2754 Evaluation Board 927 Kbytes 3-Nov-06 Download
AN-1546 (Chinese): Application Note 1546 LM2754 Evaluation Board
 393 Kbytes   640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">

If you have trouble printing or viewing PDF file(s), see Printing Problems.

More Application Notes

Title Size in Kbytes Date
AN-1269: Application Note 1269 LM2750-5.0 Evaluation Board 233 Kbytes 2-Oct-03 Download
AN-1302: Application Note 1302 LM2750-ADJ Evaluation Board 194 Kbytes 26-Mar-04 Download
AN-1777: Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions 156 Kbytes 27-Feb-08 Download
AN-1777 (Chinese): Application Note 1777 Designing Energy-Efficient Handheld Illumination Solutions
 306 Kbytes   640){this.height=this.height*640/this.width;this.width=640;}' border="0" alt=" Connection Diagram">
AN-1778: Application Note 1778 LM2755 Charge Pump LED Controller with I2C Compatible Interface in SMD ? 4110 Kbytes 30-Apr-08 Download
AN-1779: Application Note 1779 LM2756 Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in SMD 2288 Kbytes 31-Mar-08 Download
AN-1695: Application Note 1695 LM2758 Flash LED Driver Evaluation Board 347 Kbytes 9-Apr-08 Download
AN-1731: Application Note 1731 LM2757 Evaluation Board 573 Kbytes 19-Feb-08 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.




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