參數(shù)資料
型號(hào)： NCP1200D60R2G
廠商： ON SEMICONDUCTOR
元件分類： 穩(wěn)壓器
英文描述： PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies
中文描述： 0.25 A SWITCHING CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PDSO8
封裝： LEAD FREE, SOIC-8
文件頁(yè)數(shù)： 14/16頁(yè)
文件大小： 151K
代理商： NCP1200D60R2G
NCP1200
http://onsemi.com
14
If the leakage inductance is kept low, the MTD1N60E can
withstand
accidental
avalanche energy, e.g. during a
highvoltage spike superimposed over the mains, without
the help of a clamping network. If this leakage path
permanently forces a drainsource voltage above the
MOSFET BVdss (600 V), a clamping network is mandatory
and must be built around Rclamp and Clamp. Dclamp shall
react extremely fast and can be a MUR160 type. To calculate
the component values, the following formulas will help you:
R
clamp =
2
V
clamp
L
leak
(V
clamp
(V
out
Fsw
Vf sec)
N)
Ip
2
C
clamp
V
clamp
Fsw
V
ripple
R
clamp
with:
V
clamp
: the desired clamping level, must be selected to be
between 40 V to 80 V above the reflected output voltage
when the supply is heavily loaded.
V
out
+ Vf
: the regulated output voltage level + the secondary
diode voltage drop
L
leak
: the primary leakage inductance
N
: the Ns:Np conversion ratio
F
SW
: the switching frequency
V
ripple
: the clamping ripple, could be around 20 V
Another option lies in implementing a snubber network
which will damp the leakage oscillations but also provide
more capacitance at the MOSFET’s turnoff. The peak
voltage at which the leakage forces the drain is calculated
by:
L
leak
C
lump
where C
lump
represents the total parasitic capacitance seen
at the MOSFET opening. Typical values for Rsnubber and
Csnubber in this 4W application could respectively be 1.5
k and 47 pF. Further tweaking is nevertheless necessary to
tune the dissipated power versus standby power.
V
max
Ip
Available Documents
“Implementing the NCP1200 in Lowcost ACDC
Converters”, AND8023/D.
“Conducted EMI Filter Design for the NCP1200’’,
AND8032/D.
“Ramp Compensation for the NCP1200’’, AND8029/D.
TRANSient and AC models available to download at:
http://onsemi.com/pub/NCP1200
NCP1200 design spreadsheet available to download at:
http://onsemi.com/pub/NCP1200
ORDERING INFORMATION
Device
NCP1200P40
Type
Marking
1200P40
Package
PDIP8
Shipping
50 Units / Rail
NCP1200P40G
F
SW
= 40 kHz
1200P40
PDIP8
(PbFree)
50 Units / Rail
NCP1200D40R2
200D4
SOIC8
2500 Units /Reel
NCP1200D40R2G
200D4
SOIC8
(PbFree)
2500 Units /Reel
NCP1200P60
1200P60
PDIP8
50 Units / Rail
NCP1200P60G
F
SW
= 60 kHz
1200P60
PDIP8
(PbFree)
50 Units / Rail
NCP1200D60R2
200D6
SOIC8
2500 Units /Reel
NCP1200D60R2G
200D6
SOIC8
(PbFree)
2500 Units /Reel
NCP1200P100
1200P100
PDIP8
50 Units / Rail
NCP1200P100G
F
SW
= 100 kHz
1200P100
PDIP8
(PbFree)
50 Units / Rail
NCP1200D100R2
200D1
SOIC8
2500 Units / Reel
NCP1200D100R2G
200D1
SOIC8
(PbFree)
2500 Units / Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
相關(guān)PDF資料
PDF描述
NCP1200D40R2G PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies
NCP1201D100R2G PWM Current−Mode Controller for Universal Off−Line Supplies Featuring Low Standby Power with Fault Protection Modes
NCP1201P60G PWM Current−Mode Controller for Universal Off−Line Supplies Featuring Low Standby Power with Fault Protection Modes
NCP1201P60 PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power with Fault Protection Modes
NCP1201D100R2 PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Low Standby Power with Fault Protection Modes
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCP1200D60R2G-CUT TAPE 制造商:ON 功能描述:NCP1200 Series 16 V 70 kHz Surface Mount PWM Current-Mode Controller - SOIC-8
NCP1200P100 功能描述:電流型 PWM 控制器 100KHz Current Mode RoHS:否 制造商:Texas Instruments 開(kāi)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
NCP1200P100G 功能描述:電流型 PWM 控制器 100KHz Current Mode SMPS PWM RoHS:否 制造商:Texas Instruments 開(kāi)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
NCP1200P100G 制造商:ON Semiconductor 功能描述:Pulse Width Modulation (PWM) Controller
NCP1200P100R2G 制造商:ON Semiconductor 功能描述:
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