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PDF TDA4601 Data sheet ( Hoja de datos )
| Número de pieza | TDA4601 | |
| Descripción | Control ICs for Switched-Mode Power Supplies | |
| Fabricantes | Siemens Semiconductor | |
| Logotipo |  |
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Control ICs for Switched-Mode Power Supplies
TDA 4601
Bipolar IC
Features
q Direct control of the switching transistor
q Low start-up current
q Reversing linear overload characteristic
q Base current drive proportional to collector current
q Protective circuit in case of disturbance
P-SIP-9-1
Type
TDA 4601
Ordering Code
Q67000-A2379
Package
P-SIP-9-1
The integrated circuit TDA 4601/D is designed for driving, controlling and protecting the switching
transistor in self-oscillating flyback converter power supplies as well as for protecting the overall
power supply unit. In case of disturbance, the rise of the secondary voltage is prevented. In addition
to the ICs application range including TV-receivers video tape recorders, hifi devices and active
loudspeakers, it can also be used in power supply units for professional applications due to its wide
control range and high voltage stability during increased load changes.
Semiconductor Group
7
06.94
1 page  
TDA 4601
In case of continuing problems of disturbance (V5 ≤ V1/2 – 0.1 V) the switch-on mode is interrupted
by the periodic protective operating mode described above, i.e. pin 8 is inhibited and V9 is falling,
etc.
Switch-On in the Wide Range Power Supply (90 Vac to 270 Vac)
(application circuit 2)
Self-oscillating flyback-converters designed as wide range power supplies require a power source
independent of the rectified line voltage for TDA 4601. Therefore the winding polarity of winding
11/13 corresponds to the secondary side of the flyback converter transformer. Start-up is not as
smooth as with an immediately available supply voltage, because TDA 4601 has to be supplied by
the start-up circuit until the entire secondary load has been charged. This leads to long switch-on
times, especially if low line voltages are applied.
However, the switch-on time can be shortened by applying the special start-up circuit (dotted line).
The uncontrolled phase of feedback control winding 15/9 is used for activating purposes.
Subsequent to activation, the transistor T1 begins to block when winding 11/13 generates the
current supply for TDA 4601. Therefore, the control circuit cannot be influenced during operation.
Semiconductor Group
11
5 Page 
TDA 4601
Test and Measurement Circuit 1
Test Diagram: Overload Operation
Semiconductor Group
17
11 Page | ||
| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet TDA4601.PDF ] | |
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