BF2520

AC/DC TL431 PFM SOT23-6 PSR CS Rs VDD 1 CC/CV AC AC CV CC 5% TL431 1uA VDD OVP LEB UVLO 1 AC/DC PC TV / RCC LED SOT23 6 SOT23 6 2 VDD VC BASE CS FB / / Tj 10 I/O 1 GND P 2 CS I 3 BASE O 4 FB I 5 VC I 6 VDD P -0.3 -0.3 -0.3 -0.3 -0.3 -40 -55 260 30V 7V 7V 7V 7V 150 150 BJT 3 TA=25 VDD=15V VDD IDD ST IDD OP UVLO ON VDD UVLO OFF VDD VDD_MAX VDD VDD_OVP TLEB Vth_ocp Td_oc FB Vref_fb LEB OCP Tpause_min Tpause_max I_comp_cable VDD=11V VDD=15V VDD VDD IDD=10mA 6.0 11.5 25 1 600 12.8 27 3 700 7.6 13.5 25 29 uA uA V V V V 500 ns 480 500 515 mV 100 ns 1.97 2 2.03 V 2 US 8 10 12 MS 42 48 uA Is_max Is_preoff Rdson_l Pre-off 20 0.5 1 40 mA 1.5 mA ohm TL431 PSR CC/CV , LED VDD UVLO AC/DC 600uA / /1 4 CC/CV 1 DCM Is=(Np/Ns) Ip Vaux=(Naux/Ns) (Vo+ V) V 1 2 DCM FB 4 Vref 2 Vref(2V) RS CC CS RS 3 5 3 RS Po max=(1/2)LpFswIp2 Lp Ip 3 Fsw=1/(2Tdemag) Tdemag 4 Ip fsw DCM 3 FB V/Vout=(Icomp_cableX(R1//R2)X10e-6/2)X100% V- R1//R2=3K 6.75% BJT CS VDD Is_max 30mA RC 6 FB CS 10% OCP VDD VDD VDD UVLO ON UVLO 7 ...