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參數(shù)資料
| 型號： | TPS51113DRCR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 330 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數(shù)： | 10/26頁 |
| 文件大?。?/td> | 2137K |
| 代理商： | TPS51113DRCR |
(
)
(
)
f
IN
OUT
IN min
IN
SW
RIPPLE C
I
V
C
44 F
V
=
m
(
)
(
)
IN
RIPPLE ESR _ C
C
OUT
RIPPLE
V
ESR
4.3m
I
2
=
W
+
÷
÷
è
(
)
( )
f
2
D1
S1
D2
S2
HFET _ Loss
COND1
SW1
RMS1
IN
SW
DS on 1
I
t
I
t
P
I
R
V
649mW
6
2
=
+
=
+
+
=
÷
è
( )
f
2
SR _ Loss
COND2
COND3
RR
RMS2
O
F
D
SW
RR
IN
SW
DS on 2
1
P
I
R
I
V
t
Q
V
382mW
2
=
+
=
+
+
=
é
ù
0
OUT
1
f
6.0 kHz
2
L
C
=
p
Z
OUT
1
f
18.8 kHz
2
ESR
C
=
p
SLUS864 – MAY 2009 ....................................................................................................................................................................................................... www.ti.com
Input Capacitor Selection
Considering 100 mV VRIPPLE(Cin) and 50 mV VRIPPLE(ESR_Cin), the input capacitance value and ESR value can be
calculated according to Equation 7 and Equation 8, respectively.
(31)
(32)
Therefore, two 22-
μF ceramic capacitors with 2-m ESR can meet this requirement.
Choosing MOSFETS
High-Side MOSFET Power Loss
BSC079N03S is used for the high-side MOSFET. The on-resistance, RDS(on)1 is 7.9 m. MOSFET switching-on
time (ts1) and switching-off time (ts2) are approximately 9 ns and 24 ns, respectively. By using Equation 9 through
Equation 13, the total power loss of the high-side MOSFET is estimated.
(33)
Synchronous Rectifier MOSFET Power Loss
BSC032N03S is used for the synchronous rectifier MOSFET. The on-resistance, RDS(on)1 is 3.2 m. The body
diode has a 0.84-V diode forward voltage and 15-nC reverse recovery charge. The output driver deadtime is 30
ns. By using Equation 14 through Equation 18, the total power loss of the synchronous MOSFET is estimated,
(34)
Feedback Loop Compensation
Since TPS51113 and TPS51163 utilize voltage-mode control for buck converters, Type III network is
recommended for loop compensation. The converter utilizes a 1.5-
μH inductor and 470-μF capacitor with 18-m
ESR. The double pole, determined by the L, and COUT of the buck converter, is derived by Equation 19
(35)
Also, the ESR zero of the buck converter can be achieved by using Equation 20.
(36)
18
Copyright 2009, Texas Instruments Incorporated
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相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS51113DRCT | 功能描述:DC/DC 開關控制器 4.5-13.2V Synch Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS51113DRCT | 制造商:Texas Instruments 功能描述:; Controller Type:Synchronous Buck; Inpu |
| TPS51113EVM | 功能描述:電源管理IC開發(fā)工具 25A Synch Buck Cnvrtr Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TPS51116 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:COMPLETE DDR AND DDR2 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE |
| TPS51116_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:COMPLETE DDR, DDR2 AND DDR3 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE |
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