Preliminary Datasheet LP3360 4-Channel Constant Current White LED Driver General Description The LP3360 is a low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. It supports 4 white LEDs with regulated constant current for uniform intensity. The LP3360 maintains low dropout current regulators. The LP3360 requires a 45mV dropout at a 20mA load on each output to match the LED brightness. The brightness of LEDs can be tuned through a pulse width modulated signal at the PWM pin,the PWM frequency from 200Hz to 10KHz and the Duty from 0 to 100%. The LP3360 is available in a SOT23-6 or MSOP-8 package. Features 2.7V to 6V Input Voltage 20mA maxim sink current PWM tuned LED brightness through PWM pin Soft Start Function Built-in Thermal Protection IQ<1uA in Shutdown SOT23-6 or MSOP-8 Package RoHS Compliant and 100% Lead (Pb)-Free Typical Application Circuit 3 D1 4 D2 5 D3 D4 6 Vin PWM Order Information LP3360 - LP3360 2 1 GND PW M □ □ □ F: Pb-Free Package Type B6: SOT23-6 MS:MSOP-8 Marking Information Please see website. Applications LCD Panel Cellular and Smart mobile phone PDA/DSC PMP LP3360 – Ver. 1.2 Datasheet Feb.-2008 Page 1 of 6 Preliminary Datasheet LP3360 Functional Pin Description P a c k a g e Ty p e Pin Configurations SOT23-6 PIN NAME DESCRIPTION SOT23-6 MSOP-8 1 2 2 1,4 3 5 LED4 LED 1 cathode terminal 4 6 LED3 LED2 cathode terminal 5 7 LED2 LED3 cathode terminal 6 8 LED1 LED3 cathode terminal 3 VDD Power Supply PWM/EN MSOP-8 Device enable (active high). GND/PGND Ground Function Block Diagram LP3360 – Ver. 1.2 Datasheet Feb.-2008 Page 2 of 6 Preliminary Datasheet Absolute Maximum Ratings LP3360 Input Voltage to GND (VINA, VINB) ---------------------------------------------------------------------------- 6V EN/ISET to GND Voltage (Ven/set) ----------------------------------------------------------- 0.3V to Vin+0.3V Maximum DC Output Current(Iout) ----------------------------------------------------------------------- 150mA Operating Junction Temperature Range (TJ) ---------------------------------------------------- 40℃ to 150℃ Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 300℃ Thermal Information Maximum Power Dissipation (PD) SOT23-6 -------------------------------------------------------------- 0.25W Maximum Power Dissipation (PD) MSOP-8 -------------------------------------------------------------- 1.25W Thermal Resistance (JA) ------------------------------------------------------------------------------------ 50℃/W Electrical Characteristics (Over recommended operating conditions unless specified otherwise) VINA =3.6V,EN=High, TA=25℃ ) Parameter Symbol Conditions Min. 3 0.6 VOUT Input Voltage Output Voltage Range IQ Quiescent Current No Load,1X mode ISHDN ILED-ERR Shutdown Current ENB = GND LED Current Accuracy 3mA< ILED<30mA 19 ILED-LED-ERR LED Channel Matching Any two channel mismatch -3 VEN(L) Enable Threshold Low VEN(H) Enable Threshold High VIN LP3360 – Ver. 1.2 Datasheet Feb.-2008 LP3360 Typ. Max. 5.5 Unit V V VINB 350 uA 0.1 1 µA 20 21 mA 3 % 0.5 V 260 2 V Page 3 of 6 Preliminary Datasheet LP3360 Typical Operating Characteristics LP3360 – Ver. 1.2 Datasheet Feb.-2008 Page 4 of 6 Preliminary Datasheet LP3360 Packaging Information LP3360 – Ver. 1.2 Datasheet Feb.-2008 Page 5 of 6 Preliminary Datasheet LP3360 – Ver. 1.2 Datasheet Feb.-2008 LP3360 Page 6 of 6