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SI-8504L 数据表(PDF) 4 Page - Sanken electric

部件名 SI-8504L
功能描述  Separate Excitation Switching Type with Coil
Download  6 Pages
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制造商  SANKEN [Sanken electric]
网页  http://www.sanken-ele.co.jp/en
标志 SANKEN - Sanken electric

SI-8504L 数据表(HTML) 4 Page - Sanken electric

  SI-8504L Datasheet HTML 1Page - Sanken electric SI-8504L Datasheet HTML 2Page - Sanken electric SI-8504L Datasheet HTML 3Page - Sanken electric SI-8504L Datasheet HTML 4Page - Sanken electric SI-8504L Datasheet HTML 5Page - Sanken electric SI-8504L Datasheet HTML 6Page - Sanken electric  
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99
sTa-PD Characteristics
sSI-8500L application circuit
Terminal no.2 is for soft start. Connecting a capacitor to the terminal
enables the soft start function. See page 85 for the formulas to calcu-
late delay time and rise time. Output can be turned on and off by
using the soft start terminal. To stop output, set the soft start terminal
voltage to VSSL (0.2V typ.) or less. To switch the potential of the soft
start terminal, drive the open collector of the transistor. Since the
discharge current from C3 flows to the ON/OFF control transistor, limit
the current for protection. The SS terminal is pulled up to the power
supply in the IC and no external voltage can be applied.
sCaution
1. Allocation of Components
For the best operating environment, the ground should be a single ground line at the GND terminal (terminal 2 on the SI-8400L, terminal 3 on
the SI-8500L), and the wiring from C1 and C2 to ground should be as short as possible.
2. Capacitors C1 and C2
1) They must satisfy the breakdown voltage and allowable ripple current.
Exceeding the ratings of these capacitors or using them without derating shortens their service lives and may also cause abnormal
oscillation of the IC.
2) C2 must be a low-impedance type capacitor to ensure minimum ripple voltage and stable switching operation.
3) C3 (SI-8500L only) is a capacitor for soft start. When not using soft start, leave terminal 2 open. It is pulled up inside the IC.
3. Terminals LIN and NC in the connection diagram must be left unconnected to other circuits.
4. The IC's metalic heatsink is electrically floating. Do not connect it to GND or any other circuit.
5. Since the SI-8400L and 8500L series have an open-package construction, they can only be operated in specific environments. Verify the
operating environment and use the conditions indicated in the reliability data.
1.5
1.0
0.5
0
025
50
Ambient Temperature Ta (
°C)
75
100
SI-8400L
3.0
2.0
1.0
0
0
25
50
75
100
SI-8500L
Ambient Temperature Ta (
°C)
SI-8500L
SI-8500L
S.S.
2
S.S.
2
S.S.
C3
C3
2
VO. ON/OFF
Soft start
Soft start +VO ON/OFF
SI-8500L
qSI-8400L/8500L Series
VO :Output voltage
IO :Output current
ηχ :Efficiency (%)
The efficiency depends on the input
voltage and the output current.Thus,
obtain the value from the efficiency
graph and substitute the percentage
in the formula above.
PD=VO•IO
100
–1
ηχ


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