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PDF MS1003SH Data sheet ( Hoja de datos )

Número de pieza MS1003SH
Descripción Control IC
Fabricantes SHINDENGEN 
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No Preview Available ! MS1003SH Hoja de datos, Descripción, Manual

MS1003SHMS1004SH
Application Note Ver.2.2
The product and product specifications are subject to change without notice.
1/41
SHINDENGEN ELECTRIC MFG. CO. , LTD

1 page




MS1003SH pdf
1.5 Basic circuit configuration
(1) Circuit without super standby function
MS1003SHMS1004SH
Application Note Ver.2.2
(2) Circuit with super standby function
5/41
SHINDENGEN ELECTRIC MFG. CO. , LTD

5 Page





MS1003SH arduino
3.2.5 Output voltage control
The MS1003SH and MS1004SH control the output
voltage with the ON range proportional to the voltage at
the F/B pin.
The output voltage is controlled linearly so that the ON
range is at its minimum when the F/B pin voltage is 1.5
V and at its maximum when the voltage is 4.5 V. The
IF/B current flows from the F/B pin. The impedance of
the photocoupler transistor externally connected between
the F/B pin and the GND pin is varied by a control signal
from the secondary output detection circuit, thereby
controlling the ON range of the main switching device to
produce a constant voltage.
F/B pin
The latch count start voltage (VF/B (latch count))
is set up for the F/B pin. When the voltage exceeds
the set level, the timer begins counting. After
maintaining this state for approximately 2 s (latch
count), the IC is latched.
ton
(max)
MS1003SHMS1004SH
Application Note Ver.2.2
Controlling output
voltage with
photocoupler
Output voltage error
detection feedback
signal
3.3 Burst mode oscillation
0 1.5
4.5 VF/B(latch count)
フィFeedback voltage
VF/BV
3.3.1 AutoStby function
The MS1003SH and MS1004SH switch between normal mode and burst mode automatically. This enables
low standby power consumption with no other components required for standby mode.
1) Switching from normal mode to burst mode
The IC switches from normal mode to burst mode when the load becomes lighter and the OCL pin
detects a drain current at the VOCL (stby) = 45 mV (TYP) or less for longer than Tstby = 250 ms (TYP).
VOCL (stby) =
45 mV or less
The IC enters standby mode when the
drain current stays at the burst
switching current or below for longer
than Tstby = 250 ms.
Operating
mode
Normal
Burst
11/41
SHINDENGEN ELECTRIC MFG. CO. , LTD

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