參數(shù)資料
型號(hào)： MAX1714AEEP
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： High-Speed Step-Down Controller for Notebook Computers
中文描述： SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, PDSO20
封裝： 0.150 INCH, 0.025 INCH PITCH, MO-137AB, QSOP-20
文件頁(yè)數(shù)： 11/24頁(yè)
文件大小： 443K
代理商： MAX1714AEEP
M
High-Speed Step-Down Controller
for Notebook Computers
______________________________________________________________________________________
11
On-Time One-Shot (TON)
The heart of the PWM core is the one-shot that sets the
high-side switch on-time. This fast, low-jitter, adjustable
one-shot includes circuitry that varies the on-time in
response to battery and output voltage. The high-side
switch on-time is inversely proportional to the battery
voltage as measured by the V+ input, and proportional
to the output voltage. This algorithm results in a nearly
constant switching frequency despite the lack of a fixed-
frequency clock generator. The benefits of a constant
switching frequency are twofold: first, the frequency can
be selected to avoid noise-sensitive regions such as the
455kHz IF band; second, the inductor ripple-current
operating point remains relatively constant, resulting in
easy design methodology and predictable output volt-
age ripple.
On-Time = K (V
OUT
+ 0.075V) / V
IN
REF
-6%
FROM
OUT
REF
FB
ERROR
AMP
TOFF
1-SHOT
TON
REF
+12%
REF
-30%
FEEDBACK
MUX
(SEE FIGURE 9)
CHIP
SUPPLY
x2
SHDN
PGOOD
MAX1714A ONLY
NOTE: IN THE MAX1714B, AGND AND PGND ARE INTERNALLY CONNECTED TO THE GND PIN.
( ) ARE FOR THE MAX1714B ONLY.
(MAX1714B ONLY)
OVP/UVLO
LATCH
ON-TIME
COMPUTE
1-SHOT
TRIG
IN
2V TO 28V
TRIG
Q
Q
S
R
2V
REF
AGND
REF
OUT
(GND)
(GND)
PGND
+5V
OUTPUT
DL
V
CC
V
DD
LX
ZERO CROSSING
CURRENT
LIMIT
DH
BST
9R
R
I
LIM
+5V
+5V
Q
S1
Q
S2
TIMER
SKIP
TON
V+
Σ
MAX1714
S
R
Q
Figure 2. MAX1714 Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1714AEEP+ 功能描述:電流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1714AEEP+T 功能描述:電流型 PWM 控制器 Step-Down Controller for Notebook RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1714AEEP-T 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
MAX1714AEEP-TG068 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1714AEVKIT 功能描述:電流型 PWM 控制器 Evaluation Kit for the MAX1714A RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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