LT1932

• Product Introduction

LT1932 constant current ThinSOT package DC/DC LED driver

peculiarity

• Up to 80% Efficiency
• Inherently Matched LED Current
• Drives Five White LEDs from 2V
• Drives Six White LEDs from 2.7V to drive 6 white LEDs from 2.7V
• Drives Eight White LEDs from 3V
• Adjustable Control of LED Current Adjustable LED current control
• Disconnects LEDs In Shutdown
• 1.2MHz Fixed Frequency Switching 1.2MHz Fixed Frequency Switching
• Uses Tiny Ceramic Capacitors use small ceramic capacitors
• Uses Tiny 1mm-Tall Inductors with miniature 1MM-high-rise inductors
• Regulates Current Even When V IN > V OUTThe regulates the current OUT IN> V
• Operates with V IN as Low as 1V and V operating voltages as low as 1V
• Low Profile (1mm) ThinSOT™ Package Low profile (1mm) is available in a ThinSOT™ package
• 描述 The LT®1932 is a fixed frequency step-up DC/DC converter designed to operate as a constant-current source. ®LT 1932 is a fixed-frequency boost DC/DC converter designed to work as a constant current source. Because it directly regulates output current, the LT1932 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the Because it directly regulates the output current, the LT1932 is ideal for driving light-emitting diodes (LEDs) that are proportional to the light intensity through them and through their current rather than at their terminal voltage.

  With an input voltage range of 1V to 10V, the device works from a variety of input sources. With an input voltage range of 1V to 10V, the device can be selected from a variety of input sources. The LT1932 accurately regulates LED current even when the input voltage is higher than the LED voltage, greatly simplifying battery-powered designs. The LT1932 accurately regulates LED current, even when the input voltage is higher than the LED, greatly simplifying battery-powered design. A single external resistor sets LED current between 5mA and 40mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal. A single external resistor sets the current of the LED to 5mA and the current is 40mA, It can then be easily adjusted using a DC voltage or pulse width modulation (PWM) signal. When the LT1932 is placed in shutdown, the LEDs are disconnected from the output, ensuring a quiescent current of under 1µA for the entire circuit. The LT1932 is placed on shutdown with the output of the LED disconnected to ensure 1μA quiescent current across the circuit. The device's 1.2MHz switching frequency permits the use of tiny, low profile chip inductors and capacitors to minimize footprint and cost in space-conscious portable The device's 1.2MHz switching frequency allows for the use of slim, low-profile chip inductors and capacitors to minimize footprint-sensitive portable applications and costs.

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  • Cellular Telephones
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  • Portable MP3 Players
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