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AN2829 Fiches technique(PDF) 16 Page - STMicroelectronics

No de pièce AN2829
Description  Dual step-down controller with auxilary voltages
PDF  32 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2829 Fiches technique(HTML) 16 Page - STMicroelectronics

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Jumper settings
AN2829
16/32
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SMPS mode selection (skip)
Table 5.
Jumper S10 (connect SKIP pin to S10)
Position
Switching operating mode
GND
If the SKIP pin is tied to ground, pulse-skip mode occurs at light loads. A
zero crossing comparator prevents the inductor current from going
negative.
VREF
Connecting the SKIP pin to the VREF pin enables pulse skip mode with a
minimum switching frequency of approximately 25 kHz (ultrasonic mode).
LDO5
If the SKIP pin is tied to 5 V, fixed PWM mode occurs. The switching output
is in a position to sink and source current from the load.



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