L6460 STMicroelectronics, L6460 Datasheet - Page 51

• 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
Figure 11. Main switching regulator functional blocks
In pulse skipping control the duty cycle must be chosen by the user depending on supply
voltage and output regulated voltage. Therefore the switching regulator has 4 possible duty
cycles that can be changed by writing the VmainSwSelPWM bits in the MainSwCfg register
according to following
Table 10.
The output current is limited to a value that can be set by means of SelIlimit bit in the
MainSwCfg register according to following
Table 11.
VmainSwSelPWM[1:0]
MainSwCfg register
From Central Logic
SelIlimit
To Central Logic
Under voltage flag
00
01
10
11
0
1
Control
Main switching regulator PWM specification
Main switching regulator current limit
Logic
Filter
Table
Charge pump Voltage
High Side
Driver
Regulator Ref
Current limit (min)
Duty cycle value
10.
+
-
Current Sense
Doc ID 17713 Rev 1
Under voltage
Typical
Regulator Freq
Threshold
63.5%
3.3A
2.3A
12%
15%
26%
VSupply
Loop Control
Voltage
+
-
Table
11.
VSWmain_SW
VSWmain_FB
Default state
Default state
Comments
Comments
Main switching regulator
La
C
R
R
51/139
b
a