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参数资料
| 型号： | TPS40131RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC32 |
| 封装： | GREEN, PLASTIC, QFN-32 |
| 文件页数： | 16/40页 |
| 文件大小： | 940K |
| 代理商： | TPS40131RHBR |
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BOOT
Qg
C
85 nF
V
=
D
(40)
Feedback Compensator Design
OUT
VC(s)
s
OUT
(s
C
ESR
1)
R
1
G
DCR
Ac
s
1
s
C
R
1
+
=
t +
+
(41)
s
IN
OUT
RAMP
OUT
RAMP
T
V
DCR
Ac
T
L
n
V
DCR
Ac
T
L
t =
-
+
÷
÷
÷
÷
è
è
÷
è
÷
÷
-
÷
÷
÷
è
è
è
l
(42)
fVCP1
OUT
1
3.84 kHz
2
C
R
=
p
(43)
fVCP2
S
1
46.3 kHz
2
=
p t
(44)
SLVS635 – FEBRUARY 2007
BOOT1, BOOT2, SW1, SW2 (Pin 1) (Pin 24) (Pin 31) (Pin 26)
A bootstrap capacitor is connected between the BOOT1 and SW1 pin or between BOOT2 and SW2 pin. The
bootstrap capacitor depends on the total gate charge of the high-side MOSFET and the amount of droop
allowed on the bootstrap capacitor.
where
Qg is 17nC
ΔV is 0.2 V
For this application, a 0.1-
μF capacitor is selected. To reduce the turn on speed of the high-side MOSFET and
control the ringing, a 2-
resistor is placed in series with the BOOT pin.
EN/SYNC (Pin 14) Enable and Synchronization
This pin is either tied to BP5 to enable the chip or connected to an external clock.
VREF EA+ (Pin 9) (Pin 10) Voltage Reference and Error Amplifier
VREF and EA+ are directly connected together. A 0.1-
μF decoupling capacitor is recommended.
VDD, VIN5, BP5, BP8, AGND, PGND, PwPd (Pin 12) (Pin 30) (Pin 21) (Pin 13) (Pin 20) (Pin 28) (Pin 33)
VDD is directly connected to VIN and a 0.1-
μF decoupling capacitor is recommended.
VIN5 is connected to external +5 V and a 100-
μF bulk capacitor and a 1-μF decoupling capacitor are
recommended.
BP5 is filtered from VIN5. A 10-
resistor and a 0.1-μF capacitor are recommended for the low pass filter.
BP8 is decoupled with a 0.1-
μF capacitor to GND. A
GND and PwPd are tied to analog GND and PGND is tied to power GND.
Peak current mode control method is employed in the controller. A small signal model is developed from the
COMP signal to the output.
The time constant,
The low frequency pole is calculated in Equation 43.
Another pole from control to output is calculated in Equation 44.
23
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS40131RHBRG4 | 功能描述:DC/DC 开关控制器 Two-Phase Synch Buck Cntrlr 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 |
| TPS40131RHBT | 功能描述:DC/DC 开关控制器 2-Ph Synch Buck Cntr 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 |
| TPS40131RHBT | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu 制造商:Texas Instruments 功能描述:IC, SYNC BUCK CONTROLLER, QFN-32 |
| TPS40131RHBTG4 | 功能描述:DC/DC 开关控制器 Two-Phase Synch Buck Cntrlr 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 |
| TPS40132 | 制造商:TI 制造商全称:Texas Instruments 功能描述:TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS |
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