MC34060ADR2G

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MC34060ADR2G are advanced switching controllers, widely applied in power control applications such as buck, boost, or PFM/PWM converters. It is capable of providing about 1A of output current, with very high accuracy. The device also provides up to four protection features, such as over-voltage protection, under-voltage protection, current limiting protection, and thermal protection.

Applications

MC34060ADR2G is designed for applications that require high performance and are subject to tight tolerances and low ripple, for instance, in SMPS, battery charging, lighting and automotive applications.

One application is in switch-mode power supplies, where the MC34060ADR2G provides control and protection. The controller can realize coverters’ higher efficiency while providing low ripple output voltage and accurate regulation.

In automotive systems, the device is used for on-board dc-dc conversion, as in transfer from battery to system control electronics. The device also helps in extending battery life by efficiently extracting the most required power from the battery and maintaining the correct power levels for the system.

Features

• High efficiency power switch with integral MOSFET
• High precision current limit circuitry
• Wide input voltage operating range
• Low output ripple voltage
• Integrated Over-Voltage Protection (OVP) circuitry
• Fixed and adjustable output voltage options
• On-board oscillator
• Output voltage tracking
• Pulse Width Modulation (PWM) or Pulse Frequency Modulation (PFM) modes

Working Principle

The device contains both a switching power supply and a linear regulator. The switch-mode power supply (SMPS) is a type of power supply that is designed to provide clean, regulated power to an electronic circuit or device. It typically uses inductors and capacitors to create a switching converter that can efficiently convert an alternating current (AC) input voltage to a direct current (DC) output voltage. The linear regulator is used to ensure that the output voltage remains within a predetermined range even when the load (drawing power) is changed.

The MC34060ADR2G includes a feedback loop and an error amplifier, which senses the output voltage and makes this voltage equal to reference voltage. It also has a slew rate control feature which can be used to select the speed of voltage change. The device also has a power switch which is used to turn on and turn off the power.

The MC34060ADR2G can operate in either PWM mode or PFM mode. In PWM mode, the input voltage is continuously chopped in a fixed frequency and all the time, the output is kept almost constant. In PFM mode, the input voltage is chopped only when the load is high, thus maintaining the output voltage within a fixed range.

The main components of the device are the regulator, the driver and the oscillator, which are all connected in a loop and work together to maintain a stable output voltage. The oscillator is responsible for generating the chopping frequency for the switch, the driver is responsible for driving the switch on and off, and the regulator is responsible for sensing the output voltage and making adjustments so that the output voltage remains within a certain range.

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