參數(shù)資料
型號(hào)： MC33163PG
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述： 3.4 A SWITCHING REGULATOR, 55 kHz SWITCHING FREQ-MAX, PDIP16
封裝： LEAD FREE, PLASTIC, DIP-16
文件頁(yè)數(shù)： 14/16頁(yè)
文件大?。?/td> 255K
代理商： MC33163PG
MC34163, MC33163
http://onsemi.com
14
Calculation
StepDown
StepUp
VoltageInverting
ton
(Notetoff
Vout
VF
Vin
Vsat
Vout
Vout
VF– Vin
Vin– Vsat
|Vout|
Vin
VF
Vsat
ton
ton
toff
ton
toff
1
ton
toff
ton
toff
1
ton
toff
ton
toff
1
CT
32.143 · 10–6
32.143 · 10–6
32.143 · 10–6
IL(avg)
Iout
Iout
ton
toff
1
Iout
ton
toff
1
Ipk (Switch)
IL(avg)
IL
2
IL(avg)
IL
2
IL(avg)
IL
2
RSC
0.25
Ipk (Switch)
0.25
Ipk (Switch)
0.25
Ipk (Switch)
L
Vin
Vsat
Vout
IL
ton
Vin
Vsat
IL
ton
Vin
Vsat
IL
ton
V
ripple(pp)
IL
1
8 CO
2
(ESR)2
tonIout
CO
tonIout
CO
Vout
Vref
R2
R1
1
Vref
R2
R1
1
Vref
R2
R1
1
V
in
V
out
I
out
I
L
V
ripple(pp)
Nominal operating input voltage.
Desired output voltage.
Desired output current.
Desired peaktopeak inductor ripple current. For maximum output current it is suggested that I
L
be chosen to be less
than 10% of the average inductor current I
L(avg)
. This will help prevent I
pk (Switch)
from reaching the current limit
threshold set by R
SC
. If the design goal is to use a minimum inductance value, let I
L
= 2(I
L(avg)
). This will
proportionally reduce converter output current capability.
Maximum output switch frequency.
Desired peaktopeak output ripple voltage. For best performance the ripple voltage should be kept to a low value
since it will directly affect line and load regulation. Capacitor C
O
should be a low equivalent series resistance (ESR)
electrolytic designed for switching regulator applications.
The following Converter Characteristics must be chosen:
NOTES:
1. V
sat
Saturation voltage of the output switch, refer to Figures 8 and 9.
NOTES:
2. V
F
Output rectifier forward voltage drop. Typical value for 1N5822 Schottky barrier rectifier is 0.5 V.
NOTES:
3. The calculated t
on
/t
off
must not exceed the minimum guaranteed oscillator charge to discharge ratio of 8, at the minimum
NOTES:
3.
operating input voltage.
Figure 28. Design Equations
相關(guān)PDF資料
PDF描述
MC33163DWG 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
MC34072-D08-T HIGH SLEW RATE, WIDE BANDWIDTH , SINGLE SUPPLY OPERATIONAL AMPLIFIER
MC34072L-D08-T HIGH SLEW RATE, WIDE BANDWIDTH , SINGLE SUPPLY OPERATIONAL AMPLIFIER
MC34072L-S08-R HIGH SLEW RATE, WIDE BANDWIDTH , SINGLE SUPPLY OPERATIONAL AMPLIFIER
MC34072L-S08-T HIGH SLEW RATE, WIDE BANDWIDTH , SINGLE SUPPLY OPERATIONAL AMPLIFIER
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