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UCC28070-Q1 Datasheet Preview

UCC28070-Q1 Datasheet

PFC Controller

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UCC28070-Q1
www.ti.com
SLUSA71A JULY 2010 REVISED JUNE 2011
INTERLEAVING CONTINUOUS CONDUCTION MODE PFC CONTROLLER
Check for Samples: UCC28070-Q1
FEATURES
1
Qualified for Automotive Applications
Interleaved Average Current-Mode PWM
Control with Inherent Current Matching
Advanced Current Synthesizer Current
Sensing for Superior Efficiency
Highly-Linear Multiplier Output with Internal
Quantized Voltage Feed-Forward Correction
for Near-Unity PF
Programmable Frequency (30 kHz to 300 kHz)
Programmable Maximum Duty-Cycle Clamp
Programmable Frequency Dithering Rate and
Magnitude for Enhanced EMI Reduction
Magnitude: 3 kHz to 30 kHz
Rate: Up to 30 kHz
External Clock Synchronization Capability
Enhanced Load and Line Transient Response
through Voltage Amplifier Output Slew-Rate
Correction
Programmable Peak Current Limiting
Bias-Supply UVLO, Over-Voltage Protection,
Open-Loop Detection, and PFC-Enable
Monitoring
External PFC-Disable Interface
Open-Circuit Protection on VSENSE and
VINAC pins
Programmable Soft Start
20-Lead TSSOP Package
DESCRIPTION
The UCC28070 is an advanced power factor
correction device that integrates two pulse-width
modulators (PWMs) operating 180° out of phase.
This interleaved PWM operation generates
substantial reduction in the input and output ripple
currents, and the conducted-EMI filtering becomes
easier and less expensive. A significantly improved
multiplier design provides a shared current reference
to two independent current amplifiers that ensures
matched average current mode control in both PWM
outputs while maintaining a stable, low-distortion
sinusoidal input line current.
The UCC28070 contains multiple innovations
including current synthesis and quantized voltage
feed-forward to promote performance enhancements
in PF, efficiency, THD, and transient response.
Features including frequency dithering, clock
synchronization, and slew rate enhancement further
expand the potential performance enhancements.
The UCC28070 also contains a variety of protection
features including output over-voltage detection,
programmable peak-current limit, under-voltage
lockout, and open-loop protection.
Simplified Application Diagram
V
IN
L1
D1
V
OUT
From Ixfrms
12V to 21V
To CSB
C
CDR
1 CDR
DMAX 20
R
DMX
R
RDM
2 RDM
RT 19
R
R RT
A
3 VAO
SS 18
C
SS
4 VSENSE GDB 17
R
S
5 VINAC GND 16
R
IMO
6 IMO
VCC 15
R
B
R
SYN
7 RSYNTH
GDA 14
8 CSB
VREF 13
L2
9 CSA CAOA 12
10 PKLMT CAOB 11
To CSA
C
ZV
C
PV
R
ZV
R
PK1
R
PK2
C
REF
C
PC
C
ZC
C
PC
C
ZC
R
ZC
R
ZC
R
S
C
OUT
T1
M1
D2
T2
R
A
M2
R
B
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 20102011, Texas Instruments Incorporated




etcTI

UCC28070-Q1 Datasheet Preview

UCC28070-Q1 Datasheet

PFC Controller

No Preview Available !

UCC28070-Q1
SLUSA71A JULY 2010 REVISED JUNE 2011
www.ti.com
TA
40°C to 125°C
TSSOP PW
ORDERING INFORMATION
PACKAGE
ORDERABLE PART NUMBER
Reel of 2000
UCC28070QPWRQ1
TOP-SIDE MARKING
28070Q
ABSOLUTE MAXIMUM RATINGS(1) (2) (3) (4)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
Supply voltage: VCC
Supply current: IVCC
Voltage: GDA, GDB
Gate drive current continuous: GDA, GDB
Gate drive current pulsed: GDA, GDB
Voltage: DMAX, RDM, RT, CDR, VINAC, VSENSE, SS, VAO, IMO, CSA, CSB,
CAOA, CAOB, PKLMT, VREF
Current: RT, DMAX, RDM, RSYNTH
Current: VREF, VAO, CAOA, CAOB, IMO
Operating junction temperature, TJ
Storage temperature, TSTG
Lead temperature (10 seconds)
LIMIT
22
20
0.5 to VCC+0.3
+/0.25
+/0.75
0.5 to +7
0.5
10
40 to +140
65 to +150
260
UNIT
V
mA
V
A
A
V
mA
mA
°C
°C
(1) These are stress limits. Stress beyond these limits may cause permanent damage to the device. Functional operation of the device at
these or any conditions beyond those indicated under RECOMMENDED OPERATING CONDITIONS is not implied. Exposure to
absolute maximum rated conditions for extended periods of time may affect device reliability.
(2) All voltages are with respect to GND.
(3) All currents are positive into the terminal, negative out of the terminal.
(4) In normal use, terminals GDA and GDB are connected to an external gate driver and are internally limited in output current.
DISSIPATION RATINGS
PACKAGE
20-Pin TSSOP (PW)
THERMAL
IMPEDANCE
JUNCTION-TO-
AMBIENT
125°C/W (1) and (2)
TA = 25°C POWER
RATING
TA = 85°C POWER RATING
800 mW (1)
320 mW (1)
TA = 125°C POWER
RATING
120 mW (1)
(1) Thermal resistance is a strong function of board construction and layout. Air flow reduces thermal resistance. This number is only a
general guide.
(2) Thermal resistance calculated with a low-K methodology.
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
VCC Input Voltage (from a low-impedance source)
VREF Load Current
VINAC Input Voltage Range
IMO Voltage Range
PKLMT, CSA, CSB Voltage Range
RSYNTH Resistance (RSYN)
RDM Resistance (RRDM)
MIN
VUVLO + 1 V
0
0
0
15
30
MAX
21
2
3
3.3
3.6
750
330
UNIT
V
mA
V
kΩ
2 Copyright © 20102011, Texas Instruments Incorporated


Part Number UCC28070-Q1
Description PFC Controller
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