IC-HTP Datasheet, PDF (25/51 Pages) IC-Haus GmbH – DUAL CW P-TYPE LASER DIODE DRIVER

iC-HTP
DUAL CW P-TYPE
LASER
DIODE
DRIVER
preliminary
ILIM2
0x00
...
0xFF
Addr. 0x16; bit 7:0
R/W 0xFF
Channel 2 overcurrent threshold set to the minimum
current in APC mode (EACC2 = 0) or overcurrent
protection disabled in ACC mode (EACC2 = 1)
Channel 2 overcurrent threshold set to
Ilim = (∆I(LDA), max · n · k), n from 0 to 255
Channel 2 overcurrent threshold set to the maximum
current
Table 54: Overcurrent threshold configuration
channel 2
Rev B1, Page 25/51
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
MDK2, as it is shown in figure 12.
VB
CVB
1μF
CVDD
1μF
GND
DUAL CW LASER DIODE DRIVER
VDD REGULATOR
VB
- ^REF
VDD
+
NCHK
EMC
NCS/A1
MOSI/A0
SCLK/SCL
MISO/SDA
INS/WKR
NSTBY
EC1
EC2
T.PAD
GND
VB UNDERVOLTAGE
VDD UNDERVOLTAGE
CFGTIMO
Check
PODO
OVC
MEMERR
WATCHDOG
OVT
IO DRIVERS
TEMPERATURE
MONITOR 8 Bit
RAM
INTEGRITY
CHECK
0x10 0x30
0x1F 0x3F
RAM
REGISTERS
0x13 REF1(9:8)
0x14 REF1(7:0)
0x11 ILIM1(7:0)
WATCHDOG
TIMER
OSCILLATOR
0x12 RMD1(7:0)
SPI/I2C
SLAVE
LASER
CONTROL
0x03
0x04
ADC1(9:8)
ADC1(7:0)
0x10 ADCC1(2:0)
0x16 ILIM2(7:0)
0x18
0x19
REF2(9:8)
REF2(7:0)
0x05
0x06
ADC2(9:8)
ADC2(7:0)
0x17 RMD2(7:0)
0x02 TEMP(7:0)
10 Bit
D
A
EACC1
8 Bit
D
A
+
-
CI
OVC
ECIE1
DCO
VBL1
CIH1
CI1
LDA1
ACC
VDD
MRH1
VB
CI1
..10 nF..
I LDA1
EM C
8 Bit
DISP1
R
0
255
10 Bit
A
D
LDA1
VBL1
VB
A DM DK 1
LASER CHANNEL 1 ADFNS1
x1
x2
Signal Level Converter
CI
LDA2
10 Bit
A
D
VBL2
VDD
ADM DK2
APC
MDK1
VBL2
CIH2
CI2
LDA2
MRH2
RM1
P
VB
I LDA2
LASER CHANNEL 2
MDK2
Figure 12: Additional photodiode in combined configuration