参数资料
型号: TPS54160ADRCR
厂商: Texas Instruments
文件页数: 38/55页
文件大小: 0K
描述: IC REG BUCK ADJ 1.5A 10SON
标准包装: 3,000
系列: SWIFT™, Eco-Mode™
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.8 V ~ 58 V
输入电压: 3.5 V ~ 60 V
PWM 型: 电流模式
频率 - 开关: 100kHz ~ 2.5MHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 150°C
安装类型: 表面贴装
封装/外壳: 10-VFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 10-SON 裸露焊盘(3x3)
SLVSB56C – MAY 2012 – REVISED FEBRUARY 2014
2 p ′ R C ′ f P ( )
C C =
C f =
1
mod
C OUT ′ R ESR
R C
(49)
(50)
For cases where the modulator zero is less than the crossover frequency (Aluminum or Tantalum capacitors), the
equations are:
G MOD ( f c ) ′ f Z ( mod ) ( EA ) ′ V REF
R C =
C C =
C f =
V OUT
′ gm
1
2 p ′ R C ′ f P ( mod )
1
2 p ′ R C ′ f Z ( mod )
(51)
(52)
(53)
For the example problem, the ESR zero is located at a higher frequency compared to the crossover frequency so
Equation 50 through Equation 53 are used to calculate the compensation components. In this example, the
calculated components values are:
?
?
?
R C = 76.2 k ?
C C = 2710 pF
C? = 6.17 pF
The calculated value of the Cf capacitor is not a standard value so a value of 2700 pF is used. 6.8 pF is used for
C C . The R C resistor sets the gain of the error amplifier which determines the crossover frequency. The calculated
R C resistor is not a standard value, so 76.8 k ? is used.
9.2.2.11 Power Dissipation Estimate
The following formulas show how to estimate the device power dissipation under continuous conduction mode
(CCM) operation. These equations should not be used if the device is working in discontinuous conduction mode
(DCM).
The power dissipation of the device includes conduction loss (Pcon), switching loss (Psw), gate drive loss (Pgd)
and supply current (Pq).
P COND = ( I OUT ) ′ R DS ( ) ′ ? ÷
è V IN ?
P SW IN SW OUT ′ 0.25 ′ 10 - 9
= ( V ) ′ f
2
′ I
on
2 ? V OUT ?
(54)
(55)
P GD = V IN ′ 3 ′ 10
- 9
′ f SW
(56)
P Q = 116 ′ 10
where
- 6
′ V IN
?
?
?
?
I OUT is the output current (A)
R DS(on) is the on-resistance of the high-side MOSFET ( ? )
V OUT is the output voltage (V)
V IN is the input voltage (V)
?
? SW is the switching frequency (Hz)
(57)
P TOT = P COND ′ P SW ′ P GD ′ P Q
For given T A ,
T J = T A + R TH ′ P TOT
For given T JMAX = 150°C
(58)
(59)
38
Copyright ? 2012–2014, Texas Instruments Incorporated
Product Folder Links: TPS54160 TPS54160A
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