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| 型号： | TPS40192DRCRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件页数： | 17/38页 |
| 文件大小： | 707K |
| 代理商： | TPS40192DRCRG4 |
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f
ESR +
1
2p
C
OUT
R
ESR
Frequency (Log Scale)
fRES
fESR
0 dB
40 dB/decade
20 dB/decade
AMOD
+
2
+
3
11
Power Pad
To
PWM
R8
R10
C2
R6
C3
C1
R7
VOUT
VFB
UDG06068
SLUS719C – MARCH 2007 – REVISED AUGUST 2010
www.ti.com
For this design with a 1.0-mH inductor and 2 100-mF capacitors, the resonance frequency is approximately
11.3 kHz. At any lower frequency, the power stage has a DC gain of 23 dB and at any higher frequency the
power stage gain drops off at -40 dB per decade. The ESR zero is approximated in Equation 29.
(29)
For COUT = 2, 100-mF and RESR = 2.5 m each, f ESR = 636 kHz, greater than 1/5th the switching frequency and
outside the scope of the error amplifier design. The gain of the power stage would change to -20 dB per decade
Figure 18. Approximation of Power Stage Gain
The following compensation design procedure assumes f ESR > f RES. For designs using large high-ESR bulk
capacitors on the output where f ESR < f RES. Type-II compensation can be used but is not addressed in this
document.
Figure 19. Type-III Compensator Used with TPS40040/41
Feedback Divider (R7, R8)
Select R8 to be between 10 k
and 100 k. For this design, select 20 k. R7 is then selected to produce the
24
Copyright 2007–2010, Texas Instruments Incorporated
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| TPS40192DRCT | 功能描述:DC/DC 开关控制器 4.5V-8V Input Synch Buck Contr RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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| TPS40192EVM-001 | 功能描述:电源管理IC开发工具 TPS40192 Evaluation Module 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 |
| TPS40192EVM-525 | 功能描述:电源管理IC开发工具 TPS40192EVM-525 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 |
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