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參數(shù)資料
| 型號(hào)： | MAX1711 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed, Digitally Adjusted Step-Down Controllers for Notebook CPUs |
| 中文描述： | 高速、數(shù)字可調(diào)、降壓型控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 299K |
| 代理商： | MAX1711 |
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where I
CC
is 600μA typical, f is the switching frequency,
and Q
G1
and Q
G2
are the MOSFET data sheet total
gate-charge specification limits at V
GS
= 5V.
Free-Running, Constant-On-Time PWM
Controller with Input Feed-Forward
The QUICK-PWM control architecture is an almost fixed-
frequency, constant-on-time current-mode type with volt-
age feed-forward (Figure 2). This architecture relies on
the filter capacitor’s ESR to act as the current-sense
resistor, so the output ripple voltage provides the PWM
ramp signal. The control algorithm is simple: the high-
side switch on-time is determined solely by a one-shot
whose period is inversely proportional to input voltage
and directly proportional to output voltage. Another one-
shot sets a minimum off-time (400ns typical). The on-time
one-shot is triggered if the error comparator is low, the
M
High-S peed, Digitally Adjusted
S tep-Down Controllers for Notebook CPUs
______________________________________________________________________________________
11
REF
-5%
FROM
D/A
REF
REF
D0
D1
D2
D3
10k
ERROR
AMP
TOFF
1-SHOT
TON
REF
+12%
FB
REF
-30%
R-2R
D/A CONVERTER
CHIP SUPPLY
g
m
g
m
g
m
GNDS
FBS
CC
SHDN
PGOOD
OVP/UVLO
LATCH
ON-TIME
COMPUTE
1-SHOT
TRIG
V
BATT
2V TO28V
TRIG
Q
Q
S
R
2V
REF
GND
REF
FB
PGND
+5V
OUTPUT
DL
V
CC
V
CC
V
DD
LX
ZEROCROSSING
CURRENT
LIMIT
DH
BST
I
LIM
R
LIM
+5V
5
μ
A
+5V
Q
S1
Q
S2
TIMER
SKIP
OVP
TON
V+
70k
Σ
MAX1710
S
R
Q
Figure 2. MAX1710 Functional Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1714 | High-Speed Step-Down Controller for Notebook Computers |
| MAX1714AEEP | High-Speed Step-Down Controller for Notebook Computers |
| MAX1714BEEE | High-Speed Step-Down Controller for Notebook Computers |
| MAX1715 | Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers |
| MAX1715EEI | Ultra-High Efficiency, Dual Step-Down Controller for Notebook Computers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX17110ETJ+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX17111ETL+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX17111GTL+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX17112ETB+ | 制造商:Maxim Integrated Products 功能描述:HIGH-PERFORMANCE, STEP-UP, DC-DC CONVERTER - Rail/Tube |
| MAX17112ETB+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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