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IMP38C43EMA Datasheet(PDF) 2 Page - A1 PROs co., Ltd. |
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IMP38C43EMA Datasheet(HTML) 2 Page - A1 PROs co., Ltd. |
2 / 10 page IMP38C/HC/42/3/4/5 IMP38C/HC/42/3/4/5 2 408-432-9100/www.impweb.com © 2000 IMP, Inc. ! S Pin Descriptions Pin Configuration IMP38C4x IMP38HC4x 1 COMP 2 FB 3 ISNS 4 RT/CT VREF VDD OUT GND 8 7 6 5 38C/HC_02.eps SO/MicroSO/DIP SO/DIP IMP38C4x IMP38HC4x 1 COMP 2 NC 3 FB 4 NC VREF NC VDD VD 14 13 12 11 5 ISNS OUT 10 6 NC AGND 9 7 RT/CT PGND 8 38C/HC_03.eps r e b m u N n i P e m a Nn o i t c n u F e g a k c a P n i P - 8e g a k c a P n i P - 4 1 11 P M O C . r o t a r a p m o c M W P e h t o t t u p n i d n a r e i f il p m a r o r r E e h t f o t u p t u O 23 B F. r e i f il p m A r o r r E e h t f o t u p n i g n i t r e v n I 35 S N S I. V 1 o t d e t i m il y ll a n r e t n i s i t I . t u p n i r o t a r a p m o c e s n e s t n e r r u C 47 T C / T R o t d e t c e n n o c s i T R r o t s i s e R . n o i t c e n n o c t n e n o p m o c g n i m i t C R r o t a ll i c s O V F E R d n a T R f o s e u l a v t n e r e f f i D . d n u o r g o t d e t c e n n o c s i T C r o t i c a p a c d n a . e l c y c y t u d m u m i x a m e h t e n i m r e t e d T C 58 D N G P / D N G r e w o p d n a s e c i v e d d e g a k c a p n i p - 8 r o f d n u o r g g o l a n a d n a r e w o p d e n i b m o C . e g a k c a p n i p - 4 1 r o f d n u o r g 60 1T U O n e h w W O L d l e h y l e v i t c a s i n i p T U O . t u p t u o r e v i r d e l o p - m e t o t , r e w o p - h g i H V C C . d l o h s e r h t O L V U e h t w o l e b s i 72 1V D D . t u p n i e g a t l o v y l p p u S 84 1V F E R . t u p t u o e g a t l o v e c n e r e f e r - V 5 9D N G A. e g a k c a p n i p - 4 1 r o f n o i t c e n n o c d n u o r g g o l a n A 1 1VD . e g a k c a p n i p - 4 1 r o f e g a t l o v y l p p u s r e v i r d t u p t u O 3 1 , 6 , 4 , 2C N. n o i t c e n n o c l a n r e t n i o N s p e . 1 0 t _ C H - C 8 3 powered through the out pin. Leakage current from the external power MOSFETs will not force the PWM output to rise and turn the external MOSFETs on. Current-sense propagation delay time is 35ns typical, 65ns maxi- mum, representing an up to 75 percent reduction over other 38xx implementations. Output stage drive is 0.5A for IMP38C4x devices. The high-drive IMP38HC4x family is rated at 1.0A peak current drive. Like conventional 384x controllers, the IMP38C4x and IMP38HC4x controllers use the current-mode architecture for superior load regulation, pulse-by-pulse current limiting and out- put MOSFET protection. All versions operate up to 20 volts. For maximum application flexibility, start-up voltage ranges from 14.5V to 8.4V. Start-up current has been reduced to 120 µA maxi- mum and operating current has been reduced to 1.5mA maximum. The IMP38C4x/IMP38HC4x are available in 8-pin and 14-pin DIP and SO packages as well as the 8-pin MicroSO package. The 14- pin devices provide separate pins for the controller power supply and the output driver supply. This configuration maximizes application flexibility and performance. The 14-pin package can also dissipate more power. Devices in the compact 8-pin packages do not have separate output drive supply connections. The IMP38C4x and IMP38HC4x families operate over the –40 °C to +85 °C temperature range. |
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