參數(shù)資料
型號(hào)： L8150
廠商： 意法半導(dǎo)體
英文描述： Brushless motor predriver
中文描述： 無(wú)刷電機(jī)預(yù)驅(qū)動(dòng)
文件頁(yè)數(shù)： 14/37頁(yè)
文件大?。?/td> 573K
代理商： L8150
General description
L8150
14/37
4.5
Protection Functions
–
Over-current protection: Low side current recirculation for both smooth and
rectangular drive in normal working condition.
Over-voltage protection: compare motor supply VDC (140V, 280V) and IC internal
reference. All power transistor OFF (all 6 outputs = GND) during over-voltage.
Return to normal operation if VDC is recovered from over-voltage condition. An
hysteresis is present.
–
Lower voltage protection: all power TR OFF (all 6 outputs = GND), if VCC is lower than a
defined voltage threshold (All power Transistors OFF if VCC is between 0 to the defined
voltage threshold). Return to normal operation if VCC is recovered from lower voltage
condition. An hysteresis is present.
Thermal protection: all power transistors OFF by external thermal sense signal. If signal is
high (exceeds Vth), the power is OFF (all 6 output = GND).
Hall sensor fail protection: all power transistor OFF (all output = GND) if Hall signals are
HHH or LLL (Hall signals after digital filter are used).
Power ON reset (SD): internal logic reset when power ON or recovery from short time Power
OFF. All power transistor OFF (all 6 outputs = GND) during reset.
4.6
PWM
carrier frequency: 17-21kHz for Tj = 0 to 125 deg, 18kHz - 20.4kHz for Tj = 25 °C.
4.7
System Clock
Internal oscillator: Fsys =1/Tck= 9.8 MHz typical value.
One pin for external resistor sets the clock frequency (OSC pin).
4.8
External HVIC Bootstrap Capacitor Initialization
Lower arm ALL ON (3 outputs for low side are High, 3 outputs for High side are GND) when
VSP becoming ON (free run release), (while this initialization should not be done when VSP
becoming OFF) initializing time is 0.333 - 0.5 msec.
4.9
Package
28 pins SO28. It is suitable for both reflow and flow soldering.
4.10
Others
Upper and lower arm PWM during rectangular drive; it means both side (upper and lower)
chopping, not one side chopping, during rectangular drive).
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