Datasheet

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iC-NZN

N-TYPE LASER DIODE DRIVER

Rev C1, Page 1/17

FEATURES

♦ Peak value controlled laser diode driver for operation from CW

up to 155 MHz

♦ Spike-free switching of laser currents of up to 300mA

♦ Setting of laser power (APC) via external resistor

♦ Optional current control (ACC)

♦ Laser current limitation

♦ LVDS/TTL switching input with TTL monitor output

♦ Low current consumption sleep-mode < 50µA

♦ Safety shutdown with overtemperature

♦ Error signal output with overtemperature, undervoltage and

overcurrent

♦ All current LD types can be used (N/P/M conﬁgurations)

♦ Blue laser diodes supported

♦ Fast soft-start

♦ Strong suppression of transients with small external capacitors

APPLICATIONS

♦ Pulsed and CW laser diode

modules

♦ Laser diode pointers

♦ Laser levels

♦ Bar-code readers

♦ Distance measurement

♦ Blue laser diodes

PACKAGES

QFN24

4 mm x 4 mm

BLOCK DIAGRAM

VDD

GND

PMD

GND

RSI

CLDA

LDA MONITOR

+3..+5.5V

0.68..

LDA

Low V(LDA)

NERR

LVDS/TTL

IMON

AVG

i(RSI)x540

RSI

100 nF..

CIS

suitable laser diode configurations

..300mA

NSLP

OverTemp.

SYN

AGND

OUTPUT MONITOR

CVDD

..300mA

ECI

RSI

LDK

RGND

x240

VDD

INPUT INTERFACE

PMD

REF

RMD

Bandgap, Reference, Overtemp

VDD

RVDD

VSY

OverCurrent

RMD

TTL

ECI

T.PAD

9kΩ

REGE

CID

100 nF..

..10 nF..

iC-NZN

OUTPUT DRIVER

Summary of content (17 pages)

PAGE 1
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 1/17 FEATURES APPLICATIONS ♦ Peak value controlled laser diode driver for operation from CW up to 155 MHz ♦ Spike-free switching of laser currents of up to 300 mA ♦ Setting of laser power (APC) via external resistor ♦ Optional current control (ACC) ♦ Laser current limitation ♦ LVDS/TTL switching input with TTL monitor output ♦ Low current consumption sleep-mode < 50 µA ♦ Safety shutdown with overtemperature ♦ Error signal output with overtemperature, undervolt
PAGE 2
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 2/17 DESCRIPTION Laser diode pulse driver iC-NZN allows CW operation of laser diodes and spike-free switching with defined current pulses up to 155 MHz. The optical output power of the laser diode is set-up by means of an external resistor (RMD/PMD). For laser current control without a monitor diode, the laser current monitor at pin IMON is utilised. For high pulse frequencies the device can be switched into controlled burst mode.
PAGE 3
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 3/17 PACKAGE DIMENSIONS All dimensions given in mm. RECOMMENDED PCB-FOOTPRINT 3.80 2.49 15 R0. TOP 0.30 0.70 0.50 0.25 0.40 3.80 0.90 2.49 SIDE BOTTOM 2.45 4 2.45 4 0.
PAGE 4
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 4/17 ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Item No. Symbol Parameter Conditions Unit Min. Max. G001 VDD Voltage at VDD -0.
PAGE 5
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 5/17 ELECTRICAL CHARACTERISTICS Operating Conditions: VDD = 3...5.5 V, VSY = 0 V...VDD, Tj = -20...125 ◦ C, NSLP = hi, CID = lo; unless otherwise stated Item No. Symbol Parameter Conditions Unit Min. Typ. Max. Total Device 001 VDD Permissible Supply Voltage 002 VSY Permissible Supply Voltage at VSY VSY ≤ VDD 3 5.5 V 3 5.
PAGE 6
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 6/17 ELECTRICAL CHARACTERISTICS Operating Conditions: VDD = 3...5.5 V, VSY = 0 V...VDD, Tj = -20...125 ◦ C, NSLP = hi, CID = lo; unless otherwise stated Item No. Symbol Parameter Conditions Unit Min. 309 Vt()lo Input Threshold Voltage lo at TTL, REGE, NSLP, AVG, CID 0.8 310 Vhys() Hysteresis at TTL, REGE, NSLP, AVG, CID 140 311 Ipu() Pull-Up Current at TTL, REGE 312 Ipd() Pull-Down Current at NSLP, AVG, V() = 1 V...
PAGE 7
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 7/17 ELECTRICAL CHARACTERISTICS: DIAGRAMS I(LED) tr tf I pk V 90% I pk Input/Output VDD−0.45V Vt()hi Vt()lo 0.
PAGE 8
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 8/17 DESCRIPTION OF FUNCTIONS iC-NZN is a laser diode pulse driver.
PAGE 9
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 9/17 External capacitor mode In applications where an external capacitor is required (see best performance recommendations below), the external capacitor mode must be enabled (pin CID = high). This connects the capacitor to the control circuit and additionally enables a pull-down current at pin CI to prevent this capacitor from being charged due to residual currents (cf. Electrical Characteristics No. 406).
PAGE 10
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 10/17 RVDD +3..+5.5V VDD CVDD RSI NSLP 0.68.. 9kΩ REGE 100 nF.. LDK AVG ..300mA 1 & VSY REF SYN + CI x240 CI - LVDS/TTL ECI + - EN TTL P IMON VDD & EP CLDA iC-NZN LDA MONITOR 100 nF.. RMD LDA i(RSI)x540 RSI PMD CIS ..10 nF.. AGND VDD MD CID ECI OUTPUT DRIVER INPUT INTERFACE NERR OverTemp. OverCurrent Low V(LDA) 1 T.
PAGE 11
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 11/17 LASER CURRENT LIMITATION RSI @ VDD LDA VDD CLDA CVDD i(RSI)x540 100 nF.. RSI RSI 100 nF.. 0.5V 0.68..9 kΩ When dimensioning resistor RSI the following applies (cf. Electrical Characteristics No. 106): + - VDD-0.5V LDA current limitation iC-NZN monitors the average laser current flowing from pin LDA (Figure 6). The DC current limit is set by means of a resistor at pin RSI. Imax (LDA) = 540 × NSLP NERR Overcurrent 1 0.
PAGE 12
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 12/17 CURRENT CONTROL The iC-NZN also supports laser current control, when no monitor diode is present. For that purpose, a fraction of the current flowing through the laser diode is provided at IMON pin (ILDK / 240, cf. Electrical Char- acteristics No. 407). Tables 7 and 8 show how to set the inputs for laser control depending on the input interface selected (TTL or LVDS).
PAGE 13
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 13/17 PMD RMD RVDD +3..+5.5V VDD CVDD LDA i(RSI)x540 RSI RSI NSLP 0.68.. 9kΩ REGE CLDA iC-NZN LDA MONITOR 100 nF.. 100 nF.. IMON VDD LDK & AVG ..300mA 1 & + VSY REF SYN CI - LVDS/TTL EP ..10 nF.. CIS ECI + EN CI x240 - AGND VDD TTL MD CID ECI OUTPUT DRIVER INPUT INTERFACE NERR OverTemp. OverCurrent 1 Bandgap, Reference, Overtemp Low V(LDA) T.
PAGE 14
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 14/17 ..12V CL RVDD +3..+5.5V VDD CVDD i(RSI)x540 RSI RSI 0.68.. 9kΩ iC-NZN LDA MONITOR 100 nF.. NSLP 100 nF.. IMON VDD LDK REGE & AVG ..300mA 1 & VSY REF SYN EP PMD RMD LDA + CI - LVDS/TTL ECI + EN CI x240 - CIS ..10 nF.. AGND VDD TTL MD CID ECI OUTPUT DRIVER INPUT INTERFACE NERR OverTemp. 1 GND T.
PAGE 15
J1-LVDS_N 11 JP11 JP12 J1-LVDS_P 9 J1-TTL 3 J1-GND6 12 J1-GND5 10 J1-GND4 8 J1-GND3 5 J1-GND2 4 J1-GND1 2 J1-GND 1 J1-V5D 6 1 2 JP9 BURST R4 opt JP8 AVG 19 RSI 1 VDD U1 iC-NZN GND GND2 NERR CID TTL EN JP10 LVDS 9 VSY VSY 21 GND 23 NERR 5 CID 8 TTL 7 EN 6 EP 10 SYN 2 AVG AVG EP 3 JP7 ON 20 REGE C7 100nF JP6 Cext 22 NSLP R2 2.74k JP4 ILIM OFF REGE JP5 VSY NSLP 2 1 R3 1k D3 RD SYN C2 opt 3 C1 100nF VDD VDD + - & 1 Low V(LDA) OverTemp.
PAGE 16
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 16/17 Figure 11: Evaluation board (component side) iC-Haus expressly reserves the right to change its products and/or specifications. An info letter gives details as to any amendments and additions made to the relevant current specifications on our internet website www.ichaus.de/infoletter; this letter is generated automatically and shall be sent to registered users by email.
PAGE 17
iC-NZN N-TYPE LASER DIODE DRIVER Rev C1, Page 17/17 ORDERING INFORMATION Type Package Order Designation iC-NZN QFN24 4 mm x 4 mm Evaluation Board iC-NZN QFN24-4x4 iC-NZN EVAL NZN1D For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Tel.: +49 (0) 61 35 - 92 92 - 0 Fax: +49 (0) 61 35 - 92 92 - 192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com Appointed local distributors: http://www.ichaus.