PT2208 primary side cc/cv regulator china resources powtech (shanghai) co. ltd www.crpowtech.com page 1 PT2208_dsb rev en1.0 general description the PT2208 is a high performance ac/dc power supply controller which inte grates a 730v power switch. PT2208 is targeted to 5-7w designed for flyback topology, and regulates output current/voltage without the secondary feedback loop. the ultra-low operating current at light load ensures that the PT2208 is ideal for applications targeting the newest regulatory standards for average efficiency and standby power. the PT2208 integrates lin e and primary inductance compensation and ensures output current free of line voltage and primary inductance variation. the output cable compensation is intergrated. the output regulation can be controlled within 3% using proprietary compensation technology. the PT2208 integrated hv mos and cycle by cycle current limit, vdd uv protection , ovp protection and voltage clamp to improve reliability. the PT2208 is available in a sop8 package. features z high constant current/voltage accuracy (+/-3%) z frequency jittering(+/-4%) z integrated primary in ductance compensation z internal output cable c compensation z leading edge blanking function z high voltage startup circuit z cycle by cycle current limit z vdd ovp protection z standby power less than 120mw@220vac z output short protection applications z ac/dc led lighting z ac-dc rcc chargers replacement z power adapters and battery chargers z standby and auxiliary suppliers ordering information package temperature range ordering part number transport media marking sop8 -20 ? c to +85 ? c PT2208esoh 2500 tape and reel PT2208 xxxxxx note: xxxxx x typical application circuit . lot number assembly factory code emi filter ac 4 3 2 1 5 6 7 8 gnd drain cs fb comp drain gnd PT2208 vdd
PT2208 primary side cc/cv regulator china resources powtech (shanghai) co. ltd www.crpowtech.com page 2 PT2208_dsb rev en1.0 pin assignment pin descriptions pin no. pin names description 1 cs primary winding current sensing pin 2 fb voltage feedback 3 comp compensation pin for constant voltage control loop 4 vdd power supply. 5 gnd ground 6 gnd ground 7 drain this pin is connected with an internal power switch drain . 8 drain this pin is connected with an internal power switch drain . absolute maximum ratings (note1) sym parameter value unit v ds(max) drain max voltage -0.3~730 v vdd ic supply voltage -0.3~34 v i dd _ clamp v dd dc clamp current 10 ma v fb fb pin voltage range -0.3~7 v v comp comp pin voltage range -0.3~7 v v cs cs pin voltage range -0.3~7 v t a operating temp. range -20 to 85 t stg storage temp. range -40 to 150 r ja sop8 65 /w hbm esd capability, hbm note2 4000 v 8 drain comp cs fb gnd gnd drain 7 6 5 1 2 3 4 sop8 PT2208 vdd
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