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參數(shù)資料
| 型號： | TPS65170RHDT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-28 |
| 文件頁數(shù)： | 15/35頁 |
| 文件大?。?/td> | 4698K |
| 代理商： | TPS65170RHDT |
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SLVSA27 – OCTOBER 2009
www.ti.com
A collector capacitor in the range 100nF to 1F is suitable for most applications. Larger values are more suitable
for high current applications, but can affect stability.
A combination of COUT = 10F, CFLY = 1F, and CCOLLECTOR = 100nF is a good starting point for most
applications (the final values can be optimized on a case-by-case basis if necessary).
NEGATIVE CHARGE PUMP
The negative charge pump controller uses an external NPN transistor to regulate an external charge pump
circuit. The IC is optimized for use with transistors having a DC gain (hFE) in the range 100 to 300; however, it is
possible to use transistors outside this range, depending on the application requirements. Regulation of the
charge pump is achieved by using the external transistor as a controlled current source whose output depends
on the voltage applied to the FBN pin: the higher the transistor current the greater the charge transferred to the
output during each switching cycle and therefore the higher (i.e., the more negative) the output voltage. The
internal block diagram of the negative charge pump is shown in Figure 29 and a typical application circuit in
Figure 29. Negative Charge Pump Internal Block Diagram
Figure 30. Negative Charge Pump Application Circuit
The TPS65170 contains a circuit to protect the negative charge pump against short circuits on its output. A short
circuit condition is detected as long as the FBN pin remains above 1.65V, during which time the charge pump's
output current is limited.
22
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s) :TPS65170
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| TPS65171RHAR | 功能描述:LCD 驅(qū)動器 Compact LCD Bias RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率: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 |
| TPS65175ARSHR | 制造商:Texas Instruments 功能描述:LCD BIAS CHIP AND LEVEL SHIFTE 制造商:Texas Instruments 功能描述:IC BIAS PWR SUPP FOR LCD 56VQFN 制造商:Texas Instruments 功能描述:Fully Programmable LCD Bias IC |
| TPS65175CRSHR | 功能描述:LCD TV/Monitor PMIC 56-VQFN (7x7) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 應(yīng)用:LCD 電視機/監(jiān)控器 電流 - 電源:- 電壓 - 電源:8.6 V ~ 14.7 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商器件封裝:56-VQFN（7x7） 標準包裝:1 |
| TPS65175RSHR | 功能描述:LCD 驅(qū)動器 Fully Programmable LCD Bias IC RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率: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 |
| TPS65176RHDR | 功能描述:其他電源管理 LCD BIAS IC FOR TV RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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