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| 型号： | TPS62101DR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.6 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | GREEN, SOIC-8 |
| 文件页数： | 5/27页 |
| 文件大小： | 537K |
| 代理商： | TPS62101DR |
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TPS62100, TPS62101, TPS62102, TPS62103
MULTIMODE LOW POWER BUCK CONVERTER
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
loop compensation and the TPS6210X series of converters (continued)
Note that fz1 is a lower frequency than fz2. It is suggested that a spice or other simulator be used to verify
feedback loop characteristics. When doing this modeling, be sure to use an amplifier that has a band limited
response. Setting the amplifier up for an 80 dB gain with a single dominant pole at 200 Hz (2 MHz GBWP) will
lead to a good loop design. The gain/phase plots for the example circuits were all done using a 2 MHz GBWP
amplifier. Look at the example schematics and note where the poles and zeros are for an indication of where
to start compensating a new design.
current limiting
The TPS6210x family has built-in over-current protection and thermal shutdown. The over-current protection
is done in two stages. The first stage trips at approximately 1 A and simply causes an immediate pulse
termination. If a hard short is present at the output of the LC filter, propagation delays from the first-level over
current could allow the current to ratchet up in the inductor. To prevent this from happening, a second level of
over-current protection trips at approximately 1.2 A. When this level is tripped, the chip is forced to do a soft start.
If the chip is in an abnormally high ambient temperature, or has an inadequate heatsink for the power levels
demanded, the thermal shutdown circuitry causes the chip to shut down if the die temperature ever reaches
170
°C. After the die cools, normal operation resumes with a full soft start.
UDG–00050
V
OUT
V
FB
815mV
785mV
V
SW
I
L
200mA
Figure 4. Typical Pulsed-Variable-Frequency Mode (PFM) Circuit Waveform
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相关代理商/技术参数 |
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| TPS62101DRG4 | 功能描述:直流/直流开关调节器 Multimd 600kHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62102D | 功能描述:直流/直流开关调节器 Multimode 1MHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62102DG4 | 功能描述:直流/直流开关调节器 Multimode 1MHz Synch Buck Converter RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| TPS62102DR | 功能描述:开关变换器、稳压器与控制器 Multimode 1MHz Sync Sync Buck Converter RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| TPS62102DRG4 | 功能描述:开关变换器、稳压器与控制器 Multimode 1MHz Sync Sync Buck Converter RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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