L6460 STMicroelectronics, L6460 Datasheet - Page 75

• Manufacturer Part Number: L6460
• Description: MOSFET & Power Driver ICs SPI Config Stepper DC Multi Motor DRV
• Manufacturer: STMicroelectronics
• Type: Full-Bridge Driverr

Specifications of L6460

• Product: Half-Bridge Drivers
• Rise Time: 0.4 us
• Fall Time: 0.4 us
• Supply Voltage (max): 38 V
• Supply Voltage (min): 13 V
• Supply Current: 11 mA
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 4
• Output Current: 10 mA
• Output Voltage: 30 V
• Package / Case: TQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6460
14.1.7
voltage thresholds) using serial interface. The feedback reference voltage is selected by
writing the SelFBRef[1:0] bits in the Aux1SwCfg or Aux2SwCfg registers.
The switching regulators have four possible PWM duty cycles that can be changed using
SPI according to
Table 28.
Regulation loop
As seen before L6460 contains 2 regulation loops for switching regulators that are used
when bridge 3 is used as a regulator. These loops are assembled using internal
comparators and filters similar to that used in main switching regulator.
When bridge 3 is not used for this purpose or when only one regulation loop is needed, the
control loop is available on a GPIO output thus enabling the customer to assembly a basic
buck switching regulator using an external Power FET. The comparators used in the above
mentioned regulation loops are general purpose low voltage (3.3 V) comparators; when the
relative regulation loop is not used they can be accessed as shown in the
Figure 20. Internal comparator functional block diagram
AuxXPWMTable[1:0]
00
01
10
11
PWM specification
Table
GPIOzMod
DECODE
LOGIC
GPIOx
e
28.
Typical duty cycle value
GPIOx
Doc ID 17713 Rev 1
GPIOz Value From SPI
DECODE
LOGIC
GPIOz
10%
13%
24%
61%
+
GPIOy
V
3v3
DECODE
LOGIC
GPIOy
GPIOz Logic
Driver
Default state for AUX1
Default state for AUX2
GPIOyMode
Comments
GPIOz
Figure
Power bridges
20.
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