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ZIOL2201 Datasheet(PDF) 55 Page - Renesas Technology Corp

No. de pieza ZIOL2201
Descripción Electrónicos  IO-Link Compliant HV Line Driver IC Family
PDF  92 Pages
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Fabricante Electrónico  RENESAS [Renesas Technology Corp]
Página de inicio  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ZIOL2201 Datasheet(HTML) 55 Page - Renesas Technology Corp

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ZIOL2xxx Datasheet
© 2016 Integrated Device Technology, Inc.
55
April 26, 2016
The converter runs independently from the two driver channels (COM/AUX) and their digital control state
machine. A reset has no influence on the DC/DC converter.
3.6.2.
Principle of Operation
Figure 3.21 shows the working principle of the DC/DC converter. Required external components are described in
chapter 3.6.3.
Figure 3.21 DC/DC Converter in Principle
Supply of External Applications
C1
R1
R2
err
amp
Control
CMP
A
Triangle
Linear
Regulator
delay
OSC
DIV
VDD_LV
SW
FB
VDD_HV
VIN
VOUT
VDD
LR_IN
VSS
DC_RDY
Vref
D1
en
= Function (building block) can be
enabled / disabled by corresponding
configuration register data.
en
Soft Start
Power-on
reset
C2
L1
The DC/DC converter senses the output voltage divided by the resistors R1 and R2 at pin FB. The difference
between this signal and the reference voltage is amplified and then transformed into a PWM signal by comparing
it with a triangular waveform. The PWM signal now enables and disables the output transistor. This results in a
pulse length modulated signal with an amplitude of VDD_HV and –VD (the Schottky diode forward drop) which is
then been filter via a second order LC filter to generate the output voltage VOUT.



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