IR3230SPBF View Datasheet(PDF) - International Rectifier
Part Name
Description
Manufacturer
IR3230SPBF Datasheet PDF : 22 Pages
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IR3230SPbF
Shtp & Shtm, over Current protection:
The IR3230 has shunt interface input: Shtp & Shtm. This shunt measurement is referenced to the Vcc (measurement on
the battery line). Thanks to the shunt value and an external divider resistor, the user can adjust the maximum current in
the motor. The internal threshold is Vth Isd. This protection is latched so the Flt output is activated (High state) to provide
a diagnostic to the µP. This protection can be reset by activating Flt_rst high for more than Trst time. This protection works
only in the motor mode.
Tp & Vss, over temperature protection:
The IR3230 has CTN interface input: Tp, Vss. This CTN is referenced to the Vss. Thanks to an external resistor in series
with the CTN resistor; the user can adjust the maximum temperature threshold. The internal threshold is Vth Tsd. This
protection is latched so the Flt output is activated (high state) to provide a diagnostic to the µP. This protection can be
reset by activating Flt_rst high for more than Trst time.
Mot/Regen:
This digital input allows selecting the motor mode or the regeneration mode (braking mode). The µP needs to implement a
delay to switch from one to the other to avoid shoot through short circuit and activate the over current fault. This can be
calculating by using the “Td xxx xx” parameters in the Switching electrical characteristics. Use the following parameters as
a simple rule:
Delay to go from the motor mode to the regen mode: use the maximum of the Td2 MtoR Hox off + the
maximum of the Tf2_Hox-Vsx parameter.
Delay to go from the regen mode to the motor mode: use the maximum of the Td1 RtoM Lox off + the
maximum of theTf Lox parameter.
Pwm:
In motion mode, through the pwm input, the µp controls the speed of the motor. This input provides duty cycle and the
frequency to the low side switches in order of the sensor table selected by logical sensor input.
In regen mode (buck converter operation), It provides the duty cycle and the frequency to the 3 low side switches in same
time independently of the sensor input sequence. So the µP can controls the regeneration current level in the battery and
breaking the motor.
En:
The input Pin enable allows switching off all output power Mosfets and the Charge pump. This reduces the consumption
of the device. The Out_supply output stays active to power supply the µP even if the Enable is set at 0V. En pin high wake
up the device. When the voltage of charge pump capacitor reaches the UV pump threshold, the device wait for the power
reset (Pwr on rst) and then it is ready to operate.
120/60°:
This digital input selects the right sensor table in order to the sensor electrical position 120° or 60°.
Out_supply:
This output provides a 1.6mA regulated current. This output can be used as a biasing to create a power supply thanks to
an external zener diode and a bipolar ballast transistor. The created voltage of this power supply is defined by the value of
the zener diode implemented. This power supply could be used to supply all external circuitries (Sensor, µP…).
Rev/Fwd:
This digital input selects the right sensor table in order to choose the motor direction forward and reverse.
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