L6230PD STMicroelectronics, L6230PD Datasheet - Page 16

• 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

Application information
6.2
16/24
The uncommitted internal comparator with open-drain output is available.
Figure 14. F.O.C. typical application
Six-step driving method with current control
In this configuration only one sense resistor are needed, the three OUT pins are connected
together to R
The non-inverting input comparator CP+ monitors the voltage drop across the external
sense resistor connected between the source of the three lower power MOS transistors and
ground.
As the current in the motor increases the voltage across the R
proportionally. When the voltage drop across the sense resistor becomes greater than the
reference voltage applied at inverting input CP- the comparator open-drain output is
switched on pulling down the CPOUT pin.
This signal could be managed by controller to generate the proper input sequence for six-
step driving method with current control and select what current decay method to
implement.
When the sense voltage decrease below the CP- voltage, the open-drain is switched off and
the voltage at CPOUT pin start to increase charging the capacitor C3.
The reference voltage at pin CP- will be set according to sense resistor value and the
desired regulated current (V
voltage is to low-pass filter a PWM output of a controller.
SENSE
(see
Figure
CP-
Doc ID 18094 Rev 1
{ R
15).
SENSE
x I
TARGET
). A very simple way to obtain variable
SENSE
increases
L6230