Linear Technology DC1427A Quick Start Manual

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT DC1427A
DESCRIPTION
Demonstration circuit 1427A is a USB-based con-
troller with generic Inter Integrated Circuit (I
ports. It is designed to mate with Linear Technol-
ogy's family of LT Powerplay™ demonstration
boards. The demo board is fully isolated from the
host PC's ground. The evaluation software auto-
matically detects which demo board is connected
and loads the appropriate control screen.
D e m o C i r c u i t
U n d e r E v a l u a t i o n
S e l e c t I s o l a t e d S u p p l y V o l t -
a g e ( 2 . 7 V , 3 . 3 V , 5 . 0 V , o r
E x t e r n a l . N o r m a l l y , 3 . 3 V
C o n n e c t e x t e r n a l 1 0 - 1 2 V s u p p l y O N L Y
I F J P 5 , I S O i s s e t t o O F F . S e e T e x t .
C o n n e c t 2 . 7 t o 5 V L o g i c s u p p l y O N L Y I F
V C C I O i s s e t t o E X T . S e e T e x t .
The LT Powerplay system provides a quick and
C™) easy way to evaluate the performance of a wide
2
variety of Linear Technology's products.
L T P o w e r p l a y i s a t r a d e m a r k o f L i n e a r T e c h n o l o g y C o r p o r a t i o n ; I
t r a d e m a r k o f P h i l i p s E l e c t r o n i c s N . V . ; A d o b e i s a t r a d e m a r k o f A d o b e S y s -
t e m s , I n c .
F i g u r e F i g u r e 1 . 1 . 1 . 1 . B a s i c C o n n e c t i o n F i g u r e F i g u r e B a s i c C o n n e c t i o n s s s s B a s i c C o n n e c t i o n B a s i c C o n n e c t i o n
D o N o t C o n n e c t
D o N o t C o n n e c t
I s o l a t e d P o w e r S u p p l y
I S O L A T E D
( S h o w n i n O F F p o s i t i o n )
G R O U N D
I2C/SMBUS/PMBUS CONTROLLER
2
C i s a
U S B C a b l e
T o H o s t P C
1