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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...

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SeekIC No. : 004422093 Detail

ML4818_1245300: Features: • Full bridge phase modulation zero voltage switching circuit with programmable ZV transition times• Constant frequency operation to 500kHz• Current mode operation•...

ML4818_1245300 Data Sheet

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Part Number:
ML4818_1245300
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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


Pinout

Connection Diagram


Specifications

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



Description

The ML4818_1245300 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 ML4818_1245300 modulates the phases of the two sides of the bridge to control output power.

The ML4818_1245300 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 of ML4818_1245300  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.




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