參數(shù)資料
型號(hào)： TPS65171RHAR
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 4 A SWITCHED CAPACITOR REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40
文件頁(yè)數(shù)： 9/46頁(yè)
文件大?。?/td> 3644K
代理商： TPS65171RHAR
log
_
450
22
ic
PG
low
V
R
W
=
W +
www.ti.com
SLVSA22A – OCTOBER 2009 – REVISED JANUARY 2010
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.
Start-Up Sequencing
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.
Power Good Output
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:
(1)
Copyright 2009–2010, Texas Instruments Incorporated
17
Product Folder Link(s): TPS65171
相關(guān)PDF資料
PDF描述
TPS65182BRGZT POWER SUPPLY SUPPORT CKT, PQCC48
TPS65182RGZT POWER SUPPLY SUPPORT CKT, PQCC48
TPS65182RGZR POWER SUPPLY SUPPORT CKT, PQCC48
TPS65185RSLT POWER SUPPLY SUPPORT CKT, PQCC48
TPS65200YFFR 1-CHANNEL POWER SUPPLY SUPPORT CKT, BGA36
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(jī)/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(lèi)型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤(pán) 供應(yīng)商器件封裝:56-VQFN（7x7） 標(biāo)準(zhǔn)包裝:1
TPS65175RSHR 功能描述:LCD 驅(qū)動(dòng)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(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
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
TPS65176RHDT 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*