1 shantou huashan electronic devices co.,ltd . ? description the h7812 a series of three terminal positive regulators are available in the to - 220 package and with several fixed output voltages, making them useful in a wide range of applications . each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. if adequate heat sinking is provided, they can deliver over 1a output current. although designed primarily as fixed v oltage regulator, these devices can be used with external components to obtain adjustable voltages and currents. ? features ? absolute maximum ratings ? t a =25 ?? ? v i ?a?a input voltage ( for v o =5 v to 18v) ?-?-?-?-?-?- 35v r | jc ?a?a thermal resistance junction - cases ?-?-?-?- 5 ?? /w r | j a ?a?a thermal resistance junction - air ?-?-?-?- 65 ?? /w t opr ?a?a operating temperature range ?-?-?-?-?- 0~125 ?? t stg ?a?a storage temperature range ?-?-?-?-?- - 65~150 ?? 1 d input 2 d gnd 3 d output l output current up to 1a l output voltages of 12v l thermal overload protection l short circuit protection l output transistor safe o perating area protection to - 2 20 3 - terminal fixed voltage regulator h 7812a
2 shantou huashan electronic devices co.,ltd . ? refer to test circuit, unless otherwise specified ? 0 ??? t j ? 125 ?? ,i o =500ma, v i =1 9 v ,c i =0.33 | f ,c o =0.1 | f ? symbol parameter min. typ. max. unit cond itions 11.5 12 12.5 t j = 25 ?? v o output voltage 11.4 12 12.6 v 5 .o ma ? i o ? 1. 0a, p d ? 15w, 14.5v ? v i ? 27v 10 12 0 t j = 25 ?? , 14.5v ? v i ? 27 v | v o line regulation (note1) 3.0 6 0 m v t j = 25 ?? , 16v ? v i ? 22v 12 100 t j = 25 ?? , 5.0 ma ? i o ? 1 .5 a | v o load regulation (note1) 5.0 5 0 m v t j = 25 ?? , 250 ma ? i o ? 750 ma i q quiescent current 5.1 8 ma t j = 25 ?? 0.5 5 ma ? i o ? 1 .0 a | i q quiescent current change 0.8 m a 14v ? v i ? 27 v | v o / | t output voltage drift - 1 m v/ ?? i o =5ma v n output noise voltage 76 | v t a = 25 ?? , 10hz ? f ? 10 0 khz r r rippl e rejection 55 71 db f=120hz , 15v ? v i ? 25v v d dropout voltage 2 v i o =1a, t j = 25 ?? r o output resistance 18 m |? f=1 k hz i sc short circuit current 230 ma v i = 35v , t a = 25 ?? i pk peak current 2.2 a t j = 25 ?? h 7812a
3 shantou huashan electronic devices co. ,ltd . ? ? 1 ? 4 ? 2 ? 3 ? 5 ? 6 ? h 7812a
4 shantou huashan electronic devices co.,ltd . 7 ? 8 ? 9 ? 10 ? 11 ? 13 ? 12 ? h 7812a
5 shantou huashan electronic devices co.,ltd . h 7812a
|
