MC44602, MC44602 T, MC44603A Selling Leads, Datasheet
MFG:MOT Package Cooled:DIP D/C:99
MC44602, MC44602 T, MC44603A Datasheet download
Part Number: MC44602
MFG: MOT
Package Cooled: DIP
D/C: 99
MC44602, MC44602 T, MC44603A
- Table of contents:
Info of MC44602
Info of MC44602 T
Info of MC44603A
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About MC44602
PDF/DataSheet Download
Datasheet: MC44602
File Size: 256229 KB
Manufacturer: ONSEMI [ON Semiconductor]
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About MC400
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Datasheet: MC400
File Size: 95174 KB
Manufacturer: ETC [ETC]
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About MC44603A
PDF/DataSheet Download
Datasheet: MC44603A
File Size: 415475 KB
Manufacturer: ONSEMI [ON Semiconductor]
Download : Click here to Download
MC44602 General Description
The MC44602 is an enhanced high performance fixed frequency current mode controller that is specifically designed for off–line and high voltage dc–to–dc converter applications. This device has the unique ability of changing operating modes if the converter output is overloaded or shorted, offering the designer additional protection for increased system reliability. The MC44602 has several distinguishing features when compared to conventional current mode controllers. These features consist of a foldback amplifier for overload detection, valid load and demag comparators with a fault latch for short circuit detection, thermal shutdown, and separate high current source and sink outputs that are ideally suited for driving a high voltage bipolar power transistor, such as the MJE18002, MJE18004, or MJE18006.
Standard features include an oscillator with a sync input, a temperature compensated reference, high gain error amplifier, and a current sensing comparator. Protective features consist of input and reference undervoltage lockouts each with hysteresis, cycle–by–cycle current limiting, a latch for single pulse metering, and a flip–flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%. This device is manufactured in a 16 pin dual–in–line heat tab package for improved thermal conduction.
MC44602 Maximum Ratings
|
Rating |
Symbol |
Value |
Unit |
| Total Power Supply and Zener Current |
(ICC + IZ) |
30 |
mA |
| Sink Ground Voltage with Respect to Gnd (Pin 9) |
VSink(neg) |
–5.0 |
V |
| Output Supply Voltage with Respect to Sink Gnd (Pins 4, 5, 12, 13) |
VC |
20 |
V |
| Output Current (Note 1) Source Sink |
IO(Source) IO(Sink) |
1.0 1.5 |
A |
| Output Energy (Capacitive Load per Cycle) |
W |
5.0 |
μJ |
| Current Sense and Voltage Feedback Inputs |
Vin |
–0.3 to 5.5 |
V |
| Sync Input High State Voltage Low State Reverse Current |
VIH IIL |
5.5 –20 |
V mA |
| Load Detect Input Current |
Iin |
–20 to +10 |
mA |
| Error Amplifier Output Sink Current |
IEA (Sink) |
10 |
mA |
| Power Dissipation and Thermal Characteristics Maximum Power Dissipation at TA = 25℃ Thermal Resistance, Junction–to–Air Thermal Resistance, Junction–to–Case |
PD RθJA RθJC |
2.5 80 15 |
W ℃/W ℃/W |
| Operating Junction Temperature |
TJ |
150 |
℃ |
| Operating Ambient Temperature |
TA |
–25 to +85 |
℃ |
MC44602 Features
• Separate High Current Source and Sink Outputs Ideally Suited for Driving Bipolar Power Transistors: 1.0 A
Source, 1.5 A Sink
• Unique Overload and Short Circuit Protection
• Thermal Protection
• Oscillator with Sync Input
• Current Mode Operation to 500 kHz Output Switching Frequency
• Output Deadtime Adjustable from 50% to 70%
• Automatic Feed Forward Compensation
• Latching PWM for Cycle–By–Cycle Current Limiting
• Input and Reference Undervoltage Lockouts with Hysteresis
• Low Startup and Operating Current
MC44602 Connection Diagram
MC44603A General Description
The MC44603A is an enhanced high performance controller that is specifically designed for off–line and dc–to–dc 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 MC44603A 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.
MC44603A Maximum Ratings
|
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 |
μJ |
| RF Stby, CT, Soft–Start, 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 |
Idemag–ib (Source) Idemag–ib (Sink) |
–4.0 10 |
mA |
| Error Amplifier Output Sink Current |
IE/A (Sink) |
20 |
mA |
| Power Dissipation and Thermal Characteristics P Suffix, Dual–In–Line, Case 648 Maximum Power Dissipation at TA = 85℃ Thermal Resistance, Junction–to–Air DW Suffix, Surface Mount, Case 751G Maximum Power Dissipation at TA = 85℃ Thermal Resistance, Junction–to–Air |
PD RθJA PD RθJA |
0.6 100 0.45 145 |
W ℃/W W ℃/W |
| Operating Junction Temperature |
TJ |
150 |
℃ |
| Operating Ambient Temperature |
TA |
–25 to +85 |
℃ |
2. ESD data available upon request.
MC44603A Features
Current or Voltage Mode Controller
• Operation up to 250 kHz Output Switching Frequency
• Inherent Feed Forward Compensation
• Latching PWM for Cycle–by–Cycle Current Limiting
• Oscillator with Precise Frequency Control
High Flexibility
• Externally Programmable Reference Current
• Secondary or Primary Sensing
• Synchronization Facility
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
Safety/Protection Features
• Overvoltage Protection Against Open Current and Open Voltage Loop
• Protection Against Short Circuit on Oscillator Pin
• Fully Programmable Foldback
• Soft–Start Feature
• Accurate Maximum Duty Cycle Setting
• Demagnetization (Zero Current Detection) Protection
• Internally Trimmed Reference
• Enhanced Output Drive
GreenLine Controller: Low Power Consumption in Standby Mode
• Low Startup and Operating Current
• Fully Programmable Standby Mode
• Controlled Frequency Reduction in Standby Mode
• Low dV/dT for Low EMI Radiations
• Operation up to 250 kHz Output Switching Frequency
• Inherent Feed Forward Compensation
• Latching PWM for Cycle–by–Cycle Current Limiting
• Oscillator with Precise Frequency Control
High Flexibility
• Externally Programmable Reference Current
• Secondary or Primary Sensing
• Synchronization Facility
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
Safety/Protection Features
• Overvoltage Protection Against Open Current and Open Voltage Loop
• Protection Against Short Circuit on Oscillator Pin
• Fully Programmable Foldback
• Soft–Start Feature
• Accurate Maximum Duty Cycle Setting
• Demagnetization (Zero Current Detection) Protection
• Internally Trimmed Reference
• Enhanced Output Drive
GreenLine Controller: Low Power Consumption in Standby Mode
• Low Startup and Operating Current
• Fully Programmable Standby Mode
• Controlled Frequency Reduction in Standby Mode
• Low dV/dT for Low EMI Radiations
MC44603A Connection Diagram
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