參數(shù)資料
型號(hào)： MAX1636
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Voltage, Precision Step-Down Controller for Portable CPU Power
中文描述： 低電壓、高精度降壓型控制器，用于便攜式CPU電源
文件頁(yè)數(shù)： 12/24頁(yè)
文件大小： 219K
代理商： MAX1636
PWM Controller
The heart of the current-mode PWM controller is a
multi-input, open-loop comparator that sums four sig-
nals: the output voltage error signal with respect to the
reference voltage, the current-sense signal, the inte-
grated voltage-feedback signal, and the slope-
compensation ramp (Figure 3).
The PWM controller is a direct-summing type, lacking a
traditional error amplifier and the phase shift associat-
ed with it. This direct-summing configuration approach-
es ideal cycle-by-cycle control over the output voltage
(Figure 4).
When
SKIP
= low, Idle Mode circuitry automatically
optimizes efficiency throughout the load-current range.
Idle Mode dramatically improves light-load efficiency
M
Low-Voltage, Prec ision S tep-Down
Controller for Portable CPU Power
12
______________________________________________________________________________________
Low
Light
Idle
LOAD
CURRENT
Pulse-skipping,
discontinuous inductor
current
MODE
DESCRIPTION
PWM
High
Light
PWM
Constant-frequency PWM,
continuous inductor current
PWM
High
Heavy
Constant-frequency PWM,
continuous inductor current
Low
Heavy
Constant-frequency PWM,
continuous inductor current
SKIP
Table 3.
SKIP
PWM Table
SHOOT-
THROUGH
CONTROL
R
Q
30mV
R
Q
LEVEL
SHIFT
1X
gm
2X
OSC
LEVEL
SHIFT
CURRENT
LIMIT
SYNCHRONOUS
RECTIFIER CONTROL
SHDN
CK
-100mV
CSH
CSL
FB
CC
REF
BST
DH
LX
VL
DL
PGND
S
S
SLOPE
COMPENSATION
SKIP
COUNTER
DAC
SOFT-START
Figure 3. PWM Controller Functional Diagram
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1636CPUEVKIT 制造商:Maxim Integrated Products 功能描述:LOW VOLTAGE, PRECISION STEP DOWN CONTROLLER F - Bulk
MAX1636EAP 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1636EAP+ 功能描述:DC/DC 開(kāi)關(guān)控制器 Precision Step-Down for Portable CPU Pwr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1636EAP+T 功能描述:DC/DC 開(kāi)關(guān)控制器 Precision Step-Down for Portable CPU Pwr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1636EAP-T 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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