Teac MV1421, Service Manual

Page: 34 / 130

32
6-10. TOP-210 ( Three-terminal off-line PWM Switch )
1. Feature
T h e TO P 2 1 0 is inte n d e d for 1 0 0/11 0 /2 3 0 VA C o ff-lin e p o w e r s u pp ly a pp lica tio n s in th e 0 to 8 W
( 0 to 5 W u n iv e rs a l ) ra n g e .
C o n tro lle d M O S F E T tu rn -o n .
In te g ra te d P W M C c o n tro lle r an d 7 0 0 V M O S F E T in in du s try s ta n d a rd e ig h t p in D IP p a ck a g e .
O n ly o n e e xte rn a l c ap a c ito r n e e de d fo r c o m p e n s a tio n , b y p as s a n d s tart-u p /a u to -re s ta rt fun c tio n s.
A u to -res tart a n d c y cle b y cy c le c u rre n t lim iting fu n c tio n s h a n d le b o th p rim ary a n d se c o n d ary.fa u lts .
O n -c h ip the rm a l s h u td o w n w ith h ys te re s is p ro te c ts th e e n tire sy ste m a ga ins t o v e rlo a d .
2. Description
T h e TO P 2 1 0 is s ta n d -b y p o w e r su p p ly fo r G R E E N o r E N E R G Y E F F IC IE N T P R O D U C T S .
3. Block Diagram
4. Pin Description
S Y M B O L PIN DE S C R IP TIO N
SO U R C E 1 Internally connected to output M O SFET source
N C 2 nc
N C 3 nc
C O N TR O L 4 Error am plifier and feedback current input pin
D R AIN 5 O utput M O SFET drain connection
N C 6 nc
N C 7 nc
SO U R C E 8 O utput M O SFET source connection for high voltage return