MC44603AP Enhanced Mixed Frequency Mode GreenLine TM PWM Controller
electronic integrated circuit
,linear integrated circuits
MC44603AP
Enhanced Mixed Frequency Mode GreenLine TM PWM Controller:Fixed Frequency, Variable Frequency,Standby Mode
• 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
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 |
|
Demagnetization Detection Input Current Sink |
Idemag–ib (Source) Idemag–ib (Sink) |
–4.0 10 |
V 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°C Thermal Resistance, Junction–to–Air DW Suffix, Surface Mount, Case 751G Maximum Power Dissipation at TA = 85°C Thermal Resistance, Junction–to–Air |
|
0.6 |
|
| Operating Junction Temperature | TJ | 150 | °C |
| Operating Ambient Temperature | TA | –25 to +85 | °C |
NOTES: : 1. Maximum package power dissipation limits must be observed.
2. ESD data available upon request.
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