- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379479 > UCC38517 (Texas Instruments, Inc.) ADVANCED PFC/PWM COMBINA CONTROLLERS PDF資料下載
參數(shù)資料
| 型號： | UCC38517 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | ADVANCED PFC/PWM COMBINA CONTROLLERS |
| 中文描述： | 高級式PFC /脈寬調(diào)制COMBINA控制器 |
| 文件頁數(shù)： | 2/39頁 |
| 文件大?。?/td> | 725K |
| 代理商： | UCC38517 |
第1頁當(dāng)前第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁
SLUS517B DECEMBER 2002 REVISED AUGUST 2004
2
www.ti.com
DESCRIPTION (CONTINUED)
The transient response of the circuit is enhanced by allowing a much faster charge/discharge of the voltage
amplifier output capacitance when the output voltage falls outside a certain regulation window. A number of
additional features such as UVLO circuit with selectable hysteresis levels, an accurate reference voltage for the
voltage amplifier, zero power detect, OVP/enable, peak current limit, power limiting, high-current output gate
driver characterize the PFC section.
The PWM section features peak current mode control (with a ramp signal available to add slope compensation),
programmable soft-start, accurate maximum duty cycle clamp, peak current limit and high-current output gate
driver. The oscillator for the combination controller is available in two versions. In UCC28510, UCC28511,
UCC28512, and UCC28513, the PWM and the PFC circuits are switched at the same frequency. In the
UCC28514, UCC28515, UCC28516, and UCC28517, the PWM stage frequency is twice that of the PFC
frequency. The PWM stage is suppressed until the PFC output has reached 90% of its programmed value during
startup. During line dropout and turn off, the device allows the PWM stage to operate until the PFC output has
dropped to 47% (UCC28512, UCC28513, UCC28516, and UCC28517) or 71% (UCC28510, UCC28511,
UCC28514, and UCC28515) of its nominal value. See available options table on page 1 for a summary of
options.
The UCC28510 family also features leading-edge modulation for the PFC stage and trailing-edge modulation
for the PWM stage in order to reduce the ripple current in the boost output capacitor. The current amplifier
implementation associated with this scheme also results in better noise immunity.
Available in 20-pin N and DW packages.
SIMPLIFIED APPLICATION DIAGRAM
12
3
16
18
10
5
7
2
UCC2851X
GT1
VSENSE
ISENSE1
IAC
GT2
VREF
VERR
RT
+
D1
VAC
15
14
13
11
17
19
20
PWRGND
VAOUT
1
6
VFF
MOUT
CAOUT
PKLMT
SS2
8
9
D_MAX
CT_BUFF
GND
ISENSE2
VCC
REF
PRIMARY
SECONDARY
+
VOUT
+
4
REF
BIAS
RECT
+
PWM
VLOOP
Z
Z
Z
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UCC28517N | ADVANCED PFC/PWM COMBINATION CONTROLLERS |
| UCC2882-1 | Average Current Mode Synchronous Controller With 5-Bit DAC |
| UCC2882 | Average Current Mode Synchronous Controller With 5-Bit DAC |
| UCC2882- | Average Current Mode Synchronous Controller With 5-Bit DAC |
| UCC2975TRPW | Precision 500 mA regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC38531 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Universal Serial Bus Power Controller |
| UCC3857 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Isolated Boost PFC Preregulator Controller |
| UCC3857N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:IC-PFC PRE-REGULATOR |
| UCC3858 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency, High Power Factor Preregulator |
| UCC3858J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。