UCC3808AD-1

Duty Cycle:	49%
Base Part Number:	UCC3808A-1
Mounting Type:	Surface Mount
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-55°C ~ 150°C (TJ)
Control Features:	Frequency Control
Fault Protection:	--
Frequency - Switching:	1MHz
Series:	--
Voltage - Supply (Vcc/Vdd):	8.3 V ~ 15 V
Voltage - Start Up:	12.5V
Topology:	Boost, Buck, Half-Bridge, Push-Pull
Voltage - Breakdown:	--
Internal Switch(s):	--
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tube

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Introduction

The UCC3808A is an integrated power management circuit designed for controlling multiple voltages in cost-sensitive applications such as portable electronics, consumer and automotive applications. UCC3808A is a current-mode, fixed frequency oscillator, with internal oscillators, diodes, fast-coupled FETs, overvoltage and undervoltage protection, and dead time optimization. It includes a more stable frequency controlled oscillation scheme and multiple pulse width modulation (PWM) outputs to drive either low-side N-channel MOSFETs, or high-side P-channel MOSFETs.

Working Principle

The working principle of the UCC3808A is based on its internal frequency-controlled oscillator, which produces a frequency controlled pulse width modulation (PWM) signal. The PWM signal generated by the UCC3808A can be used to drive various switching topologies such as half-bridge or full-bridge between two power buses. The UCC3808A can be used to synchronize the oscillation frequency with an external signal, either through a spread spectrum technique or a precise frequency locked loop. Furthermore, the UCC3808A has a pulse-width-modulated signal, allowing the control of a switching frequency up to 350 kHz, which is adjustable with external components.

Application Field

The UCC3808A is often used to regulate and control multiple output voltages in cost-sensitive applications such as consumer and automotive electronics. For example, it can be used in automotive applications to power and control a car\'s on-board electronics such as radio, headlights, and windshield wipers. The UCC3808A can also be used in consumer electronic devices such as portable media players, digital cameras, and cell phones. It allows the device to keep multiple voltages constant, even when the power source changes. The UCC3808A can also be used in portable medical devices such as blood glucose meters, blood pressure monitors and pulse oximeters.The UCC3808A is extremely useful for cost-sensitive applications because it combines the cost savings of a single IC solution with the improved performance of current-mode, fixed frequency oscillators. The UCC3808A also reduces EMI/RFI by ensuring a clean shutdown and by actively controlling power dissipation. Its high PWM frequency allows it to achieve small solution size and low no-load power consumption. Furthermore, the UCC3808A\'s control logic has a number of features that can improve system reliability, such as under-voltage protection, over-voltage protection, dead time optimization, and external synchronization.

Conclusion

The UCC3808A is an integrated power management circuit designed for controlling multiple voltages in cost-sensitive applications such as consumer and automotive electronics. It is based on a current-mode, fixed frequency oscillator and includes a more stable frequency controlled oscillator, diodes, fast-coupled FETs, overvoltage and undervoltage protection, and dead time optimization. The UCC3808A allows the device to keep multiple voltages constant, even when the power source changes. It also allows the device to achieve small solution size, low no-load power consumption, and improved system reliability. It is an ideal solution for cost-sensitive applications.

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