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GSI-8400L/8500L Series
SI-8400L/8500L Series
Separate Excitation Switching Type with Coil
IFeatures
* * * * * * 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
IApplications
* Telephone power supplies * Onboard local power supplies
ILineup
Part Number VO(V) IO(A) SI-8401L 5.0 0.5 SI-8402L 12.0 0.4 SI-8403L 3.3 0.5 SI-8405L 15.0 0.4 SI-8501L 5.0 SI-8502L 12.0 SI-8503L 3.3 1.0 SI-8504L 9.0 SI-8505L 15.0
IAbsolute Maximum Ratings
Parameter DC Input Voltage Power Dissipation Junction Temperature Storage Temperature Symbol SI-8400L VIN PD Tj Tstg 1.25 +100 -25 to +85 35 3 Ratings SI-8500L V W C C Unit
IRecommended Operating Conditions
Parameter DC Input Voltage Range Output Current Range Operating Temperature Range Symbol SI-8401L VIN IO Top 7 to 33 0 to 0.5 15 to 33 0 to 0.4 Ratings SI-8402L SI-8403L 5.3 to 33 0 to 0.5 SI-8405L 18 to 33 0 to 0.4 V A C Unit
-20 to +85
Parameter DC Input Voltage Range Output Current Range Operating Temperature Range
Symbol SI-8501L VIN IO Top 7 to 33 SI-8502L 15 to 33
Ratings SI-8503L 5.3 to 33 0 to 1.0 -20 to +85 SI-8504L 12 to 33 SI-8505L 18 to 33
Unit V A C
82
GSI-8400L/8500L Series
IElectrical Characteristics
Ratings Parameter Symbol min. Output Voltage Efficiency Switching Frequency Line Regulation Load Regulation Temperature Coefficient of Output Voltage Switching Ripple Voltage (C2=470F) Overcurrent Protection Starting Current VO Conditions Conditions f Conditions VOLINE Conditions VOLOAD Conditions VO/Ta Vr Conditions IS1 Conditions 0.55 VIN=10V 4.80 SI-8401L typ. 5.00 80 VIN=20V, IO=0.3A 60 VIN=20V, IO=0.3A 80 30 0.5 20 40 0.45 VIN=18V VIN=20V, IO=0.3A 100 40 VIN=10 to 30V, IO=0.3A VIN=20V, IO=0.1 to 0.4A max. 5.20 min. 11.40 SI-8402L typ. 12.00 88 VIN=24V, IO=0.3A 60 VIN=24V, IO=0.3A 100 70 1.5 35 70 0.55 VIN=8V VIN=24V, IO=0.3A 130 95 VIN=18 to 30V, IO=0.3A VIN=24V, IO=0.1 to 0.4A max. 12.60 min. 3.17 SI-8403L typ. 3.30 75 VIN=15V, IO=0.3A 60 VIN=15V, IO=0.3A 60 20 0.5 15 30 0.45 VIN=21V VIN=15V, IO=0.3A 80 30 VIN=8 to 30V, IO=0.3A VIN=15V, IO=0.1 to 0.4A max. 3.43 min. 14.25 SI-8405L typ. 15.00 89 VIN=27V, IO=0.3A 60 VIN=27V, IO=0.3A 100 90 1.5 40 80 VIN=27V, IO=0.3A 130 120 max. 15.75
(Ta=25C)
Unit
V % kHZ mV mV mV/C mVp-p A
VIN=20V, IO=0.3A
VIN=24V, IO=0.3A
VIN=15V, IO=0.3A
VIN=27V, IO=0.3A
VIN=21 to 30V, IO=0.3A VIN=27V, IO=0.1 to 0.4A
(Ta=25C)
Ratings Parameter Symbol VO Conditions Efficiency Switching Frequency Line Regulation Load Regulation Temperature Coefficient of Output Voltage Switching Ripple Voltage (C2=470F) Overcurrent Protection Starting Current Conditions f Conditions VOLINE Conditions VOLOAD Conditions VO/Ta Vr Conditions IS1 Conditions 1.1 VIN=18V 4.80 SI-8501L min. Output Voltage 5.00 83 VIN=20V, IO=0.5A 60 VIN=20V, IO=0.5A 70 30 0.5 45 VIN=20V, IO=0.5A 1.1 VIN=24V 130 55 VIN=10 to 30V, IO=0.5A VIN=20V, IO=0.2 to 0.8A 5.20 SI-8502L 11.40 12.00 12.60 VIN=24V, IO=0.5A 89 VIN=24V, IO=0.5A 60 VIN=24V, IO=0.5A 70 30 1.5 30 VIN=24V, IO=0.5A 1.1 VIN=12V 130 55 VIN=18 to 30V, IO=0.5A VIN=24V, IO=0.2 to 0.8A 3.17 SI-8503L 3.30 79 VIN=15V, IO=0.5A 60 VIN=15V, IO=0.5A 50 20 0.5 15 VIN=15V, IO=0.5A 1.1 VIN=21V 80 45 VIN=8 to 30V, IO=0.5A VIN=15V, IO=0.2 to 0.8A 3.43 8.55 SI-8504L 9.00 87 VIN=21V, IO=0.5A 60 VIN=21V, IO=0.5A 70 30 1.0 25 VIN=21V, IO=0.5A 1.1 VIN=25V 130 55 VIN=15 to 30V, IO=0.5A VIN=21V, IO=0.2 to 0.8A 9.45 SI-8505L typ. max. V % kHZ 130 55 mV mV mV/C mVp-p A 14.25 15.00 15.75 VIN=25V, IO=0.5A 90 VIN=25V, IO=0.5A 60 VIN=25V, IO=0.5A 70 30 1.5 30 VIN=25V, IO=0.5A VIN=21 to 30V, IO=0.5A VIN=25V, IO=0.2 to 0.8A Unit typ. max. min. typ. max. min. typ. max. min. typ. max. min.
VIN=20V, IO=0.5A
VIN=15V, IO=0.5A
VIN=21V, IO=0.5A
83
GSI-8400L/8500L Series
IExternal Dimensions
SI-8400L
VIN y
VIN r e LIN
(unit:mm)
SI-8500L
LIN r
a b
Vo q 14.5
0.5
w GND
a. Part Number b. Lot Number Open Air Type Weight: Approx. 5.1g
SK
Terminal 1 marking
0.2
13.2
qwe VOUT SS GND 0.1 26
0.6
10
0.6
4
3.7
18
(2.17)
(10.16)
4.7
0.8max.
0.6
;;;; ;;;; ;;;; ;;;; ;
Terminal 1 marking
(7.62)
(2.19)
26
a
b
a. Part Number b. Lot Number Open Air Type Weight: Approx. 14.5g
120.5
0.1
18
2
IBlock Diagram
SI-8400L
3 4 VIN Reg. OSC Reset OCP Latch & Drive TSD Di1 Amp.
Amp.
SI-8500L
LIN L1 1 VO
6 VIN Reg. OSC Reset OCP Latch & Drive TSD Di1 MIC1
4
LIN L1 1 VO
MIC1
Comp.
Comp.
VREF
VREF
2
GND
2
S.S.
3
GND
IStandard External Circuit
VIN
4 + C1 220F
VIN
SI-8400L GND 2
VOUT LIN 3 N.C
1 +
VO
VIN
6 + C1 470F
VIN S.S 2 C3
SI-8500L
VOUT
1 +
VO
C2 470F GND
GND LIN 3 4 N.C
C2 470F GND
GND
GND
Pin compatible with SI-8200L
C3 is necessary only for using soft start function. Pin compatible with SI-8300L
84
GSI-8400L/8500L Series
ITa-PD Characteristics
1.5
3.0
SI-8400L
Power Dissipation PD (W)
SI-8500L
PD=VO*IO
100 -1
Power Dissipation PD (W)
1.0
2.0
VO :Output voltage IO :Output current :Efficiency (%) The efficiency depends on the input voltage and the output current. Thus, obtain the value from the efficiency graphs on p.86, 87 and substitute the percentage in the formula above.
0.5
1.0
0 0
25
50
75
100
0 0
25
50
75
100
Ambient Temperature Ta (C)
Ambient Temperature Ta (C)
ISI-8500L application circuit
Terminal no.2 is for soft start. Connecting a capacitor to the terminal enables the soft start function. See page 77 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. C3
2 S.S. C3
VO. ON/OFF
Soft start
Soft start +VO ON/OFF
ICaution
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.
85
GSI-8400L/8500L Series
ITypical Characteristics (SI-8400L Series)
Output Voltage(SI-8401L)
6 Ta=25C
Efficiency Characteristics(SI-8401L)
100 Ta=25C
Load Regulation(SI-8401L)
5.3 Ta=25C
5
90 20V 25V 33V 10V 7V
5.2
Output Voltage VO (V)
Output Voltage VO (V)
0.1A
Efficiency (%)
4
A
80 VIN 7V 10V
5.1 VIN=33V 5.0 10V 7V 20V
=0
3 2
IO
0.5
A
0.3A
70
20V 60 25V 33V 50
4.9
1
4.8 0 0
0
0
2
4
6
8
10
0 0
0.1
0.2
0.3
0.4
0.5
0.1
0.2
0.3
0.4
0.5
Input Voltage VIN (V)
Output Current IO (A)
Output Current IO (A)
Temperature Characteristics(SI-8401L)
100 VIN=20V, IO=0.3A 5.3 5.2 5.1 5.0 4.9 f 50 40 0 -40 -20 0 20 40 60 80 4.8 4.7 100 0
Overcurrent Protection Characteristics(SI-8401L)
6 Ta=25C
Thermal Protection Characteristics(SI-8401L)
6 VIN=20V, IO=20mA
Efficiency (%) Frequency f (kHz)
90 80 70 60
5
5
20V
Output Voltage VO (V)
Output Voltage VO (V)
Output Voltage VO (V)
1.5 2.0
4 3
=7 V
4
V
VIN
VO
2
33
3
2
1 0 0
1 0
0.5
1.0
0
50
100
150
200
Ambient Temperature Ta (C)
Output Current IO (A)
Case Temperature TC (C)
Note on Thermal Protection:
The thermal protection circuit is intended for protection against heat during instantaneous short-circuiting. Its operation is not guaranteed for continuous heating condition such as short-circuiting over extended periods of time.
Output Voltage(SI-8402L)
14 12 Ta=25C
Efficiency Characteristics(SI-8402L)
100 Ta=25C
Load Regulation(SI-8402L)
12.3 Ta=25C
90
12.2
Output Voltage VO (V)
Efficiency (%)
10 8 6 4 2 0 0
Output Voltage VO (V)
33 24 VI V V N= 15
0.2A 80
V
12.1 VIN=33V 24V 20V 15V 11.9
IO= 0A 0. 4A
70
12.0
60
50 0 0
11.8
5
10
15
20
0.1
0.2
0.3
0.4
0
0
0.1
0.2
0.3
0.4
Input Voltage VIN (V)
Output Current IO (A)
Output Current IO (A)
86
GSI-8400L/8500L Series
ITypical Characteristics (SI-8500L Series)
Output Voltage(SI-8501L)
7 6 Ta=25C
Efficiency Characteristics(SI-8501L)
100 90 Ta=25C
Load Regulation(SI-8501L)
5.15 5.10 Ta=25C
Output Voltage VO (V)
Output Voltage VO (V)
Efficiency (%)
5
0A IO =
1A
80 70 60 50 40 0
VIN=
7V
4 3 2 1 0
0.5A
20V V 33
5.05 5.00 4.95 4.90 4.85
VIN =33V 20V
15V 7V
0
5
10
15
20
0
0.25
0.5
0.75
1
0 0
0.25
0.5
0.75
1
Input Voltage VIN (V)
Output Current IO (A)
Output Current IO (A)
Temperature Characteristics(SI-8401L)
100 VIN=20V, IO=0.5A 5.15 5.10
Overcurrent Protection Characteristics(SI-8401L)
7 6 Ta=25C
Thermal Protection Characteristics(SI-8401L)
7 6 VIN=20V, IO=0A
Efficiency (%) Frequency f (kHz)
90 80 70 60 50 40 0 -40 VO f
Output Voltage VO (V)
Output Voltage VO (V)
5.05 5.00 4.95 4.90 4.85 0 120
Output Voltage VO (V)
5 4
VIN=7V
5 4 3 2 1 0 0
3 2 1 0 0
33V
20V
0
40
80
1
2
3
4
40
80
120
160
Ambient Temperature Ta (C)
Output Current IO (A)
Ambient Temperature Ta (C)
Note on Thermal Protection:
The thermal protection circuit is intended for protection against heat during instantaneous short-circuiting. Its operation is not guaranteed for continuous heating condition such as short-circuiting over extended periods of time.
Output Voltage(SI-8502L)
14 12 Ta=25C
Efficiency Characteristics(SI-8502L)
100 90
24
Load Regulation(SI-8502L)
12.3 12.2 Ta=25C
Ta=25C
=1 VIN
V
5V
Output Voltage VO (V)
10 8 6 4 2 0 0
0.5A
Output Voltage VO (V)
80
V 33
12.1 VIN=33V 12.0 11.9 11.8 11.7 00 18V 15V 24V
Efficiency (%)
0A
IO=
70 60 50 40 0 0
1A
5
10
15
20
0.25
0.5
0.75
1.0
0.25
0.5
0.75
1
Input Voltage VIN (V)
Output Current IO (A)
Output Current IO (A)
87

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