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FAN6100Q
Secondary-Side Constant Voltage and Constant Current
Controller Compatible with Qualcomm® Quick Charge 2.0
Features
Description
Supports Qualcomm Quick Charge 2.0
Specification
Secondary-Side Constant Voltage (CV) and
Constant Current (CC) Regulation
Built-in Charge-Pump Circuit for Low Output
Voltage Operation
Internal, Accurate, Adaptive CV/CC Reference
Voltage
Low-Value Current Sensing Resistor for High
Efficiency
Programmable Cable Voltage Drop
Compensation
Two Operational Transconductance Amplifiers
with Open-Drain Type for Dual-Loop CV/CC
Control
Compatible with Fairchild’s FAN501A
Output Under-Voltage Protection
Wide VIN Supply Voltage Range
®
Adaptive Secondary-Side Output Over-Voltage
Protection through Photo-Coupler
Low Quiescent Current Consumption in Green
Mode < 850 µA
Available in 20-Pin 3 x 4 mm MLP Package
The controller consists of two operational amplifiers
for voltage and current loop regulation with adjustable
reference voltage. The CC control loop also
incorporates a current sense amplifier with gain of 10.
Outputs of the CV and CC amplifiers are tied together
in open drain configuration.
The FAN6100Q enables power adaptor’s output
voltage adjustment if it detects a protocol capable
powered device. It can be capable of outputting 5.0 V
at the beginning, and then 9 V or 12 V to meet
requirement of High-Voltage Dedicated Charging Port
(HVDCP) power supply. If a non compliant powered
device is detected, the controller disables output
voltage adjustment to ensure safe operation with
smart phone and tablets that support only 5 V.
FAN6100Q also incorporates an internal charge pump
circuit to maintain CC regulation down to power
supply’s output voltage, VBUS of 2 V without an
external voltage supply to the IC. Programmable
cable voltage drop compensation allows precise CV
regulation at the end of a USB cable via adjusting one
external resistor.
The device is available in the 20-pin MLP 3 x 4
package.
Applications
The FAN6100Q is a integrated secondary side power
®
adaptor controller that is compatible with Qualcomm
™
Quick Charge 2.0 Class A technology. It is designed
for use in application that requires Constant Voltage
(CV) and Constant Current (CC) regulation.
Battery Chargers for quick charge application
AC/DC Adapters for Portable Devices that
Require CV/CC Control
All trademarks are the property of their respective
owners.
Ordering Information
Part Number
Operating
Temperature Range
Package
Packing Method
FAN6100QMPX
-40C to +125C
20-Lead, MLP, QUAD, JEDEC MO-220,
3 mm x 4 mm, 0.5 mm Pitch, Single DAP
Tape & Reel
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
March 2015
VO
D+
D-
AC IN
GND
8
7
U1
FAN501A
6
4
5
10
1
9
2
11
10
9
2
1
3
3
12
18
13
U2
FAN6100Q
19
15
17
14
16
6
5
4
8
20
7
Figure 1. Typical Application
Internal Block Diagram
OVP
VIN
CP
CN
VDD
Voltage Magement
with Charge Pump
Mode Condition
VIN-OVP
3.65/3.25V
6.4/6.2V
Mode Condition
Internal
Bias
0.495V/0.37V
VIN-UVP
SFB
VREF
Cable Voltage Drop
Compensation
Σ
COMR
Mode Condition
VCVR
IREF
CSN
AVCCR
CSP
VIN UVP
Protection
Multiplier
Mode Condition
BLD
VCCR
PGND
Mode Communication
Constant Current Mode Selection
SGND
QP
QN
DP
DN
Figure 2. Function Block Diagram
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
2
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Application Diagram
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Marking Information
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
T: Package Type (MP=MLP)
M: Manufacture Flow Code
ZXYTT
6100Q
TM
Figure 3.Top Mark
Pin Configuration
NC
CN
CP
VDD
20
19
18
17
VIN
1
16
PGND
BLD
2
15
QP
OVP
3
14
QN
IREF
4
13
DN
SFB
5
12
DP
VREF
6
11
SGND
FAN6100Q
7
8
9
10
SGND
COMR
CSP
CSN
Figure 4. Pin Assignments
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
3
Pin #
Name
Description
1
VIN
Input Voltage Detection. This pin is tied to output terminal of the power adaptor to monitor
output voltage and supply internal charge pump circuit.
2
BLD
Output Bleeder Current Setting. This pin connects to output terminal of the power adaptor via
an external resistor to form an output discharging path when mode changes from high-output
voltage to low-output voltage.
3
OVP
Output Over-Voltage-Protection. This pin is used for adaptive output over-voltage-protection.
Typically an opto-coupler is connected to this pin to generate pull-low protection signal.
4
IREF
Reference Output Current Sensing Voltage. The voltage is the amplifying output current
sensing voltage. This pin is tied to the internal CC loop amplifier positive terminal.
5
SFB
Secondary-Side Feedback Signal. Common output terminal of the dual operational
transconductance amplifiers with open drain operation. Typically an opto-coupler is connected
to this pin to provide feedback signal to the primary-side PWM controller.
6
VREF
Reference Output Voltage Sensing Voltage. This pin is used to sense the output voltage for CV
regulation via resistor divider. It is tied to the internal CV loop amplifier positive terminal.
7
SGND
Signal Ground.
8
COMR
Programmable Cable-Drop Voltage Compensation. An external resistor is connected to this pin
to adjust output voltage compensation weighting.
9
CSP
Positive Terminal of Output Current Sensing Amplifier. This pin connects directly to the positive
voltage terminal of the current sense resistor. CSP need to be tied to ground of power adaptor
via short PCB trace.
10
CSN
Negative Terminal of Output Current Sensing Amplifier. This pin connects directly to the
negative voltage terminal of the current sense resistor. CSN need to be tied to negative terminal
of output capacitor via short PCB trace.
11
SGND
12
DP
Positive Terminal of Communication Interface. This pin is tied to the USB D+ data line input.
13
DN
Negative Terminal of Communication Interface. This pin is tied to the USB D- data line input.
14
QN
LSB Switch for Mode Selection of Output Current.
15
QP
MSB Switch for Mode Selection of Output Current.
16
PGND
17
VDD
18
CP
Positive Voltage Terminal of Charge Pump.
19
CN
Negative Voltage Terminal of Charge Pump. An external capacitor is necessary to be
connected between CP pin and CN pin.
20
NC
No Connect
Signal Ground.
Power Ground.
Power Supply. IC operating current is supplied through this pin. This pin is typically connected
to an external VDD capacitor.
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
4
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Pin Definitions
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
Parameter
Min.
Max.
Unit
VVIN
VIN Pin Input Voltage
20
V
VBLD
BLD Pin Input Voltage
20
V
VOVP
OVP Pin Input Voltage
20
V
VSFB
SFB Pin Input Voltage
-0.3
20
V
VIREF
IREF Pin Input Voltage
-0.3
6.0
V
VVREF
VREF Pin Input Voltage
-0.3
6.0
V
VCOMR
COMR Pin Input Voltage
-0.3
6.0
V
VCSP
CSP Pin Input Voltage
-0.3
6.0
V
VCSN
CSN Pin Input Voltage
-0.3
6.0
V
VDP
DP Pin Input Voltage
-0.3
6.0
V
VDN
DN Pin Input Voltage
-0.3
6.0
V
VQN
QN Pin Input Voltage
-0.3
6.0
V
VQP
QP Pin Input Voltage
-0.3
6.0
V
VDD
VDD Pin Input Voltage
-0.3
6.0
V
VCP
CP Pin Input Voltage
-0.3
6.0
V
VCN
CN Pin Input Voltage
-0.3
6.0
V
PD
Power Dissipation (TA=25C)
0.88
W
θJA
Thermal Resistance (Junction-to-Air)
110
C/W
TJ
Junction Temperature
-40
+150
C
Storage Temperature Range
-40
+150
C
+260
C
TSTG
TL
ESD
Lead Temperature, (Wave soldering or IR, 10 Seconds)
Electrostatic Discharge Capability
Human Body Model, JEDEC:JESD22_A114
2.0
Charged Device Model,
JEDEC:JESD22_C101
2.0
kV
Note:
1. All voltage values, except differential voltages, are given with respect to GND pin.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance. Fairchild does not recommend exceeding them or
designing to Absolute Maximum Ratings.
Symbol
Parameter
Min.
Max.
Unit
Junction Temperature
-40
+125
C
VDD-OP
VDD Operating Voltage
3.12
6.00
V
VIN-OP
VIN Operating Voltage
16
V
TJ
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
5
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Absolute Maximum Ratings
VIN=5 V or 9 V or 12 V at TJ = -40C to 125C unless noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
VIN Section
VIN-OP
IIN-OP-5V
IIN-OP-9V,12V
IIN-Green
IIN-ST
Continuous Operating Voltage
16
V
Operating Supply Current at 5 V
VIN=5 V,
VCSP=100 mV,
VCSN=0V
2.4
3.2
mA
Operating Supply Current Over 5 V (9 V, 12 V)
VIN=12 V,
VCSP=100 mV,
VCSN=0 V
1.2
2.0
mA
Green Mode Operating Supply Current
VIN=5 V,
VCSP=VCSN=0 V
850
1050
µA
Startup Current
VIN=1 V,
VCSP=100 mV,
VCSN=0 V
15
µA
VIN-UVP-L-5V
VIN Under-Voltage-Protection Enable Voltage at 5 V
2.35
2.50
2.65
V
VIN-UVP-H-5V
VIN Under-Voltage-Protection Disable Voltage at 5 V
2.85
3.00
3.15
V
VIN-UVP-L-9V
VIN Under-Voltage-Protection Enable Voltage at 9 V
6.50
6.75
7.00
V
VIN-UVP-H-9V
VIN Under-Voltage-Protection Disable Voltage at 9 V
7.40
7.65
7.90
V
VIN-UVP-L-12V
VIN Under-Voltage-Protection Enable Voltage at
12 V
8.70
9.00
9.30
V
VIN-UVP-H-12V
VIN Under-Voltage-Protection Disable Voltage at
12 V
9.85
10.20 10.55
V
tD-VIN-UVP
VIN Under-Voltage-Protection Debounce Time
10
15
20
ms
VIN-EN-L
Charge-Pump Enable Threshold Voltage
1.5
2.0
2.5
V
VIN-CP
Charge Pump Disable Threshold Voltage
6.20
6.40
6.60
V
VIN-CP-Hys
Hysteresis Voltage for Charge Pump Disable
Threshold Voltage
VIN-OVP-5V
VIN Over-Voltage-Protection Voltage at 5 V
5.80
VIN-OVP-9V
VIN Over-Voltage-Protection Voltage at 9 V
10.50 10.80 11.10
V
VIN-OVP-12V
VIN Over-Voltage-Protection Voltage at 12 V
14.00 14.40 14.80
V
tD-VIN-OVP
VIN Over-Voltage-Protection Debounce Time
0.20
6.00
V
6.20
V
16
28
40
μs
3.50
3.65
3.80
V
3.12
3.25
3.38
V
120
125
130
kHz
VDD Section
VDD-ON
Turn-on Threshold Voltage
VDD-OFF
Turn-off Threshold Voltage
fS-CP
(2)
Charge Pump Switching Frequency
CC Mode Selection Section
QP/QN-VR
QP/QN-FIX1.5A
QP/QN-FIX2.0A
QP/QN-CLPM
tD_Mode
QP/QN State for Variable CC Mode
QP=0 and QN=0
QP/QN State for Fixative 1.5 A CC Mode
QP=0 and QN=1
QP/QN State for Fixative 2.0 A CC Mode
QP=1 and QN=0
QP/QN State for Current Limit Protection Mode
QP=1 and QN=1
CC Mode Selection De-bounce Time
3.5
4.0
4.5
ms
Continued on the following page…
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
6
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Electrical Characteristics
VIN=5 V or 9 V or 12 V at TJ = -40C to 125C unless noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max. Unit
9.7
10.0
10.3
Constant Current Sensing Section
AV-CCR
(3)
Output Current Sensing Amplifier Gain
V/V
VCCR-VR-5V
Reference Voltage for Constant Current Regulation
at Variable CC 5 V Mode
1.155 1.200 1.245
V
VCCR-VR-9V
Reference Voltage for Constant Current Regulation
at Variable CC 9 V Mode
0.920 0.960 1.000
V
VCCR-VR-12V
Reference Voltage for Constant Current Regulation
at Variable CC 12 V Mode
0.685 0.715 0.745
V
VCCR-FIX-1.5A
Reference Voltage for Constant Current Regulation
at Fixative 1.5 A CC Mode
0.835 0.870 0.905
V
VCCR-FIX-1.5A-12V
Reference Voltage for Constant Current Regulation
at Fixative 1.5 A CC 12 V Mode
0.635 0.660 0.685
V
VCCR-FIX-2.0A
Reference Voltage for Constant Current Regulation
at Fixative 2.0 A CC Mode
1.155 1.200 1.245
V
VCCR-FIX-2.0A-12V
Reference Voltage for Constant Current Regulation
at Fixative 2.0 A CC 12 V Mode
0.865 0.900 0.935
V
AV-CCR-Protection Constant Current Attenuator for Protection Mode
AV-CCR-UVP
Constant Current Attenuator for VIN Under-Voltage
Protection
0.125
V/V
0.125
V/V
VGreen-H
Green Mode Disable Threshold Voltage
0.400 0.495 0.590
0.34
VGreen-L
Green Mode Enable Threshold Voltage
tGreen-BLANK
Green Mode Blanking Time at Startup
ZCSP,ZCSN
Current Sensing Input Impedance
(3)
0.37
0.40
40
V
V
ms
MΩ
4
Constant Voltage Sensing Section
VCVR-5V
Reference Voltage for Constant Voltage Regulation
at 5 V
0.980 1.000 1.020
V
VCVR-9V
Reference Voltage for Constant Voltage Regulation
at 9 V
1.765 1.800 1.835
V
VCVR-12V
Reference Voltage for Constant Voltage Regulation
at 12 V
2.355 2.400 2.445
V
Cable Drop Compensation Section
KCOMR-CDC
Design Parameter for Cable-Drop Voltage
Compensation
0.90
1.00
1.10
µA/V
Constant Current Amplifier Section
Gm-CC
fP-CC
RCC-IN-CC
CC Amplifier Transconductance
(3)
(3)
CC Amplifier Dominate Pole
(3)
CC Amplifier Input Resistor
8.50
3.5
S
10
kHz
13.75 19.00
kΩ
Constant Voltage Amplifier Section
Gm-CV
fP-CV
IBias-IN-CV
CV Amplifier Transconductance
(3)
3.5
(3)
CV Amplifier Dominate Pole
CV Amplifier Input Bias Current
S
10
(3)
kHz
30
nA
Continued on the following page…
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
7
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Electrical Characteristics
VIN=5 V or 9 V or 12 V at TJ = -40C to 125C unless noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
700
mA
350
ms
Output Bleeder Section
(3)
IBLD
Output Bleeder Current
tBLD
Output Bleeder Current Discharging Time
100
290
320
Secondary-Side Feedback Section
ISFB-Sink-MAX
Maximum SFB Pin Sink Current
(3)
2
mA
2
mA
OVP Section
IOVP-Sink-MAX
Maximum OVP Pin Sink Current
Qualcomm Protocol Section
VDPL
DP Low Level Threshold Voltage
VDPH
DP High Level Threshold Voltage
VDNL
DN Low Level Threshold Voltage
VDNH
DN High Level Threshold Voltage
VSEL_REF
BC1.2 Detection
0.23
0.25
0.27
V
1.94
2.00
2.06
V
0.30
0.35
0.40
V
1.94
2.00
2.06
V
Output Voltage Selection Reference
1.8
2.0
2.2
V
tBC1.2
DP and DN High Debounce Time
1.0
tDP_UNPLUG
Unplug DP Low Debounce Time
20
tTOGGLE
DN Low Debounce Time after BC1.2 Detection
is Complete
tV_CHANGE
Mode Change Signal Detection Debounce
Time
tV_REQUEST
Blanking Time after Mode Change Signal
Detection is Complete
RDP
DP Resistance
RDN
DN Pull-Low Resistance
BC1.2 Detection
20
40
40
1.5
S
60
ms
1
ms
60
ms
200
ms
300
500
700
kΩ
14.25
19.53
24.80
kΩ
Notes:
2. Guaranteed for temperature range -5°C ~85°C.
3. Guaranteed by design.
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
8
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Electrical Characteristics
Figure 5. VDD Turn-On Threshold Voltage (VDD-ON)
vs. Temperature
Figure 6. VDD Turn-Off Threshold Voltage (VDD-OFF)
vs. Temperature
Figure 7. Operating Current Under 5 V (IIN-OP-5V)
vs. Temperature
Figure 8. Operating Current Over 5 V (IIN-OP-9V,12V)
vs. Temperature
Figure 9. Reference Voltage for CC Regulation at
Variable CC 5 V Mode (VCCR-VR-5V) vs. Temperature
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
Figure 10. Reference Voltage for CC Regulation at
Variable CC 9 V Mode (VCCR-VR-9V) vs. Temperature
www.fairchildsemi.com
9
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Typical Performance Characteristics
Figure 11. Reference Voltage for CC Regulation at
Figure 12. Reference Voltage for CC Regulation at
Variable CC 12 V Mode (VCCR-VR-12V) vs. Temperature Fixative 1.5 A CC Mode (VCCR-FIX-1.5A) vs. Temperature
Figure 13. Reference Voltage for CC regulation at
Fixative 1.5 A CC 12 V Mode (VCCR-FIX-1.5A-12V)
vs. Temperature
Figure 14. Reference Voltage for CC Regulation at
Fixative 2.0 A CC Mode (VCCR-FIX-2.0A) vs. Temperature
Figure 15. Reference Voltage for CC Regulation at
Fixative 2.0 A CC 12 V Mode (VCCR-FIX-2.0A-12V)
vs. Temperature
Figure 16. Reference Voltage for CV Regulation at
5.0 V (VCVR-5V) vs. Temperature
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
10
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Typical Performance Characteristics
Figure 17.Reference Voltage for CV Regulation at 9 V
(VCVR-9V) vs. Temperature
Figure 18. Reference Voltage for CV Regulation at
12 V (VCVR-12V) vs. Temperature
Figure 19. VIN OVP Voltage Under 5 V (VIN-OVP-5V)
vs. Temperature
Figure 20. VIN OVP Voltage at 9 V (VIN-OVP-9V)
vs. Temperature
Figure 21. VIN OVP Voltage at 12 V (VIN-OVP-12V)
vs. Temperature
Figure 22. VIN UVP Enable Voltage Under 5 V
(VIN-UVP-L-5V) vs. Temperature
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
11
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Typical Performance Characteristics
Figure 23. VIN UVP Disable Voltage Under 5 V
(VIN-UVP-H-5V) vs. Temperature
Figure 24. VIN UVP Enable Voltage at 9 V
(VIN-UVP-L-9V) vs. Temperature
Figure 25. VIN UVP Disable Voltage at 9 V (VIN-UVP-H-9V)
vs. Temperature
Figure 26. VIN UVP Enable Voltage at 12 V
(VIN-UVP-L-12V) vs. Temperature
Figure 27. VIN UVP Disable Voltage at 12 V (VIN-UVP-H-12V) Figure 28. Charge Pump Disable Threshold Voltage
vs. Temperature
(VIN-CP) vs. Temperature
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
12
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Typical Performance Characteristics
Figure 29.DP Low Level Threshold Voltage
(VDPL) vs. Temperature
Figure 30.DN Low Level Threshold Voltage
(VDNL) vs. Temperature
Figure 31.DP High Level Threshold Voltage
(VDPH) vs. Temperature
Figure 32. DN High Level Threshold Voltage
(VDNH) vs. Temperature
Figure 33.Output Voltage Selection Reference
(VSEL_REF) vs. Temperature
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
13
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Typical Performance Characteristics
The integrated secondary-side power adaptor controller
FAN6100Q which is compatible with Qualcomm® Quick
™
Charge 2.0 Class A technology for quick charger
application. The FAN6100Q enables power supply’s
output voltage adjustment if it detects a protocol capable
mobile and tablet. When a compliant powered is
detected, FAN6100Q will produce BC1.2 procedure
then will permit receiving output voltage change signal
from portable device by DP and DN pin signal. For
™
Qualcomm® Quick Charge 2.0 Class A technology
application, it can be capable of outputting 5.0 V at the
beginning, and then 9 V or 12 V to meet class A
requirement of HVDCP power supplies. These voltages
are based on the capabilities of the downstream device.
The downstream device requests an output voltage for
the HVDCP power supply. If a non compliant powered
device is detected, the controller disables adaptive
output voltage to ensure safe operation with smart
phone and tablets that support only 5 V.
amplifiers for constant voltage (CV) and constant
current (CC) regulation with adjustable voltage
references.
The constant voltage (CV) regulation is implemented in
the same way as the conventional isolated power
supply. The output voltage is sensed on the VREF pin
via the resistor divider, RF1 and RF2 and compared with
the internal reference voltage for constant voltage
regulation (VCVR) to generate a CV compensation signal
(COMV) on the SFB pin. The compensation signal is
transferred to the primary-side using an opto-coupler
and applied to the PWM comparator through attenuator
Av to determine the duty cycle.
The output voltage can be derived by setting R F1 and
RF2, calculated by:
VO VCVR
The controller consists of two operational amplifiers for
Constant Voltage (CV) and Constant Current (CC)
regulation with adjustable references voltage. The CC
control loop also incorporates a current sense amplifier
with gain of 10. Outputs of the CV and CC amplifiers are
tied together in open drain configuration. FAN6100Q
also incorporates an internal charge pump circuit to
maintain CC regulation down to the power supply’s
output voltage, VBUS of 2 V without an external voltage
supply to the IC. Programmable cable voltage drop
compensation allows precise CV regulation at the end of
USB cable via adjusting one external resistor.
RF 1 RF 2
RF 2
(1)
Constant-Current Regulation Operation
The constant current (CC) regulation is implemented
with sensing the output current. The output current is
sensed via current-sense resistor (RCS) connected
between the CSP and CSN pins and placed on the
output ground return path. The sensed signal is
amplified by internal current sensing amplifier AV-CCR
before the amplified current feedback signal is fed into
the positive terminal of the internal operational amplifier
and compared with the internal reference voltage for
constant current regulation (VCCR) to generate a CC
compensation signal (COMI) on the SFB pin. The
compensation signal is transferred to the primary-side
using an opto-coupler to the primary-side PWM
controller. The constant current point (IO_CC) can be set
by selecting the current sensing resistor as:
Furthermore, protection functions of the FAN6100Q
include adaptive VIN Over-Voltage Protection (VIN
OVP) and adaptive VIN Under-Voltage Protection (VIN
UVP).
Constant-Voltage Regulation Operation
I O _ CC
Figure 34 shows the primary-side internal PWM control
circuit of FAN501A and secondary side regulator circuit
of FAN6100Q which consists of two operational
1
AV CCR
VCCR
RCS
(2)
Np:Ns
Lm
CO1
+
VO
-
RL
IREF
CFC1
RFC1
VREF
CFV1
CO2
RCS_SEC
Gate
S Q
OSC
R Q
CSN
RLED
CLED
Drv
CSP
RF1
IDS
AV-CCR
CS
RCS_PRI
SFB
RFB
COMV
RFV1
-
+
-
Av
VCCR
Rbias
+
1/3
-
Slope
Compensation
+
COMI
VSAW
VEA.V
VCVR
FB
RF2
CFB
COPT
Figure 34. Internal PWM Control Circuit
© 2014 Fairchild Semiconductor Corporation
FAN6100Q • Rev. 1.2
www.fairchildsemi.com
14
FAN6100Q — Secondary-Side CV/CC Controller Compatible with Qualcomm® Quick Charge 2.0
Functional Description
VSAW
Table 2. Variable CC Mode Specifications
Gate
Output Voltage
Rated Current
COMI
5V
2.0 A
COMV
9V
1.67 A
OSC CLK
12 V
1.25 A
CV Regulation
CC Regulation
For fixative 1.5 A CC Mode setting, it is fixative CC
output 1.5 A except for 12 V mode. The QP should be
connected to ground as a low-level signal and QN can
be open to generate a high-level signal. The
specifications are as follows:
Figure 35. PWM Operation for CV and CC
VEA is compared with an internal sawtooth waveform
(VSAW ) by PWM comparators to determine the duty
cycle. As seen in Figure 34, outputs of comparators is
used as a reset signal of flip-flop to determine the
MOSFET turn-off instant. The lower signal, either
COMV or COMI, is transferred to the primary-side to
determine the duty cycle, as shown in Figure 35. During
CV regulation, COMV is transferred to the primary-side
to determine the duty cycle while COMI is saturated to
HIGH. During CC regulation, COMI is transferred to the
primary-side to determine the duty cycle while COMV is
saturated to HIGH.
Table 3. Fixative 1.5A CC Mode Specifications
Output Voltage
5V
9V
12 V
Rated Current
1.5 A
1.1 A
For fixative 2.0 A CC Mode setting, it is fixative CC
output 2.0 A except for 12 V mode. The specifications
are as follows:
Green Mode Operation
FAN6100Q has Green Mode operation with low
quiescent current consumption (
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