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參數(shù)資料
| 型號(hào)： | MAX1712 |
| 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(yè)數(shù)： | 11/28頁(yè) |
| 文件大?。?/td> | 437K |
| 代理商： | MAX1712 |
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I
BIAS
= I
CC
+ f
(Q
G1
+ Q
G2
) = 15mA to 30mA (typ)
where I
CC
is 600μA (typ), 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 typ). The on-time
one-shot is triggered if the error comparator is low, the
M
High-Speed, Digitally Adjusted
Step-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 TO 28V
TRIG
Q
Q
S
R
2V
REF
GND
REF
FB
PGND
+5V
OUTPUT
DL
V
CC
V
CC
V
DD
LX
ZERO CROSSING
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
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| MAX17120ETJ+ | 功能描述:LCD 驅(qū)動(dòng)器 Triple Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX17120ETJ+T | 功能描述:LCD 驅(qū)動(dòng)器 Triple Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX17120EVKIT+ | 功能描述:電源管理IC開發(fā)工具 MAX17120 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| MAX17121ETG+ | 功能描述:LCD 驅(qū)動(dòng)器 Dual Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX17121ETG+T | 功能描述:LCD 驅(qū)動(dòng)器 Dual Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
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