LTC4121/LTC4121-4.2 BLOCK DIAGRAM 4121 F01 R NOM 10k 10k T VCC C INT 2.2µF C BAT 22µF C BST 22nF L SW 22µH R FB1 R FB2 R PROG 3.01k V CC SW BAT FB GND FBG INT BOOST PROG CHGSNS R SNS 0.3Ω V FB(REG) LDO 588k ENABLE V CC + – V CC + – INT C-EA INT V-EA DZ ENABLE V CC INT M V CC Diagram PW INT I TH Block BAT 2.21V IN V CC gm • V MP(OS) 1. INT + – – + K F +V Figure SHUTDOWN T V CC DAC INT ENABLE HOT COLD DISABLE DUVLC LOWBA ENABLE T + – V CC V CC NTC I MPP INT CNTRL INT + – + – + – T MP 9R R 0.9 IN BAT 2.45V IN T T IN-80mV • V LTC4121 IN RUN FREQ FAUL CHRG NTC MPP K F T1 T2 R RUN1 R RUN2 R MPP R MPP IN C IN 10µF • V K R D1 + + + 4121fc 10 For more information www.linear.com/LTC4121 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Applications Examples Package Description Typical Application Related Parts
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