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PDF STA801M Data sheet ( Hoja de datos )
| Número de pieza | STA801M | |
| Descripción | (STA801M / STA802M) 2-Output Separate Excitation Switching Type | |
| Fabricantes | Sanken electric | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STA801M (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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qSTA801M/802M
STA801M/802M
2-Output Separate Excitation Switching Type
sFeatures
• 2 regulators combined 1 package
• Compact inline package
• Output current (0.5A × 2 output)
• Output voltage of Ch2 selectable from 4 levels.
• Built-in flywheel diode (Schottky barrier diode)
• Requires only 7 external components (2 outputs)
• Phase correction and output voltage adjustment performed internally
• Built-in reference oscillator (125kHz) - Compact choke coil can be used
due to high frequency (compared to existing Sanken product)
• Built-in overcurrent and thermal protection circuits
• Built-in soft start circuit (Output ON/OFF control)
sApplications
• For BS and CS antenna power supplies
• For stabilization of the secondary stage of switching power supplies
• Electronic equipment
sLineup
Part Number
STA801M
STA802M
Output Voltage (V)
Ch1
5
9
Ch2(Select one output)
9.0 / 11.5 / 12.1 / 15.5
9.1 / 11.7 / 12.1 / 15.7
sAbsolute Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Symbol
VIN
PD1
PD2
Tj
Tstg
Ratings
43
6.7(With infinite heatsink)
1.6(Without heatsink, stand-alone operation)
+125
–40 to +125
Unit
V
W
W
°C
°C
sRecommended Operating Conditions
Parameter
Symbol
DC Input Voltage Range
Output Current Range per Channel
Operating Temperature Range
VIN
IO
Tjop
min.
Ch2 VOmax.+2
0
–20
Ratings
max.
40
0.5
+125
Unit
V
A
°C
108
1 page  
qSTA801M/802M
sSelecting External Components
1. Inductors L1 and L2
(1) Suitable for switching regulators
Do not use a coil as a noise filter because it generates excess heat.
(2) Appropriate inductance
A low inductance may cause abnormal oscillation, or cause the overcurrent protection circuit to malfunction in the rated current range.
(3) Satisfying the rated current
Exceeding the rated current may generate an extremely high current to flow due to magnetic saturation.
2. Capacitors C1, C2, and C3
(1) Satisfy the breakdown voltage and allowable ripple current
Exceeding the ratings of these capacitors or using them without derating may shorten their service lives and also cause abnormal oscillation.
(2) Low impedance (C2, and C3)
A low-impedance model is recommended for C2 and C3 to reduce the ripple voltage and stabilize switching. For stable operation throughout
the input voltage range, however, the DC equivalent series resistance (ESR) of C2 and C3 should be 0.1 ohm or less.
3. Capacitors C4 and C5
(1) C4 and C5 are soft-start capacitors.
sSelecting Ch2 Output Voltage
When the VO2Cont terminal voltage is set to 0.5V or less, the output voltage changes to the values shown below. To switch the potential at the VO2Cont
terminal, drive the open collector of the transistor. No external voltage can be applied to the terminal. Leave the terminal open when not in use
because the terminal is already pulled up in the IC. When using terminal no. 9, short it to terminal no. 10.
( ): STA802M
7
STA800M 10
9
1 VO2 Cont
VO2
9V (9.1V)
+
12.1V (12.1V)
7
STA800M
10
1 VO2 Cont
VO2
11.5V (11.7V)
+
15.5V (15.7V)
VO2 output voltage
VO2 sensing
terminal
VO2Cont terminal
(1 pin)
9pin
10pin
STA801M
OPEN
9V
11.5V
Low
12.1V
15.5V
STA802M
OPEN
9.1V
11.7V
Low
12.1V
15.7V
Low : 0.5V or less
sSoft Start ON/OFF Circuit
Terminal nos. 3 and 8 are soft start terminals. Connect a capacitor to the terminal to permit a soft start. Output can be turned on and off by using
the soft start terminals. Set the soft start terminal voltage to VSSL (0.15V) or less to stop the output. To switch the potential at the soft start terminals,
drive the open collector of the transistor. Since the discharge currents from C4 and C5 flow 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 to the terminal.
STA800M
STA800M
3 or 8 S.S.
+
C4, C5
3 or 8 S.S.
+
C4, C5
Soft start
Soft start +VO ON/OFF
112
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet STA801M.PDF ] | |
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