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IC-DC Datasheet(PDF) 17 Page - IC-Haus GmbH |
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IC-DC Datasheet(HTML) 17 Page - IC-Haus GmbH |
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17 / 19 page  preliminary preliminary iC-DC 2-CHANNEL BUCK/BOOST DC/DC CONVERTER Rev A3, Page 17/19 EXAMPLE APPLICATION INDEX OUTPUT AND iC-TL85 iC-PT Series VB1 VOLTAGE ENABLE LIN.-REG.1 SUPPLY OUTPUT SWITCH 2 5V/3.3V/R1:R2 VCC1: VCC2: 4.5..32V SELECT RESOLUTION NB U V W PZ SUPPLY THERMAL SHUTDOWN BUCK SUPPLY LIN.-REG.2 CONTROL MONITORING REFERENCE SEL 0V VB3 PB PROTECT. LED POWER CONTROL OUTPUT COMPARATION SIGNAL BIAS BOOST SWITCHING REGULATOR 3.3V/2.5V/R3:R4 OSCILLATOR ERROR DETECT. AUTARKY DETECT. REVERSE INTERNAL CONFIGURATION MONITOR COMMUTATION PA SWITCH 1 VOLTAGE iC-DC NERR_DC iC-DL NA VB2 iC-LTA POWER-ON RESET QUADRATURE NZ + - C1 100nF RREF 20k 100nF C5 10μF CVBR D12 D13 D10 D11 D5 D6 D7 D3 D4 D1 D2 D9 ZD1 47 RLED ZD2 C2 100nF R3 CVB 1μF 1 1 D8 100nF 100nF C3 & C4 CVH 3.3μF CVCC2 1μF 1μF CVCC1 3.3μF CVH1 & 2 CVH2 3.3μF LVBH 22μH 2 2 ERROR DETECTION UNDERVOLTAGE & OVERTEMPERATURE MODE 1 R2 2k RERR A6 A3 A5 VBR R1 30.1k 10k GND SEL VCC2 VCC1 NER A1 A2 A4 E2 E3 E4 E5 E6 GND3 VCC NER A1 A2 A3 A4 A5 A6 VB1 VB2 VB3 DIFF GND4 GND2 GND1 VCC1 VCC2 VCC1 NERR_DC NERR_DC VB VCC LED PA NZ PZ NB PB NA VBR ENA TNER E1 RREF VCC1,VCC2 TEST V1OK V2OK VCC2 POE2 TOK VBROK VH1 GND GND W V TIP TIN U VBR VBL VHL VH GNDA VB CFG1 CFG2 ENV1 ENV2 NAUT VH2 POE1 VCC1 20k RREF 100nF C1 RLED 47 ZD1 D1 D2 D9 D3 D4 D5 D6 D7 D10 D11 D12 D13 C5 100nF CVBR 10μF ZD2 100nF C2 D8 R3 1μF CVB & 100nF C4 C3 100nF 3.3μF CVH2 & 1μF CVCC2 CVCC1 1μF CVH1 3.3μF 3.3μF CVH 22μH LVBH 0 1 0 1 1 OVERTEMPERATURE UNDERVOLTAGE & ERROR DETECTION & MODE 0 1 30.1k R1 R2 10k RERR 2k Figure 9: Application with iC-DC, iC-PT, and iC-DL 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- DC error messages to iC-DL’s own undervoltage and overtemperature monitor. iC-DL’s open-drain error 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. The illustrated 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. |
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