STEC01中文资料Ground Path Safety Switch with programmable timers数据手册ST规格书

描述 Description

The STEC01 is an integrated programmable 12 mΩ power switch managed by the timer based circuitry.

The device has 3 timers designed to interrupt the ground path of a power application after a maximum on-time and inhibits the restart of the platform during a cooling window. The maximum on-time can be set from few seconds to hundreds of seconds, while the cooling window can be programmed to 69, 345 and 1380 seconds.

3 multi-level input pins, combined with a programmable oscillator and a fixed oscillator, are used to set the timing.

An input continuous or pulsed signal applied to the PWM pin starts the internal logic and counters. In case of a normal operation, as soon as the activity on the PWM pin stops, the device automatically enters idle mode, waiting for a new valid PWM signal to be applied. If the device detects a fault condition, a reset pulse is generated and the safety MOSFET is turned off and managed according to a predefined state machine.

The STEC01 has a continuous current capability up to 7 A through the internal power MOSFET. A higher current can be supported by using an external power transistor driven through GDRV pin.

A rising edge on the HW_RESET input pin generates a 57 ms pulse on the RESET_FAULT pin. This function can be used to notify the connection of an external power source (e.g. USB).

特性 Features

• Input voltage range from 2.2 to 5 V
• 12 mΩ typ. N-channel FET RDS(on)
• 7 A continuous current capability
• PWM control signal from 4 Hz to 5 kHz, with 30% to 100% duty cycle
• 30 µA battery supply current
• 2 programmable timers: T1, T3
• 1 fixed timer T2
• Input undervoltage lockout
• VFQFPN 3x3x0.9 16L, 0.5 mm pitch package

简介

STEC01属于集成电路（IC）的专用IC。由ST制造生产的STEC01专用 IC专用专用集成电路 (IC) 或芯片设计用于执行特定功能。这个类别包括可寻址开关、空芯仪表驱动器、音视频开关、验证芯片、自动放电、时钟发生器、彩色扫描仪，以及各种应用所用的其他许多集成电路。