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參數(shù)資料
| 型號： | MAX786 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual-Output Power-Supply Controller for Notebook Computers(具有25μA關(guān)斷的,3.3V/5V筆記本型電腦電源) |
| 中文描述： | 雙輸出電源控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 301K |
| 代理商： | MAX786 |
M
Dual-Output Power-S upply
Controller for Notebook Computers
______________________________________________________________________________________
11
second half-cycle, the PWM turns on the high-side
MOSFET by connecting the capacitor to the MOSFET
gate by closing an internal switch between BST_ and
DH_. This provides the necessary enhancement voltage
to turn on the high-side switch, an action that “boosts”
the 5V gate-drive signal above the battery voltage.
Ringing seen at the high-side MOSFET gates (DH3 and
DH5) in discontinuous-conduction mode (light loads) is
a natural operating condition caused by the residual
energy in the tank circuit formed by the inductor and
stray capacitance at the LX_ nodes. The gate driver
negative rail is referred to LX_, so any ringing there is
directly coupled to the gate-drive supply.
1X
CS_
FB_
BST_
DH_
LX_
LEVEL
SHIFT
VL
SHOOT-
THROUGH
CONTROL
DL_
PGND
LEVEL
SHIFT
Q
R
S
SYNCHRONOUS
RECTIFIER CONTROL
N
3.3V
1R
30R
VL
4
μ
A
0mV TO100mV
CURRENT
LIMIT
MINIMUM
CURRENT
(IDLE-MODE)
25mV
SLOPE COMP
Σ
REF, 3.3V
(OR INTERNAL
5V REFERENCE)
MAIN PWM
COMPARATOR
60kHz
LPF
R
S
Q
OSC
SS_
ON_
Figure 3. PWM Controller Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX787 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
| MAX788 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
| MAX789 | 5V/3.3V/3V 5A Step-Down, PWM, Switch-Mode DC-DC Regulators(5A,5V步降,PWM,開關(guān)型DC-DC變換器) |
| MAX791 | Microprocessor Supervisory Circuit(微處理器監(jiān)控電路) |
| MAX792R | Microprocessor and Non-Volatile Memory Supervisory Circuits(復(fù)位門限2.61V,微處理器和非易失存儲器監(jiān)控電路) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX78615+LMU/A01 | 制造商:Maxim Integrated Products 功能描述:IC ENERGY MEAS PROC LMU TQFN |
| MAX78615+LMU/A01T | 制造商:Maxim Integrated Products 功能描述:IC ENERGY MEAS PROC LMU TQFN |
| MAX78615+PSU/A00 | 制造商:Maxim Integrated Products 功能描述:IC ENERGY MEAS PROC LMU TQFN |
| MAX78615+PSU/A00T | 制造商:Maxim Integrated Products 功能描述:ISOLATED ENERGY MEAS PROCESSOR - PSU - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC ENERGY MEAS PROC LMU TQFN 制造商:Maxim Integrated Products 功能描述:Iso Measurement Processor for PSU |
| MAX78630+PPM/D00 | 制造商:Maxim Integrated Products 功能描述:ENERGY MEAS PROCESSOR - 3-PHASE - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC ENERGY MEAS PROC LMU TQFN |
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