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參數資料
| 型號： | MAX1533 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers |
| 中文描述： | 高效率、5路輸出、主電源控制器，用于筆記本電腦 |
| 文件頁數： | 23/38頁 |
| 文件大?。?/td> | 763K |
| 代理商： | MAX1533 |
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M
High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
______________________________________________________________________________________
23
Output Voltage
DC output accuracy specifications in the
Electrical
Characteristics
table refer to the error-comparator’s
threshold. When the inductor continuously conducts,
the MAX1533/MAX1537 regulate the peak of the output
ripple, so the actual DC output voltage is lower than the
slope-compensated trip level by 50% of the output rip-
ple voltage. For PWM operation (continuous conduc-
tion), the output voltage is accurately defined by the
following equation:
where V
NOM
is the nominal output voltage, A
SLOPE
equals 1%, and V
RIPPLE
is the output ripple voltage
(V
RIPPLE
= ESR x
I
INDUCTOR
as described in the
Output Capacitor Selection
section).
In discontinuous conduction (I
OUT
< I
LOAD(SKIP)
), the
MAX1533/MAX1537 regulate the valley of the output
ripple, so the output voltage has a DC regulation level
higher than the error-comparator threshold. For PFM
operation (discontinuous conduction), the output volt-
age is approximately defined by the following equation:
where V
NOM
is the nominal output voltage, f
OSC
is the
maximum switching frequency set by the internal oscil-
lator, f
SW
is the actual switching frequency, and I
IDLE
is
the idle-mode inductor current when pulse skipping.
Adjustable/Fixed Output Voltages
(Dual-Mode Feedback)
Connect FB3 and FB5 to GND to enable the fixed
SMPS output voltages (3.3V and 5V, respectively), set
by a preset, internal resistive voltage-divider connected
between CSL_ and analog ground. Connect a resistive
voltage-divider at FB_ between CSL_ and GND to
adjust the respective output voltage between 1V and
5.5V (Figure 5). Choose R2 (resistance from FB to
GND) to be about 10k
and solve for R1 (resistance
from OUT to FB) using the equation:
where V
FB_
= 1V nominal.
R
R
V
V
OUT
FB
1
2
1
_
_
=
V
V
f
f
I
ESR
OUT PFM
(
NOM
SW
OSC
IDLE
)
×
=
+
1
2
V
V
A
V
V
OUT PWM
(
NOM
SLOPE NOM
IN
RIPPLE
2
)
=
1
-
-
t
ON(SKIP)
≥
I
IDLE
L
V
IN
- V
OUT
I
I
LOAD(SKIP)
TIME
ON-TIME
0
CSL
TO ERROR
AMPLIFIER
REF
(2.0V)
R
12R
FB
FIXED OUTPUT
FB = GND
ADJUSTABLE
OUTPUT
Figure 4. Pulse-Skipping/Discontinuous Crossover Point
Figure 5. Dual-Mode Feedback Decoder
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1533ETJ | High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers |
| MAX1537ETX | High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers |
| MAX153MJP | 1Msps, レP-Compatible, 8-Bit ADC with 1レA Power-Down |
| MAX153EWP | 1Msps, レP-Compatible, 8-Bit ADC with 1レA Power-Down |
| MAX153CPP | 1Msps, レP-Compatible, 8-Bit ADC with 1レA Power-Down |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1533AETJ+ | 功能描述:電流和電力監(jiān)控器、調節(jié)器 PS Controllers for for Notebooks RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX1533AETJ+T | 功能描述:電流和電力監(jiān)控器、調節(jié)器 PS Controllers for for Notebooks RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX1533ETJ | 功能描述:電流和電力監(jiān)控器、調節(jié)器 RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX1533ETJ+ | 功能描述:電流和電力監(jiān)控器、調節(jié)器 PS Controllers for for Notebooks RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
| MAX1533ETJ+T | 功能描述:電流和電力監(jiān)控器、調節(jié)器 PS Controllers for for Notebooks RoHS:否 制造商:STMicroelectronics 產品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel |
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