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MV1002SC データシート(PDF) 10 Page - Suntan Capacitors

部品番号 MV1002SC
部品情報  LED driver IC
Download  33 Pages
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メーカー  SUNTAN [Suntan Capacitors]
ホームページ  http://www.suntan.com.hk
Logo SUNTAN - Suntan Capacitors

MV1002SC データシート(HTML) 10 Page - Suntan Capacitors

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MV1002SC
9
Operation check
Basic design
See [3.2 Component selection] on pp.9-14
See [3.3 Winding voltage supply] on pp.15-16
Determine
specification
・Adjusting the Svout capacitor ...pp.13-14
・Adjusting the resonant capacitor ...p.13
Turned on at a valley
of resonant voltage
when dimming ratio is 100%?
Do any false
detections occur in the off-time
modulation regin?
・Adjusting the CS filter ...p.12
・Adjusting the gate resistor ...p.11
・Adjusting the resonant capacitor ...p.13
・Correcting the pattern ...p.17
Is the
output current within
the allowable range?
・Adjusting the current detection resistor
...p.10
Complete the
design process
No
No
No
yes
yes
Build a power
supply
yes
3.2 Component selection
The chart below shows a design procedure, from determination of the specification to adjustment. The design
procedure provided in this section is an example of electrical design.
During the design process, be sure to comply with safety standards established by official bodies and with your company
rules.
* Repeat the operations check if a component constant changes after design has been completed.
3.2.1
MOSFET (Q1)
The MOSFET receives the voltages shown in Figure 5. The maximum applied voltage nearly equals the maximum input
voltage. In actual use, voltage spikes may occur—for instance, due to parasitic inductance of the wiring pattern. Check
with the actual apparatus and select a component with sufficient withstand voltage.
For a lighting apparatus that consumes a large amount of power, MOSFETs with low on-resistance offer advantages.
When power consumption is small, MOSFETs with small capacitance, such as Ciss and Coss, help achieve highly
efficient and advantageous dimming characteristics.
IC power consumption is the product of the input voltage and current consumption. Current consumption is the sum of
the logic current and the gate drive current. Select MOSFETs that have the lowest possible gate capacitance. (See Table
1 Recommended MOSFETs.)
CAT.No.1A0202-2E


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