L6460 STMicroelectronics, L6460 Datasheet - Page 74

• 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

Power bridges
Figure 19. Regulator block diagram
74/139
SelFBRef
From Central Logic
Vref= 0.8V
N.C.
N.C.
Vref=3V
To Central Logic
Here after are summarized the primary features of the regulator(s):
Depending on the load current, there could be the necessity to add a Schottky diode on
output to reduce internal thermal dissipation. This diode must be placed near to the pin and
must be fast recovery and low series resistance type.
For detail about pulse skipping please refer to main switching regulator
page
The output voltage will be externally set by a divider network connected on feedback pin. To
reduce as much as possible the regulation voltage error L6460 has the possibility to switch
between four regulator feedback voltage references (and, as a consequence, four under-
Control
Logic
–
–
–
–
–
–
–
–
Obtained using spare analo
54.
Synchronous rectification
Automatic low side disabling when current in the inductance reaches 0 to optimize
efficiency at low load
Pulse skipping control
Internally generated PWM
Cycle by cycle current limiting using internal current sensor
Protected against load short circuit
Soft start circuitry
Under voltage signal (both continuous and latched) accessible through serial
interface.
Filter
Regulator Ref
Charge pump Voltage
High Side
Low Side
Driver
Driver
Regulator Freq
+
-
Current Sense
g
Under voltage
/di
Threshold
g
ital blocks
V
supply
Doc ID 17713 Rev 1
Loop Control
Voltage
+
-
Half Bridge OUT
GPIO USED as FB
Bridge Sense
La
Section 13.3 on
C
R
a
R
L6460
b
V
out