SSC1S311A Ver la hoja de datos (PDF) - Sanken Electric co.,ltd.
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SSC1S311A Datasheet PDF : 28 Pages
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SSC1S311A
5. Typical Applications
The startup voltage of Figure 5-1 is about 21V which is Startup Circuit Operation Voltage, VSTART(ON). When the
startup voltage increases more than this, Figure 5-2 is available, adding DZST in series with the ST pin.
The startup voltage after adding DZST, VSTART(ON)’ is calculated as follows:
VSTART(ON) ' = VSTART(ON) + VZST ,
(1)
where:
VSTART(ON) is the Startup Circuit Operation Voltage, about 21V, and
VZST is the zener voltage of DZST.
D1
VAC
C1
CV
Q1
D3 R5
R4
R3
R12
C9
87
6
5
GND VCC OCP DRV
U1
SSC1S311A
ROCP
FB/OLP BD
ST
1
2
4
R1
C3 PC1
C4
C5
T1
D4
P
RST
D2
C2
R2
D
DZBD
RBD1
C6
S
CBD
RBD2
L1
R9
PC1 R6
R10
R7
C7 R8
U2
R11
VOUT
C8
GND
Figure 5-1. Application Circuit Example 1
VAC
D1
C1
C5
T1
D4
P
CV
Q1
D3 R5
C6
S
R4
R3
R12
C9
RST
D2
R2
87
6
5
D
GND VCC OCP DRV
C2
U1
SSC1S311A
DZBD
ROCP
FB/OLP BD
ST
1
2
4
R1
C3 PC1
C4
RBD1
CBD
RBD2
L1
R9
PC1 R6
R10
R7
C7 R8
U2
R11
VOUT
C8
GND
Figure 5-2. Application Circuit Example 2 (Adjustable Startup Voltage)
SSC1S311A-DSE Rev.1.3
SANKEN ELECTRIC CO., LTD.
7
Dec. 22, 2017
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2012
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