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參數(shù)資料
| 型號： | MAX747ESD |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125 |
| 中文描述： | SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | 0.150 INCH, PLASTIC, SO-14 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 136K |
| 代理商： | MAX747ESD |
M
High-Effic ienc y PWM, S tep-Down
P-Channel DC-DC Controller
_______________________________________________________________________________________
7
LBI
REF
OUT
CC
FB
AV+
CS
SS
LBO
EXT
V+
LOW-BATTERY
COMPARATOR
ERROR
AMPLIFIER
EXT
CONTROL
CURRENT-SENSE
AMPLIFIER
100mV
SHDN
N
100kHz
OSCILLATOR
+2V
REFERENCE
SOFT-START
CIRCUITRY
Σ
SLOPE
COMPENSATION
RAMP
AGND
50mV
GND
CURRENT-LIMIT
COMPARATOR
PWM
COMPARATOR
IDLE-MODE
COMPARATOR
60k
40k
DUAL-MODE
COMPARATOR
V
RAMP
Figure 2. Block Diagram
T he Osc illator and EX T Control
The switching frequency is nominally 100kHz and the
duty cycle varies from 5% to 96%, depending on the
input/output voltage ratio. EXT, which provides the gate
drive for the external P-FET, is switched between V+
and GND at the switching frequency. EXT is controlled
by a unique two-comparator control scheme composed
of a PWM comparator and an idle-mode comparator
(Figure 2). The PWM comparator determines the cycle-
by-cycle peak current with heavy loads, and the
light-load comparator sets the light-load peak current.
As V
OUT
begins to drop, EXT goes low and remains low
until both comparators trip. With heavy loads, the idle-
mode comparator trips quickly, and the PWM control
comparator determines the EXT on-time; with light
loads, the idle-mode comparator sets the EXT on-time.
相關(guān)PDF資料 |
PDF描述 |
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| MAX747MJD | Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125 |
| MAX7480 | Parallel-Load 8-Bit Shift Registers 20-LCCC -55 to 125 |
| MAX7480EPA | Parallel-Load 8-Bit Shift Registers 16-CDIP -55 to 125 |
| MAX7480ESA | Parallel-Load 8-Bit Shift Registers 16-CFP -55 to 125 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX747ESD+ | 功能描述:DC/DC 開關(guān)控制器 Integrated Circuits (ICs) 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 |
| MAX747ESD+T | 功能描述:DC/DC 開關(guān)控制器 Integrated Circuits (ICs) 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 |
| MAX747ESD-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 |
| MAX747EVKIT-SO | 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 |
| MAX747MJD | 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 |
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