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參數資料
| 型號： | MAX1624 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
| 中文描述： | 高速、同步整流、降壓型控制器，用于CPU電源 |
| 文件頁數： | 14/24頁 |
| 文件大小： | 223K |
| 代理商： | MAX1624 |
M
High-S peed S tep-Down Controllers with
S ync hronous Rec tific ation for CPU Power
14
______________________________________________________________________________________
voltage is the average of the AC voltage at the switching
node, which is adjusted and regulated by changing the
duty cycle of the MOSFET switches. Slope compensa-
tion is necessary to stabilize current-mode feedback
controllers with a duty cycle greater than 50%. Maximum
duty cycle is greater than 85% (see Typical Operating
Characteristics).
PWM Controller Bloc k and Integrator
The heart of the current-mode PWM controller is a
multi-input open-loop comparator that sums three sig-
nals: the buffered feedback signal, the current-sense
signal, and the slope-compensation ramp. This direct-
summing configuration approaches ideal cycle-by-
cycle control over the output voltage. The output
voltage error signal is generated by an error amplifier
that compares the amplified feedback voltage to an
internal reference.
Each pulse from the oscillator sets the main PWM latch
that turns on the high-side switch for a period deter-
mined by the duty factor (approximately V
OUT
/ V
IN
).
The current-mode feedback system regulates the peak
inductor current as a function of the output voltage
REF
REF2
N
FB
REF
CC2
CC1
PWROK
REF1
10k
40k
WINDOW
CONTROL AND
DRIVE LOGIC
OSCILLATOR
SLOPE
COMPENSATION
REF
AGND
V
CC
FREQ
REF
REF1
REF2
CSL
CSH
BST
DH
LX
V
DD
RESET
Q
Q
SET
DL
PGND
MAX1625
Figure 4. MAX1625 Simplified Block Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1625ESE | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
| MAX1624-MAX1625 | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
| MAX1624EAG | High-Speed Step-Down Controllers with Synchronous Rectification for CPU Power |
| MAX1626ESA | 5V/3.3V or Adjustable, 100% Duty-Cycle, High-Efficiency, Step-Down DC-DC Controllers |
| MAX1627ESA | 5V/3.3V or Adjustable, 100% Duty-Cycle, High-Efficiency, Step-Down DC-DC Controllers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1624EAG | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1624EAG+ | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1624EAG+T | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1624EAG-T | 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| MAX1624EVKIT | 功能描述:DC/DC 開關控制器 Evaluation Kit for the MAX1624 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
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