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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： | 9/36頁 |
| 文件大小： | 1034K |
| 代理商： | TPS65162RGZR |
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BOOST CONVERTER
500kHz/
750KHz
Oszillator
D
S
VFB
1.268V
Comparator
GM Amplifier
Sawtooth
Generator
VFB
1.268V
VIN
SW
PGND2
PGND3
Q1
GM Amplifier
LowGain
Currentlimit
and
SoftStart
D
S
Q2
SUP
FREQ
Clock
COMP
FB
I
D
L
Y
Vref
SS
Vref
ControlLogic
Overvoltage
Comparator
OVP
Softstart
D
S
SUP
SWI
SWO
Controllogic
VdsSensor
D
S
EN
www.ti.com ............................................................................................................................................................... SLVS771B – MAY 2007 – REVISED JUNE 2008
The TPS65162 boost converter block is shown in Figure 21. The boost converter operates with PWM (Pulse
Width Modulation) at a fixed switching frequency of 500 kHz or 750 kHz, selected by the FREQ pin. The
converter uses an unique fast-response, voltage-mode controller scheme with input-voltage feedforward. This
achieves excellent line and load regulation (0.03%/A load regulation typical), and allows the use of small external
components. To add more flexibility to the selection of external component values, the device uses external loop
compensation. Although the boost converter looks like a non-synchronous boost converter topology operating in
discontinuous-conduction mode under a light load, the TPS65162 remains in continuous-conduction mode even
under light load currents. (Figure 4) This is achieved with a novel architecture using an external Schottky diode
with an integrated MOSFET in parallel connected between the SW pin and the SUP pin. This MOSFET allows
the current to go below ground, which is the case under light load conditions. For this use, a small integrated
P-Channel MOSFET (Q2) with typically 9
RDSon is sufficient. When the inductor current is positive, the
external Schottky diode, with the lower forward voltage, carries the current. This causes the converter to operate
with a fixed frequency in continuous-conduction mode over the entire load-current range. This avoids ringing on
the switch pin as seen with a standard non-synchronous boost converter, and allows a simpler compensation
circuit for the boost converter.
Figure 21. Boost Converter Block TPS65162
Copyright 2007–2008, Texas Instruments Incorporated
17
Product Folder Link(s): TPS65162
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相關代理商/技術參數 |
參數描述 |
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| 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 |
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