BD46391G-TR

The BD46391G-TR is a system supervisor IC with embedded reset, voltage monitor, watchdog timer, power-on reset (POR) and power-down reset (PDR) on a single chip. Additionally, it includes low voltage circuits, which enable various low-voltage applications. As a POR/PDR scheme, it has a built-in three-level detector and enhances stable start-up in a system power supply that has multiple outputs. This feature is suitable for systems that require an extended POR detection and an ultra-long detection in the wake-up from a power down reset. This device supports a wide set of operating modes, such as dispensed reset and reset lockout for a unique requirement.

The BD46391G-TR belongs to the PMIC - Supervisors category. It is a combined POR/PDR scheme, power monitor, and watchdog timer system supervisor device. Its detection range is typically 2.6 V to 6.0 V, with a specified detection accuracy of ± 0.3 V. This device also supports a range of reset signal outputs, including open drain, positive logic and negative logic signals. It has high integrative design, saved PCB area and minimized external component count.

The working principle of BD46391G-TR can be divided into two main parts: voltage detection and reset signal output. On one hand, it integrated a 93.1 ms configurable delay for stable reset signal. It can also be set at 1 minute/1 hour period for long-lasting reset signal generation. Additionally, it includes four built-in analog comparators to detect voltage changes from 2.6 V to 6.0 V. On the other hand, this device monitors voltage levels with 0.3 V accuracy and can supply an accurate reset output when the system power drops. Moreover, it provides an open drain reset output that can support both a positive logic or negative logic reset signal. This reset signal is a high active reset, capable of using the shutdown or reset signal of other MCU systems to trigger its own output.

In summary, the BD46391G-TR is a system supervisor IC with embedded reset, voltage monitor, watchdog timer, power-on/power-down reset on a single chip. It has a built-in three-level detector and supports a range of reset signal outputs, such as open drain, positive logic and negative logic signals. It has high integrative design, saves PCB area and minimizes external component count. It can set delay time to indicated seconds or minutes, with the accuracy of 0.3 V. It can be used in a range of applications, such as consumer electronics and home appliances.