參數資料
型號： MAX1994ETM
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Dual Step-Down Controllers Plus Linear- Regulator Controller for Notebook Computers
中文描述： DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, CQCC48
封裝： 7 X 7 MM, 0.80 MM HEIGHT, THIN, QFN-48
文件頁數： 27/49頁
文件大小： 983K
代理商： MAX1994ETM
M
Dual Step-Down Controllers Plus Linear-
Regulator Controller for Notebook Computers
______________________________________________________________________________________
27
For loads above the critical conduction point, where the
dead-time effect is no longer a factor, the actual switch-
ing frequency is:
where V
DROP1
is the sum of the parasitic voltage drops
in the inductor discharge path, including synchronous
rectifier, inductor, and PC board resistances; V
DROP2
is
the sum of the parasitic voltage drops in the inductor
charge path, including high-side switch, inductor, and
PC board resistances; and t
ON
is the on-time calculat-
ed by the MAX1816/MAX1994.
f
V
V
V
t
V
OUT
(
DROP
ON
IN
DROP
=
+
+
1
2
)
Figure 4. BUCK1 PWM Control Diagram
S
R
Q
TOFF
ONE-SHOT
Q
Q
TRIG
ZERO CROSSING
OVP/UVP
DETECTOR
RESET
OUT
TIMER
ON/OFF
CONTROL
TON ONE-SHOT
TRIG
Q
ON-TIME
COMPUTE
GAIN-
STATE
DECODER
R-2R
DAC
DAC
AMPLIFIER
10k
ERROR
AMPLIFIER
V+
OUT1
TON1
REF
CC
PGOOD1
SKP1/SDN
DAC BITS
TO DH1 DRIVER
INPUT
TO DL1 DRIVER
INPUT
ILIM1
FBS
I_OFFSET
CS1+
CS1-
GAIN
REF - 10%
REF + 10%
10k
10k
/A
VPS
10k
/A
VPS
10k
70k
8.6R1
0.4R1
R1
FBS
GDS
GND
I_GDS
S
R
Q
∑
∑
GM
GM
OVPEN
OVPEN
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相關代理商/技術參數
參數描述
MAX1994ETM+ 功能描述:DC/DC 開關控制器 Integrated Circuits (ICs) 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
MAX1994ETM+T 功能描述:DC/DC 開關控制器 Integrated Circuits (ICs) 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
MAX1994ETM-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
MAX1994EVKIT 功能描述:DC/DC 開關控制器 Evaluation Kit for the MAX1816 MAX1980 MAX1994 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
MAX1995EGI 功能描述:顯示驅動器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
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