- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄379479 > UCC3976TRPW (Texas Instruments, Inc.) Low consumption voltage and current controller for battery chargers and adaptors PDF資料下載
參數(shù)資料
| 型號(hào)： | UCC3976TRPW |
| 廠商： | Texas Instruments, Inc. |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low consumption voltage and current controller for battery chargers and adaptors |
| 中文描述： | 鎮(zhèn)流器/背光控制器/驅(qū)動(dòng)器| TSSOP封裝| 8引腳|塑料 |
| 文件頁(yè)數(shù)： | 17/28頁(yè) |
| 文件大?。?/td> | 433K |
| 代理商： | UCC3976TRPW |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)當(dāng)前第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)
SLUS499A
–
NOVEMBER 2001
–
REVISED JANUARY 2002
17
www.ti.com
APPLICATION INFORMATION
half-bridge operation and inductor selection
In the half-bridge topology, the external inductor and piezoelectric capacitance form a low-pass filter between
the common switch node of the external MOSFETs and the piezoelectric primary as shown on the front page.
The L-C filter formed by these components should pass the resonant frequency, required by the piezoelectric
transformer, yet attenuate higher harmonic components. The choice of inductor will require bench
measurements and modeling of the resonant circuit:
An inductor value that is too low (high L-C resonant frequency) will result in non-sinusoidal primary
waveforms since higher order harmonics are allowed though the filter. A low value also allows excess
circulating currents, impacting efficiency.
An inductor value that results in a L-C resonant frequency close to the resonant frequency of the
piezoelectric transformer causes interference, making control of the primary voltage difficult. The
interference occurs since the gain of the L-C tank depends heavily on load in this region of operation.
An inductor value that is too large causes an attenuation of the input voltage, increasing the gain
requirements of the piezoelectric transformer and/or the system.
As an example, suppose a piezoelectric transformer is selected that operates efficiently at 67 kHz (similar to
Figure 9) and has 0.2-
μ
F of primary capacitance. An external inductance value of 15
μ
H gives a L-C filter corner
frequency of 92 kHz. The L-C circuit would provide little attenuation at 67 kHz yet attenuate higher harmonics.
Figure 13
f
–
Frequency
–
kHz
V
–
–
UCC3976 L-C TANK FREQUENCY
vs
LAMP LOADS
0
50
150
200
250
300
100
0
1
1.5
2.0
0.5
fPZT = 67 kHz
LAMP LOAD
150 k
100 k
50 k
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| UCC35705EVM | UCC35705 Evaluation Module(UCC35705評(píng)估模塊) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3977PW | 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| UCC3977PWG4 | 功能描述:LCD 驅(qū)動(dòng)器 Multi-Topology Piezoelectric RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| UCC3977PWR | 制造商:Texas Instruments 功能描述: |
| UCC40V680UF | 制造商:United Chemi-Con 功能描述:AL040X768 85C 13X31 |
| UCC500-30GM-IU-V1 B540 | 制造商:PEPPERL+FUCHS 功能描述:Sensor, Ultrasonic, Chem Resistant, 094792 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。