40 ics 1-1-3 dc/dc converter ics lineup part number SI-8008TFE si-8050tfe v o (v) variable (0.8 to 24) 5 i o (a) 1.5 absolute maximum ratings unit v w c c c/w c/w ratings 43 17.8 (with infinite heatsink) 14.2 (with infinite heatsink) 2.15 (without heat sink, standalone operation) 1.72 (without heatsink, standalone operation) ?0 to +150 ?0 to +150 7 58 symbol v in p d1-1 p d1-2 p d2-1 p d2-2 t j t stg j-c j-a parameter dc input voltage power dissipation junction temperature* storage temperature thermal resistance (junction to case) thermal resistance (junction to ambient air) recommended operating conditions features compact full-mold package (equivalent to t o220) output current: 1.5 a high efficiency: 81% typ. (at vo = 5 v) requires only 4 discrete components built-in reference oscillator (300 khz) built-in dropping-type-overcurrent and thermal protection circuits output on/off available (circuit current at output off: 200 a typ.) soft start available by on/off pin electrical characteristics (t a =25 c) full-mold, separate excitation step-down switching mode si-8000tfe series applications onboard local power supplies ? v equipment ? a equipment conditions limited by thermal protection, t jmax =150 c t jmax =125 c limited by thermal protection, t jmax =150 c t jmax =125 c *: this product has built-in thermal protection circuits that may operate when the junction temperature rises above 130 c. the recommended design for the junction temperature during operation is below 125 c. parameter input voltage range output voltage range output current range operating junction temperature range operating temperature range symbol v in v o i o t jop t op unit v v a c c ratings SI-8008TFE si-8050tfe v o+3 *1 to 40 8 to 40 0.8 to 24 5.0 0 to 1.5 ?0 to +125 ?0 to +85 *1: the minimum value of an input voltage range is the higher of 4.5 v or v o + 3 v. SI-8008TFE si-8050tfe min. 0.784 1.6 1.6 typ. 0.800 v in =15v, i o =0.1a max. 0.816 80 40 min. 4.90 typ. 5.00 v in =15v, i o =0.1a 0.5 v in =15v, i o =0.1a, t c =0 to 100 c 81 v in =15v, i o =0.5a max. 5.10 vo v adj ? v oload 0.1 v in =15v, i o =0.1a, t c =0 to 100 c 81 v in =15v, i o =0.5a ? vo/ ? t ? v ref / ? t 10 v ssl =0v 10 v ssl =0v 0.5 40 0.5 40 10 v in =15v, i o =0.2 to 1.5a 10 v in =15v, i o =0.2 to 1.5a 300 v in =15v, i o =0.5a 300 v in =15v, i o =0.5a fo 60 v in =10 to 30v, i o =0.5a 60 v in =10 to 30v, i o =0.5a 80 40 ? v oline 6 v in =15v, i o =0a 6 v in =15v, i o =0a v in =15v v in =15v i q 200 v in =15v, v ss =0v 200 v in =15v, v ss =0v 400 400 i q(off) low level voltage outflow current at low voltage v ssl i ssl i s v mv/ c % khz mv mv a v a ma a pa r ameter conditions conditions conditions conditions conditions conditions conditions conditions conditions conditions symbol unit ratings ratings output voltage reference voltage efficiency oscillation frequency line regulation quiescent circuit current load regulation overcurrent protection starting current on/off pin* t emperature coefficient of output voltage te mperature coefficient of reference voltage (t a =25 c) *: pin 5 is the ss pin. soft start at power on can be performed with a capacitor connected to this pin. the output can also be turned on/off with this pin. the output is stopped by setting the voltage of this pin to vssl or lower. ss-pin voltage can be changed with an open-collector drive circuit of a transistor. when using both the soft-start and on/off functions together, the discharge current from c3 flows into the on/off control transistor. therefore, limit the cur- rent securely to protect the transistor if c3 capacitance is large. the ss pin is pulled up to the power supply in the ic, so applying the external voltage is prohibited. if the pin is not used, leave it open. si-8000tfe si-8000tfe ss 5ss 5ss c3 c3 5 v o. on/off soft start soft start +v o. on/off si-8000tfe
41 ics si-8000tfe series external dimensions (to220f-5) block diagram t ypical connection diagram 4 3 gnd 2 in ss sw adj 1 5 preg. overcurrent protection reset osc + comp. error amp. latch & drive thermal protection on/off soft start + + SI-8008TFE reference voltage in c 1 220 f c 3 di l 1 47 h r1 r2 c 2 470 f v in gnd ss gnd si-8000tfe sw i adj adj 12 4 3 5 + + v out gnd pin assignment q in w sw e gnd r adj t ss plastic mold package type flammability: ul94v-0 product mass: approx. 2.3g c 1 : 220 f c 2 : 470 f c 3 :1 f (only when using soft-start function) l 1 :47 h di : rk16 (sanken) (unit : mm) 10.0 0.2 4.2 0.2 0.95 0.15 8.2 0.7 2.6 0.1 3.9 0.7 (4.3) (4.6) (17.9) (2.0) 0.85 +0.2 ?.1 0.45 +0.2 ?.1 4.0 0.2 7.9 0.2 4.6 0.6 16.9 0.3 0.5 12345 p1.7 0.7 4=6.8 0.7 2.8 0.2 3.2 0.2
|
