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參數(shù)資料
| 型號： | TPS65166RHAR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC40 |
| 封裝： | 6 X 6 MM, GREEN, PLASTIC, M0-220VJJD-2, QFN-40 |
| 文件頁數(shù)： | 9/45頁 |
| 文件大?。?/td> | 3690K |
| 代理商： | TPS65166RHAR |
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Start-Up Sequencing
EN2
Vlogic
VOFFE
EN1
VIN
VS
VONE
PG
VSS
GD
GDok
DLY1
DLY2
DLY2<DLY1
DLY2>DLY1
PowerGoodfor
ScanDriveIC
Power Good Output
www.ti.com.......................................................................................................................................................................................... SLVS976 – SEPTEMBER 2009
The buck converter detects a short circuit if FB2 falls below 400 mV and the whole device except the buck
converter itself is shut down as if EN2 would be disabled. The switching frequency of the buck converter is
reduced to 1/4th of the normal operation frequency. If the short is removed the buck converter will start operation
again and the whole device auto recovers to normal operation by doing startup sequencing as if EN2 would be
enabled.
The negative buck boost converter VOFFE has a short circuit protection where the switch current is limited to
typically 300 mA and switching frequency is reduced to about 150 kHz. A short is detected if VOFFE rises above
-3 V.
The shunt regulator Vss has no short circuit protection.
The device has adjustable start-up sequencing to provide correct sequencing as required by the display.
Figure 23. Power Up Sequencing
EN1 enables the buck converter.
EN2 enables the negative buck boost converter VOFFE and Vss at the same time. DLY1 sets the delay time for the
boost converter Vs and DLY2 sets the delay time for VONE. VONE does not start until DLY1 is elapsed. For
simultaneous startup of Vs and VONE, DLY2 should be set to 0 by not connecting the DLY2 pin. Once VS and
VONE are in regulation, PG goes high impedance to enable the scan driver IC.
The power good output PG is an open drain output with typically 450
resistance and requires a pull-up resistor
to the 3.3V rail. The power good goes high impedance when the Vs and VONE voltage rails are in regulation and
provides an enable signal for the external scan driver IC. Once power good is high impedance, the signal is
latched until Vs or VONE detect a short circuit.
The resulting maximum PG voltage if PG is low is dependent on R22 connection voltage (Vlogic) and R22 value.
To calculate maximum resulting PG voltage for power bad signal use following formula:
Copyright 2009, Texas Instruments Incorporated
17
Product Folder Link(s): TPS65166
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS65167ARHAR | 功能描述:其他電源管理 Compact LCD Bias Sply 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 |
| TPS65167ARHARG4 | 功能描述:其他電源管理 Compact LCD Bias Sply 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 |
| TPS65167EVM-277 | 功能描述:電源管理IC開發(fā)工具 TPS65167 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS65167RHAR | 功能描述:其他電源管理 Compact LCD Bias Supply 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 |
| TPS65167RHARG4 | 功能描述:LCD 驅(qū)動器 12V/3.5A(I/O) 4-CH Multi-Converter 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 |
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