L6230PD STMicroelectronics, L6230PD Datasheet - Page 17

• Manufacturer Part Number: L6230PD
• Description: Motor / Motion / Ignition Controllers & Drivers DMOS Driver 3-Phase Brushless DC Motor
• Manufacturer: STMicroelectronics
• Type: DMOS Driverr

Specifications of L6230PD

• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 8 V to 52 V
• Supply Current: 1.4 A
• Mounting Style: SMD/SMT
• Package / Case: PowerSO-36
• Operating Temperature: - 40 C to + 125 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6230
6.3
Figure 15. Six-step with current control typical application
Six-step driving method with BEMF zero crossing detection
The BEMF zero crossing information can be used to evaluate the rotor position; in this way
no Hall effect sensors or encoder are needed.
In six-step driving mode one of the three phases is left in high impedance state.
Comparing the voltage of this phase with the center-tap voltage we can detect the BEMF
zero-crossing.
In shown example (see
center-tap voltage is obtained as combination of three phase voltages and monitored by the
CP- pin. Only when the OUT1 is in high impedance, the CPOUT will perform a commutation
each time a BEMF zero crossing is detected.
In this configuration one sense resistor is needed, the three OUT pins are connected
together to R
SENSE
.
Figure
Doc ID 18094 Rev 1
16), the OUT1 phase voltage is monitored by the CP+; the
Application information
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