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IC-HT 数据表(PDF) 22 Page - IC-Haus GmbH |
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IC-HT 数据表(HTML) 22 Page - IC-Haus GmbH |
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22 / 45 page  prel imin ary prel imin ary iC-HT DUAL CW LASER DIODE DRIVER Rev B1, Page 22/45 nel 2 should be disabled by setting it to its maximum value (0xFF). An overcurrent will only be detected on channel 1. ILIM1 Addr. 0x11; bit 7:0 R/W 0xFF 0x0A Channel 1 overcurrent threshold: 80 mA, MERGE=1 . . . Channel 1 overcurrent threshold set to Ilim = (2 ∗ ∆I(LDK ) · n), n from 10 to 255, MERGE=1 0xFF Channel 1 overcurrent threshold: 2040 mA, MERGE=1 Table 45: Overcurrent threshold configuration channel 1 with MERGE = 1 It is possible to use a second photodiode connected to channel 2 (e.g. as a safety supervisor). The ADC on channel 2 can be used to monitor the voltage at pin MDA2, as it is shown in figure 12. ADC1(7:0) 0x05 ADC2(9:8) 0x06 ADC2(7:0) 1μF CFGTIMO WATCHDOG WATCHDOG TIMER 0x16 ILIM2(7:0) 0x18 0 255 OSCILLATOR LASER CONTROL ACC APC PLR1 REF2(9:8) 0x19 REF2(7:0) 0x17 RMD2(7:0) INTEGRITY RAM CHECK VB UNDERVOLTAGE VDD UNDERVOLTAGE OVC PODO OVT MEMERR 10 Bit A D 0x10 0x03 ADC1(9:8) 0x04 VDD REGULATOR LASER CHANNEL 1 LASER CHANNEL 2 DUAL CW LASER DIODE DRIVER RM1 ADCC1(2:0) 0x10 0x1F 0x30 0x3F 1μF IO DRIVERS REGISTERS SPI/I2C SLAVE RAM 10 Bit A D 8 Bit A D 0x02 TEMP(7:0) 0x11 ILIM1(7:0) 0x13 REF1(9:8) 0x14 REF1(7:0) 0x12 RMD1(7:0) R 8 Bit ..10 nF.. TEMPERATURE MONITOR 8 Bit + - CVB CVDD + - N I LDK CI1 INS/WKR NSTBY EC1 VB VDD LDK1 GND T.PAD EACC1 ADSNF1 OVC1 DISP1 EMC CI AGND1 CI LDK1 VB CIL1 VDD GND REF MRL1 NCHK Check VB MRL2 MDA2 AGND2 CIL2 CI2 LDK2 MDA1 CI1 ECIE1 DCO EC2 EMC NCS/A1 MOSI/A0 SCLK/SCL MISO/SDA CVDD CVB N I LDK CI1 Figure 12: Additional photodiode in combined configuration |
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