TK11892 DCDC Converter, 1ch, Step-up, Inductive DCDC1ch Feature Built-in three modes 3 - LED dimming and shutdown mode - Wide operating voltage range (2.65 to 8.0V) : 2.65V to 8.0V 2.0MHz operation 2MHz Internal switching transistor (max 1.0A) Maximum duty cycle 90% 90% Very small inductor available Very small package, SON3024-8 0.75mmSON3024-8 Operating Voltage Range VOP=2.65 to 8.0V VOP=2.65~8.0V Operating Temp. Range TOP=-30 to +85C TOP=-30~+85C PD=600mW Power Dissipation PD=600mW Characteristics Part Name TK11892 Number of Current Stabilizer - fOSC Number of LED in serial connection 2 to 4 LED 2.0MHz ILED Max 100mA Ordering Guide, Marking Part Name TK11892 Ordering Name Marking TK11892FTL-GH Description Order Size TK11892: Part Name 3,000 F: SON3024-8 Package pcs. TL: Tape&Reel, Left /Reel -GH: PB-Free&Halogen Free AB2 LOT Block Diagram, Standard Application VIN Oscillator 1 PWM Comp Referrence Voltage GND 7 VFB1 4 VFB2 5 3.3H 8 TK11892F SW Output Drive Control VIN 1 CIN 2 Open Circuit Protection Over Current Detector 3 6 4 EAOUT SW VIN CONT1 GND CONT2 EA.OUT VFB1 VFB2 Error Amp 1 SW1 Error Amp 2 SW2 Page 132 RLED2 2 CONT1 3 CONT2 8 7 SBD 6 5 COUT CEA 0.1F 2.2F ILED 3.3 Control Circuit RLED1 3.3 2010 AUTUMN