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Design
UCC28710, UCC28711, UCC28712, UCC28713
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
UCC2871x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation
•
•
•
•
•
•
•
•
•
•
•
•
< 10-mW No-Load Power
Primary-Side Regulation (PSR) Eliminates OptoCoupler
±5% Voltage and Current Regulation Across Line
and Load
700-V Start-Up Switch
100-kHz Maximum Switching Frequency Enables
High-Power Density Charger Designs
Resonant Valley-Switching Operation for Highest
Overall Efficiency
Frequency Jitter to Ease EMI Compliance
Wide VDD Range Allows Small Bias Capacitor
Clamped Gate-Drive Output for MOSFET
Overvoltage, Low-Line, and Overcurrent
Protection Functions
Programmable Cable Compensation (UCC28710)
NTC Resistor Interface (UCC28711, UCC28712
and UCC28713) with Fixed Cable Compensation
Options
SOIC-7 Package
Create a Custom Design Using the UCC28710
With the WEBENCH® Power Designer
2 Applications
•
•
•
USB-Compliant Adapters and Chargers for
Consumer Electronics
– Smart Phones
– Tablet Computers
– Cameras
Standby Supply for TV and Desktop
White Goods
3 Description
The UCC2871x family of flyback power supply
controllers provides isolated-output Constant-Voltage
(CV) and Constant-Current (CC) output regulation
without the use of an optical coupler. The devices
process information from the primary power switch
and an auxiliary flyback winding for precise control of
output voltage and current.
Control algorithms in the UCC28710 family allow
operating efficiencies to meet or exceed applicable
standards. The output drive interfaces to a MOSFET
power switch. Discontinuous conduction mode (DCM)
with valley switching reduces switching losses.
Modulation of switching frequency and primary
current peak amplitude (FM and AM) keeps the
conversion efficiency high across the entire load and
line ranges.
The controllers have a maximum switching frequency
of 100 kHz and always maintain control of the peakprimary current in the transformer. Protection features
help keep primary and secondary component
stresses in check. The UCC28710 allow the cable
compensation to be programmed. The UCC28711,
UCC28712 and UCC28713 devices allow remote
temperature sensing using a negative temperature
coefficient (NTC) resistor while providing fixed cablecompensation levels.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (7)
4.91 mm × 3.90 mm
UCC28710
UCC28711
UCC28712
UCC28713
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application
+
•
•
1
An internal 700-V start-up switch, dynamicallycontrolled operating states and a tailored modulation
profile support ultra-low standby power without
sacrificing start-up time or output transient response.
VAC
VOUT
–
1 Features
UCC28710
VAUX
VDD
VS
HV
DRV
CBC
CS
GND
UDG-12200
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
UCC28710, UCC28711, UCC28712, UCC28713
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
www.ti.com
Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
3
4
7.1
7.2
7.3
7.4
7.5
7.6
4
4
4
4
5
6
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Typical Characteristics ..............................................
Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................. 10
8.4 Device Functional Modes........................................ 12
9
Application and Implementation ........................ 17
9.1 Application Information............................................ 17
9.2 Typical Application .................................................. 17
10 Power Supply Recommendations ..................... 23
11 Layout................................................................... 23
11.1 Layout Guidelines ................................................. 23
11.2 Layout Example .................................................... 25
12 Device and Documentation Support ................. 26
12.1
12.2
12.3
12.4
12.5
12.6
12.7
Device Support......................................................
Documentation Support ........................................
Receiving Notification of Documentation Updates
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
26
28
28
28
28
29
29
13 Mechanical, Packaging, and Orderable
Information ........................................................... 29
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (July 2015) to Revision C
Page
•
Deleted all references to the UCC28714, UCC28715, and UCC28716 devices.................................................................... 1
•
Deleted quasi from quasi-resonant......................................................................................................................................... 1
•
Added the Development Support, Receiving Notification of Documentation Updates, and Community Resources
sections................................................................................................................................................................................. 26
Changes from Revision A (December 2014) to Revision B
•
Page
Updated Layout Guidelines section...................................................................................................................................... 23
Changes from Original (November 2012) to Revision A
•
2
Page
Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
Submit Documentation Feedback
Copyright © 2012–2017, Texas Instruments Incorporated
Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713
UCC28710, UCC28711, UCC28712, UCC28713
www.ti.com
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
5 Device Comparison Table
MINIMUM SWITCHING
FREQUENCY
PART NUMBER (1)
UCC28710
Programmable cable compensation
UCC28711
680 Hz
UCC28712
UCC28713
(1)
(2)
OPTIONS (2)
NTC option, 0-mV (at 5-V output) cable compensation
NTC option, 150-mV (at 5-V output) cable compensation
NTC option, 300-mV (at 5-V output) cable compensation
See Mechanical, Packaging, and Orderable Information section for specific device ordering information.
For other fixed cable compensation options, call TI.
6 Pin Configuration and Functions
UCC28710 D Package
7-Pin SOIC
Top View
VDD
1
VS
2
CBC
3
6
GND
4
5
UCC28711, UCC28712, UCC28713 D Package
7-Pin SOIC
Top View
HV
7
7
HV
3
6
DRV
4
5
CS
VDD
1
VS
2
DRV
NTC
CS
GND
Pin Functions
PIN
UCC28710
UCC28711
UCC28712
UCC28713
I/O
CBC
3
—
I
Cable compensation is a programming pin for compensation of cable voltage drop. Cable
compensation is programmed with a resistor to GND.
CS
5
5
I
Current sense input connects to a ground-referenced current-sense resistor in series with
the power switch. The resulting voltage is used to monitor and control the peak primary
current. A series resistor can be added to this pin to compensate the peak switch current
levels as the AC-mains input varies.
DRV
6
6
O
Drive is an output used to drive the gate of an external high voltage MOSFET switching
transistor.
GND
4
4
—
The ground pin is both the reference pin for the controller and the low-side return for the
drive output. Special care should be taken to return all AC decoupling capacitors as close
as possible to this pin and avoid any common trace length with analog signal return paths.
HV
7
7
I
The high-voltage pin connects directly to the rectified bulk voltage and provides charge to
the VDD capacitor for start-up of the power supply.
NTC
—
3
I
NTC an interface to an external negative temperature coefficient resistor for remote
temperature sensing. Pulling this pin low shuts down PWM action.
VDD
1
1
I
VDD is the bias supply input pin to the controller. A carefully-placed bypass capacitor to
GND is required on this pin.
VS
2
2
I
Voltage sense is an input used to provide voltage and timing feedback to the controller.
This pin is connected to a voltage divider between an auxiliary winding and GND. The
value of the upper resistor of this divider is used to program the AC-mains run and stop
thresholds and line compensation at the CS pin.
NAME
DESCRIPTION
Copyright © 2012–2017, Texas Instruments Incorporated
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UCC28710, UCC28711, UCC28712, UCC28713
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
www.ti.com
7 Specifications
7.1 Absolute Maximum Ratings
(1)
See
.
MAX
UNIT
VHV
Start-up pin voltage, HV
MIN
700
V
VVDD
Bias supply voltage, VDD
38
V
IDRV
Continuous gate current sink
50
mA
IDRV
Continuous gate current source
Self-limiting
mA
IVS
Peak current, VS
VDRV
Gate drive voltage at DRV
Voltage
TJ
−1.2
mA
−0.5
Self-limiting
V
VS
−0.75
7
V
CS, CBC, NTC
−0.5
5
V
−55
150
°C
260
°C
150
°C
Operating junction temperature
Lead temperature 0.6 mm from case for 10 s
Tstg
(1)
−65
Storage temperature
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage 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. All voltages
are with respect to GND. Currents are positive into, negative out of the specified terminal. These ratings apply over the operating
ambient temperature ranges unless otherwise noted.
7.2 ESD Ratings
VALUE
Electrostatic
discharge
V(ESD)
(1)
(2)
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1)
±2000
Charged-device model (CDM), per JEDEC specification JESD22-C101 (2)
±500
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. .
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
VDD
Bias supply operating voltage
CVDD
VDD bypass capacitor
RCBC
Cable-compensation resistance
IVS
VS pin current
TJ
Operating junction temperature
NOM
MAX
UNIT
9
35
V
0.047
1
µF
10
kΩ
−1
mA
−40
125
°C
7.4 Thermal Information
UCC2871x
THERMAL METRIC (1)
D (SOIC)
UNIT
7 PINS
RθJA
Junction-to-ambient thermal resistance
141.5
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
73.8
°C/W
RθJB
Junction-to-board thermal resistance
89
°C/W
ψJT
Junction-to-top characterization parameter
23.5
°C/W
ψJB
Junction-to-board characterization parameter
88.2
°C/W
(1)
4
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
Submit Documentation Feedback
Copyright © 2012–2017, Texas Instruments Incorporated
Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713
UCC28710, UCC28711, UCC28712, UCC28713
www.ti.com
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
7.5 Electrical Characteristics
over operating free-air temperature range, VVDD = 25 V, HV = open, RCBC(NTC) = open, TA = –40 °C to 125 °C, TA = TJ
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
100
250
500
µA
0.1
1
µA
HIGH-VOLTAGE START UP
IHV
Start-up current out of VDD
VHV = 100 V, VVDD = 0 V, start state
IHVLKG
Leakage current at HV
VHV = 400 V, run state
BIAS SUPPLY INPUT
IRUN
Supply current, run
IDRV = 0, run state
2
2.65
mA
IWAIT
Supply current, wait
IDRV = 0, wait state
95
120
µA
ISTART
Supply current, start
IDRV = 0, VVDD = 18 V, start state, IHV = 0
18
30
µA
IFAULT
Supply current, fault
IDRV = 0, fault state
95
125
µA
UNDERVOLTAGE LOCKOUT
VVDD(on)
VDD turnon threshold
VVDD low to high
19
21
23
V
VVDD(off)
VDD turnoff threshold
VVDD high to low
7.7
8.1
8.5
V
VVSR
Regulating level
Measured at no-load condition, TJ = 25 °C (1)
4.01
4.05
4.09
V
VVSNC
Negative clamp level
IVS = –300 µA, volts below ground
190
250
325
mV
IVSB
Input bias current
VVS = 4 V
–0.25
0
0.25
µA
VS INPUT
CS INPUT
VCST(max) Maximum CS threshold voltage
VVS = 3.7 V
738
780
810
mV
VCST(min)
Minimum CS threshold voltage
VVS = 4.35 V
175
195
215
mV
KAM
AM control ratio
VCST(max) / VCST(min)
3.6
4
4.4
V/V
VCCR
Constant current regulating level
CC regulation constant
318
330
343
mV
KLC
Line compensation current ratio
IVSLS = –300 µA, IVSLS / current out of CS pin
24
25
28.6
A/A
TCSLEB
Leading-edge blanking time
DRV output duration, VCS = 1 V
180
235
280
ns
IDRS
DRV source current
VDRV = 8 V, VVDD = 9 V
20
25
RDRVLS
DRV low-side drive resistance
IDRV = 10 mA
VDRCL
DRV clamp voltage
VVDD = 35 V
RDRVSS
DRV pulldown in start state
DRIVERS
(1)
6
150
mA
12
Ω
14
16
V
190
230
kΩ
The regulating level at VS decreases with temperature by 0.8 mV/˚C. This compensation is included to reduce the power supply output
voltage variance over temperature.
Copyright © 2012–2017, Texas Instruments Incorporated
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Electrical Characteristics (continued)
over operating free-air temperature range, VVDD = 25 V, HV = open, RCBC(NTC) = open, TA = –40 °C to 125 °C, TA = TJ
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
92
100
106
kHz
600
680
755
Hz
1.8
2.1
2.55
µs
V
TIMING
fSW(max)
Maximum switching frequency
fSW(min)
Minimum switching frequency
tZTO
Zero-crossing timeout delay
VVS = 3.7 V
UCC28710
UCC28711
UCC28712
UCC28713
VVS = 4.35 V
PROTECTION
VOVP
Overvoltage threshold
At VS input, TJ = 25 °C (1)
4.55
4.6
4.71
VOCP
Overcurrent threshold
At CS input
1.4
1.5
1.6
V
IVSL(run)
VS line-sense run current
Current out of VS pin increasing
190
225
275
µA
IVSL(stop)
VS line-sense stop current
Current out of VS pin decreasing
KVSL
VS line sense ratio
IVSL(run) / IVSL(stop)
TJ(stop)
Thermal shut-down temperature
Internal junction temperature
70
80
100
µA
2.45
2.8
3.05
A/A
165
°C
CABLE COMPENSATION
VCBC(max)
Cable compensation maximum
voltage
Voltage at CBC at full load
UCC28710
2.9
3.2
3.5
V
VCVS(min)
Compensation at VS
VCBC = open, change in VS
regulating level at full load
UCC28710
–55
–15
25
mV
VCVS(max) Maximum compensation at VS
VCBC = 0 V, change in VS regulating
UCC28710
level at full load
275
320
375
mV
UCC28711
–55
–15
25
VCVS
Change in VS regulating level at full
load
Compensation at VS
UCC28712
103
UCC28713
206
mV
NTC INPUT
VNTCTH
NTC shut-down threshold
Fault UVLO cycle when below this
threshold
UCC28711
UCC28712
UCC28713
0.9
0.95
1
V
INTC
NTC pullup current
Current out of pin
UCC28711
UCC28712
UCC28713
90
105
125
µA
7.6 Typical Characteristics
VDD = 25 V, unless otherwise noted.
10
10
IRUN, VDD = 25V
Run State
1
IVDD - Bias Supply Current (mA)
IVDD - Bias Supply Current (mA)
1
Wait State
0.1
/\
\/ VDD Turn-Off
VDD Turn-On
0.01
Start State
IWAIT, VDD = 25V
0.1
ISTART, VDD = 18V
0.01
0.001
0.001
0.0001
0.0001
0
5
10
15
20
25
30
35
-50
-25
0
25
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75
100
125
C002
C001
Figure 1. Bias Supply Current vs. Bias Supply Voltage
6
50
TJ - Temperature (oC)
VDD - Bias Supply Voltage (V)
Figure 2. Bias Supply Current vs. Temperature
Copyright © 2012–2017, Texas Instruments Incorporated
Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713
UCC28710, UCC28711, UCC28712, UCC28713
www.ti.com
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
Typical Characteristics (continued)
VDD = 25 V, unless otherwise noted.
4.12
300
4.1
IVSLRUN
VS Line Sense Current ( A)
VVSR - VS Regulation Voltage (V)
250
4.08
4.06
4.04
4.02
4
200
150
100
IVSLSTOP
3.98
50
3.96
3.94
0
-50
-25
0
25
50
TJ - Temperature
75
100
125
-50
-25
0
(oC)
25
50
75
100
C003
Figure 3. VS Regulation Voltage vs. Temperature
C004
Figure 4. VS Line Sense Current vs. Temperature
210
350
205
345
VCCR - Constant Current Regulating Level (mV)
VCST(min) - Minimum CS Threshold Voltage (mV)
125
TJ - Temperature (oC)
200
195
190
185
180
175
170
340
335
330
325
320
315
310
-50
-25
0
25
50
TJ - Temperature
75
100
125
-50
-25
0
(oC)
25
50
75
100
125
TJ - Temperature (oC)
C005
Figure 5. Minimum CS Threshold vs. Temperature
C006
Figure 6. Constant Current Regulating Level vs.
Temperature
775
34
VDRV = 8 V, VVDD = 9 V
32
725
IDRS - DRV Source Current (mA)
fSW(min) - Minimum Switching Frequency (Hz)
750
700
675
650
625
30
28
26
24
600
22
575
550
20
-50
-25
0
25
50
75
100
125
-50
TJ - Temperature (oC)
-25
0
25
50
75
C007
125
C008
VDRV = 8 V
Figure 7. Minimum Switching Frequency vs. Temperature
Copyright © 2012–2017, Texas Instruments Incorporated
100
TJ - Temperature (oC)
VVDD = 9 V
Figure 8. DRV Source Current vs. Temperature
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SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
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Typical Characteristics (continued)
VDD = 25 V, unless otherwise noted.
120
115
0.98
INTC - NTC Pull-Up Current ( A)
VNTCTH - NTC Shutdown Threshold Voltage (V)
1.00
0.96
0.94
0.92
110
105
100
95
0.90
90
-50
-25
0
25
50
TJ - Temperature
75
100
125
-50
-25
0
(oC)
25
50
75
100
C009
C010
Figure 10. NTC Pull-Up Current vs. Temperature
4.68
320
4.66
280
4.64
240
IHV - HV Start-Up Current ( A)
VOVP - VS Over-Voltage Threshold (V)
Figure 9. NTC Shutdown Threshold Voltage vs. Temperature
4.62
4.60
4.58
4.56
4.54
200
160
120
80
40
4.52
0
-50
-25
0
25
50
TJ - Temperature
75
100
125
(oC)
-50
-25
0
25
Figure 11. VS Overvoltage Threshold vs. Temperature
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50
75
100
125
TJ - Temperature (oC)
C011
8
125
TJ - Temperature (oC)
C012
Figure 12. HV Start-Up Current vs. Temperature
Copyright © 2012–2017, Texas Instruments Incorporated
Product Folder Links: UCC28710 UCC28711 UCC28712 UCC28713
UCC28710, UCC28711, UCC28712, UCC28713
www.ti.com
SLUSB86C – NOVEMBER 2012 – REVISED JUNE 2017
8 Detailed Description
8.1 Overview
The UCC2871x family is a flyback power supply controller which provides accurate voltage and constant current
regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The controller
operates in discontinuous conduction mode with valley-switching to minimize switching losses. The modulation
scheme is a combination of frequency and primary peak current modulation to provide high conversion efficiency
across the load range. The control law provides a wide-dynamic operating range of output power which allows
the power designer to achieve the