參數(shù)資料
型號： TPS54550PWP
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 9.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, PLASTIC, HTSSOP-16
文件頁數(shù)： 4/31頁
文件大?。?/td> 913K
代理商： TPS54550PWP
www.ti.com
Overcurrent Protection
Output Voltage Limitations
T
HICCUP(ms) +
2250
s(kHz)
(6)
Setting the Output Voltage
R2 +
R1
0.891
V
O * 0.891
(7)
SLVS623A – MARCH 2006 – REVISED APRIL 2006
OUTPUT VOLTAGE (V)
R2 VALUE (k
)
1.2
28.7
Overcurrent protection is implemented by sensing
1.5
14.7
the drain-to-source voltage across the high-side
1.8
9.76
MOSFET and compared to a voltage level which
represents the overcurrent threshold limit. If the
2.5
5.49
drain-to-source voltage exceeds the overcurrent
3.3
3.74
threshold limit for more than 100 ns, the high-side
MOSFET is disable, the SSENA pin is pulled low,
and the internal digital slow-start is reset to 0 V.
SSENA is held low for approximately the time that is
Due to the internal design of the TPS54550 there are
calculated by Equation 6:
both upper and lower output voltage limits for any
given input voltage. Additionally, the lower boundary
of the output voltage set point range also depends
on operating frequency. The upper limit of the output
voltage set point is constrained by the maximum duty
Once the hiccup time is complete, the SSENA pin is
cycle of the device and is shown in Figure 12. The
released and the converter initiates the internal
lower
limit
is
constrained
by
the
minimum
slow-start.
controllable on time, which may be as high as 220
ns. The approximate minimum output voltage for a
given
input
voltage
and
range
of
operating
The output voltage of the TPS54550 can be set by
frequencies is shown in Figure 8, while the maximum
feeding back a portion of the output to the VSENSE
operating frequency versus input voltage for some
pin using a resistor divider network. In the application
common output voltages is shown in Figure 10.
circuit of Figure 29, this divider network is comprised
The curves shown in these two figures are valid for
of resistors R1 and R2. To calculate the resistor
output currents greater than 0.5 A. As output
values to generate the required output voltage use
currents decrease towards no load (0 A), the
the following equation:
minimum output voltage decreases. For applications
where the load current is less than 100 mA, the
curves shown in Figure 9 and Figure 11 are
applicable. All of the data plotted in these curves are
Start with a fixed value of R1 and calculate the
approximate and take into account a possible 20%
required R2 value. Assuming a fixed value of 10 k
deviation in actual operating frequency relative to the
for R1, the following table gives the appropriate R2
intended set point.
value for several common output voltages:
12
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PDF描述
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相關代理商/技術參數(shù)
參數(shù)描述
TPS54550PWP 制造商:Texas Instruments 功能描述:PWM SWITCHER FET 6A O/P HTSSOP16 制造商:Texas Instruments 功能描述:PWM SWITCHER, FET 6A O/P, HTSSOP16 制造商:Texas Instruments 功能描述:PWM SWITCHER, FET 6A O/P, HTSSOP16; Primary Input Voltage:20V; No. of Outputs:1; Output Voltage:12V; Output Current:6A; Voltage Regulator Case Style:HTSSOP; No. of Pins:16; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes
TPS54550PWPG4 功能描述:直流/直流開關調(diào)節(jié)器 4.5 to 20V Input 6A Step Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54550PWPR 功能描述:開關變換器、穩(wěn)壓器與控制器 4.5 to 20V Input 6A Step Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
TPS54550PWPR/2801 功能描述:直流/直流開關調(diào)節(jié)器 4.5-20Vin,5A Sync SD Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54550PWPRG4 功能描述:開關變換器、穩(wěn)壓器與控制器 4.5 to 20V Input 6A Step Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
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