- 您現(xiàn)在的位置：買賣IC網 > PDF目錄379479 > UCC2977TRPW (Texas Instruments, Inc.) Precision 500 mA regulators PDF資料下載
參數(shù)資料
| 型號： | UCC2977TRPW |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Precision 500 mA regulators |
| 中文描述： | 鎮(zhèn)流器/背光控制器/驅動器| TSSOP封裝| 8引腳|塑料 |
| 文件頁數(shù)： | 2/28頁 |
| 文件大?。?/td> | 433K |
| 代理商： | UCC2977TRPW |
第1頁當前第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
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
2
www.ti.com
description (continued)
A half-bridge PZT converter, using the UCC3976 is shown in Figure 1. External P- and N-channel MOSFETs
are driven out of phase at a fixed 50% duty cycle with anti-cross conduction circuitry provided by the controller.
The half-bridge topology uses only a single magnetic component (LRES) reducing board area. As explained
in the applications section of this datasheet, regulation of lamp current is achieved by controlling the operating
frequency of the system.
The UCC3977 is designed to control a resonant push-pull topology as shown in Figure 2. This controller
alternately drives external N-channel MOSFETs at 50% duty cycle. The push-pull topology requires two external
inductors (L1 and L2), but has the advantage of providing increased voltage across the piezoelectric transformer
primary. In this case a small overlap is provided to the gate drives, assuring an uninterrupted path for inductor
current.
UDG
–
01097
RANGE
1
3
2
4
8
6
7
5
OPEN/SD
OSC
COMP
FB
VDD
OUT1
OUT2
GND
CFB
RFBDFB
CCFL
RCS
COSC
ROSC
RHV
RCNT
VDD
COPEN
ROPEN
DOPEN
SHUTDOWN
UCC3977
L1
PIEZO XFMR
N1
N2
L2
VCNT
Figure 2. UCC3977 Based CCFL Power Supply Using a Resonant Push-Pull Topology
For piezoelectric transformer applications requiring additional gain, a resonant flyback topology can be
implemented using the UCC3975. As shown in Figure 3, a magnetic transformer (T1) provides a stepped up
voltage to the piezoelectric transformer primary. When compared to a traditional high-voltage transformer used
in a CCFL application, T1 is small and low profile because of its reduced turns ratio and voltage rating. In the
resonant flyback application, a single switch is driven at 50% duty cycle producing a half wave rectified sinusoid
at the piezoelectric transformer primary.
相關PDF資料 |
PDF描述 |
|---|---|
| UCC3976TRPW | Low consumption voltage and current controller for battery chargers and adaptors |
| UCC3977TRPW | BALLAST/BACKLIGHT CONTROLLER/DRIVER|TSSOP|8PIN|PLASTIC |
| UCC35705DGKTR | HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR |
| UCC35706DTR | HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR |
| UCC35706DGKTR | Aluminum Electrolytic Radial Lead High Ripple Capacitor; Capacitance: 330uF; Voltage: 400V; Case Size: 25x50 mm; Packaging: Bulk |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UCC29900PWR | 制造商:Texas Instruments 功能描述: |
| UCC29910AEVM-730 | 功能描述:電源管理IC開發(fā)工具 UCC29910A Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| UCC29910APW | 功能描述:功率因數(shù)校正 IC Buck PFC Controller RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| UCC29910APWR | 功能描述:功率因數(shù)校正 IC Buck PFC Controller RoHS:否 制造商:Fairchild Semiconductor 開關頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel |
| UCC29950D | 功能描述:PFC IC Continuous Conduction (CCM) 87kHz ~ 109kHz 16-SOIC 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):有效 模式:連續(xù)導電（CCM） 頻率 - 開關:87kHz ~ 109kHz 電流 - 啟動:- 電壓 - 電源:11 V ~ 18 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商器件封裝:16-SOIC 標準包裝:40 |
發(fā)布緊急采購，3分鐘左右您將得到回復。