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Part Number: ML4818_1245300
Description: The ML4818 is a complete phase modulation control IC suit-able for full bridge soft switching converte...
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ML4818_1245300
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DataSheet
General Description
ML4818_1245300 General Description
The ML4818 is a complete phase modulation control IC suit-able for full bridge soft switching converters. Unlike conven-tional PWM circuits, the phase modulation technique allows for zero-voltage switching transitions and square wave drive across the transformer. The IC modulates the phases of the two sides of the bridge to control output power.
The ML4818 can be operated in current mode. The delay times for the outputs are externally programmable to allow the zero-voltage switching transitions to take place.
Pulse-by-pulse current limit, integrating fault detection, and soft start reset are provided. The under-voltage lockout cir-cuit features a 6V hysteresis with a low starting current to allow off-line start up with a low power bleed resistor. A shutdown function powers down the IC, putting it into a low quiescent state.
ML4818_1245300 Maximum Ratings
Absolute Maximum Ratings are those values, beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
| Parameter | Min. | Max. | Units |
| VCC | 30 | V | |
| Output Driver Current, Source or Sink DC Pulse (0.5 µs) |
0.5 1.5 |
A A | |
| Analog Inputs (CT, RAMP, ILIM, E/A OUT, INV, SOFT START, RCRESET) |
0.3 | 6 | V |
| CLOCK Output Current (RT) | -5 | mA | |
| Error Amplifier Output Current (E/A OUT) | 5 | mA | |
| SOFT START Sink Current | 50 | mA | |
| Oscillator Charging Current (CT) | -5 | mA | |
| Junction Temperature | 150 | ||
| Storage Temperature Range | 65 | 150 | |
| Lead Temperature (Soldering 10 Sec) | 260 | ||
| Thermal Resistance (JA) Plastic Power DIP |
40 | /W |
ML4818_1245300 Features
• Full bridge phase modulation zero voltage switching circuit with programmable ZV transition times
• Constant frequency operation to 500kHz
• Current mode operation
• Cycle-by-cycle current limiting with integrating fault detection and restart delay
• Precision buffered 5V reference (+1%)
• Four 1.5A peak current totem-pole output drivers
• Under-voltage lockout circuit with 6V hysteresis
• Power DIP package
• Constant frequency operation to 500kHz
• Current mode operation
• Cycle-by-cycle current limiting with integrating fault detection and restart delay
• Precision buffered 5V reference (+1%)
• Four 1.5A peak current totem-pole output drivers
• Under-voltage lockout circuit with 6V hysteresis
• Power DIP package
ML4818_1245300 Connection Diagram
ML40123N
PDF/DataSheet Download
- Datasheet: ML40123N
- File Size: 108913 KB
- Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]
- Click here to Download
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