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Dual-Phase, Quick-PWM Controller
for IMVP6+ CPU Core Power Supplies
determine the sense capacitance (C EQ ). Choose
capacitors with 5% tolerance and resistors with 1% tol-
erance specifications. Temperature compensation is
recommended for this current-sense method. See the
Voltage Positioning and Loop Compensation section for
detailed information.
that results in unwanted offsets in the regulation voltage
and results in early current-limit detection. Similar to the
inductor DCR sensing method, the RC filter’s time con-
stant should match the L/R time constant formed by the
current-sense resistor’s parasitic inductance:
When using a current-sense resistor for accurate output-
voltage positioning, the circuit requires a differential RC
filter to eliminate the AC voltage step caused by the
L ESL
R SENSE
= C EQ R 1
equivalent series inductance (L ESL ) of the current-sense
resistor (see Figure 3). The ESL-induced voltage step
does not affect the average current-sense voltage, but
results in a significant peak current-sense voltage error
INPUT (V IN )
where L ESL is the equivalent series inductance of the cur-
rent-sense resistor, R SENSE is current-sense resistance
value, C EQ and R1 are the time-constant matching
components.
DH_
N H
C IN
SENSE RESISTOR
C EQ R1 = ESL
LX_
L
L ESL
R SENSE
L
R SENSE
MAX17410 DL_
N L
D L
R1
C EQ
C OUT
PGND
CSP_
CSN_
A) OUTPUT SERIES RESISTOR SENSING
INPUT (V IN )
DH_
N H
C IN
INDUCTOR
LX_
L
R DCR
R CS =
R2
R1 + R2
R DCR
[ R1 R2 1 ]
MAX17410 DL_
PGND
N L
D L
R1
R2
C EQ
C OUT
L
R CS = C EQ
×
1 +
CSP_
CSN_
B) LOSSLESS INDUCTOR SENSING
Figure 3. Current-Sense Methods
FOR THERMAL COMPENSATION:
R2 SHOULD CONSIST OF AN NTC RESISTOR IN
SERIES WITH A STANDARD THIN-FILM RESISTOR.
______________________________________________________________________________________
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MAX17410GTM+T
功能描述:电流型 PWM 控制器 NDA IC RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411GTM+
功能描述:电流型 PWM 控制器 IMVP7 CPU & Graphics Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411GTM+T
功能描述:电流型 PWM 控制器 IMVP7 CPU & Graphics Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411RGTM+
功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411RGTM+T
功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411RGTM+TW
功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17411RGTM+W
功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14
MAX17412ETI+
制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: