tps65552argt_1328476

8/23/2019 tps65552argt_1328476

1/14

RGT DGQ

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P R O

D U C T P R E V I E W

F E A T U R E S A P P L I C A T I O N S

D E S C R I P T I O N

T1

PGND

SWVBAT

F_ON G_IGBT

CHG

I_PEAK

NC

D QF1

D QF2

XFULLor

or

or

V5V

VCC

VA D1

C1

VOUT

VVF

R1

30 m

U0

VCC

LOGIC

Max ON

ENA

InternalENA

0 V DS

U1

V_FULL

U2

U3

I_PEAK1

I_PEAK2TSD

Analog Circuit

D/A Vonv.

Controller

VVF

1:10or

1:11or

1:12

U4

VCC

5[V] drive IGBT

SW1

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

I N T E G R A T E D P H O T O F L A S H C H A R G E R A N D I G B T D R I V E R

D i g i t a l S t i l l C a m e r a s ( D S C ) H i g h l y I n t e g r a t e d S o l u t i o n t o R e d u c e C o m p o n e n t s O p t i c a l F i l m C a m e r a s

M o b i l e P h o n e s W i t h C a m e r a I n t e g r a t e d 5 0 - V P o w e r S w i t c h , R( O N ) = 2 0 0 m T y p i c a l P D A s W i t h C a m e r a

I n t e g r a t e d I G B T D r i v e r

H i g h E f f i c i e n c y T h i s d e v i c e o f f e r s a c o m p l e t e s o l u t i o n f o r c h a r g i n g a P r o g r a m m a b l e P e a k C u r r e n t , 0 . 9 5 A ~ 1 . 8 A p h o t o f l a s h c a p a c i t o r f r o m b a t t e r y i n p u t , a n d s u b - I n p u t V o l t a g e o f 1 . 8 V t o 1 2 V s e q u e n t l y d i s c h a r g i n g t h e c a p a c i t o r t o t h e x e n o n

O p t i m i z e d C o n t r o l L o o p f o r F a s t C h a r g e T i m e t u b e . T h e d e v i c e h a s a n i n t e g r a t e d p o w e r s w i t c h , I G B T d r i v e r , a n d c o n t r o l l o g i c b l o c k s f o r c h a r g e S e n s i n g A l l T r i g g e r F r o m P r i m a r y S i d e a p p l i c a t i o n s . C o m p a r e d w i t h d i s c r e e t s o l u t i o n s , t h e 1 0 - P i n M S O P / 1 6 - P i n Q F N P a c k a g e d e v i c e s i g n i f i c a n t l y r e d u c e s t h e c o m p o n e n t c o u n t ,

P r o t e c t i o n s h r i n k s t h e s o l u t i o n s i z e , a n d e a s e s d e s i g n c o m - M A X O n T i m e p l e x i t y . A d d i t i o n a l a d v a n t a g e s a r e f a s t c h a r g i n g t i m e a n d h i g h e f f i c i e n c y d u e t o t h e o p t i m i z e d P W M c o n t r o l O v e r VD S S h u t d o w n a l g o r i t h m .

T h e r m a l M o n i t o rO t h e r p r o v i s i o n s o f t h e d e v i c e i n c l u d e s f o u r o p t i o n s f o r d e t e r m i n i n g a d i f f e r e n t t a r g e t v o l t a g e , p r o g r a m m a b l e p e a k c u r r e n t , t h e r m a l d i s a b l e m o n i t o r , i n p u t s i g n a l f o r c h a r g e e n a b l e , f l a s h e n a b l e , a n d a n o u t p u t s i g n a l f o r c h a r g e c o m p l e t i o n s t a t u s .

F i g u r e 1 . T y p i c a l A p p l i c a t i o n C i r c u i t

P l e a s e b e a w a r e t h a t a n i m p o r t a n t n o t i c e c o n c e r n i n g a v a i l a b i l i t y , s t a n d a r d w a r r a n t y , a n d u s e i n c r i t i c a l a p p l i c a t i o n s o f T e x a s I n s t r u m e n t s s e m i c o n d u c t o r p r o d u c t s a n d d i s c l a i m e r s t h e r e t o a p p e a r s a t t h e e n d o f t h i s d a t a s h e e t .

P o w e r P A D i s a t r a d e m a r k o f T e x a s I n s t r u m e n t s .

P R O D U C T P R E V I E W i n f o r m a t i o n c o n c e r n s p r o d u c t s i n t h e f o r m a - C o p y r i g h t 2 0 0 5 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d t i v e o r d e s i g n p h a s e o f d e v e l o p m e n t . C h a r a c t e r i s t i c d a t a a n d o t h e r s p e c i f i c a t i o n s a r e d e s i g n g o a l s . T e x a s I n s t r u m e n t s r e s e r v e s t h e

r i g h t t o c h a n g e o r d i s c o n t i n u e t h e s e p r o d u c t s w i t h o u t n o t i c e .

8/23/2019 tps65552argt_1328476

2/14

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PRODUCTPRE

VI EW

A B S O L U T E M A X I M U M R A T I N G S

R E C O M M E N D E D O P E R A T I N G C O N D I T I O N S

D I S S I P A T I O N R A T I N G S

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

T h e s e d e v i c e s h a v e l i m i t e d b u i l t - i n E S D p r o t e c t i o n . T h e l e a d s s h o u l d b e s h o r t e d t o g e t h e r o r t h e d e v i c e p l a c e d i n c o n d u c t i v e f o a m d u r i n g s t o r a g e o r h a n d l i n g t o p r e v e n t e l e c t r o s t a t i c d a m a g e t o t h e M O S g a t e s .

O R D E R I N G I N F O R M A T I O N

T A R G E T V O L T A G E a t T

A

P A C K A G E M A R K I N G P A C K A G E P A R T N U M B E R P R I M A R Y S I D E

- 3 5C t o 8 5 C 2 9 B K V 1 6 - p i n Q F N T P S 6 5 5 5 2 A R G T

- 3 5C t o 8 5 C 2 9 B M A 1 0 - p i n M S O P T P S 6 5 5 5 2 A D G Q

o v e r o p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e ( u n l e s s o t h e r w i s e n o t e d ) ( 1 )

U N I T

V C C - 0 . 6 V t o 6 V VS S S u p p l y v o l t a g e

V B A T - 0 . 6 V t o 1 3 V

V( S W ) S w i t c h t e r m i n a l v o l t a g e - 0 . 6 V t o 5 0 V

S w i t c h c u r r e n t b e t w e e n S W a n d P G N D , I S W 3 A

VI I n p u t v o l t a g e o f C H G , I _ P E A K , F _ O N - 0 . 3 V t o V C C

Ts t g S t o r a g e t e m p e r a t u r e - 4 0 C t o 1 5 0 C

TJ M a x i m u m j u n c t i o n t e m p e r a t u r e 1 2 5 C

( 1 ) S t r e s s e s b e y o n d t h o s e l i s t e d u n d e r " a b s o l u t e m a x i m u m r a t i n g s " m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . T h e s e a r e s t r e s s r a t i n g s o n l y a n d f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s b e y o n d t h o s e i n d i c a t e d u n d e r " r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s " i s n o t i m p l i e d . E x p o s u r e t o a b s o l u t e - m a x i m u m - r a t e d c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y .

M I N N O M M A X U N I T

S u p p l y v o l t a g e , V C C 4 . 5 5 . 5 V VS S

S u p p l y v o l t a g e , V B A T 1 . 8 1 2 V

V( S W ) S w i t c h t e r m i n a l v o l t a g e , - 0 . 3 4 5 V

S w i t c h c u r r e n t b e t w e e n S W a n d P G N D 2 A

O p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e - 3 5 8 5 C

VI H H i g h - l e v e l d i g i t a l i n p u t v o l t a g e a t C H G a n d F _ O N 2 . 4 V

VI L L o w - l e v e l d i g i t a l i n p u t v o l t a g e a t C H G a n d F _ O N 0 . 6 V

P O W E R R A T I N G P O W E R R A T I N G P O W E R R A T I N G P A C K A G E R J A

( 1 )TA < 2 5C TA = 7 0C TA = 8 5C

M S O P 4 9 . 0 8 C / W 2 . 0 4 W 1 . 1 2 W 8 1 5 m W

Q F N 4 7 . 4 0 C / W 2 . 1 1 W 1 . 1 6 W 8 4 4 m W

( 1 ) T h e t h e r m a l r e s i s t a n c e , R J A, i s b a s e d o n a s o l d e r e d P o w e r P A D o n a 2 S 2 P J E D E C b o a r d u s i n g t h e r m a l v i a s .

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P R O


E L E C T R I C A L C H A R A C T E R I S T I C S

S W I T C H I N G C H A R A C T E R I S T I C S

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

TA = 2 5C , V B A T = 4 . 2 V , V C C = 5 V , V ( S W ) = 4 . 2 V ( u n l e s s o t h e r w i s e n o t e d )

P A R A M E T E R T E S T C O N D I T I O N S M I N T Y P M A X U N I T

R( O N L ) O N r e s i s t a n c e o f X F U L L I ( X F U L L ) = - 1 m A 1 . 5 3 k

V( P K H ) ( 1 ) U p p e r t h r e s h o l d v o l t a g e o f I _ P E A K 2 . 4 V

V( P K L ) ( 1 )

L o w e r t h r e s h o l d v o l t a g e o f I _ P E A K 0 . 6 V C H G = H , V ( S W ) = 0 VI C C 1 S u p p l y c u r r e n t f r o m V B A T 2 7 A( f r e e r u n b y t M A X)

C H G = H , V ( S W ) = 0 VI C C 2 S u p p l y c u r r e n t f r o m V C C 2 . 5 5 m A ( f r e e r u n b y t M A X)

I C C 3 S u p p l y c u r r e n t f r o m V C C a n d C H G = L 1 AV B A T

I l k g 1 L e a k a g e c u r r e n t o f S W t e r m i n a l 2 A

I l k g 2 L e a k a g e c u r r e n t o f X F U L L t e r - V ( X F U L L ) = 5 V 1 Am i n a l

S W O N r e s i s t a n c e b e t w e e n R( O N S W ) I ( S W ) = 1 A 0 . 3 1 S W a n d P G N D

R( I G B T 1 ) G _ I G B T p u l l u p r e s i s t a n c e V ( G _ I G B T ) = 0 V 5 1 0 1 5

R( I G B T 2 )

G _ I G B T p u l l d o w n r e s i s t a n c e V ( G _ I G B T )

= 5 V 2 5 5 1 7 5

I ( P E A K 1 ) U p p e r p e a k o f I ( S W ) V( I _ I P E A K ) = 3 V 1 . 5 8 1 . 6 8 1 . 7 8 A

I ( P E A K 2 ) L o w e r p e a k o f I ( S W ) V( I _ I P E A K ) = 0 V 0 . 7 7 0 . 8 7 0 . 9 7 A

C h a r g e c o m p l e t i o n d e t e c t v o l t a g e V( F U L L ) T P S 6 5 5 5 2 A 2 8 . 7 2 9 2 9 . 3 V a t V( S W )

V( Z E R O ) Z e r o c u r r e n t d e t e c t i o n a t V ( S W ) 1 2 0 6 0 m V

T( S D ) ( 1 ) T h e r m a l s h u t d o w n t e m p e r a t u r e 1 5 0 1 6 0 1 7 0 C

O v e r V D S d e t e c t i o n a t V ( S W ) 0 . 9 5 1 . 2 1 . 4 5 V

tM A X M A X O N t i m e 5 0 8 0 1 2 0 s

P u l l d o w n r e s i s t a n c e o f C H G , R( I N P D ) V C H G = V ( F _ O N ) = 4 . 2 V 1 0 0 k F _ O N

( 1 ) S p e c i f i e d b y d e s i g n .

TA = 2 5C , V B A T = 4 . 2 V , V C C = 5 V , V ( S W ) = 4 . 2 V ( u n l e s s o t h e r w i s e n o t e d )

P A R A M E T E R T E S T C O N D I T I O N S M I N T Y P M A X U N I T

F _ O N - G _ I G B T 5 0 n s

S W O N a f t e r V ( S W ) d i p s f r o m V ( Z E R O ) 4 5 n s

S W O F F a f t e r I ( S W ) e x c e e d s I ( P E A K ) 2 7 0 n s tP D

( 1 ) P r o p a g a t i o n d e l a y X F U L L a f t e r V ( S W ) e x c e e d s V ( F U L L ) 3 0 0 n s

S W O N a f t e r C H G 2 0 n s

S W O F F a f t e r C H G 2 0 n s

( 1 ) S p e c i f i e d b y d e s i g n .

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PRODUCTPRE

VI EW

P I N A S S I G N M E N T

Power PAD

1

2

3

4

5

9

8

7

6

10

DGQ PACKAGE

(TOP VIEW)

SW

VBAT

F_ON

I_PEAK

NC

PGND

CHG

XFULL

G_IGBT

VCC

PGND

PGND

CHG

XFULL

SW

SW

VCC

F_ON

NC

VBAT

G_

IGBT

NC

NC

NC

NC

I_PEAK

RGT PACKAGE

(TOP VIEW)

NC No internal connection

16 15 14 13

5 6 7 8

1

2

3

4

12

11

10

9

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

T E R M I N A L F U N C T I O N S

P I N N U M B E R S I G N A L I / O D E S C R I P T I O N

R G T D G Q

1 , 2 2 S W O P r i m a r y s i d e s w i t c h

3 3 V C C I P o w e r s u p p l y v o l t a g e

4 4 F _ O N I G _ I G B T c o n t r o l i n p u t

5 , 8 , 1 3 , 1 6 N C N o c o n n e c t i o n ( i n t e r n a l l y o p e n )

6 5 I _ P E A K I P e a k c u r r e n t c o n t r o l i n p u t

7 6 G _ I G B T O I G B T g a t e d r i v e r o u t p u t

9 7 X F U L L O C h a r g e c o m p l e t i o n o u t p u t

1 0 8 C H G I C h a r g e c o n t r o l i n p u t

1 1 , 1 2 9 P G N D P o w e r g r o u n d 1 4 1 0 N C N o c o n n e c t i o n ( u s e d b y T I , s h o u l d b e o p e n p i n )

1 5 1 V B A T I B a t t e r y v o l t a g e i n p u t

4

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P R O


I_PEAK1I_PEAK2

PGND

SWVBATVCC

F_ON G_IGBT

CHG

I_PEAK

NC

D QF1

D QF2

ENA

TSD

XFULL0 V DS

U1

V_FULL

U2

U3

U4

U0

30 m

Max ON

Logic

InternalENA

VCC

I / O E q u i v a l e n t C i r c u i t s

100 kW

VCC

CHG,

F_ON

PGND

30 mW

SW

PGND

VCC

I_PEAK

PGND

XFULL

PGND

VBAT

PGND

10W

41W

VCC

G_IGBT

PGND

CHG, F_ON SW

I_PEAK XFULL

VBAT G_IGBT

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

F i g u r e 2 . F u n c t i o n a l B l o c k D i a g r a m

F i g u r e 3 . I / O E q u i v a l e n t C i r c u i t s

5

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PRODUCTPRE

VI EW

P R I N C I P L E S O F O P E R A T I O N

CHG

(VOUT)

XFULL

F_ON

G_IGBT

(ENA)

TimeATimeB

TimeC

TimeDTimeETimeFTimeG

TimeHTimeI

TimeJ

S t a r t / S t o p C h a r g i n g

I n d i c a t e C h a r g i n g S t a t u s

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

F i g u r e 4 . W h o l e O p e r a t i o n S e q u e n c e C h a r t

T P S 6 5 5 5 2 A h a s o n e i n t e r n a l e n a b l e l a t c h , F 1 , t h a t h o l d s a c h a r g e ( O N / O F F s t a t u s ) o f t h e d e v i c e . S e e F i g u r e 2 .

T h e o n l y w a y t o s t a r t c h a r g i n g i s t o i n p u t C H G ( s e e t i m e A / C / H i n F i g u r e 4 ) . E a c h t i m e C H G i s r e a c h e d , t h e T P S 6 5 5 5 2 A s t a r t s c h a r g i n g .

T h e r e a r e t h r e e t r i g g e r e v e n t s t o s t o p c h a r g i n g :

1 . F o r c e d s t o p b y i n p u t t i n g C H G = L f r o m t h e c o n t r o l l e r ( s e e t i m e B i n F i g u r e 4 ) .

2 . A u t o m a t i c s t o p b y d e t e c t i n g f u l l c h a r g e . V O U T r e a c h e s t h e t a r g e t v a l u e ( s e e T i m e D i n F i g u r e 4 ) .

3 . P r o t e c t e d s t o p b y o v e r V D S d e t e c t i o n ( s e e T i m e I i n F i g u r e 4 ) .

W h e n t h e c h a r g i n g o p e r a t i o n i s c o m p l e t e d , t h e T P S 6 5 5 5 2 A d r i v e s t h e c h a r g e c o m p l e t i o n i n d i c a t o r p i n , X F U L L , t o G N D . X F U L L i s a n o p e n - d r a i n t y p e o u t p u t . W h e n c o n n e c t i n g t h e i n d i c a t o r L E D t o X F U L L , t h e L E D l i g h t s a r e o n w h e n f u l l y c h a r g e d . T h e c o n t r o l l e r d e t e c t s t h e s t a t u s o f t h e d e v i c e a s a l o g i c s i g n a l w h e n c o n n e c t i n g a p u l l u p r e s i s t e r , R 1 ( s e e F i g u r e 1 ) .

X F U L L e n a b l e s t h e c o n t r o l l e r t o d e t e c t t h e o v e r V D S p r o t e c t i o n s t a t u s u s i n g s o f t w a r e t i m e . I f o v e r V D S p r o t e c t i o n o c c u r s , X F U L L n e v e r g o e s L d u r i n g C H G = H , p r o v i d e d t h a t t h e t i m e r t h a t s t a r t s a t C H G s t o p s a t X F U L L , a n d t i m e s o u t w i t h i n a d e s i g n e d p e r i o d o f m a x i m u m c h a r g i n g t i m e s . T h e c o n t r o l l e r c a n d e t e c t o v e r V D S a t t i m e o u t .

T h e d e v i c e s t a r t s c h a r g i n g a t t i m e H , a n d o v e r V D S p r o t e c t i o n o c c u r s a t T i m e I ( s e e F i g u r e 4 ) . A t t i m e I , X F U L L s t a y s H , a n d t h e c o n t r o l l e r d e t e c t s o v e r V D S p r o t e c t i o n w h e n t h e t i m e r e n d s a t t i m e J . I n t h i s e v e n t , t h e c o n t r o l l e r i n p u t s C H G = L t o t e r m i n a t e t h e o p e r a t i o n .

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P R O


OFF ON OFF

SW

T

LOGIC

V

V

I

I

VZEROVSW

VBAT

VA VOUT

0 V

0 V

ISW IPEAK

0 A

IOUTIPEAK/NTURN

0 A

Time 1 Time 2 Time 3

Time 4

Time 5

SW

T

VFULL

CHG

XFULL

OFF ON OF

F

OFF ON OFF

VBAT

VSW

0 V

VBAT

VOUT

VA

0 V VOUT

VA

IPEAK

IPEAK/NTURNIOUT

ISWISW

IOUTIOUT

0 A

0 A

V

V

I

I

C o n t r o l C h a r g i n g

t = LON

IPEAK

VBAT

( 1 )

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

F i g u r e 5 . T i m i n g D i a g r a m a t O n e S w i t c h i n g C y c l e F i g u r e 6 . T i m i n g D i a g r a m a t B e g i n n i n g / E n d i n g

T h e T P S 6 5 5 5 2 A p r o v i d e s t h r e e c o m p a r a t o r s t o c o n t r o l c h a r g i n g . F i g u r e 2 s h o w s t h e b l o c k d i a g r a m o f T P S 6 5 5 5 2 A a n d F i g u r e 5 s h o w s o n e t i m i n g d i a g r a m s w i t c h i n g c y c l e . N o t e t h a t e m p h a s i s i s p l a c e d o n T i m e 1 a n d T i m e 3 o f t h e w a v e f o r m i n F i g u r e 5 .

W h i l e S W i s O N ( T i m e 1 t o T i m e 2 i n F i g u r e 5 ) , U 3 m o n i t o r s c u r r e n t f l o w t h r o u g h i n t e g r a t e d p o w e r - M O S F E T f r o m S W t o P G N D . W h e n I ( S W ) e x c e e d s I ( P E A K ) , S W t u r n s O F F ( T i m e 2 i n F i g u r e 5 ) .

W h e n S W t u r n s O F F ( T i m e 2 i n F i g u r e 5 ) , t h e m a g n e t i c e n e r g y i n t h e t r a n s f o r m e r s t a r t s d i s c h a r g i n g . M e a n w h i l e , U 2 m o n i t o r s t h e k i c k b a c k v o l t a g e a t t h e S W t e r m i n a l . A s t h e e n e r g y i s d i s c h a r g i n g , t h e k i c k b a c k v o l t a g e i s i n c r e a s i n g a c c o r d i n g t o t h e i n c r e a s e o f V O U T ( T i m e 2 t o T i m e 3 i n F i g u r e 5 ) . W h e n a l m o s t a l l e n e r g y i s d i s c h a r g e d , t h e s y s t e m c a n n o t c o n t i n u e r e c t i f i c a t i o n v i a t h e d i o d e , a n d t h e c h a r g i n g c u r r e n t o f I O U T g o e s t o z e r o ( T i m e s 3 i n F i g u r e 5 ) . A f t e r r e c t i f i c a t i o n s t o p s , t h e s m a l l a m o u n t o f e n e r g y l e f t i n t h e t r a n s f o r m e r i s r e l e a s e d v i a t h e p a r a s i t i c p a t h , a n d t h e k i c k b a c k v o l t a g e r e a c h e s z e r o ( T i m e 3 t o T i m e 4 i n F i g u r e 5 ) . D u r i n g t h i s p e r i o d , U 2 m a k e s S W t u r n O N w h e n ( V ( S W ) - V B A T ) d i p s f r o m V ( Z E R O ) ( T i m e 5 i n F i g u r e 5 ) . I n t h e a c t u a l c i r c u i t , t h e p e r i o d b e t w e e n T i m e 4 a n d T i m e 5 i n F i g u r e 5 i s s m a l l o r d o e s n o t a p p e a r d e p e n d e n t o n t h e d e l a y t i m e o f t h e U 2 d e t e c t i o n t o S W O N .

U 1 a l s o m o n i t o r s t h e k i c k b a c k v o l t a g e . W h e n ( V ( S W ) - V B A T ) e x c e e d s V ( F U L L ) , T P S 6 5 5 5 2 A s t o p s c h a r g i n g ( s e e F i g u r e 6 ) .

I n F i g u r e 5 a n d F i g u r e 6 , O N t i m e i s a l w a y s t h e s a m e p e r i o d i n e v e r y s w i t c h i n g . T h e O N t i m e i s c a l c u l a t e d b y E q u a t i o n 1 . T h i s e q u a t i o n i s n o t d e p e n d e n t o n o u t p u t v o l t a g e .

H o w e v e r , O F F t i m e i s d e p e n d a n t o n o u t p u t v o l t a g e . A s t h e o u t p u t v o l t a g e g e t s h i g h e r , t h e O F F t i m e g e t s s h o r t e r ( s e e E q u a t i o n 2 ) .

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t = N_TURN x LOFF

IPEAK

VOUT

( 2 )

R e f e r e n c e V o l t a g e

T e r m i n a t i o n V o l t a g e S e t t i n g

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

T h e T P S 6 5 5 5 2 A d o e s n o t h a v e i t s o w n r e f e r e n c e v o l t a g e c i r c u i t i n s i d e , a n d t h e T P S 6 5 5 5 2 A u s e s t h e V C C i n p u t

v o l t a g e a s a r e f e r e n c e t o d e t e c t I ( P E A K ) , V( Z E R O ) , a n d V ( F U L L ) . T h e r e f o r e , v o l t a g e i n p u t a t V C C i s a p p r o x i m a t e l y 5 V .

V C C d i f f e r s f r o m 5 V b y s y s t e m l i m i t a t i o n s . T a b l e 1 s h o w s t h e d e p e n d e n c e o f e a c h f u n c t i o n o f T P S 6 5 5 5 2 A t o V C C .

T a b l e 1 . V C C D e p e n d e n c e o f T P S 6 5 5 5 2 A

P A R A M E T E R E Q U A T I O N V C C

4 . 5 5 5 . 5

I ( P E A K 1 ) 0 . 5 2 x V C C - 0 . 9 2 1 . 4 2 1 . 6 8 1 . 9 4

I ( P E A K 2 ) 0 . 2 4 x V C C - 0 . 3 3 0 . 7 5 0 . 8 7 0 . 9 9

V( F U L L ) T P S 6 5 5 5 2 A 5 . 8 x V C C 2 6 . 1 2 9 . 0 3 1 . 9

o v e r V D S 0 . 2 4 x V C C 1 . 0 8 1 . 2 1 . 3 2

T o o b t a i n a d i f f e r e n t t e r m i n a t i o n v o l t a g e , t r a n s f o r m e r s o f d i f f e r e n t t u r n r a t i o a r e r e q u i r e d . T a b l e 2 s h o w s t h e m a t r i x o f t e r m i n a t i o n v o l t a g e a n d t h e t u r n r a t i o o f t h e t r a n s f o r m e r . T h e t a b l e o n l y s h o w s a O N E t o i n t e g e r r a t i o w h i l e t h e r e a r e n o l i m i t a t i o n s f o r a t u r n r a t i o o f t h e t r a n s f o r m e r i n a r e a l a p p l i c a t i o n c i r c u i t , e x a m p l e 1 : 1 0 . 5 ( = 1 0 : 1 0 5 ) .

T a b l e 2 . T e r m i n a t i o n V o l t a g e S e t t i n g T a b l e

T P S 6 5 5 5 2 A

2 9 [ V ]

1 : 1 0 2 9 0

1 : 1 1 3 1 9

1 : 1 2 3 4 8

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P r o g r a m m i n g P e a k C u r r e n t

0.80

1

1.20

1.40

1.60

1.80

2

0 0.5 1 1.5 2 2.5 3 3.5

V(I_PEAK) [V]

I(SW)[A]

I G B T D r i v e r C o n t r o l

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

T h e T P S 6 5 5 5 2 A p r o v i d e s a m e t h o d t o p r o g r a m I ( P E A K ) t h r o u g h t h e i n p u t v o l t a g e o f t h e I _ P E A K t e r m i n a l . F i g u r e 7 s h o w s h o w t o p r o g r a m I ( P E A K ) .

I _ P E A K i n p u t i s t r e a t e d a s a l o g i c i n p u t , w h e n i t s v o l t a g e i s b e l o w V ( P K L ) ( 0 . 6 V ) a n d a b o v e V ( P K H ) ( 2 . 4 V ) . B e t w e e n V ( P K L ) a n d V ( P K H ) , I _ P E A K i n p u t i s t r e a t e d a s a n a n a l o g i n p u t . U s i n g t h i s c h a r a c t e r i s t i c , I ( P E A K ) c a n b e s e t

b y t h e l o g i c s i g n a l o r b y a n a n a l o g i n p u t . T y p i c a l u s a g e s o f t h i s f u n c t i o n a r e :

1 . C h a r g i n g I ( P E A K ) d e p e n d s o n t h e b a t t e r y v o l t a g e . L a r g e I ( P E A K ) f o r a n a d e q u a t e b a t t e r y , s m a l l I ( P E A K ) f o r a p o o r b a t t e r y .

2 . R e d u c i n g I ( P E A K ) w h e n z o o m i n g l e n s ( m o t o r w o r k s ) ; t h i s a v o i d s s h u t d o w n o f t h e b a t t e r y w i t h a l a r g e c u r r e n t ou t p u t .

I n F i g u r e 1 , t h r e e o p t i o n a l c o n n e c t i o n s t o I _ P E A K a r e s h o w n .

1 . U s e t h e c o n t r o l l e r t o t r e a t I _ P E A K a s t h e l o g i c i n p u t p i n . T h i s o p t i o n i s t h e e a s i e s t .

2 . U s e a D / A c o n v e r t e r t o f o r c e I ( P E A K ) t o f o l l o w a n a l o g i n f o r m a t i o n , s u c h a s b a t t e r y v o l t a g e .

3 . U s e a n a n a l o g c i r c u i t t o a c h i e v e t h e s a m e r e s u l t s a s t h e D / A c o n v e r t e r .

F i g u r e 7 . I _ P E A K v s I ( S W )

T h e I G B T d r i v e r p r o v i d e d b y t h e T P S 6 5 5 5 2 A i s a s i m p l e b u f f e r i n t h e l o g i c a l t a b l e . T a b l e 3 s h o w s t h e f u n c t i o n ( s e e F i g u r e 4 ) .

T a b l e 3 . I B G T D r i v e r F u n c t i o n T a b l e F _ O N G _ I G B T

L L

H H

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VI EW

P r o t e c t i o n s

T h e r m a l S h u t d o w n

M A X O N T i m e

O v e r v o l t a g e a t P o w e r S W

P C B I n f o r m a t i o n

PGND

SWVBAT

F_ONG_IGBT

CHG

I_PEAK

I_PEAK1

I_PEAK2

V_FULL

LOGIC

NC

D Q

F1

D Q

F2

ENA

Max ON

TSD

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Internal

R1

POWER UNIT3V

5V

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Note 1

Note 3

Note 4

0 V DS

VOUTD1

C1

T11:10or

1:11or

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R1

Note 2

30 m

U0

U3

U2

U1

SW1

5 V Drive IGBT

VCC

U4

VCC

VCC

ENA

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

T P S 6 5 5 5 2 A p r o v i d e s t h r e e p r o t e c t i o n s : t h e r m a l s h u t d o w n , m a x o n t i m e , a n d o v e r v o l t a g e a t p o w e r S W .

W h e n T P S 6 5 5 5 2 A o v e r h e a t s , a l l f u n c t i o n s s t o p . T h e o n l y w a y t o r e c o v e r i s t o w a i t f o r t h e T P S 6 5 5 5 2 A t o c o o l

d o w n . T h i s p r o t e c t i o n i s n o t t h r o u g h S H U T D O W N , s o t h e T P S 6 5 5 5 2 A r e s t a r t s c h a r g i n g i f C H G s t a y s H d u r i n g t h e w h o l e o v e r h e a t e d p e r i o d .

T o p r e v e n t a c o n d i t i o n s u c h a s p u l l i n g c u r r e n t f r o m a p o o r p o w e r s o u r c e ( i . e . , a n a l m o s t e m p t y b a t t e r y ) , t h e T P S 6 5 5 5 2 A p r o v i d e s a m a x i m u m O N t i m e p r o t e c t i o n . I f t h e O N t i m e e x c e e d s t M A X, t h e T P S 5 5 5 x i s f o r c e d O F Fr e g a r d l e s s o f I ( P E A K ) d e t e c t i o n .

T o a v o i d t h e s t r e s s o f p o w e r d i s s i p a t i o n , t h e T P S 6 5 5 5 2 A p r o v i d e s a n o v e r v o l t a g e m o n i t o r f u n c t i o n a t t h e S W t e r m i n a l . I f t h i s p r o t e c t i o n o c c u r s , t h e o v e r v o l t a g e s t a t u s i s l a t c h e d ( s e e F i g u r e 4 a n d i t s d e s c r i p t i o n s ) .

T h i s f u n c t i o n a l s o p r o t e c t s s h o r t - c i r c u i t o f t h e s e c o n d a r y s i d e . I n t h e s h o r t - c i r c u i t s t a t e o f t h e s e c o n d a r y s i d e , a l m o s t 1 0 0 % o f t h e b a t t e r y v o l t a g e i s s u p p l i e d t o S W , w h i c h s t r e s s e s t h e d e v i c e .

F i g u r e 8 . P C B D e s i g n G u i d e l i n e

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A d d i t i o n a l T e c h n i c a l I n f o r m a t i o n

T P S 6 5 5 5 2 A S L V S 5 6 7 J U L Y 2 0 0 5

F i g u r e 8 s h o w s k e y p o i n t s w h e n d e s i g n i n g a P C B .

1 . I n m a n y D S C d e s i g n s , p a r a s i t i c r e s i s t a n c e t h a t c a n n o t b e i g n o r e d , e x i s t s o n t h e p o w e r l i n e p a t h f r o m t h e b a t t e r y t o t h e p r i m a r y s i d e t u r n o f t h e t r a n s f o r m e r . T h e T P S 6 5 5 5 2 A h a s o n e g r o u n d p o i n t c o n n e c t i o n i n s i d e t h e I C a t t h e P G N D P A D . S o , t h e P C B l a y o u t s h o u l d a l s o k e e p a o n e - p o i n t g r o u n d c o n n e c t i o n a t t h e P G N D t e r m i n a l o f T P S 6 5 5 5 2 A .

2 . T h e l o o p i n d i c a t e d b y d o t t e d - l i n e s i s l a i d o u t a s s m a l l a s p o s s i b l e t o r e d u c e t h e o p e n a r e a o f t h e l o o p .

3 . T h e T P S 6 5 5 5 2 A u s e s t h e V C C i n p u t a s a r e f e r e n c e v o l t a g e . C o n s i d e r i n g N o t e 1 , t h e g r o u n d o f t h e p o w e r u n i t t h a t s o u r c e s V C C i s c o n n e c t e d t o P G N D .

4 . R e g a r d i n g N o t e 3 , t h e b y p a s s c a p a c i t o r , C 2 , i s r e q u i r e d t o a v o i d g r o u n d i n g n o i s e .

T I p r o v i d e s a n a p p l i c a t i o n n o t e f o r t h i s d e v i c e . F o r m o r e t e c h n i c a l i n f o r m a t i o n , p l e a s e f i n d t h e a p p l i c a t i o n n o t e o n t h e T I W e b s i t e o r c o n s u l t y o u r s a l e s c o n t a c t . L i t e r a t u r e n u m b e r S L V A 1 9 7 .

T h e a p p l i c a t i o n n o t e p r o v i d e s t h e f o l l o w i n g i n f o r m a t i o n .

1 . R e c o m m e n d e d e x t e r n a l p a r t s

2 . P C B l a y o u t

3 . D e t a i l e d o p e r a t i o n t h e o r y

4 . C a l c u l a t i o n o f t h e e f f i c i e n c y 5 . K e y p o i n t s t o d e s i g n y o u r s y s t e m

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