L6460 STMicroelectronics, L6460 Datasheet - Page 53

• 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 12. Switching regulator controller functional blocks
13.1
From Central Logic
SelFBRef [ 1:0]
Vref=0.8V
Vref=0.8V
Vref = 3 V
Vref = 3V
To Central Logic
under voltage flag
Pulse skipping operation
Pulse skipping strategy has already been explained on main switching regulator section.
This regulator has 4 possible PWM duty cycles that can be changed writing in the
SelSwCtrPWM bits in the SwCtrCfg register using SPI.
Table 12.
Control
SelFBRef
Logic
SelSwCtrPWM[1:0]
SwCtrCfg register
Uv Threshold 2
Uv Threshold 1
Charge pump Voltage
Filter
00
01
10
11
Switching regulator controller PWM specification
VFBRef
Regulator Freq
Driver
Loop Control
+
-
Voltage
Under voltage
Current Sense
Threshold
+
-
Duty cycle value
V
Doc ID 17713 Rev 1
supply
Typical
22.5%
12%
58%
9%
V
V
V
V
SWDRW_sns
SWDRV_gate
SWDRV FB
SWDRV SW
R
sense
N-CH Fet
Switching regulator controller
Default state
Comments
La
C
R
a
R
b
53/139
V
out