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参数资料
| 型号： | TPS65166RHAR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC40 |
| 封装： | 6 X 6 MM, GREEN, PLASTIC, M0-220VJJD-2, QFN-40 |
| 文件页数： | 24/45页 |
| 文件大小： | 3690K |
| 代理商： | TPS65166RHAR |
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Setting the Output Voltage and Selecting the Feed-Forward Capacitor (Positive Charge Pump)
out
FB4
R14
V
= V
1+
= 1.24 V
1+
R15
÷
÷
è
è
(35)
F B4
V
1.24V
R15 =
=
2.4 k
500
A
500
A
W
m
(36)
out
FB4
V
R14 = R15
1
= R 15
1
V
1.24 V
-
-
÷
÷
è
è
(37)
1
C17 =
2
12 kHz
R14
p
(38)
Base2
Control
Logic
FB4
Error Amplifier
CurrentLimit
&
Softstart
1.24 V
100 mV
Shortcircuit
Comparator
Shortcircuit
Mode
55 A
m
8 mA
PNP Transistor Selection (Positive Charge Pump)
ONE
D1
D2
Q
I
V
= 2
Vs + V
2
V
R
V
D
-
-
-
(39)
SLVS976 – SEPTEMBER 2009.......................................................................................................................................................................................... www.ti.com
To minimize noise a minimum current through the feedback divider of 500
A is recommended. At startup the
device is in short circuit mode with reduced current (typ. 50
A) until the feedback voltage FB4 exceeds 100 mV,
then the device switches to soft-start mode until the output voltage VONE is in regulation. Due to the high output
current and low required voltage drop, high current Schottky diodes with low forward voltage are recommended
for this regulator.
To minimize noise and leakage current sensitivity keep the lower feedback divider resistor R15 between 100
and 4.7k
. See typical application section for charge pump circuit.
Across the upper feedback resistor R14, a bypass capacitor C17 is required. The capacitor is calculated as:
Figure 31. Positive Chargepump Block Diagram
The maximum possible VONE output voltage is calculated as:
With:
Vs = boost converter output voltage
VD1 = Forward voltage of boost converter Schottky diode
VD2 = Forward voltage of charge pump diode for a current of IONE / D
IONE = VONE output current
D = Duty cycle of boost converter (D = 1 – Vin / Vs)
R = Series resistor (if applicable, e.g., 2
for typical application)
VQ = Transistor saturation voltage
As a general recommendation the VONE voltage level in use should be at least 0.5V lower than the calculated
maximum VONE voltage.
30
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TPS65166
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS65167ARHAR | 功能描述:其他电源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| TPS65167ARHARG4 | 功能描述:其他电源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| TPS65167EVM-277 | 功能描述:电源管理IC开发工具 TPS65167 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS65167RHAR | 功能描述:其他电源管理 Compact LCD Bias Supply RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| TPS65167RHARG4 | 功能描述:LCD 驱动器 12V/3.5A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
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