ICE3BR0665JXKLA1

Duty Cycle:	75%
Base Part Number:	ICE3BR0665
Mounting Type:	Through Hole
Supplier Device Package:	PG-DIP-8
Package / Case:	8-DIP (0.300", 7.62mm)
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	--
Fault Protection:	Current Limiting, Open Loop, Over Load, Over Temperature, Over Voltage
Power (Watts):	74W
Frequency - Switching:	65kHz
Series:	CoolMOS™, CoolSET™F3R
Voltage - Supply (Vcc/Vdd):	10.5 V ~ 25 V
Voltage - Start Up:	18V
Topology:	Flyback
Voltage - Breakdown:	650V
Internal Switch(s):	Yes
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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ICE3BR0665JXKLA1 is a low-cost, wide input range, high efficiency, off-line switcher integrated circuit (IC).It is used in applications such as low cost desktop PC power supplies, adapters and multiport adapters, as well as other kinds of general purpose off-line power supplies. With advanced 00 kHz minimum device switching frequency and 1.4 1.4 kHz maximum transition frequency, it can support frequency range up to 400 kHz.

ICE3BR0665JXKLA1\'s application field includes low power applications where high efficiency is important, such as adaptors, laptops, mobile phones, PDAs, digital cameras, and other portable electronic equipment. It is also widely used in household and commercial applications, such as compact fluorescent lamps, monitors, printers, and so on. In all these cases, this device is ideal to achieve the very highest levels of efficiency while providing a very reliable and cost-effective solution.

Working Principle

The main working principle of ICE3BR0665JXKLA1 is resonant operation based on a power stage implemented with two P-MOS transistors and two N-MOS transistors. The device uses a fraction of the load current to flow through an opto-coupler LED to control an auxiliary circuit. A fast turn-on P-MOS transistor supplies the energy taken from a power source to the power stage for starting the switching process. When the P-MOS transistor is switched off, the negative voltage generated by the inductor induces a current flow from the power source through the opto-coupler LED. When the first N-MOS transistor starts to conduct, the voltage of the secondary side of the transformer decreases. This voltage decrease reduces the current flow through the opto-coupler LED and, as a result, the LED current decrease is detected by the integrated circuit. Then the integrated circuit turns off the main N-MOS transistor through its gate terminal, so the power stage of the device is ready to start another switching cycle. During the rest of the cycle, the average current flowing through the main N-MOS transistor can be adjusted by changing the duty cycle (expressed as a percentage) of the controller with respect to the reference frequency.

When the IC is powered off, the integrated circuit\'s output pin is blocked and its current consumption is zero. The IC can be easily reset in order to restart the switching process in a different phase. In addition, the IC can directly control the output voltage of the power supply independently of the input voltage, making the power supply structure much more compact.

Conclusion

In conclusion, ICE3BR0665JXKLA1 is a low-cost, wide input range, high efficiency, off-line switcher integrated circuit which is suitable for use in a variety of applications. Its working principle is based on resonant operation and a power stage implementation with two P-MOS transistors and two N-MOS transistors. The IC can directly control the output voltage of the power supply independently of the input voltage. The device is ideal for applications where high efficiency is important, such as adaptors, laptops, mobile phones, PDAs, digital cameras, and other portable electronic equipment.

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