參數(shù)資料
型號(hào)： TPS53851RHHT
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, PQCC36
封裝： PLASTIC, VQFN-36
文件頁(yè)數(shù)： 55/66頁(yè)
文件大?。?/td> 1264K
代理商： TPS53851RHHT
www.ti.com
SLUS985 – DECEMBER 2009
6.4
ABBREVIATIONS
Table 6-4. Definition of Symbols
SYMBOL
DESCRIPTION
VIN(min)
Minimum Operating Input voltage
VIN(max)
Maximum Operating Input Voltage
VOUT
Output Voltage
IRIPPLE
Inductor Peak-Peak Ripple Current
ITRAN(MAX)
Maximum Load Transient
VUNDER
Output Voltage Undershot
VOVER
Output Voltage Overshot
VRIPPLE(TotOUT)
Total Output Ripple
VRIPPLE(COUT)
Output Voltage Ripple Due to Output Capacitance
VRIPPLE(CIN)
Input Voltage Ripple Due to Input Capacitance
VRIPPLE(CinESR)
Input Voltage Ripple Due to the ESR of Input Capacitance
Pswcond
High Side MOSFET Conduction Loss
Iswrms
RMS Current in the High Side MOSFET
Rdson(sw)
ON Drain-Source Resistance of the High Side MOSFET
Pswsw
High Side MOSFET Switching Loss
Ipk
Peak Current Through the High Side MOSFET
Rdrv
Driver Resistance of the High Side MOSFET
Qgdsw
Gate to Drain Charge of the High Side MOSFET
Qgssw
Gate to Source Charge of the High Side MOSFET
Vgsw
Gate Drive Voltage of the High Side MOSFET
Pswgate
Gate Drive Loss of the High Side MOSFET
Qgsw
Gate Charge of the High Side MOSFET
Pswtot
Total Losses of the High Side MOSFET
Psrcond
Low Side MOSFET Conduction Loss
Isrrms
RMS Current in the Low Side MOSFET
Rdson(sr)
ON Drain-Source Resistance of the low Side MOSFET
Psrgate
Gate Drive Loss of the Low Side MOSFET
Qgsr
Gate Charge of the Low Side MOSFET
Vgsr
Gate Drive Voltage of the Low Side MOSFET
Pdiode
Power Loss in the Diode
td
Dead Time Between the Conduction of High and Low Side MOSFET
V f
Forward Voltage Drop of the Body Diode of the Low Side MOSFET
Psrtot
Total Losses of the Low Side MOSFET
DCR
Inductor DC Resistance
Ac
The Gain of the Current Sensing Amplifier, typically it is 13
ROUT
Output Load Resistance
Vramp
Ramp Amplitude, typically it is 0.5V
T
Switching Period
Gvc(s)
Control to Output Transfer Function
Gc(s)
Compensator Transfer Function
Tv(s)
Loop Gain Transfer Function
Acm
Gain of the Compensator
f p
The Pole Frequency of the Compensator
f z
The Zero Frequency of the Compensator
Copyright 2009, Texas Instruments Incorporated
DESIGN EXAMPLES
59
Product Folder Link(s): TPS53851
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