參數(shù)資料
型號： TPS5430MDDAREPG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 8.5 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8
封裝： GREEN, PLASTIC, SOP-8
文件頁數(shù)： 11/28頁
文件大小： 846K
代理商： TPS5430MDDAREPG4
V
OUTMIN + 0.12
V
INMAX * IOMIN
0.110 ) VD * IOMIN
R
L * VD
(22)
Internal Compensation Network
H(s) +
1 )
s
2p
Fz1
1 )
s
2p
Fz2
s
2p
Fp0
1 )
s
2p
Fp1
1 )
s
2p
Fp2
1 )
s
2p
Fp3
(23)
Thermal Calculations
www.ti.com................................................................................................................................................................................................... SLVS911 – MARCH 2009
The lower limit is constrained by the minimum controllable on time, which may be as high as 200 ns. The
approximate minimum output voltage for a given input voltage and minimum load current is given by:
Where:
VINMAX is the maximum input voltage.
IOMIN is the minimum load current.
VD is the catch diode forward voltage.
RL is the output inductor series resistance.
This equation assumes nominal on resistance for the high-side FET and accounts for worst-case variation of
operating frequency set point. Any design operating near the operational limits of the device should be
carefully checked to ensure proper functionality.
The design equations given in the example circuit can be used to generate circuits using the TPS5430. These
designs are based on certain assumptions and will tend to always select output capacitors within a limited range
of ESR values. If a different capacitor type is desired, it may be possible to fit one to the internal compensation of
the TPS5430. Equation 23 gives the nominal frequency response of the internal voltage-mode type-3
compensation network:
Where:
Fp0 = 2165 Hz, Fz1 = 2170 Hz, Fz2 = 2590 Hz
Fp1 = 24 kHz, Fp2 = 54 kHz, Fp3 = 440 kHz
Fp3 represents the non-ideal parasitics effect.
Using this information along with the desired output voltage, feed-forward gain, and output filter characteristics,
the closed-loop transfer function can be derived.
The following formulas show how to estimate the device power dissipation under continuous conduction mode
operations. They should not be used if the device is working at light loads in the discontinuous conduction mode.
Conduction loss: Pcon = IOUT
2 × Rds(on) × V
OUT/VIN
Switching loss: Psw = VIN × IOUT × 0.01
Quiescent current loss: Pq = VIN × 0.01
Total loss: Ptot = Pcon + Psw + Pq
Given TA ≥ Estimated junction temperature: TJ = TA + Rth × Ptot
Given TJMAX = 125°C ≥ Estimated maximum ambient temperature: TAMAX = TJMAX – Rth × Ptot
Copyright 2009, Texas Instruments Incorporated
19
Product Folder Link(s): TPS5430-EP
相關PDF資料
PDF描述
TPS54310MPWPREP 6 A SWITCHING REGULATOR, 775 kHz SWITCHING FREQ-MAX, PDSO20
TPS54310PWPRG4 6 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO20
TPS54320RHLR SWITCHING REGULATOR, 1320 kHz SWITCHING FREQ-MAX, PQCC14
TPS54320RHL SWITCHING REGULATOR, PQCC14
TPS54327DDAR 5.7 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO8
相關代理商/技術參數(shù)
參數(shù)描述
TPS5430-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-A WIDE-INPUT-RANGE STEP-DOWN SWIFT CONVERTER
TPS5430QDDARQ1 功能描述:直流/直流開關調節(jié)器 3A Wide-Input-Range Step-Down 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
TPS5431 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.6 MHz, 3-V TO 6-V INPUT, 3-A SYNCHRONOUS STEP-DOWN SWIFT⑩ CONVERTER WITH DISABLED SINKING DURING START-UP
TPS54310 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs
TPS54310-EP 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-V TO 6-V INPUT, 3-A OUTPUT,SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs(SWIFT?)
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*