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AN8014S Datasheet(Fiches technique) 5 Page - Panasonic Semiconductor

Numéro de pièce AN8014S
Description  Step-down, step-up, or inverting DC-DC converter control IC
Télécharger  18 Pages
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Fabricant  PANASONIC [Panasonic Semiconductor]
Site Internet  http://www.panasonic.com/industrial/
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Voltage regulators
AN8014S
5
Pin No.
I / O
Equivalent circuit
Description
1O
VREF:
Outputs the reference voltage
2.6 V (allowance: 3%)
Incorporating short-circuit protection
against ground.
2
RT:
Connection for the timing resistor which
decides the oscillator frequency. Use a re-
sistor in the range 5.1 k
Ω to 30 kΩ. The
pin voltage is approx. 0.4 V.
3
CT:
Connection for the timing capacitor which
decides the oscillator frequency. Use a ca-
pacitor in the range 100 pF to 10 000 pF.
For the oscillator frequency setting, refer
to the "Application Notes, [1] Function
descriptions" section. Use an oscillator fre-
quency in the range 5 kHz to 500 kHz.
4
DTC:
Connection for a resistor and a capacitor
that set the dead-time and soft start period
of PWM output.
Input current IDTC is decided by the timing
resistor RT which controls sample to sample
variations and temperature variations.
It is approx.
−13.2 µA when R
T = 15 kΩ.
IDTC =
VRT × 1 [A]
RT
2
s Terminal Equivalent Circuits
1
VCC
VREF
100
2
DTC
S.C.P.
VREF
RT(
≈ 0.4 V)
OSC
comp.
To PWM input
VREF
CT
IO
2IO
3
2
VREF
RT
CDTC
IDTC
RDTC
DTC
4
PWM comparator
input




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