IC-HTP Datasheet, PDF (12/51 Pages) IC-Haus GmbH – DUAL CW P-TYPE LASER DIODE DRIVER

iC-HTP
DUAL CW P-TYPE
LASER
DIODE
DRIVER
preliminary
VB
GND
CVB
1μF
CVDD
1μF
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
0.25V/0.125V
8 Bit
D
A
+
-
CI
OVC
EM C
8 Bit
DISP1
R
0
255
x1
Rev B1, Page 12/51
DCO
VBL1
CIH1
CI1
LDA1
ACC
VDD
MRH1
VB
CI1
..10 nF..
I LDA1
APC
MDK1
RM1
P
LASER CHANNEL 1
LASER CHANNEL 2
x2
Signal Level Converter
VBL2
CIH2
CI2
LDA2
MRH2
VB
CI2
..10 nF..
I LDA2
MDK2
RM2
P
Figure 4: iC-HTP in iC-WK mode with P-type laser diode and reference VDD-0.125V
In the configuration from figures 3 and 4 pin NSTBY
is connected to VB. This is required to force iC-HTP
leaving standby mode and starting normal operation,
as the pin includes an internal pull-down resistor.
Laser channel enabling
Setting pins EC1, EC2 to hi enables the corresponding
channels. In order to ensure safe operation of iC-HTP,
several events automatically disable both output chan-
nels:
• Pins INS/WKR or EMC left unconnected (IN-
SOPEN, EMCOPEN), iC-HTP enters error mode
and the laser channels cannot be enabled.
• Supply power-down either at VB (PDOVBLx) or
VDD (PDOVDD), the laser channels are uncondi-
tionally disabled during the power down event.
• Overcurrent (OVC) or overtemperature (OVT),
laser channels are switched off. Cycling pins EC1,
EC2 or a power-up is required to switch on the
laser again.