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L6758A Datasheet(PDF) 9 Page - STMicroelectronics

Part # L6758A
Description  DPM - dynamic phase management
Download  42 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6758A Datasheet(HTML) 9 Page - STMicroelectronics

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L6758A
Pin description and connection diagrams
42
32
OSC
Oscillator pin.
It allows the programming of the switching frequency F
SW
for the multi-
phase section. The pin is internally set to 1.0 V, frequency for multi-phase
is programmed according to the resistor connected to GND or VCC with a
gain of 10 kHz/μA. Leaving the pin floating programs a switching
frequency of 200 kHz. Effective frequency observable on the load results
as being multiplied by the number of active phases N. See
Section 10 for
details.
33
VR_RDY
VR ready.
Open drain output set free after SS has finished in multi-phase section
and pulled low when triggering any protection. Pull up to a voltage lower
than 3.3 V (typ.), if not used it can be left floating.
34
ENDRV
Enable driver.
CMOS output driven high when the IC commands the drivers. Used in
conjunction with the HiZ window on the PWM pins to optimize the multi-
phase section overall efficiency. Connect directly to external driver enable
pin.
35
SENDRV
Enable driver.
CMOS output driven high when the IC commands the drivers. Used in
conjunction with the HiZ window on the PWM pins to optimize the single-
phase section overall efficiency. Connect directly to external driver enable
pin.
36
PWM4
PWM4 output.
Connect to external driver PWM input. During normal operation the device
is able to manage HiZ status by setting and holding the PWMx pin to fixed
voltage. Pull to 5 V through a 1 k resistor to configure the multi-phase
section to work at 3 phases.
37
PWM2
PWM2 output.
Connect to external driver PWM input.
This pin is also used to configure HiZ levels for compatibility with drivers
and DrMOS. During normal operation the device is able to manage HiZ
status by setting and holding the PWMx pin to pre-defined fixed voltage.
38
PWM3
PWM3 output.
Connect to external driver PWM input. During normal operation the device
is able to manage HiZ status by setting and holding the PWMx pin to fixed
voltage. Pull to 5 V through 1 k resistor in conjunction with PWM4 to
configure the multi-phase section to work at 2 phases.
39
PWM1
PWM1 output.
Connect to external driver PWM input.
This pin is also used to configure HiZ levels for compatibility with drivers
and DrMOS. During normal operation the device is able to manage HiZ
status by setting and holding the PWMx pin to pre-defined fixed voltage.
Table 2. Pin description (continued)
Pin#
Name
Function


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