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UCC2819DWTR

更新时间： 2024-11-20 13:02:03
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德州仪器 - TI 调节器输出元件
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UCC2819DWTR 数据手册

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SLUS482B - APRIL 2001 − REVISED DECEMBER 2004  
D
Controls Boost Preregulator to Near-Unity  
Power Factor  
D, DW, N, and PW PACKAGES  
(TOP VIEW)  
D
D
D
D
D
D
D
D
D
D
D
World Wide Line Operation  
Over-Voltage Protection  
GND  
PKLMT  
CAOUT  
CAI  
DRVOUT  
VCC  
CT  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
Accurate Power Limiting  
Average Current Mode Control  
Improved Noise Immunity  
VAI  
MOUT  
IAC  
RT  
Improved Feed-Forward Line Regulation  
Leading Edge Modulation  
11 VSENSE  
10 OVP/EN  
VAOUT  
VFF  
9
VREF  
150-µA Typical Start-Up Current  
Low-Power BiCMOS Operation  
10.8-V to 17-V Operation  
Programmable Output Voltage (Tracking  
Boost Topology)  
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’s 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  
ENABLE  
−
+
UVLO  
VAOUT  
7
10.2 V/9.7 V  
ZERO POWER  
0.33 V  
VCC  
−
+
VOLTAGE  
ERROR AMP  
VSENSE 11  
VAI 13  
−
+
CURRENT  
AMP  
8.0 V  
PWM  
OVP  
Q
+
−
X
÷
MULT  
−
+
16 DRVOUT  
−
+
X
S
2
VFF  
8
X
PWM  
LATCH  
OSC  
CLK  
R
R
MIRROR  
2:1  
1
2
GND  
CLK  
IAC  
6
5
PKLMT  
−
+
OSCILLATOR  
MOUT  
4
3
12  
14  
UDG-01009  
CAI  
CAOUT RT  
CT  
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.  
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Copyright 2004, Texas Instruments Incorporated  
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www.ti.com  
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