UCC2819
UCC2819 is Power Factor Preregulator manufactured by Texas Instruments.
- Part of the UCC3819 comparator family.
- Part of the UCC3819 comparator family.
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 Bi CMOS 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
VAOUT 7 VSENSE 11
VAI 13 VFF 8
IAC 6 MOUT 5
VOLTAGE
- ERROR AMP +
÷X MULT X X2
MIRROR 2:1
1.9 V
- +
0.33 V
CURRENT AMP
- +
ENABLE
ZERO POWER
- + 8.0 V + OVP
- - PWM + OSC
PWM LATCH RR
OSCILLATOR
UVLO 10.2 V/9.7 V
4 3 12 14 CAI CAOUT RT CT
16 DRVOUT
1 GND
- 2 PKLMT +
UDG-01009
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.
.ti....
