BELLING BL2514A Usb dedicated charging port (dcp) controller Datasheet

BL2514A
USB dedicated charging port (DCP) controller
BL2514A
DESCRIPTION
The BL 2514A is USB dedica ted c ha rging p ort (DCP) c on trollers . Applic ati ons incl ude
ve hicle po we r ch arg e r, wall a dap te rs with USB DCP and o th er USB cha rge rs . The
BL2514A con trolle r h as th e au to -de tec t fe atu re tha t moni to rs th e D+ a nd D– line
vol tages of the USB c onnec to r, pro viding the corre ct elec trical s ignature s on the DP
and D M pins fo r the c orrec t de te cti ons of c ompliant po rtable d e vices to fas t cha rge .
These po rtable de vic es i nclude smart pho nes , 5-V table ts and pers onal media
pla ye rs .
The BL 2514A su ppo rt fi ve of the mos t com mon p ro tocol s:
Divide r 3 (DCP Appl ying 2 .7V o n D+ Line a nd 2 .7V o n D– Line )
USB Batte ry Cha rgin g Spe cifica tion , Re vi sion 1 .2 (BC1 .2 )
Chinese Telecommun icatio ns Indu stry S ta ndard YD /T 1591 -2 00 9
1.2V on b o th D+ and D– lines
FE ATURES
In ac co rdanc e wi th U SB Ba ttery Ch arging Specifica tion , Re visio n 1 .2 (BC1 .2),
suppo rt USB DCP D+ line s horte d to D - lin e.
In ac co rdanc e wi th C hinese Tele communication s Indus try S tand ard YD/T
1591-2009 , su ppo rt S hort mode . ( s uppo rt D+ lin e sho rted to D- line)
Support DCP appl yin g 2 .7 V on D + Line a nd 2 .7 V o n D– Li ne
Support DCP appl yin g 1 .2V to the D + Line and 1.2V to th e D– L ine
Automa tic s wi tching D+ Li ne and D - Line f or con nec ted d e vice s .
Single USB po rt con troller.
Ope ra tion vol ta ge ran ge f rom 4 .5V to 5 .5V
APPLICATIONS
USB ca r cha rge r
AC-DC adap te r wi th USB port
Othe r USB ch arg er
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V1.0
BL2514A
BLOCK DI AGRAM
PIN CONFIGURATI ON
PIN DESCRIPTION
No.
Nam
e
Type
1
DP1
I/O
2
GND
G
3
NC
No Conne ct
4
NC
5
IN
P
6
DM1
I/O
No Conne ct
Powe r suppl y. Co nne ct a c eramic c apaci to r wi th a value of
0.1 -µF o r grea te r f ro m th e IN pin to GND as close to the d e vic e
as possibl e .
Connec ted to the D+ or D– line of USB c on nec tor, p ro vi de the
correc t voltage with a ttach ed po rtable eq ui pment for DCP
dete c tion .
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desc rip tion
Connec ted to the D+ or D– line of USB c on nec tor, p ro vi de the
correc t voltage with a ttach ed po rtable eq ui pment for DCP
dete c tion .
Gro und co nnec tio n
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V1.0
BL2514A
ABS OLUTE M AXIM UM R AT INGS * Over re commended ju nc tion tempe ra tu re ra nge ,
vol tages a re refe renc ed to GND (unle ss o therwise n oted)
Charac te ristic
Cond ition s
Min .
Max.
-0. 3
7
-0. 3
5.8
-0. 3
5.8
Continuou s ou tpu t sou rce
curre n t
Opera ting ju nc tion te mpera tu re
IN
DP 1 outp u t voltage , D M1 o u tpu t
voltage
DP 1 inpu t vo lta ge, DM1 inpu t
voltage
DP 1 inpu t vo lta ge, DM1 inpu t
voltage
DP 1 outp u t voltage , D M1 o u tpu t
voltage
TJ
Sto ra ge te mpe ra tu re ra nge
Tstg
Voltag e ra nge
Continuou s ou tpu t sin k cu rren t
ESD (h u man bod y mod e)
Unit
V
35
mA
35
mA
-40
125
℃
-65
150
℃
8000
V
* 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 xi 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
to the device. These are stress ratings only, and functional operation of the device at these or
any other conditions beyond those indicated under Recommended Operating Conditions is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device
reliability.
THERMAL INFORMATION
Thermal metrc
Symbol
DBV
θJA
179.9
θJCtop
117.5
Junc tion -to -boa rd the rmal resi stance
θJB
41.9
Junc tion -to -top cha ra cte ri za ti on pa rameter
ψJT
17.2
Junc tion -to -boa rd ch arac te ri zati on pa ramete r
ψJB
41.5
Junc tion -to -cas e (b ottom) the rmal re sis tan ce
θJCbot
N/A
Junc tion -to -ambien t thermal re sis tan ce
Junc tion -to -cas e (top ) thermal resis ta nce
Unit
℃ /W
RECOMM ENDED OPER AT IN G C ONDIT IONS
Voltag es a re ref ere nc ed to GND (unle ss o therwise n oted), p osi ti ve cu rre nt are in to
pins .
Charac te ris tic
Symbol
Min.
Max .
Unit
VIN
4.5
5.5
V
DP1 da ta line in pu t v oltag e
VDP1
0
5.5
V
DM1 d ata line inpu t voltag e
VDM1
0
5.5
V
Continu ous sink or so urce curren t
IDP1
±10
mA
Continu ous sink or so urce curren t
IDM1
±10
mA
125
℃
Inpu t vol tage of IN
Ope ra ting jun cti on te mpera ture
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TJ
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-40
V1.0
BL2514A
ELECTRICAL CHARACTERISTICS
Condition s a re –40 °C ≤ (T J = T A ) ≤ 125 °C, 4.5V ≤ V I N ≤ 5 .5V. Po siti ve cu rre n t are i nto
pins . T ypical values are a t 25 °C. All vol ta ges are wi th resp ec t to GND (unle ss
othe rwise n oted ).
Charac te ristic
S ymb o l
Undervo lta ge L oc ko ut
IN rising UV LO thresh old
VUVLO
voltage
H yste re sis
Supp ly Cu rre nt
IN supp ly c urre nt
I IN
BC 1.2 DCP M ode (Sh o rt Mod e)
RDPM_SHOR
DP 1 and DM1 sho rting
re sista nce
T1
RDCHG_SHO
Resistanc e b e tween
DP 1/DM1 a nd GND
RT1
Voltag e th re sh o ld on D P 1
VDPL_ TH_ D
unde r wh ich the de vice
E T AC H 1
goe s b ack to d ivide r mode
VDPL_ TH_ D
H yste re sis
E T AC H _ H Y S
Conditions
Min .
T yp.
Max
Unit
3.89
4.15
4.38
V
100
4.5 V ≤ V
IN
155
231
µA
157
200
Ω
350
656
1150
kΩ
310
330
350
mV
≤ 5.5 V
V D P 1 =0. 8V,
I D M 1 = 1 mA
V D P 1 =0.8 V
mV
50
mV
1
Div ide r M ode
DP 1 outp u t voltage
DM1 ou tpu t vo ltag e
DP 1 outp u t imped an ce
DM1 ou tpu t impe dan ce
1.2 V/1. 2V Mod e
DP 1 outp u t voltage
DM1 ou tpu t vo ltag e
DP 1 outp u t imped an ce
DM1 ou tpu t impe dan ce
VDP1_2.7V
VDM1_2.7V
RDP1_PAD1
RDM1_PAD1
V IN =5V
V IN =5V
I D P 1 = -5µA
I D M 1 = -5µA
2.56
2.56
23.9
23.9
2.7
2.7
30
30
2.87
2.87
36.1
36.1
V
V
kΩ
kΩ
VDP1
VDM1
V IN =5V
V IN =5V
I D P 1 = -5µA
I D M 1 = -5µA
1.11
1.11
79.9
79.9
1.2
1.2
102
102
1.29
1.29
130. 1
130. 1
V
V
kΩ
kΩ
RDP1_PAD1
RDM1_PAD1
* S pecified b y design . No t pro duc tion te ste d.
APPLICATION SUMMARY
OVERVIEW
The follo win g o ve rvie w ref ere nces vari ous indus try s tanda rd s . It is al wa ys
recommended to co n sult the la tes t s tand a rd to ens ure th e mos t recen t a nd acc ura te
informati on .
Recharg eable po rtabl e eq uipment req uire s an e xternal po we r so urce to c ha rge i ts
batte ries . USB po rts are co n venie n t l oca ti ons for c ha rging be ca use of an a vail able
5-V po we r sou rce . Un ive rs all y ac cep ted s tandards a re requi red to en sure hos t an d
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BL2514A
client-si de de vi ces meet the p ower manag ement requi remen ts . Tradi tionall y, USB
hos t ports followi ng the USB 2 .0 Specific a tion mus t p ro vide at l eas t 500 mA to
down stre am clien t-si de d e vice s . B ecau se multiple USB de vices ca n be a ttache d to a
single USB po rt th rou gh a bus -po we red hu b, i t is the respo nsibil ity of the clie n t-side
de vice to ne go tia te th e po we r allo tmen t fro m th e hos t to
guara n tee the to tal c urren t d raw does no t exceed 5 00 mA. In ge neral , ea ch USB
de vice ca n sub seque ntl y requ es t more c urren t, which is g ran te d in s tep s of 100 mA
up 5 00 mA to tal . The hos t ma y g ran t o r de ny th e re ques t ba sed on th e a vailabl e
curren t.
Addition all y, the su cc ess of the USB tec hn olog y mak es the micro-USB conne c tor a
popula r choic e f or wa ll ada pter c ables . Thi s allo ws a portable d evi ce to cha rge f rom
both a wall ad ap te r a nd USB po rt wi th onl y one conne c tor.
One common diffic ulty ha s re sul ted from this. As USB cha rging has g ained pop ulari ty,
the 5 00-mA minimum defined b y the USB 2 .0 Spe cifica tion o r 90 0 mA d efined in the
USB 3.0 Specifica tio n, ha s become ins ufficien t fo r man y ha nds ets , tabl ets and
pers onal media pla ye rs (PMP) whic h ha ve a hig her ra ted cha rgi ng curren t. W all
adap te rs and c ar c ha rge rs ca n pro vide mu ch mo re cu r ren t than 500 mA o r 900 mA to
fast c harge po rtable de vices . Se veral ne w s tan dards ha ve been in troduc ed defining
pro toc ol hand shak ing methods tha t allo w h ost a nd clien t de vice s to a ck nowled ge and
dra w addi tion al cu rre nt be yond the 5 00 mA (defined in the USB 2 .0 Spe cifica tion ) o r
900 mA (defined in th e USB 3 .0 Specifica ti on) minim um while us ing a single
micro-USB inpu t co nn ector.
The BL 2514A su ppo rt fou r of the mos t common p ro tocol s:
USB Batte ry Cha rgin g Spe cifica tion , Re vi sion 1 .2 (BC1 .2 )
Chinese Telecommun icatio ns Indu stry S ta ndard YD /T 1591 -2 00 9
Divide r mode
1.2 Von b o th D+ and D– lines
YD/T 1591 -200 9 i s a subse t of the BC1 .2 s pecifica tion s uppo rte d b y th e vas t majo rity
of de vices tha t imple ment USB ch arging . Divide r and 1.2-V c ha rging s chemes a re
suppo rted in de vices from s pecific ye t p op ular de vice mak ers . B C1.2 ha s th re e
differen t po rt type s, li ste d as follo ws .
Stand ard d owns tream po rt (SDP )
Charging d owns tream po rt (CDP)
Dedicated cha rgin g p ort (DCP)
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BL2514A
The BC1 .2 Spe cifica ti on d efines a c harging po rt as a do wn s tre a m facing USB p ort
tha t p ro vi des po we r f or cha rgin g po rtable equipment .
Table1 sho ws diffe re nt po rt ope ra ting mod es acco rdin g to th e B C1.2 Specifi ca tion .
Table1 . Ope ra tin g Mo des Table
Port T yp t
Supports USB2 .0
Communication
SDP(USB2.0 )
SDP(USB3.0 )
CDP
DCP
Yes
Yes
Yes
No
Maximum Allo wable Curre n t
Drawn b y Po rtable
Equipment(A)
0.5
0.9
1.5
1.5
The BC1 .2 Spe cifica ti on d efines the p ro to c ol ne cess ary to allo w po rtable e quipmen t
to de te rmine wha t typ e of po rt i t i s con nec ted to s o tha t it can al lot i ts maximum
allowabl e cu rren t dra wn . The han d-shak in g p roc ess is two s tep s. Du ring s tep o ne ,
the p rimary de tec tion , the po rtable e quipment o utpu ts a nominal 0 .6 Vou tp ut o n its
D+ lin e and reads th e vol ta ge inpu t on i ts D– line . The po rtabl e de vice co nclude s it
is c onnec ted to a SDP if the vol tag e i s les s tha n the nominal da ta de te c t vol tage of
0.3 V . The po rtabl e d evi ce con clude s tha t it is co nnec ted to a C hargin g P ort if the D–
vol tage is g rea te r tha n the n ominal d ata de tec t voltage of 0 .3V a nd le ss than 0 .8 V .
The secon d s tep , the second ary de tec tion , is n eces sary for p ortable equipmen t to
dete rmine be tween a CDP and a DCP. The portable de vice ou tpu ts a nominal 0 .6 V
outp u t on its D– li ne and re ads the vol tage inpu t o n i ts D + line . The p orta ble de vi ce
conclud es i t i s conn e cte d to a CDP if th e d ata line being remain s is le ss than the
nominal da ta de tec t voltag e of 0.3 V. Th e portable de vice concl udes i t i s conn ec ted
to a DCP if the da ta li ne b eing read is g rea te r than the nominal data de tec t vol ta ge
of 0 .3 V and le ss tha n 0 .8 V .
Dedica ted Charg ing Port (DCP)
A dedi ca ted ch argi ng po rt (DCP) i s a do wn stream po rt on a de vi ce th at ou tpu ts
powe r th rough a USB co nnec to r, bu t is no t ca pable of enume ra ti ng a downs tream
de vice , which g ene ral ly allo ws porta ble de vi ces to fas t ch arg e a t thei r maximum
ra ted cu rren t. A USB charger i s a de vic e with a DCP, s uch as a wall adap ter o r ca r
powe r ada pter. A DCP is iden tifie d b y the elec tric al cha rac te ris tics of i ts da ta lines .
The follo win g DCP id entific ati on ci rcui ts a re u suall y u sed to meet the ha ndsh ak ing
dete c tions of diffe ren t po rtable de vice s.
Short the D+ L ine to the D– L ine
The USB BC1.2 S pec ificatio n and the Chin ese Telecom munica ti ons Indus try
Stand ard YD /T 1591 -2009 define tha t the D+ a nd D– da ta lines should be s ho rted
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BL2514A
toge ther wi th a maxi mum serie s imped anc e of 20 0 Ω . Thi s is sh own in Figu re1 .
Fig 1 . DC P Sho rt Mod e
Divider 3 (DCP App lying 2 .7 V on D+ L in e and 2 .7 V on D– L ine)
There is o ne cha rgin g s cheme for di vide r DCP. The Di vid er 3 c hargin g scheme is
used for 12-W adapte rs , and a pplies 2 .7V on D + and D- lin es .
Fi g 2. Di vid e r 3 DCP
The BL 2514A is USB dedica ted c ha rging p ort (DCP) c on trollers . Applic ati ons incl ude
ve hicle po we r ch arg e r, wall a dap te rs with USB DCP and o th er USB cha rge rs . The
BL2514A con trolle rs has the au to -de te ct f eatu re tha t moni to rs the D + and D– line
vol tages of the USB c onnec to r, pro viding the corre ct elec trical s ignature s on the DP
and D M pins fo r the c orrec t de te cti ons of c ompliant po rtable d e vices to fas t cha rge .
These po rtable de vic es i nclude smart pho nes , 5-V table ts and pers onal media
pla ye rs .
DCP Au to-De tec t
The BL 2514A in teg ra te an au to-de tec t fea ture to su ppo rt di vide r mode , sho rt mode
and 1 .2V / 1 .2Vmode s. If a di vid er de vice i s a tta ched , 2 .7V is a pplied to the DP pin
and 2 .7V i s applie d to the DM pi n.
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V1.0
BL2514A
F ig 3 . DCP Au to -De tec t Func tio nal Diagram
Undervo ltag e Locko ut (UVLO)
The u nde rvol tag e l oc k out (UVL O) ci rc uit di sables DP1and DM1 outp u t vol tage u ntil
the inp u t vol tage rea ches the UVLO tu rn -o n th resh old . Built-in h ysteresis p re ven ts
unwan ted oscill ati ons due to in pu t vol tage drop f rom la rge curre nt su rge s .
The BL 2514A onl y provi de the co rrec t ele c trical sign a tures on the d a ta line of USB
charger p ort
and do no t p ro vid e a ny power fo r the VBUS.
Divide M ode Sele ction o f 12 -W Charge r
The BL 2514A p ro vid e one type of con nec ti ons be tween the DP pin a nd the DM pin
and be tween the D+ data lin e and the D– data lin e of the USB connec to r fo r a 12 -W
USB cha rge r
Table2 Cha rg ing S cheme fo r 12 -W USB Charg ers
USB Charg er
Containin g Charging Schemes
Typ e
12-W
Divide r 3
2.7V on b o th D+ and D- Li nes
BC1.2DCP
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V1.0
BL2514A
Fig 4 . 12 -w USB Cha rge Ap plica tion
La you t Guid e lin es
Place th e BL2514A n ear the USB ou tpu t c onnec to r and pla ce th e 0 .1 -µF b ypass
capaci to r nea r the IN pin .
AP PLIC AT ION C IRCUIT
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V1.0
BL2514A
CH AR ACTER IST ICS CURVES
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V1.0
BL2514A
OUTLINE DRAWING
Un it: mm
SOT-23 -6
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V1.0