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SP1821 Datasheet(PDF) 1 Page - SYNC POWER Crop. |
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SP1821 Datasheet(HTML) 1 Page - SYNC POWER Crop. |
1 / 7 page 2010/04/10 Ver.2 Page 1 SP1821 Four Channels Constant Current LED Driver DESCRIPTION APPLICATIONS The SP1821 is a linear constant current driver designed to drive multiple LEDs in series from a high input voltage rail. The driver acts as a high current matched, four-channel current source ensuring constant LED current for a range of input voltages. The device can drive up to 25mA load current per string with an external resistor. The SP1821 can provide lowest cost for various applications. Internal thermal protection automatically turns off LED current to prevent overheating. The dimming can be achieved by controlling the ISET input or by feeding a PWM signal to the EN pin. The device can be shut down by setting Enable low. MR16 and other decoration light source General reading lighting Display Backlight 12V Battery powered devices FEATURES PIN CONFIGURATION(SOP – 8P) PART MARKING Low Cost LED Driver Constant Current Output Four Channels LED Driver Provides Matching LED Current Low Quiescent Current Disconnects LEDs in Shutdown Mode Thermal Shut Down Protection Current Adjustable via external resistor Dimming Control thru either Enable or Iset |
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