MFG:MOTOROLA Package Cooled:DIP16 D/C:1000
MFG: MOTOROLA
Package Cooled: DIP16
D/C: 1000
Description: The MC44603 is an enhanced high performance controller that is specifically designed for offline and d...
The MC44603 is an enhanced high performance controller that is specifically designed for offline and dctodc converter applications. This device has the unique ability of automatically changing operating modes if the converter output is overloaded, unloaded, or shorted, offering the designer additional protection for increased system reliability. The MC44603 has several distinguishing features when compared to conventional SMPS controllers. These features consist of a foldback facility for overload protection, a standby mode when the converter output is slightly loaded, a demagnetization detection for reduced switching stresses on transistor and diodes, and a high current totem pole output ideally suited for driving a power MOSFET. It can also be used for driving a bipolar transistor in low power converters (< 150 W). It is optimized to operate in discontinuous mode but can also operate in continuous mode. Its advanced design allows use in current mode or voltage mode control applications.
|
Rating |
Symbol |
Value |
Unit |
| Total Power Supply and Zener Current |
(ICC + IZ) |
30 |
mA |
| Supply Voltage with Respect to Ground (Pin 4) |
VC VCC |
18 |
V |
| Output Current (Note 1) Source Sink |
IO(Source) IO(Sink) |
-750 750 |
mA |
| Output Energy (Capacitive Load per Cycle) |
W |
5.0 |
J |
| RF Stby, CT, SoftStart, Rref, RP Stby Inputs |
Vin |
0.3 to 5.5 |
V |
| Foldback Input, Current Sense Input, E/A Output, Voltage Feedback Input Overvoltage Protection, Synchronization Input |
Vin |
0.3 to VCC + 0.3 |
V |
| Synchronization Input High State Voltage Low State Reverse Current |
VIH VIL |
VCC + 0.3 20 |
V mA |
| Demagnetization Detection Input Current Source Sink |
Idemagib (Source) Idemagib (Sink) |
4.0 10 |
mA |
| Error Amplifier Output Sink Current |
IE/A (Sink) |
20 |
mA |
| Power Dissipation and Thermal Characteristics P Suffix, DualInLine, Case 648 Maximum Power Dissipation at TA = 85 Thermal Resistance, JunctiontoAir DW Suffix, Surface Mount, Case 751G Maximum Power Dissipation at TA = 85 Thermal Resistance, JunctiontoAir |
PD RJA PD RJA |
0.6 100 0.45 145 |
W /W W /W |
| Operating Junction Temperature |
TJ |
150 |
|
| Operating Ambient Temperature |
TA |
25 to +85 |
|
MC44603
PDF/DataSheet Download
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