- 您現在的位置：買賣IC網 > PDF目錄98285 > TPS65162RGZR (TEXAS INSTRUMENTS INC) 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC48 PDF資料下載
參數資料
| 型號： | TPS65162RGZR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC48 |
| 封裝： | 7 X 7 MM, PLASTIC, VQFN-48 |
| 文件頁數： | 15/36頁 |
| 文件大小： | 1034K |
| 代理商： | TPS65162RGZR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
NEGATIVE CHARGE PUMP
Vout + *VREF
R3
R4
+ *1.265 V
R3
R4
(8)
500 kHz/
750 KHz
Oscillator
Control
Logic
Softstart
Vref
0V
VIN
DRVN
FBN
Q7
GND
ID
R
VN
GATE VOLTAGE SHAPING
SLVS771B – MAY 2007 – REVISED JUNE 2008 ............................................................................................................................................................... www.ti.com
The negative charge pump provides a regulated output voltage set by the external resistor divider. The
TPS65162 negative charge pump block is shown in Figure 23. The negative charge pump operates very similar
to the positive charge pump, with the difference that it runs from the input voltage VIN. The maximum negative
output voltage is VGL=(–VIN)+Vdrop. Vdrop is the voltage drop across the external diodes and internal
charge-pump MOSFETs.
The output voltage is calculated by:
Since the reference-output driver current should not exceed 30uA (typical), the lower feedback resistor value R4
should be in a range of 40 k
to 120 k. Overall feedback resistance should be in the range from 500 k to 1
M
. The negative charge pump requires two external Schottky diodes. The peak current rating of the Schottky
diode must be twice the load current of the output. For a 20-mA output current, the dual Schottky diode BAV99 is
a good choice.
Figure 23. Negative Charge Pump Block TPS65162
The gate voltage shaping reduces the flickering effect of an LCD panel, and isolates VGHM from the source
voltage VGH. For correct operation of this block, it is not recommend to connect an output capacitor to VGHM.
To reduce the voltage ripple on VGHM, add more capacitors on VGH. The TPS65162 gate voltage shaping block
is shown in Figure 24. The corresponding timing diagram is shown in Figure 26. The gate voltage shaping block
responds to VFLK under the following conditions:
The device is enabled with VDPM = high
The input voltage is above the undervoltage lockout
The positive charge pump is in regulation
When VGH is pulled below its power-good level, Q1 and Q2 are turned off and VGHM is discharged via the 1-k
resistor over Q3. With VFLK = high, Q1 and Q4 are turned on and Q2 is turned off. VGH is present at VGHM
when Q1 is on, and at the same time, the capacitor connected to the CE pin is discharged by Q4 to GND. When
22
Copyright 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): TPS65162
相關PDF資料 |
PDF描述 |
|---|---|
| TPS65167ARHARG4 | 4.9 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40 |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS65162RGZRG4 | 功能描述:LCD 驅動器 12V/2.8A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量: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 |
| TPS65163RGZR | 功能描述:其他電源管理 LCD Bias with Int 9Ch Level Shifter 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65163RGZT | 功能描述:其他電源管理 LCD Bias with Int 9Ch Level Shifter 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| TPS65165EVM-233 | 功能描述:電源管理IC開發工具 TPS65165 Evaluation Module RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS65165RSBR | 功能描述:LCD Gamma緩沖器 Compact LCD Bias IC RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
發布緊急采購，3分鐘左右您將得到回復。