TPS40007DGQG4

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TPS40007DGQG4 is a DC-DC controller integrated chip with wide application field. It adopts constant frequency, skip or burst mode, current mode and phase shift modulation (PSM) control, which contains a frequency generation block, internal synchronous rectification, arch soft start and excellent programmable slope soft start. Besides, it operates with wide input voltage, excellent transient response and ability of low startup/operating current. In addition, as a versatile controller, it is easy to use, easily drive a variety of external switches in various applications.

The output voltage of the TPS40007DGQG4 can be fully regulated by controlling the duty cycle of the switch (DRV) within the featured range of 10.8V to 25V. It has excellent transient response and fully adjustable switching frequency with externally adjustable deadtime, duty cycle and synchronization. In other words, this adaptable controller can satisfy various applications with a wide range of settings and external components. Moreover, it has an integrated edge-aware protect circuit and full analog/integrated interface, as well as an external programmable slope soft start, which allows for an extremely fast and accurate turn-on of the DRV.

The working principle of TPS40007DGQG4 mainly relies on the switching action of the external DRV. When the DRV is switched, a signal with a duty ratio of ≈50% is generated across the DRV, which is determined by the external oscillator frequency and duty cycle setting. Then the duty cycle of the DRV will affect the output voltage, which can be adjusted from 10.8V to 25V. The output voltage of the controller is expressed as a control loop. The output voltage of the TPS10007DGQG4 is regulated by a feedback loop with a reference voltage, an adjustable voltage regulator and a feedback error amplifier. When the output voltage is lower than the reference voltage, the phase shift modulation (PSM) will act as an on/off controller to increase the switch driving signal, thus increasing the output voltage. On the other hand, if the output voltage is higher than the reference voltage, the PSM will reduce the switch driving signal, so as to decrease the output voltage.

In conclusion, the TPS40007DGQG4 is a versatile DC-DC controller, which can be applied in different fields with its feature of wide input voltage, excellent transient response, low startup/operating current and easy-to-use. It is powered by an external DRV, and with the optimized control loop, it can ensure stable and accurate output voltage. Due to these features, TPS40007DGQG4 is an ideal choice for power system applications.

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