qc3.0 & nt6008 introduction 2015/10/06€¦ · smart usb charger identification circuit –...
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EOSMEM Confidential 1EOSMEM Confidential
QC3.0 & NT6008 Introduction
2015/10/06
EOSMEM Confidential 2EOSMEM Confidential
QC3.0 defines continuous mode as D+ = 0.6, D- = 3.3V
Output voltage increases/decreases 200mV upon each D+/D- toggle
Output voltage range: 3.6V ~ 20V (12V for class A)
QC3.0 vs. QC2.0
5V
12V 9V
20V
(Undenfined)Undefined
Undefined5V
App
le M
od
e
D+
D-
2V0.4V
2V
0.4V
12V 9V
20V
(Undenfined)
Continuous
Mode
5V
App
le M
od
e
D+
D-
2V0.4V
2V
0.4V
QC2.0 QC3.0
EOSMEM Confidential 3EOSMEM Confidential
D+ > 2.0V pulse increases output voltage by 200mV
D- < 2.0V pulse decreases output voltage by 200mV
Pulses < 150us will be skipped
Once entering QC3.0, stay at QC3.0 unless D+ or D - < 0.4V
Output Voltage Increment/Decrement
DP
DM
VOUT
2.0V
200mV
tH
150us
tL
DP
DM
VOUT
2.0V
200mV
tH
150us
tL
EOSMEM Confidential 4EOSMEM Confidential
OUT pin sinks/sources current to adjust output voltage of HVDCP
according to QC2.0/3.0 protocol
MSOP-10L easy to co-layout with other QC2.0 parts
Application Circuit
GND
VCC SEL
REG
1
2
5
7
4
IREF
DM
8
TSOT23-8
DP 3 6
OUT
GND
SEL
DM
IREF
1
OUT
REG
NC
NC
VCC
DP
2
3
4
10
9
8
7
6
MSOP-10L
5
HVDCP
3.6V~12V VBUS
NT6008
FB
GND
DP
DM
VCC
OUT
IREF
SEL
REG
EOSMEM Confidential 5EOSMEM Confidential
3.3V ~ 13.5V Single Supply Operation
Smart USB Charger Identification Circuit
– Compliant with QC2.0/3.0 Class A
– Selectable Apple iPad 2.4A/2.1A Applications
– Support Samsung Galaxy Note 2.0A Applications
– Support BC1.2 & YD/T 1591 Battery Charging Specifications
8kV High ESD
Smooth Voltage Transition
OVP Protection
Discharge Function
-40OC ~ +125OC Operating Ambient Temperature
TSOT23-8L or MSOP-10L Package
RoHS Compliant and Halogen-Free
Features
EOSMEM Confidential 6EOSMEM Confidential
Enter mode 2 if data line detection, primary detection
– VDP> 2.875V for 2ms
– VDM < 2.0V (1.5V if Apple 2.1A selected) for 10ms
– VDP < 2.0V for 10ms
Operation Mode I – Apple Mode
2.75V
2.75V30K
30K
DM
DP 2.75V
2.05V30K
30K
DM
DP
SEL = Low SEL = High
EOSMEM Confidential 7EOSMEM Confidential
Enter mode 3 if 0.4 < VDP < 1.05V for one second
Otherwise enters mode 1 when the 3-second counter expires
Operation Mode II – Samsung Mode
1.2V100K
20R
DM
DP
EOSMEM Confidential 8EOSMEM Confidential
Enters mode 4 (QC2.0 mode) if 0.4V < VDP < 1.05V for 0.2s.
Otherwise enters mode 1 when the 3-second counter expires
Operation Mode III – BC1.2 Mode
20K
20R
DM
DP
400K
EOSMEM Confidential 9EOSMEM Confidential
Leaves mode 4 and enter mode 1 if VDP < 0.4V 2ms or VCC
overvoltage protection is triggered
QC2.0 is confirmed if VDM < 0.4V for 2ms
NT6008 adjusts output voltage according to QC2.0/3.0 protocol
Operation Mode IV – QC Mode
20K
DM
DP
400K
IOUT = 0mA
IOUT = 7xIREF IOUT = 4xIREF
Undefined
(keep last
state)
Continuous
Mode
IOUT = 0mA
App
le M
od
e
D+
D-
2V0.4V
2V
0.4V
QC3.0
EOSMEM Confidential 10EOSMEM Confidential
IREF = VREF / RREF = 1V/RREF
DVBUS = DK x IREF * RREF = DK (V)
K = 0 for 5V; = 4 for 9V; K = 7 for 12V
0.1xIREF, 50us per step to ensure smooth voltage transition
When voltage decreasing, discharges with 10mA/500ms
Output Voltage Adjustment
VBUS
D+
D-
GND
HVDCP
3.6V~12V VBUS
NT6008
FB
GND
DP
DM
VCC
OUT
IREF
SEL
REGRREF
RFB1
IOUT
50us
0.1x IREF
EOSMEM Confidential 11EOSMEM Confidential
VIN = 20V to ensure 12V output
EVB BOM Schematic
EOSMEM Confidential 12EOSMEM Confidential
Smooth voltage transition w/o
overshoot
NT6008 vs. QC2.0 Supporting Phone
D+
D-
VOUT
EOSMEM Confidential 13EOSMEM Confidential
VOUT
D+
D-
QC3.0 Identification Single Increment
Group Increment Group Decrement
NT6008 vs. QC3.0 Supporting Phone
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