The car we use is developing towards green energy saving, networked, intelligent, and the calculation capacity of car electronic devices is getting higher and higher. As the screen display effect of the man-machine interface, the content is getting better and better. Because the future of the future, the various resources are gathering in this field, and the market value of some of the new power of the car is far from the traditional car enterprise. It seems that it seems to be very fast, I think it is still a little expectation. I am looking forward to the car who is still useful, and I will replace it when I meet my ideal car.
The higher the capacity of the car electronic device, the more internal resources, the power consumption will increase significantly, which is actually a challenge for power management. The CPU created by the advanced process can work at a lower voltage, but due to the increase in internal resources and the increase in the speed of operation, the current required to consume is substantially increased, plus the internal resources of these complex devices are not total It is in a steady working state, and they are started between the on-demand stops, and the transient impact is applied to the power supply, and the power supply is difficult to stabilize its output, so the power supply device is required to be more loaded. Ability, higher adjustment accuracy, there is a lower ripple index and faster strain ability, and also have higher reliability, tolerate the test of various harsh environments, can be smooth through strict Car certification.
RTQ2134-QA is a power management device authenticated by AEC-Q100 Grade 1, which includes 4-way synchronous Buck converters that can merge output or separate output, each of which has 5.5A's current output capability, only It is necessary to write a specific data in the one-time writable memory in which it can be written to 2 + 2 or 2 + 1 + 1, and two of the 10A + 10A or 10A + 5A + 5A can be provided, respectively. Group or three sets of outputs, while each set of outputs can be dynamically adjusted by the I2C interface to meet the needs of the various operating modes.
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When the two ways of Buck merge, the combined ports are the most reasonable arrangements with different phases, which minimizes input, output ripple, optimizing the performance of the entire system, this is RTQ2134 -QA multi-phase mode operation mode, the following figure is a waveform diagram of Buck1 and Buck4 presentation in its specification, and in the case where the load current is 11A, the peak value of the output ripple is only a few MV.
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Today's high-performance processors are typically composed of multiple cores. When entering the working state, at other times, it is standby, such a into the power converter is a substantial hopping of the power converter, and it will cause the drop or bulge of its output voltage, and the converter must be extremely fast. The speed responds to this so that the output voltage quickly pulled back to the original steady state, and the RTQ2134-QA resolves this problem is to use AcotTM (Advanced Constant-on-Time) Control Architecture. It can quickly turn on the conduction period when it finds that the feedback voltage is lower than the reference voltage, and the energy supplement to the output is found, the maximum delay is only 100 ns. After the fixed conduction time, if the output voltage has not been recovered, it will enter the on-the-time period after up to 100 ns, so that the output voltage can be corrected to the preset state with the fastest speed.
The above figure shows that RTQ2134-QA faces the sudden increase in the load of the load at two-phase or single-phase operation, which is obvious to be more powerful when the output voltage repair capability at the two-phase operation is more.
For the sudden decrease in the load, the response of the BUCK converter is to end the on-line operation of the upper bridge switch as soon as possible, and the RTQ2134-QA can immediately enter this state because of the ACOT® control architecture, but temporarily lose the inductance energy storage capacity of the original This part of the energy needs to be naturally returned to a steady state after the transfer of the output voltage is transferred to the output capacitor.
The purpose of combining more than two BUCK converters into multi-phase operation is to increase load capacity, reduce the burden on the components used in a single converter and make overall performance better, but the operation of each converter causes a certain loss. In order to balance such contradictions, RTQ2134-QA adds an automatic phase-in-phase operation in the two-phase converter operating in a combined manner, which can automatically enter the two-phase operating mode when the load is greater than a certain level (3A), and can Automatically switch back-to-order operation mode when the load is reduced to a certain level (2.6a), and the unnecessary consumption is automatically dropped, thus having low consumption, high supply capabilities. In order to further reduce loss, RTQ2134-QA also has user-selectable light load energy-saving mode. This is a current discontinuous operation mode, which naturally brings out the result of output ripples, if this is unacceptable, user It can be set to force current continuous mode when needed, and the output voltage adjustment accuracy can be obtained.
For applications that need to change the operating voltage in operation, RTQ2134-QA supports dynamic adjustment of its output voltage in the range of 0.3V to 1.85V with its I2C interface with a clock speed of 3.4 MHz, and can also pass an external input The signal is selected for the output voltage data set in the two registers to achieve fast output voltage switching, and the output voltage varies from one level to another horizontal speed to be set by the user.
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As a vehicle power management chip, RTQ2134-QA uses a WET-WQFN-30L 4.5x4 (Fc) package that is convenient for optoelectronic welding state, where the FC indicates that the intraday use of the grain flush structure, has Very good power dissipation ability. The pin arrangement is the result of FMEA, the failure mode and its influence analysis, can prevent the adverse effects of adjacent lead short circuits, external circuit failures, etc., can avoid serious accidents such as combustion.
RTQ2134-QA design also includes many fault prevention measures such as overcurrent protection, undervoltage protection, timeout protection, soft start and overheating protection, etc., can issue a notification to the control system in a variety of faults. To facilitate its processing, the data that is temporarily stored in the register allows its query failure to make the problem processing process more direct and more convenient.
The input voltage range of RTQ2134-QA is 3V to 6V. When the vehicle system can use the high voltage Buck device, which we introduce the RTQ2965-QA as the voltage pre-regulator, the high pressure from the vehicle battery bus, the result is It can bring best performance and cost effectiveness, which makes these different devices can have their own, and make the greatest contribution to human happiness.
The above is reproduced from Richtektechnology.
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