iC-NZ

FAIL-SAFE LASER DIODE DRIVER

Rev B2, Page 19/20

Driving blue laser diodes

It is also possible to drive blue laser diodes with iC-

NZ.

The laser diode is then directly powered by a

second, higher voltage. The laser power is set as de-

scribed above in Switching up to three laser power lev-

els. Figure 17 shows iC-NZ connected up to a blue

laser diode. It is important to note that here the laser

diode supply voltage should be as low as possible to

keep iC power dissipation to a minimum.

CLDA

RSMD

LD

MD

RML

Monitor

Safety

Diode

VSAL

Laser Driver

VSAH

+

−

−

SMD(0)

SMD(1)

+

Safety Monitor Diode

Current Monitor

Finite State Machine

RVDD

SDIS

NSEN

NSEN

SMD

VDD

LDAOK

MDOK

EN

RGND

LDA

GND

VREF

+

APC

+

+

−

CREF

CIL

LDKL

VREF

+

+

+

−

CIM

LDKM

VREF

+

+

+

−

CIH

LDKH

MDL

Monitor

CIH

MDL

NTREN

S1

RSI

REGEN

LENH

LENL

LENM

VDD

RMDH

AGND

CIL

MDL

RMH

RMDM

RMM

CIM

iC−NZ

VDD

5..12V

Figure 17: Driving blue laser diodes

DEMO BOARD

The iC-NZ device is equipped with a Demo Board for

test purposes.

A description of the demo board is

available as a separate document.

This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein,

design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data.

Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source.

iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions

in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of

merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which

information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or

areas of applications of the product.

iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade

mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.