ADP1871ACPZ-1.0-R7

DC-DC converters are broadly used in portable applications and power systems. To increase the efficiency of the switch-mode power supply, the control circuit is commonly used in the power supply design. The ADP1871ACPZ-1.0-R7 is designed as the switch-mode energy converter controller and offers a high-performance, integrated solution for intermediate bus, single and multiple output switch-mode power supplies.

Application Field

ADP1871ACPZ-1.0-R7 is designed to be integrated into an energy conversion system, providing a high-performance, low-cost solution for intermediate bus and multiple output conversions. Its electrical specifications make it ideal for use in a variety of operations, such as SMPS, power factor correction, DC/DC converters, isolation amplifiers, and multiple output switch-mode power supplies.

It can also be used in a variety of systems, such as portable electronics, computer peripherals, instrumentation, automotive electronics, and industrial equipment. For example, it can be used in portable DVD players, digital cameras, PDAs, PCs, digital audio players, mobile phones, MP3 players, digital TVs, and DVD players. Furthermore, the ADP1871ACPZ-1.0-R7 can also be used in automotive applications such as phone charging, power windows circuit, power seat adjusters, and electric pumps for fuel injection.

Working Principle

The ADP1871ACPZ-1.0-R7 is based on an adjustable boost/buck converter. It contains a proprietary, sensitized, charge-pump current-mode regulator operating in either PFM or PWM mode. It is suitable for motors, LED backlight, or LCD bias, or remote voltage sensing.

The ADP1871ACPZ-1.0-R7 incorporates an integrated operational amplifier (Op-Amp) that provides gain control and compensates for the amplifier input offsets. It also contains a mutiplexer-based pulse-width modulation (PWM) generator providing frequency and duty-cycle control. The integrated current-mode controller provides low-side, high-side and synchronous rectifiers with current-sense feedback regulation. The high-side gate driver contains a fast-discharge circuit for improved efficiency. In addition, the device includes an integrated low-dropout linear regulator with low-bias current for improved noise and transient response.

The ADP1871ACPZ-1.0-R7 also contains embedded protections, including an over-voltage protection and under-voltage protection. This helps to protect against voltage transients and/or overshoot. When an over-current condition is detected, the controller is disabled and an interrupt signal is sent to the system\'s microcontroller.

The ADP1871ACPZ-1.0-R7 can be used in conjunction with a wide range of power MOSFETs, including high-voltage and low-side MOSFETs. The adjustable output voltage, supported by a low-side current sensing, simplifies regulation of the output voltage and current waveforms.

Conclusion

The ADP1871ACPZ-1.0-R7 is an integrated energy converter controller designed for area-limited, intermediate bus and single/multiple output applications. It is designed to provide superior performance, high efficiency, and low-noise operation. Its wide application scope, advanced features, and embedded protections make it an ideal choice for various portable and automotive applications.