SANKEN SI

●SI-8400L/8500L Series
SI-8400L/8500L Series
Separate Excitation Switching Type with Coil
■Features
•
•
•
•
•
•
Integrated switching IC and coil construction
Requires 2 external components only
Low switching noise
Heatsink not required
Built-in overcurrent and thermal protection circuits
Built-in soft start circuit (Output ON/OFF control)...SI-8500L Series
■Applications
• Telephone power supplies
• Onboard local power supplies
■Lineup
Part Number
SI-8401L
SI-8402L
SI-8403L
SI-8405L
SI-8501L
SI-8502L
SI-8503L
SI-8504L
SI-8505L
VO(V)
5.0
12.0
3.3
15.0
5.0
12.0
3.3
9.0
15.0
IO(A)
0.5
0.4
0.5
0.4
1.0
■Absolute Maximum Ratings
Parameter
Ratings
Symbol
Unit
SI-8400L
SI-8500L
DC Input Voltage
VIN
Power Dissipation
PD
35
V
Junction Temperature
Tj
+100
°C
Storage Temperature
Tstg
–25 to +85
°C
1.25
3
W
■Recommended Operating Conditions
Parameter
Ratings
Symbol
Unit
SI-8401L
SI-8402L
SI-8403L
SI-8405L
VIN
7 to 33
15 to 33
5.3 to 33
18 to 33
Output Current Range
IO
0 to 0.5
0 to 0.4
0 to 0.5
0 to 0.4
Operating Temperature Range
Top
DC Input Voltage Range
Parameter
DC Input Voltage Range
VIN
A
°C
–20 to +85
Ratings
Symbol
V
Unit
SI-8501L
SI-8502L
SI-8503L
SI-8504L
SI-8505L
7 to 33
15 to 33
5.3 to 33
12 to 33
18 to 33
V
Output Current Range
IO
0 to 1.0
A
Operating Temperature Range
Top
–20 to +85
°C
96
●SI-8400L/8500L Series
■Electrical Characteristics
(Ta=25°C)
Ratings
Parameter
Output Voltage
Symbol
VO
SI-8401L
typ.
max.
min.
typ.
max.
min.
typ.
max.
4.80
5.00
5.20
11.40
12.00
12.60
3.17
3.30
3.43
14.25
15.00
15.75
VIN=20V, IO=0.3A
η
Load Regulation
Temperature Coefficient of Output Voltage
Switching Ripple
Voltage (C2=470µF)
Overcurrent Protection
Starting Current
VIN=15V, IO=0.3A
88
75
89
VIN=24V, IO=0.3A
VIN=15V, IO=0.3A
VIN=27V, IO=0.3A
%
60
60
60
60
VIN=20V, IO=0.3A
VIN=24V, IO=0.3A
VIN=15V, IO=0.3A
VIN=27V, IO=0.3A
80
100
100
130
60
80
kHZ
100
130
VIN=10 to 30V, IO=0.3A
VIN=18 to 30V, IO=0.3A
VIN=8 to 30V, IO=0.3A
VIN=21 to 30V, IO=0.3A
30
70
20
90
∆VOLOAD
40
95
30
VIN=24V, IO=0.1 to 0.4A
VIN=15V, IO=0.1 to 0.4A
VIN=27V, IO=0.1 to 0.4A
∆VO/∆Ta
±0.5
±1.5
±0.5
±1.5
∆Vr
20
Conditions
IS1
35
VIN=20V, IO=0.3A
15
VIN=24V, IO=0.3A
0.55
Conditions
70
40
VIN=15V, IO=0.3A
0.45
VIN=10V
30
0.55
VIN=18V
mV
120
VIN=20V, IO=0.1 to 0.4A
40
V
VIN=27V, IO=0.3A
80
∆VOLINE
Conditions
VIN=24V, IO=0.3A
VIN=20V, IO=0.3A
f
Conditions
Unit
min.
Conditions
Line Regulation
SI-8405L
max.
Conditions
Switching Frequency
SI-8403L
typ.
Conditions
Efficiency
SI-8402L
min.
mV
mV/°C
80
mVp-p
VIN=27V, IO=0.3A
0.45
VIN=8V
A
VIN=21V
(Ta=25°C)
Ratings
Parameter
Output Voltage
Symbol
VO
Conditions
Efficiency
Line Regulation
Switching Ripple
Voltage (C2=470µF)
Overcurrent Protection
Starting Current
5.20
VIN=20V, IO=0.5A
SI-8503L
typ. max. min.
11.40 12.00 12.60
VIN=24V, IO=0.5A
3.17
SI-8504L
SI-8505L
typ. max. min.
typ. max. min.
3.30
9.00
3.43
VIN=15V, IO=0.5A
8.55
9.45
VIN=21V, IO=0.5A
Unit
typ. max.
14.25 15.00 15.75
83
89
79
87
90
VIN=24V, IO=0.5A
VIN=15V, IO=0.5A
VIN=21V, IO=0.5A
VIN=25V, IO=0.5A
60
60
60
60
60
VIN=20V, IO=0.5A
VIN=24V, IO=0.5A
VIN=15V, IO=0.5A
VIN=21V, IO=0.5A
VIN=25V, IO=0.5A
70
130
VIN=10 to 30V, IO=0.5A
30
70
130
VIN=18 to 30V, IO=0.5A
55
30
50
80
VIN=8 to 30V, IO=0.5A
55
20
70
130
VIN=15 to 30V, IO=0.5A
45
30
70
%
kHZ
130
55
30
55
VIN=24V, IO=0.2 to 0.8A
VIN=15V, IO=0.2 to 0.8A
VIN=21V, IO=0.2 to 0.8A
VIN=25V, IO=0.2 to 0.8A
∆VO/∆Ta
±0.5
±1.5
±0.5
±1.0
±1.5
∆Vr
45
30
15
25
30
VIN=20V, IO=0.5A
VIN=24V, IO=0.5A
VIN=15V, IO=0.5A
VIN=21V, IO=0.5A
VIN=25V, IO=0.5A
1.1
1.1
1.1
1.1
IS1
Conditions
VIN=18V
VIN=24V
VIN=12V
1.1
VIN=21V
mV
VIN=21 to 30V, IO=0.5A
VIN=20V, IO=0.2 to 0.8A
Conditions
V
VIN=25V, IO=0.5A
VIN=20V, IO=0.5A
∆VOLOAD
Conditions
Temperature Coefficient of Output Voltage
5.00
∆VOLINE
Conditions
Load Regulation
typ. max. min.
4.80
f
Conditions
SI-8502L
min.
η
Conditions
Switching Frequency
SI-8501L
mV
mV/°C
mVp-p
A
VIN=25V
97
●SI-8400L/8500L Series
■Outline Drawing
(unit:mm)
SI-8400L
SI-8500L
VIN
y
LIN
r
e LIN
b
w GND
14.5±0.5
b
a
a. Part Number
b. Lot Number
Open Air Type
Weight: Approx. 14.5g
26±0.1
12
a
Vo q
a. Part Number
b. Lot Number
Open Air Type
Weight: Approx. 5.1g
±0.5
VIN r
SK
Terminal 1 marking
13.2
(7.62)
(2.19)
18
(10.16)
3.7
±0.6
4.7
φ 0.8max.
(2.17)
Terminal 1 marking
,,,,,,
,,,,
,,,,
,,,
10
±0.2
±0.6
q w e
VOUT SS GND
±0.1
26
φ 0.6
4
2
18
■Block Diagram
SI-8400L
SI-8500L
3
4
LIN
4
L1
MIC1
VIN
Reg.
OSC
1
6
VO
VIN
OCP
OSC
Reset
Comp.
TSD
Latch
&
Drive
TSD
Di1
Di1
Amp.
Amp.
VREF
VREF
2
2
GND
S.S.
3
GND
■Standard External Circuit
VIN
4
+
C1
220µF
VIN
SI-8400L
GND
2
GND
Pin compatible with SI-8200L
98
VOUT
LIN
3
N.C
VO
1
+
VIN
6
+
C1
470µF
C2
470µF
GND
GND
1
VO
Reg.
Latch
&
Drive
Comp.
L1
MIC1
OCP
Reset
LIN
VIN
S.S
2
C3
SI-8500L
VOUT
GND LIN
3
4
VO
1
+
C2
470µF
N.C
GND
C3 is necessary only for using soft start function.
Pin compatible with SI-8300L
●SI-8400L/8500L Series
■Ta-PD Characteristics
3.0
1.5
1.0
0.5
0
0
25
50
75
Ambient Temperature Ta (°C)
PD=VO•IO
SI-8500L
Power Dissipation PD (W)
Power Dissipation PD (W)
SI-8400L
100
VO :Output voltage
IO :Output current
ηχ :Efficiency (%)
2.0
1.0
0
0
100
–1
ηχ
25
50
75
Ambient Temperature Ta (°C)
100
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.
■SI-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 calculate 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.
SI-8500L
SI-8500L
SI-8500L
2 S.S.
2 S.S.
2 S.S.
C3
VO. ON/OFF
Soft start
C3
Soft start +VO ON/OFF
■Caution
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.
99
●SI-8400L/8500L Series
■Typical Characteristics (SI-8400L Series)
Rise Characteristics(SI-8401L)
Efficiency Characteristics(SI-8401L)
Ta=25°C
6
100
5.2
Efficiency η (%)
A
A
0.5
=0
IO
3
0.3A
2
20V
25V
33V
10V
7V
80
70
VIN
7V
10V
20V
60 25V
33V
Output Voltage VO (V)
0.1A
4
Ta=25°C
5.3
90
5
Output Voltage VO (V)
Load Regulation(SI-8401L)
Ta=25°C
5.1
20V
VIN=33V
5.0
10V
7V
4.9
4.8
1
50
4
6
8
0
0
10
0.1
Temperature Characteristics(SI-8401L)
0.4
0
0
0.5
70
5.1
5.0
VO
60
4.9
f
50
4.8
40
4.7
–20
0
20
40
60
80
4
3
2
0.5
VIN=20V, IO=20mA
4
3
2
1
0
0
100 0
0.4
5
1
0 –40
0.3
6
20V
5
0.2
Thermal Protection Characteristics(SI-8401L)
V
80
5.2
=7
η
0.1
Output Current IO (A)
Ta=25°C
VIN
90
6
Output Voltage VO (V)
Efficiency η (%) Frequency f (kHz)
0.3
Overcurrent Protection Characteristics(SI-8401L)
5.3
Output Voltage VO (V)
VIN=20V, IO=0.3A
100
0.2
Output Current IO (A)
Input Voltage VIN (V)
Output Voltage VO (V)
2
V
0
33
0
0.5
1.0
1.5
0
2.0
0
Output Current IO (A)
Ambient Temperature Ta (°C)
50
100
150
200
Case Temperature TC (°C)
Note on Thermal Protection:
The thermal protection circuit is intended for protection against heat during instantaneous shortcircuiting. Its operation is not guaranteed for shortcircuiting over extended periods of time.
Rise Characteristics(SI-8402L)
Efficiency Characteristics(SI-8402L)
Ta=25°C
14
4
70
60
5
10
15
Input Voltage VIN (V)
20
0
0
12.1
VIN=33V
24V
12.0
20V
15V
11.9
11.8
50
2
100
80
Output Voltage VO (V)
6
0
0
12.2
33 24 VI
V V N=
15
V
Efficiency η (%)
8
4A
I O=
0A
10
Ta=25°C
12.3
90
0.2A
0.
Output Voltage VO (V)
12
Load Regulation(SI-8402L)
Ta=25°C
100
0.1
0.2
0.3
Output Current IO (A)
0.4
0
0
0.1
0.2
0.3
Output Current IO (A)
0.4
●SI-8400L/8500L Series
■Typical Characteristics (SI-8500L Series)
Rise Characteristics(SI-8501L)
Efficiency Characteristics(SI-8501L)
Ta=25°C
7
100
3
80
60
50
1
40
0
5
10
15
20V
V
33
70
2
0
Output Voltage VO (V)
0.5A
VIN=
0
20
7
5.10
6
0.25
0
5.00
70
VO
f
4.95
50
4.90
40
4.85
0
40
0.75
0
0
1
0.5
0.75
1
Thermal Protection Characteristics(SI-8401L)
Ta=25°C
VIN=20V, IO=0A
7
6
5
4
3
20V
2
5
4
3
2
1
1
0
120
80
0.25
Output Current IO (A)
33V
5.05
80
0
–40
0.5
VIN=7V
η
Output Voltage VO (V)
90
5.15
15V
7V
4.90
Overcurrent Protection Characteristics(SI-8401L)
Output Voltage VO (V)
VIN=20V, IO=0.5A
VIN =33V
20V
4.95
Output Current IO (A)
Temperature Characteristics(SI-8401L)
60
5.00
4.85
Input Voltage VIN (V)
100
5.05
Output Voltage VO (V)
4
Efficiency η (%)
IO =
0A
1A
Output Voltage VO (V)
5.10
7V
5
Ta=25°C
5.15
90
6
Efficiency η (%) Frequency f (kHz)
Load Regulation(SI-8501L)
Ta=25°C
0
0
1
Ambient Temperature Ta (°C)
2
3
0
0
4
40
80
120
160
Ambient Temperature Ta (°C)
Output Current IO (A)
Note on Thermal Protection:
The thermal protection circuit is intended for protection against heat during instantaneous shortcircuiting. Its operation is not guaranteed for shortcircuiting over extended periods of time.
Rise Characteristics(SI-8502L)
Efficiency Characteristics(SI-8502L)
Efficiency η (%)
1A
8
6
4
2
0
0
V
80
24
0.5A
10
VIN
12.2
=1
3V
3
70
60
50
10
15
Input Voltage VIN (V)
20
0
0
12.1
24V
VIN=33V
12.0
18V
15V
11.9
11.8
11.7
40
5
Ta=25°C
12.3
5V
90
IO=
0A
Output Voltage VO (V)
12
Load Regulation(SI-8502L)
Ta=25°C
100
Output Voltage VO (V)
Ta=25°C
14
0.25
0.5
0.75
Output Current IO (A)
1.0
00
0.25
0.5
0.75
1
Output Current IO (A)
101