參數(shù)資料
型號: TPS65167ARHARG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 4.9 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
封裝: 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, QFN-40
文件頁數(shù): 19/41頁
文件大?。?/td> 1270K
代理商: TPS65167ARHARG4
www.ti.com
CTRL
VGH
VH
VL
T
td
Timing:
1. tdissetbythecapacitorCE
2.TheslopeissetbytheresistorRE
3. VL issetbythevoltageappliedtoVD
High Voltage Stress Test (positive charge pump)
Negative Charge Pump Driver
SLVS760C – APRIL 2007 – REVISED MARCH 2008
With CTRL=high, Q4 is turned on, and the charge pump output voltage is present at VGH. When the CTRL pin is
pulled low, then Q4 is turned off, and Q5 is turned on discharging VGH. The slope and time for discharging VGH
is determined by the LC Display capacitance and the termination on DRN. It is not required or recommended to
connect an additional output capacitor on VGH. There are three options available to terminate the DRN pin. The
chosen solution depends mainly on the LC Display capacitance and required overall converter efficiency.
Figure 28. High Voltage Switch (Gate Voltage Shaping) Timing Diagram
Option 1 in Figure 27 discharges VGH to Vs. The lower the resistor the faster the discharge.
Option 3 in Figure 27 constantly draws current from Vs due to the voltage divider connected to Vs. The
advantage of this solution is that the low level voltage VL is given by the voltage divider assuming the feedback
resistor values are small and allow to discharge the LC Display capacitance during the time, toff. Therefore, the
solution is not recommended for large display panels since the feedback divider resistors needs to be selected
too low which draws too much current from Vs.
Option 2 does not draw any current from Vs and; therefore, is better in terms of converter efficiency. The voltage
level VL where VGH is discharge to is determined by the LC Display capacitance, the resistor connected to DRN
and the off time, toff. The lower the resistor value connected to DRN the lower the discharge voltage level VL.
Adding any additional output capacitance to VGH is not recommend. If more capacitance is required, it needs to
be added to POUT instead.
The TPS65167 incorporates a high voltage stress test where the output voltage of the boost converter Vs and
the positive charge pump POUT are set to a higher output voltage compared to the nominal programmed output
voltage. The High Voltage Stress test is enabled by pulling HVS pin to high. This sets POUT, respectively VGH
to 30 V, and the output voltage of the boost converter Vs is programmed to a higher voltage determined by the
resistor connected to RHVS. With HVS = high, the RHVS pin is pulled to GND which sets the voltage for the
boost converter during High Voltage Stress.
The TPS65167A has the high voltage stress test for the positive charge pump POUT disabled. The high voltage
stress test function is only enabled for the boost converter Vs.
The negative charge pump provides a regulated output voltage set by the external resistor divider. The negative
charge pump inverts the input voltage applied to the SUPN pin and regulates it to the programmed voltage.
26
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS65167 TPS65167A
相關(guān)PDF資料
PDF描述
TPS65167RHAT 4.9 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
TPS65170RHDT 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC28
TPS65171RHAR 4 A SWITCHED CAPACITOR REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
TPS65182BRGZT POWER SUPPLY SUPPORT CKT, PQCC48
TPS65182RGZT POWER SUPPLY SUPPORT CKT, PQCC48
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
TPS65167RHAT 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
TPS65167RHATG4 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