iC-NZP
P-TYPE LASER DIODE DRIVER
nar y
limi
pre
Rev B1, Page 2/15
DESCRIPTION
Laser diode pulse driver iC-NZP allows CW opera-
tion of laser diodes and spike-free switching with de-
fined current pulses up to 155 MHz. The optical out-
put power of the laser diode is set-up by means of an
external resistor (RMD/PMD). For laser current con-
trol without a monitor diode, the laser current moni-
tor at pin IMON is utilised. For high pulse frequen-
cies the device can be switched into controlled
burst
mode.
A previously settled operating point is main-
tained throughout the burst phase.
An averaging current monitor can be set by an ex-
ternal resistor at pin RSI. When the current limit is
reached, overcurrent is signalled at NERR and the
current from pin VCCA is limited to the pre-set value
but the iC is not shut down. There is an additional
current limitation in pin LDA that prevents the iC from
overpowering the laser diode.
Setting pin NSLP low, the iC enters a low consump-
tion sleep-mode (< 50 µA typ.).
PACKAGES QFN24 4 mm x 4 mm to JEDEC
PIN CONFIGURATION
PIN FUNCTIONS
No. Name Function
22
21
20
19
24
23
1
2
3
4
5
6
18
17
16
NZP
code...
...
15
14
13
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VDD
GND
MD
IMON
NCID
EP
EN
TTL
VSY
SYN
RGND
RVDD
LDA
CI
CIS
VDDL
VDDA
AVG
RSI
REGE
GND
NSLP
NERR
Power Supply
Ground
APC setup, monitor input
Laser Current Monitor
Disable Pulldown Current at CI
Positive LVDS/TTL switching input
Negative LVDS switching input
Enable TTL input
Sync Output Supply Voltage
Sync Output
Reference Ground
Reference (P-type laser diodes)
Laser Diode Anode
Power Control Capacitor
Power Control Capacitor sense
Laser Power Supply
Analogue Power Supply
Averaging Control Enabled
Current Monitor Setup
Control Enable
Ground
Not Sleep-Mode
Error Output
n/c
The
Thermal Pad
is to be connected to a Ground Plane (GND) on the PCB.
Only pin 1 marking on top or bottom defines the package orientation ( NZP label and coding is subject
to change).
ICHAUS [ IC-HAUS GMBH ]
