SANKEN SI

●SI-8800L/8900L Series
SI-8800L/8900L Series
Separate Excitation Switching Type with Transformer
■Features
•
•
•
•
•
•
Integrated switching IC and transformer construction
Requires only input/output and soft start capacitors as external components
Low switching noise
Heatsink not required
Built-in overcurrent protection circuit (+5V)
±2–output lineup (SI-8811L, SI-8911L)
■Applications
• Telephone power supplies
• Onboard local power supplies
■Lineup
Ch1
Part Number
Ch2
VO(V)
IO(A)
VO(V)
IO(A)
SI-8811L
+5
0.45
–5
0.05
SI-8911L
+5
0.3
–5
0.1
SI-8921L/8922L
+5
0.6
■Absolute Maximum Rating
Ratings
Symbol
Parameter
SI-8811L
SI-8911L
Unit
SI-8921L
SI-8922L
DC Input Voltage
VIN
35
60
Power Dissipation
PD
1.15
Junction Temperature
Tj
+100
°C
Storage Temperature
Tstg
–25 to +85
°C
1.3
V
1.67
1.67
W
■Recommended Operating Conditions
Ratings
Parameter
Symbol
SI-8811L
min.
typ.
SI-8911L
max.
min.
typ.
SI-8921L
max.
min.
typ.
SI-8922L
max.
min.
typ.
Unit
max.
DC Input Voltage Range
VIN
12
20
30
24
40
55
24
40
55
20
40
55
V
Output Current Range 1
IO1
50
250
450
20
150
300*2
0
300
600
0
300
600
mA
Output Current Range 2
IO2
0
–20
–50*1
0
–50
–100
Operating Temperature Range
Top
–10
+70
–10
*1: Output current 2 depends on the input/output conditions
*2: If IO2=50mA or more, the condition IO1>0.5×IO2 is recommended.
102
+60
mA
–10
+65
–10
+65
°C
●SI-8800L/8900L Series
■Electrical Characteristics
(Ta=25°C)
Ratings
Parameter
Symbol
SI-8811L
VO1
Output Voltage 1
SI-8911L
VO2
η
Efficiency
min.
typ.
max.
min.
typ.
max.
min.
typ.
max.
4.75
5.00
5.25
4.75
5.00
5.25
4.95
5.10
5.20
4.95
5.10
5.20
–5.00
–5.25
–4.75
–5.00
65
f
50
68
∆Vr1
50
50
Voltage 1
Conditions
∆Vr2
Conditions
%
60
68
80
50
80
60
68
80
50
80
kHZ
mVp-p
50
50
mVp-p
Recommended operating conditions (typ.)
22
24
Conditions
Voltage
72
Recommended operating conditions (typ.)
VSt
Operation Starting
72
Recommended operating conditions (typ.)
Switching Ripple
Voltage 2
–5.25
Recommended operating conditions
72
Switching Ripple
V
Recommended operating conditions
Conditions
Switching Frequency
Unit
max.
–4.75
Conditions
SI-8922L
typ.
Conditions
Output Voltage 2
SI-8921L
min.
22
24
17
20
V
Recommended operating conditions (typ.)
■Outline Drawing
(unit: mm)
SI-8811L, 8911L, 8921L, 8922L
19
a
b
22
±0.2
y
±0.2
o
a. Part Number
b. Lot Number
SK
q
16.8
±0.2
t
Open Air Type
Weight: Approx. 9.3g
±0.2
22
±0.1
1
±0.6
0.8max.
(4×P3.175=12.7)
(16.5)
4
,,,,,,,,,,
,,,,,,,,,,,
18
±0.6
Terminal 1 marking
103
●SI-8800L/8900L Series
■Block Diagram
SI-8811L
SI-8911L
3
VIN
(+)
9
VO1
1
9
Tr1
VO1
VIN
1
8
3
T1
Amp.
Vref
T1
Amp.
GND
GND
7
Vref
8
PWM
OSC
VIN
(–)
Start
Drive
PWM
OSC
OCP
Reg.
VO2
7
5
Tr1
VO2
Start
4
2 S.S
Drive
–Reg.
OCP
2 S.S
6
5
6
4
SI-8921L/8922L
7
VIN
1
VO
6
3
Amp.
T1
Vref
PWM
OSC
Start
Drive
Tr1
GND
5
OCP
2 S.S
■Standard External Circuit
VIN
(+)
1
2
+
9
+
C1
SI-8811L
3
4
7
5
6
VIN
C4
GND
8
+
C2
VIN
(–)
VO1
+
C5
VO2
+
C3
: 35V/470µF
: 16V/10µF
: 10V/220µF
: 16V/1200µF
: 10V/47µF
C1,2,3,5 : Nippon Chemi-con SME Series or equivalent
C4
: Nippon Chemi-con SXE Series or equivalent
1
2
+
9
3 SI-8911L 8
+
C1
C2
4
C3
+
VO1
+
7
5
+
C4
GND
C5
6
C1(for smoothing VIN)
C2(for soft start)
C3(for smoothing VO2Reg input)
C4(for smoothing VO1)
C5(for smoothing VO2)
: 63V/220µF
: 10V/33µF
: 10V/220µF
: 16V/1200µF
: 10V/100µF
VO2
C1,2,3,5 : Nippon Chemi-con SME Series or equivalent
C4
: Nippon Chemi-con SXE Series or equivalent
GND
VIN
1
C1(for smoothing VIN)
C2(for soft start)
C3(for smoothing VO2)
2 SI-8921L 7
+
+
C1
C2
GND
104
C1(for smoothing VIN)
C2(for soft start)
C3(for smoothing VO2Reg input)
C4(for smoothing VO1)
C5(for smoothing VO2)
3 SI-8922L 6
4
5
+
C3
: 63V/180µF
: 10V/22µF
: 10V/1200µF
VO
GND
C1,2
C3
: Nippon Chemi-con SME Series or equivalent
: Nippon Chemi-con SXE Series or equivalent
●SI-8800L/8900L Series
■Ta-PD Characteristics
SI-8811L
0.5
0
0
25
50
75
Ambient Temperature Ta (°C)
100
100
–1
ηχ
SI-8911L
VO :Output voltage
IO :Output current
ηχ :Efficiency (%)
1.0
0.5
0
0
25
50
SI-8921L
8922L
1.0
PD=VO•IO
SI-8911L
Power Dissipation PD (W)
Power Dissipation PD (W)
SI-8921L
8922L
1.5
1.5
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.
■Caution
1. A low-impedance capacitor suitable for switching applications must be used for the external capacitor and must be connected as close to the
IC as possible in order to assure low ripple voltage and stable switching operation.
2. The SI-881L/8911L series does not have a built-in overcurrent protection circuit on terminal VO2(–5V). Thus, avoid short-circuit conditions that
may cause an overcurrent.
3. Do not connect VIN(–) of SI-8811L to GND. The overcurrent protection circuit may not work if they are connected.
4. Terminals left unconnected in the connection diagram must not be connected to other circuits.
5. The IC's metallic heatsink is electrically floating. Do not connect it to GND or any other circuit.
6. Since the SI-8800L and 8900L series have an open-package construction, they can be operated in specific environments. Verify the operating
environment and use the IC within the conditions indicated in the reliability data.
105
●SI-8800L/8900L Series
■Typical Characteristics
(Ta=25°C)
SI-8811L
SI-8911L
Rise Characteristics
lO1=50mA lO2 =0mA
lO1=250mA lO2 =–20mA
2
lO1=450mA lO2 =–50mA
0
2
4
6
8
10 12
–2
14 16 18
VIN
20 (V)
lO1=50mA lO2 =0mA
lO1=250mA lO2 =–20mA
lO1=450mA lO2 =–50mA
–4
Rise Characteristics
6
6
4
5
lO1
20 to 30mA
2
0
5
10
20
25
30
35
VIN
40 (V)
–2
lO2
0 to 100mA
Efficiency Characteristics
25V
30V
Efficiency η (%)
65
10
15
20
25
30
35
40
VIN=55
45
V
70
70
60
5
Efficiency Characteristics
55V
VIN=
70
2
80
V
40
60
Efficiency η (%)
75
3
Input Voltage VIN (V)
80
VIN=12V
15V
20V
4
0
0
Input Voltage VIN (V)
Efficiency Characteristics
80
0.3A
1
–4
Input Voltage VIN (V)
Efficiency η (%)
15
–6
–6
0.6A
lO=0
Output Voltage VO (V)
4
VO2 (V) Output Voltage VO1 (V)
VO2 (V) Output Voltage VO1 (V)
6
SI-8921L
Rise Characteristics
V
24
50
40
48
40VV
30V
24V
50
40
30
60
30
20
IO2 = –50mA constant
0
0 50
IO2 = –100mA constant
100 150 200 250 300 350 400 450 500
Output Current 1 lO1 (A)
SI-8922L
8
6
3
0.6A
0.5A
IO=0.4A
Output Voltage VO (V)
7
4
2
1
00
10
30
20
40
Input Voltage VIN (V)
Efficiency Characteristics
80
VIN=55
V
48V
40V
30V
24V
Efficiency η (%)
70
60
50
40
30
20
00
0.1
0.2
0.3
0.4
0.5
0.6
Output Current lO (A)
106
50
100
150
200
250
300
Output Current 1 lO1 (A)
Rise Characteristics
5
0
0
0.7
0.8
350
400
0
0
0.1
0.2
0.3
0.4
0.5
0.6
Output Current lO (A)
0.7
0.8