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LTC3217


Part Number LTC3217
Manufacturer Linear Technology
Title 600mA Low Noise Multi-LED Camera Light Charge Pump
Description The LTC®3217 is a low noise charge pump DC/DC converter designed to power four high current LEDs. The LTC3217 requires only four small ceramic cap...
Features n Charge Pump Provides High Efficiency with Automatic Mode Switching n Multimode Operation: 1x, 1.5x, 2x n Four Low Dropout LED Outputs n Up to 600mA Total Output Current n Independent Torch and Flash ISET and Enable Pins n Low Noise Constant Frequency Operation* n PWM Brightness Control via the EN2 ...

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LTC3210 : The LTC®3210 is a low noise charge pump DC/DC converter designed to drive four MAIN LEDs and one high current CAM LED for camera lighting. The LTC3210 requires only four small ceramic capacitors and two current set resistors to form a complete LED power supply and current controller. Built-in soft-start circuitry prevents excessive inrush current during start-up and mode changes. High switching frequency enables the use of small external capacitors. Independent MAIN and CAM full-scale current settings are programmed by two external resistors. Shutdown mode and current output levels are selected via two logic inputs. The full-scale current through the LEDs is programmed via external resistors.

LTC3210-1 : n Low Noise Charge Pump Provides High Efficiency with Automatic Mode Switching n Multimode Operation: 1x, 1.5x, 2x n Individual Full-Scale Current Set Resistors n Up to 500mA Total Output Current n Single Wire EN/Brightness Control for MAIN and CAM LEDs n 64:1 Linear Brightness Control Range for MAIN Display n Four 25mA Low Dropout MAIN LED Outputs n One 400mA Low Dropout CAM LED Output n Low Noise Constant-Frequency Operation n Low Shutdown Current: 3µA n Internal Soft-Start Limits Inrush Current During Startup and Mode Switching n Open/Short LED Protection n No Inductors n 3mm × 3mm × 0.75mm 16-Lead Plastic QFN Package Applications n Multi-LED Light Supply for Cell Phones/DSCs/PDAs L, LT,.

LTC3210-2 : n Low Noise Charge Pump Provides High Efficiency with Automatic Mode Switching n Multimode Operation: 1x, 1.5x, 2x n Individual Full-Scale Current Set Resistors n Up to 500mA Total Output Current n Single Wire EN/Brightness Control for MAIN and CAM LEDs n 32:1 Linear Brightness Control Range for MAIN Display n Three or Four 25mA Low Dropout MAIN LED Outputs n One 400mA Low Dropout CAM LED Output n Low Noise Constant Frequency Operation* n Low Shutdown Current: 3µA n Internal Soft-Start Limits Inrush Current During Startup and Mode Switching n Open/Short LED Protection n No Inductors n 3mm × 3mm 16-Lead Plastic QFN Package Applications n Multi-LED Light Supply for Cellphones/DSCs/PDAs L, LT,.

LTC3210-3 : n Low Noise Charge Pump Provides High Efficiency with Automatic Mode Switching n Multimode Operation: 1x, 1.5x, 2x n Individual Full-Scale Current Set Resistors n Up to 500mA Total Output Current n Single Wire EN/Brightness Control for MAIN and CAM LEDs n 32:1 Linear Brightness Control Range for MAIN Display n Three or Four 25mA Low Dropout MAIN LED Outputs n One 400mA Low Dropout CAM LED Output n Low Noise Constant Frequency Operation* n Low Shutdown Current: 3µA n Internal Soft-Start Limits Inrush Current During Startup and Mode Switching n Open/Short LED Protection n No Inductors n 3mm × 3mm 16-Lead Plastic QFN Package Applications n Multi-LED Light Supply for Cellphones/DSCs/PDAs L, LT,.

LTC3212 : The LTC®3212 is a low noise charge pump RGB LED driver capable of driving three LEDs up to 25mA each from a 2.7V to 5.5V input. Low external part count (one flying capacitor, two bypass capacitors and one to three programming resistors) makes the LTC3212 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching. High switching frequency enables the use of small external capacitors. The charge pump shuts down to a high impedance mode to prevent LED leakage while the LTC3212 is off. Each LED may be individually turned on or off via a single pin interface. The current through the LEDs may be individ.

LTC3214 : The LTC®3214 is a low noise, high current charge pump DC/DC converter capable of driving high current LEDs at up to 500mA from a 2.9V to 4.5V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors at VIN and CPO) make the LTC3214 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. Output current level is programmed by an external resistor. LED current is regulated using an internal 110mΩ sense resistor. Automatic mode switching optimizes efficiency by monitoring the voltage across the char.

LTC3215 : The LTC®3215 is a low noise, high current charge pump DC/DC converter designed to power high current LEDs. The part includes an accurate programmable current source capable of driving loads up to 700mA from a 2.9V to 4.4V input. Low external parts count (two flying capacitors, one programming resistor and two bypass capacitors) makes the LTC3215 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. LED current is programmed with an external resistor. The LED is disconnected from VIN during shutdown. An ultralow dropout current source mainta.

LTC3216 : n High Efficiency Operation: 1x, 1.5x or 2x Boost Modes with Automatic Mode Switching n Ultralow Dropout ILED Current Control n Output Current up to 1A n Low Noise Constant Frequency Operation n Independent Low Current/High Current Programming and Enable Pins n Wide VIN Range: 2.9V to 4.4V n Open/Shorted LED Protection n LED Disconnect in Shutdown n Low Shutdown Current: 2.5μA n 4% LED Current Programming Accuracy n Automatic Soft-Start Limits Inrush Current n No Inductors n Tiny Application Circuit (All Components 1mm Profile) n 3mm × 4mm 12-Lead DFN Package APPLICATIONS n LED Torch/Camera Light Supply for Cell Phones, PDAs and Digital Cameras n Generic Lighting and/or Flash/Strobe Applicat.

LTC3218 : The LTC®3218 is a low-noise, high-current charge pump DC/DC converter capable of driving high current LEDs at up to 400mA from a 2.9V to 4.5V input. A low external parts count (one flying capacitor, two programming resistors and two bypass capacitors at VIN and CPO) make the LTC3218 ideally suited for small, battery-powered applications. Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. A built-in 2-second timer protects the LED during flash mode. Output current level is programmed by an external resistor. LED current is regulated using an internal high side 220mΩ sense resistor. Automatic mod.

LTC3219 : The LTC®3219 is a highly integrated multidisplay LED driver. The device contains a high efficiency, low noise charge pump to provide power to nine universal LED current sources. The LTC3219 requires only five small ceramic capacitors to form a complete LED power supply and current controller. The maximum display currents are set by an internal precision current reference. Independent dimming, On/Off, blinking and gradation control for all current sources is achieved via the I2C serial interface. 6-bit linear DACs are available for adjusting brightness levels for each universal LED current source. The LTC3219 charge pump optimizes efficiency based on the voltage across the LED current sources. T.




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