L6460 STMicroelectronics, L6460 Datasheet - Page 78

• 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 23. Simple buck regulator
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PULSE SKIPPING
BURST
CONTROL LOGIC
PEAK CURRENT
MODE CONTROL
LOGIC
L6460
When this control loop is intended to be used as a simple buck regulator, the proper
Aux3BatteryCharge bit must be written in the Aux3SwCfg1 register.
The regulator will also implement a soft start strategy.
When L6460 “low power mode” is enabled this regulator will be disabled.
Here after are summarized the primary features of the regulator:
In pulse skipping control PWM the duty cycle must be decided by the user depending on
supply voltage and regulated voltage.
Therefore the switching regulator has 4 possible PWM duty cycles that can be changed
writing in the Aux3PWMTable[1:0] bits in the Aux3SwCfg1 register according to the
Table
–
–
–
–
–
–
–
–
31.
PWM
Ilimit
Internal power switch.
Nonlinear pulse skipping control.
Internally generated PWM (250 KHz switching frequency).
Cycle by cycle current limiting using internal current sensor/ external current
sense differential amplifier.
Protected against load short circuit.
Soft start circuitry to limit inrush current flow from primary supply.
Under voltage signal (both continuous and latched) accessible through SPI.
Over temperature protection.
COMP_I
SelCurrRef<1:0>
SelFBRef<1:0>
PARALLELED
BRIDGE 4
POWER
STAGE
COMP_V
FBRef
CurrRef
Doc ID 17713 Rev 1
DC4_plus
DC4_minus
VREF_FB
IREF_FB
L6460
LOAD
TO