MAX6855UK40D2+T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active High
Reset Timeout:	40 ms Minimum
Voltage - Threshold:	4V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SC-74A, SOT-753
Supplier Device Package:	SOT-23-5
Base Part Number:	MAX6855

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PMIC - Supervisors: MAX6855UK40D2+T application field and working principleMAX6855UK40D2+T is a supervisor integrated circuit that is categorized as a power management IC (PMIC). It is specifically designed to protect single-cell, two-cell, or three-cell Lithium-Ion battery packs, as well as for other applications such as over-voltage and under leakage protection, alarm, load shift control, and over-current protection.Application FieldMAX6855UK40D2+T is suitable for a variety of applications, from portable electronics to industrial electronics. It is based on the I2C-compatible interface and provides built-in protection for the system. In portable devices such as cameras, mobile phones, and media players, it is used to monitor battery voltage, state of charge, and current load; in industrial systems, it can be used to detect and isolate possible power anomalies (such as over-voltage/under-voltage, over-current/under-current, and over-temperature).Working PrincipleThe MAX6855UK40D2+T is based on the I2C-compatible bus and registers, allowing for configuration and control of the supervisor as well as status reporting. The supervisor is a sophisticated, low power monitoring circuit designed to detect and correct power related fault conditions, including over-voltage, under-voltage, over-isp, under-isp, over-current, and over-temperature conditions. MAX6855UK40D2+T programmable features include various logic levels, voltages and thresholds, clock distributions, pulse widths, and selectable power on/off sequences. The supervisor includes two channels that monitor two independent voltage sources simultaneously. Each channel provides a programmable upper and lower comparator trip point, with separate alarm indication (ALM) and manual reset (MR) outputs. The device also includes voltage and temperature monitors, which can be programmed with limits to ensure safe operation.When any of the monitored values violate the programmed limits, the supervisor will immediately shut off the power and generate an alarm signal, allowing for quick detection and correction of potential problems. The device can be synchronized with a real-time clock (RTC) to provide time stamping, and the internal registers can be accessed and programmed with SPI, I²C, and other protocols.FeaturesThe MAX6855UK40D2+T offers many advantages over traditional systems, including: •High Accuracy: The supervisor monitors both voltage and temperature with a high degree of accuracy, allowing for more precise control and more reliable results. •Power-on Sequencing: The device can power up each circuit element in a predetermined order, preventing data corruption or system instability. •Fault Protection: When a fault is detected, the supervisor will immediately shut down the system and generate an alarm signal, so the fault can be corrected before damage occurs. •Easy Configuration: Configuration registers can be set up and programmed with various protocols, simplifying the setup process. •Low Power Consumption: The device is energy efficient, requiring minimal current to maintain operation.ConclusionThe MAX6855UK40D2+T is a versatile, powerful supervisor that offers many advantages, such as precision monitoring, fault protection, and easy configuration. It provides a reliable protection for portable electronics and industrial systems, minimizing the risk of system damage due to power faults.

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