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LM3424MH/NOPB

Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs 20-HTSSOP -40 to 125

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Price Range $1.9500 / $3.2370

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Distributors with Stock

Part Number Description Manufacturer Compare
LM3424MH Drivers And Interfaces LED DISPLAY DRIVER, PDSO20, TSSOP-20 Texas Instruments LM3424MH/NOPB vs LM3424MH
LM3424MH/NOPB Drivers And Interfaces Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs 20-HTSSOP -40 to 125 Texas Instruments LM3424MH/NOPB vs LM3424MH/NOPB
Part Number Description Manufacturer Compare
LM3424MH Drivers And Interfaces LED DISPLAY DRIVER, PDSO20, TSSOP-20 Texas Instruments LM3424MH/NOPB vs LM3424MH
LM3424MH/NOPB Drivers And Interfaces Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs 20-HTSSOP -40 to 125 Texas Instruments LM3424MH/NOPB vs LM3424MH/NOPB

Global Popularity

Popularity in Drivers And Interfaces

Popularity in Display Drivers

Popularity by Region

Very High

Medium

Good

Low

  • 1. Latvia
    100
  • 2. Malawi
    97
  • 3. Mexico
    96
  • 4. MDV
    95
  • 5. Vietnam
    94
  • 6. China
    94
  • 7. South Africa
    93
  • 8. Greece
    93
  • 9. Sweden
    93
  • 10. Egypt
    93

Estimated Price History

Estimated Stock History

Market Price Analysis

No data available
  • 1. Rochester Electronics $1.9500 Buy Now
  • 2. Texas Instruments $2.8900 Buy Now
  • 3. RS Components $3.2370 Buy Now

Datasheets & Reference Designs

Reference Designs

  • AMBIENTLIGHTADAPTIVELED-REF Ambient Light Adaptive LED Driver | TI.com
    AMBIENTLIGHTADAPTIVELED-REF: The ambient light adaptive LED driver automatically adjusts display brightness for changing ambient light conditions, providing a more viewable display with better contrast. The design drives five series connected LEDs from an input voltage of 4.5V to 12V. The LED current is nominally 100mA and the output voltage is 15 to 20V. The heart of the design is National’s PowerWise® LM3423 LED driver which has all the features needed to implement a boost converter with output current regulation and PWM dimming of the current. The LM3423 achieves output current regulation by sensing and appropriately adjusting the voltage across a resistor connected in series with the LED string. Dimming or brightening the backlight of a display in response to ambient light condition can greatly increase the life of batteries in portable devices, and improves the visibility of the display under different viewing conditions. In this design a photodiode circuit is used to measure ambient light and provide a signal for dimming the LEDs. PWM dimming is the preferred method of dimming because it allows the light’s color temperature to remain constant irrespective of its intensity. PWM dimming is done by keeping the amplitude of the LED current constant, but periodically turning the LED driver on and off, thus varying the LEDs’ average current and light intensity. The switching is at done at a low frequency, but one which is high enough for the human eye to sense only changes in the light’s average intensity. Linear dimming, where the amplitude of the current in the LEDs is modulated, is not suitable because the LEDs’ light color temperature is sensitive to the current’s amplitude. The dimming range of the average LED current is from 20 to nearly 100% percent of its nominal value as ambient light conditions increase from dark to bright. To reduce power consumption and prolong battery life the output current is clamped to no more than 50% of the nominal value when the input (battery) voltage falls below a predetermined level.
  • Ambient Light Adaptive LED Driver
    AMBIENTLIGHTADAPTIVELED-REF: The ambient light adaptive LED driver automatically adjusts display brightness for changing ambient light conditions, providing a more viewable display with better contrast. The design drives five series connected LEDs from an input voltage of 4.5V to 12V. The LED current is nominally 100mA and the output voltage is 15 to 20V. The heart of the design is National’s PowerWise® LM3423 LED driver which has all the features needed to implement a boost converter with output current regulation and PWM dimming of the current. The LM3423 achieves output current regulation by sensing and appropriately adjusting the voltage across a resistor connected in series with the LED string. Dimming or brightening the backlight of a display in response to ambient light condition can greatly increase the life of batteries in portable devices, and improves the visibility of the display under different viewing conditions. In this design a photodiode circuit is used to measure ambient light and provide a signal for dimming the LEDs. PWM dimming is the preferred method of dimming because it allows the light’s color temperature to remain constant irrespective of its intensity. PWM dimming is done by keeping the amplitude of the LED current constant, but periodically turning the LED driver on and off, thus varying the LEDs’ average current and light intensity. The switching is at done at a low frequency, but one which is high enough for the human eye to sense only changes in the light’s average intensity. Linear dimming, where the amplitude of the current in the LEDs is modulated, is not suitable because the LEDs’ light color temperature is sensitive to the current’s amplitude. The dimming range of the average LED current is from 20 to nearly 100% percent of its nominal value as ambient light conditions increase from dark to bright. To reduce power consumption and prolong battery life the output current is clamped to no more than 50% of the nominal value when the input (battery) voltage falls below a predetermined level.
  • 6V-33V input to 16.7V output@1.75A, Buck Boost Converter
    PMP7759: It is a Buck Boost configuration where input ranges from 6V to 33V DC. The output has 5 LEDs in the string producing 16.7V in the output. It uses NTC for thermal shutdown thereby protecting the circuit in case of high temperature issues. It can be used in Indoor and Outdoor area SSL, Automotive, General illumination etc.
  • PMP7759 6V-33V input to 16.7V output@1.75A, Buck Boost Converter | TI.com
    PMP7759: It is a Buck Boost configuration where input ranges from 6V to 33V DC. The output has 5 LEDs in the string producing 16.7V in the output. It uses NTC for thermal shutdown thereby protecting the circuit in case of high temperature issues. It can be used in Indoor and Outdoor area SSL, Automotive, General illumination etc.

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