IC-DC IC-Haus, IC-DC Datasheet - Page 17

• Manufacturer Part Number: IC-DC
• Description: 2-CHANNEL BUCK/BOOST DC/DC CONVERTER
• Manufacturer: IC-Haus

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The application diagram in Figure 9 shows an example
circuit featuring the DC/DC converter iC-DC. The input
voltage range is set to between 4.5 V and 32 V by line
driver iC-DL. The output voltages of the two linear reg-
ulators are each configured to 5 V. VCC2 supplies the
optical 6-channel incremental scanner iC-LTA/iC-PT
and VCC1 the 5 V section of 24 V line driver iC-DL.
This creates a separation in the supply voltage be-
tween the sensing mechanism and the digital switching
section of the circuitry.
The status signals for overvoltage (VBROK) and
overtemperature (TOK) in iC-DC are connected to iC-
DL’s error message input TNER. This links the iC-
EXAMPLE APPLICATION
iC-DC
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
GND
VB
0V
4.5..32V
iC-LTA
iC-PT Series
PA
NA
PB
NB
PZ
NZ
POWER-ON RESET
U
V
W
NERR_DC
NERR_DC
30.1k
30.1k
10k
10k
R1
R1
R2
R2
VCC2 VCC1
RERR
RERR
RREF
RREF
2k
2k
VCC1
VBR
20k
20k
SIGNAL
COMPARATION
AND
QUADRATURE
OUTPUT
INDEX OUTPUT
COMMUTATION
ZD1
ZD1
TIP
D1
D1
SELECT RESOLUTION
CVB
CVB
TIN
1μF
1μF
VBROK
NAUT
TOK
RREF
ENV1
ENV2
CFG1
CFG2
&
&
SEL
SEL
ERROR DETECT.
OSCILLATOR
REFERENCE
OUTPUT
ENABLE
CONFIGURATION
VCC1:
5V/3.3V/R1:R2
VCC2:
3.3V/2.5V/R3:R4
LED
POWER
CONTROL
VB
REVERSE
PROTECT.
INTERNAL
SUPPLY
BIAS
AUTARKY
DETECT.
THERMAL
SHUTDOWN
VOLTAGE
MONITOR
-
+
CVBR
CVBR
10μF
10μF
Figure 9: Application with iC-DC, iC-PT, and iC-DL
VBR
LED
VCC
GND
NA
PB
NB
PA
PZ
NZ
W
U
V
VBR
SWITCHING REGULATOR
C1
C1
100nF
100nF
CONTROL
BOOST
BUCK
GNDA
22μH
22μH
LVBH
LVBH
VBL
iC-DC
GND
RLED
RLED
47
47
VHL
iC-TL85
NERR_DC
1
2
TEST
TNER
ENA
E1
E2
E3
E4
E5
E6
DIFF
LIN.-REG.1
LIN.-REG.2
VCC1,VCC2
DC error messages to iC-DL’s own undervoltage and
overtemperature monitor.
message output NER thus provides the error mes-
sages for both ICs.
This example circuit makes use of iC-DC’s integrated
reverse polarity protection feature.
diodes ZD1, ZD2, D2 to D13 and resistor R3 form the
basis for a protective circuit against overvoltage for all
outputs. No specific designations are given for these
components as these protective circuits are to be indi-
vidually configured and dimensioned according to the
application and requirement.
MONITORING
VOLTAGE
GND1
&
&
1
2
GND2
MODE
MODE
&
1
0
1
0
1
0
SUPPLY
SWITCH 1
SUPPLY
SWITCH 2
2
1
VCC
GND3
GND4
ERROR DETECTION
ERROR DETECTION
VCC1
POE1
VCC2
V1OK
V2OK
OVERTEMPERATURE
OVERTEMPERATURE
POE2
UNDERVOLTAGE &
UNDERVOLTAGE &
C2
C2
100nF
100nF
VH1
VH2
VH
iC-DL
1
CVH
CVH
3.3μF
3.3μF
CVH1
CVH1
3.3μF
3.3μF
CVCC1
CVCC1
1μF
1μF
CVH2
CVH2
3.3μF
3.3μF
CVCC2
CVCC2
1μF
1μF
NER
VB1
VB2
VB3
VCC2
A1
A2
A3
A4
A5
A6
iC-DL’s open-drain error
VCC1
C3
C3
100nF
100nF
C4
C4
100nF
100nF
C5
C5
100nF
100nF
ZD2
ZD2
Rev A3, Page 17/19
R3
R3
The illustrated
D2
D2
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
D8
D8
D9
D9
D10
D10
D11
D11
D12
D12
D13
D13
NER
VB1
A1
A2
VB2
A3
A4
VB3
A5
A6
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