參數(shù)資料
型號(hào)： MAX1715
廠商： Maxim Integrated Products, Inc.
英文描述： Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers
中文描述： 超高效率、雙路降壓型控制器，用于筆記本電腦
文件頁(yè)數(shù)： 12/28頁(yè)
文件大小： 308K
代理商： MAX1715
M
Ultra-High Efficiency, Dual Step-Down
Controller for Notebook Computers
12
______________________________________________________________________________________
current-limit threshold, and the minimum off-time one-
shot has timed out.
On-Time One-Shot (TON)
The heart of the PWM core is the one-shot that sets the
high-side switch on-time for both controllers. This fast,
low-jitter, adjustable one-shot includes circuitry that
varies the on-time in response to battery and output
voltage. The high-side switch on-time is inversely pro-
portional to the battery voltage as measured by the V+
input, and proportional to the output voltage. This algo-
rithm results in a nearly constant switching frequency
despite the lack of a fixed-frequency clock generator.
The benefits of a constant switching frequency are
twofold: first, the frequency can be selected to avoid
noise-sensitive regions such as the 455kHz IF band;
second, the inductor ripple-current operating point
remains relatively constant, resulting in easy design
methodology and predictable output voltage ripple.
The on-times for side 1 are set 15% higher than the
2V
REF
AGND
REF
OUT2
FB2
20
PGND
V
DD
OUTPUT2
2.5V
DL2
V
CC
V
DD
LX2
ZERO
CROSSING
CURRENT
LIMIT
PWM
CONTROLLER
(SEE FIGURE 3)
DH2
BST2
R
I
LIM_
V
DD
V
CC
V+
V+
V+
OUT1
FB1
SKIP
TON
ON1
ON2
P
GOOD
OUTPUT1
1.8V
5V INPUT
DL1
V
DD
LX1
ZERO
CROSSING
CURRENT
LIMIT
DH1
9R
R
I
LIM_
BATTERY
4.5V TO 28V
5
μ
A
BST1
V
DD
V
DD
V
CC
V
DD
V+
PWM
CONTROLLER
(SEE FIGURE 3)
MAX1715
5
μ
A
9R
Figure 2. Functional Diagram
相關(guān)PDF資料
PDF描述
MAX1715EEI Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers
MAX1717 Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP
MAX1717EEG Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP
MAX1718EEI Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II
MAX1718 Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1715EEI 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1715EEI+ 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1715EEI+T 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1715EEI-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1715EVKIT 功能描述:DC/DC 開關(guān)控制器 Evaluation Kit for the MAX1715 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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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