iC-HT
DUAL CW LASER DIODE DRIVER
nar y
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Rev A1, Page 1/42
APPLICATIONS
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Laser diode modules
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CW laser diode drivers
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Embedded laser diode
controllers
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Safety related laser controllers
FEATURES
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Dual channel CW operation with up to 750 mA per channel
Up to 1500 mA with both channels combined
2.8 V to 8 V power supply
Operation with or without µController
Individual enable input per channel
Control loop accuracy better than 1%
Internal programmable logarithmic monitor resistor
Operating point setup with 10 bit logarithmic resolution
ACC or APC mode individually configurable for each channel
A/D converters for analog monitoring
Serial programming interface (SPI or I²C compliant)
Configuration content verification and validation
Laser channel disable with programmable overcurrent
threshold
Optimized for N-type laser diodes
Low drop linear regulator for 3.3 V
Low current standby mode
Temperature monitor
Temperature range -40 . . . 85 °C
PACKAGES
QFN28 5 mm x 5 mm
BLOCK DIAGRAM
VB
2.8...8V
DUAL CW LASER DIODE DRIVER
VDD REGULATOR
VB
-
+
ACC
REF
RAM
INTEGRITY
CHECK
0x10
0x30
0x11
ILIM1(7:0)
RAM
REGISTERS
DCO
8 Bit
D
A
10 Bit
D
A
OVC1
VDD
CVB
1μF
CVDD
1μF
N
0x1F
VB UNDERVOLTAGE
VDD UNDERVOLTAGE
0x3F
0x13
0x14
=1
REF1(9:8)
REF1(7:0)
LDK1
+
ECIE1
CI
CI1
..750mA
CI1
CIL1
..10 nF..
MEMERR
NCHK
CFGTIMO
Check
PODO
OVT
OVC
OSCILLATOR
EMC
NCS/A1
MOSI/A0
SCLK/SCL
MISO/SDA
0x05
INS/WKR
NSTBY
EC1
EC2
LASER
CONTROL
0x18
0x19
0x17
T.PAD
GND
GND
TEMPERATURE
MONITOR 8 Bit
0x02
TEMP(7:0)
LASER CHANNEL 2
REF2(9:8)
REF2(7:0)
RMD2(7:0)
0x06
0x16
ADC2(9:8)
ADC2(7:0)
ILIM2(7:0)
0x12
SPI/I2C
SLAVE
LASER CHANNEL 1
RMD1(7:0)
0
IO DRIVERS
0x10
ADCC1(2:0)
EMC
DISP1
-
LDK1
WATCHDOG
EACC1
AGND1
MDA1
WATCHDOG
TIMER
0x03
0x04
ADC1(9:8)
ADC1(7:0)
10 Bit
A
D
VDD
VB
ADSNF1
R
8 Bit
APC
PLR1
255
MRL1
N
RM1
LDK2
CI2
..750mA
CI2
CIL2
AGND2
MDA2
..10 nF..
RM2
MRL2
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