L6460 STMicroelectronics, L6460 Datasheet - Page 85

• 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
16
Current DAC circuit
L6460 includes a multiple range 6-bit current sink DAC. The LSB value of this DAC can be
selected using the DacRange[1:0] bits in the CurrDacCtrl register.
The output of this circuit is connected to GPIO[8] that is a 5 V tolerant pin. The value of this
pin can be converted using ADC. The pin value can be scaled before being converted by
enabling the internal resistor divider connected to this pin. If the current sunk by resistor
divider is not acceptable the pin voltage can be converted without scaling its value. When
the conversion without scaling resistor is chosen a clamping connection is used to avoid
voltage compatibility of the pin to the ADC system. The clamping circuit will sink a typical
current of half microampere from the pin during the sampling time.
Figure 25. Current DAC block diagram
The circuit is enabled by setting to logic ‘1’ the EnDac bit in the CurrDacCtrl register then the
desired sunk current value is chosen by changing the value of the DacValue[5:0] bits in the
same register being DacValue[0] the least significant bit and DacValue[5] the most
significant bit.
A2DChannel2 [4
A2DChannel1 [4
DacRange [1:0]
DacValue[5:0]
EnDac
EnDac
Gpio8 Clamp
DacRange[1:0]
(to ADC)
: 0]
:
0]
Combinatorial
Combinatorial
Mask
Mask
Recognized
Recognized
Doc ID 17713 Rev 1
Address
Address
Va3
Reference Current
Generator
Current Sink
DAC
EnDacScale
Clamp circuit
RCurrDac
Gpio[8] Digital Driver
Current DAC circuit
Gpio[8]
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