SP1820

SP1820 Four Channels Constant Current LED Driver DESCRIPTION The SP1820 is a four channels constant current driver white LED. The device can drive up to 20mA load current per channel from single cell Lithium Ion battery. SP1820 can provide lowest cost LED driver for various applications. It does not require any external components. Internal thermal protection automatically adjusts LED current to prevent overheating. The dimming control can be achieved by feeding a PWM or analog signal into the Iset pin. The device can be shut down by Enable low. APPLICATIONS z Battery Powered Devices z Digital Camera z PDA, MP3/4 z GPS z Mobile Phone z Keyboard/Display Backlight FEATURES z Low Cost LED Driver z Constant Current Output z Four Channels LED Driver Provides Matching LED Current z Low Quiescent Current z Disconnects LEDs in Shutdown Mode z Thermal Shut Down Protection z Current Adjustable via external resistor z Dimming Control thru either Enable or Iset PIN CONFIGURATION(SOP – 8P) PART MARKING 2009/04/20 Ver.2 Page 1 SP1820 Four Channels Constant Current LED Driver TYPICAL APPLCATION CIRCUIT PIN DESCRIPTION Pin 1 2 3 4 5 6 7 8 Symbol VCC GND EN ISET LED1 LED2 LED3 LED4 Description Supply Voltage Input Ground High Enable Pin Current Set Input LED 1 LED 2 LED 3 LED 4 ORDERING INFORMATION Part Number SP1820S8RGB Package SOP- 8P Part Marking SP1820 ※ SP1820S8RGB : 13” Tape Reel ; Pb – Free ; Halogen – Free 2009/04/20 Ver.2 Page 2 SP1820 Four Channels Constant Current LE...