NCP6922CBMTTXG

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The NCV6922CBMTTXG is a Voltage Regulator, specifically classified as a Linear + Switching Regulator, which is a subset of the wider PMIC (Power Management IC) family. Designed to offer excellent line regulation, load regulation and component continuity, this device is suitable for a variety of applications which require an accurate and stable output voltage. The integrated combination of high-side and low-side MOSFETs and an output voltage adjustable with an external voltage divider provides a cost-effective solution for applications where an internally fixed output voltage is not suitable.

Features

• Input voltage: up to 40V
• Output voltage: up to 15V
• Programmable output current limit: 0.7A to 3A with 500 mV to 700 mV sense voltage
• Dropout voltage: 150 mV (typ.) at 1A/4A load
• Soft-start enabled
• Under-voltage lockout with hysteresis
• Hiccup-mode output current limitation
• Thermal shutdown
• Short-circuit protection

Applications

The NCV6922CBMTTXG is suitable for a variety of applications, especially where an external adjustable voltage control is required, as it offers excellent line and load regulation. These include automotive applications, industrial motor control or process control, motor tuning controllers, battery charge controllers and brushless motor controllers. It can also be used in other applications where a stable, accurately regulated output voltage is required, such as LED driver circuits.

Working Principle

The NCV6922CBMTTXG consists of two main power stages, a high-side NMOS and a low-side PMOS. The input voltage applied to the regulator is filtered to remove unwanted noise and ripple, before being regulated by the low-side switch. This switch is operated at two frequencies, a high-frequency during normal operation, and a low-frequency when the regulator enters into its power saving mode. This helps to reduce losses during light loads. The feedback mechanism is used to control the output voltage, which is monitored by the internal comparator and used to adjust the duty cycle of the high-side switch.

In order to maintain continuity when the output voltage is changed, a soft-start feature is enabled. This feature limits the inrush current during startup, protecting the circuit from damage. Short-circuit protection is also enabled by an independent hiccup-mode of operation.

The NCV6922CBMTTXG also features integrated thermal protection. This helps to protect the circuit from over temperature conditions, which may lead to permanent damage. The thermal protection will Shut down automatically and then enter into a cooler mode, protecting the integrity of the circuit.

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