UCC2819, UCC3819
PROGRAMMABLE OUTPUT
POWER FACTOR PREREGULATOR
SLUS482B - APRIL 2001 鈭?REVISED DECEMBER 2004
D
Controls Boost Preregulator to Near-Unity
D
D
D
D
D
D
D
D
D
D
D
Power Factor
World Wide Line Operation
Over-Voltage Protection
Accurate Power Limiting
Average Current Mode Control
Improved Noise Immunity
Improved Feed-Forward Line Regulation
Leading Edge Modulation
150-碌A Typical Start-Up Current
Low-Power BiCMOS Operation
10.8-V to 17-V Operation
Programmable Output Voltage (Tracking
Boost Topology)
D, DW, N, and PW PACKAGES
(TOP VIEW)
GND
PKLMT
CAOUT
CAI
MOUT
IAC
VAOUT
VFF
DRVOUT
VCC
CT
VAI
RT
VSENSE
OVP/EN
VREF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
description
The UCC2819/UCC3819 provides all the functions necessary for active power factor corrected preregulators.
The controller achieves near unity power factor by shaping the ac-input line current waveform to correspond
to that of the ac-input line voltage. Average current mode control maintains stable, low distortion sinusoidal line
current.
Designed in Texas Instrument鈥檚 BiCMOS process, the UCC3819 offers new features such as lower start-up
current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry and a leading-edge
modulation technique to reduce ripple current in the bulk capacitor.
The UCC3819 allows the output voltage to be programmed by bringing out the error amplifier noninverting input.
Available in the 16-pin D, DW, N, and PW packages.
block diagram
VCC
15
OVP/EN 10
7.5 V
REFERENCE
9
VREF
1.9 V
VAOUT
7
VOLTAGE
ERROR AMP
X
梅
MULT
X
X2
CURRENT
AMP
鈭?/div>
+
鈭?/div>
+
0.33 V
ENABLE
ZERO POWER
UVLO
10.2 V/9.7 V
VCC
OVP
16 DRVOUT
S
Q
PWM
LATCH
R
R
1
CLK
GND
PKLMT
鈭?/div>
+
VSENSE 11
VAI 13
鈭?/div>
+
8.0 V
鈭?/div>
+
OSC
PWM
+
鈭?/div>
VFF
8
MIRROR
2:1
CLK
IAC
MOUT
6
5
4
CAI
3
OSCILLATOR
鈭?/div>
+
2
12
14
CT
UDG-01009
CAOUT RT
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
錚?/div>
2004, Texas Instruments Incorporated
www.ti.com
1
UCC2819 PDF文件相關型號
UCC2819DW,UCC2819PW,UCC3819,UCC3819DW,UCC3819PW
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