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Verfügbare Sprachen
Verfügbare Sprachen
Oscillator chopping wave output
Erroramplifieroutput
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Dead time input
Protection enable
1
terminal waveform
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1 Dead time 100%
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Output transistor
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collector waveform
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Lock-out cancel
3.6V
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~ OV
PROTECTION ENABLE TIME, tpe = 0.051 x 10.Cp, [SEC]
Figure 4-2. TL1451 Timing Chart
', 5V regulator circuit
The parts used as a switching regulator circuit are the switching transistor Q920 (2SB956), diode D920
(SFPB64), smoothing coil. L930.(100LH), and capacitor C950 (120UF, 6.3V). The pulse width of Q920 output
of the circuit is fluctuated by IC901, thus controlling the voltage. Q921 (FMY 1) is for driving Q920.
The 5V output is suppplied to the VCR circuit (V/F circuit) and camera circuit, switched by Q960 (25D1757) to
the camera circuit.
. 9V regulator circuit (17V, 11.5V, and. -— 13V output)
The multi-pulse transformer T901 is switched by Q940 (28A1213), and it outputs 17V, 11.5V,9V,.and — 13V.
The 9V output is fed back to 1C901, fluctuating the pulse width of Q940 output. and controlling the voltage.
Q941 is for driving Q940. D921, D914, D940, D923, C945, C930, C943, and C948 are for rectification of each
output. The 9V output is supplied to the VCR circuit and camera circuit, switched by Q933 (28A1577) to the
camera circuit. Also the 17V and - 13V outputs are switched by Q931 and Q930.
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