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| 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 Vin 6 5 4 D2 GND 3 LP3360 D4 D3 PW M 1 PWM Order Information LP3360 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 2 Page 1 of 6 D1 Preliminary Datasheet Functional Pin Description P a c k a g e Ty p e Pin Configurations LP3360 SOT23-6 MSOP-8 PIN NAME DESCRIPTION SOT23-6 1 2 3 4 5 6 MSOP-8 2 1,4 5 6 7 8 3 PWM/EN LED4 LED3 LED2 LED1 VDD Device enable (active high). LED 1 cathode terminal LED2 cathode terminal LED3 cathode terminal LED3 cathode terminal Power Supply 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 ) Symbol VIN VOUT IQ ISHDN ILED-ERR ILED-LED-ERR VEN(L) VEN(H) Parameter Input Voltage Output Voltage Range Quiescent Current Shutdown Current LED Current Accuracy LED Channel Matching Enable Threshold Low Enable Threshold High Conditions Min. 3 0.6 LP3360 Typ. Max. 5.5 VINB 350 1 21 3 0.5 Unit V V uA A mA % V V No Load,1X mode ENB = GND 3mA< ILED<30mA Any two channel mismatch 19 -3 2 260 0.1 20 LP3360 - Ver. 1.2 Datasheet Feb.-2008 Page 3 of 6 Preliminary Datasheet Typical Operating Characteristics LP3360 LP3360 - Ver. 1.2 Datasheet Feb.-2008 Page 4 of 6 Preliminary Datasheet Packaging Information LP3360 LP3360 - Ver. 1.2 Datasheet Feb.-2008 Page 5 of 6 Preliminary Datasheet LP3360 LP3360 - Ver. 1.2 Datasheet Feb.-2008 Page 6 of 6 |
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