View IC-HK_4962968.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Copyright (c) 2009 iC-Haus

MDA MDK LDA CI
155 MHz LASER SWITCH
IC-HK, IC-HKB
FEATURES
BLOCK DIAGRAM
o o o o o
o o o o o o o o
Laser switch for frequencies from CW up to 155 MHz Spike-free switching of the laser current Dual switching inputs with independent current control Operates as a voltage-controlled current source Pulsed operation with up to 700 mA per channel CW operation with up to 150 mA per channel Simple power control at pin CI Control to the mean of the laser power in conjunction with iC-WK/L (CW laser diode driver) Supplement to iC-WK/L for pulsed operation Thermal shutdown Protective ESD circuitry IC-HKB for driving blue laser diodes Option: extended temperature range
iC-WK
7
5
4
2
CI
RM
M/N
8
CLDA
P
CI
IC-HK/B
OVERTEMP. SHUTDOWN
M1
MD LD
AGND1
2
RK1
3
LDK
M2
AGND2
4
RK2
VDD
GND
6
7
EN2
EN1
PACKAGES
APPLICATIONS
o Data transmission o Laser scanning devices o Optical storage devices
5
1
SO8 thermal pad
Operation with constant current (uncontrolled):
Suitable laser diode configurations:
Operation in conjunction with iC-WK (power controlled):
MD
LD
MD LD
MD LD
M
P
N
http://www.ichaus.com
Rev F1, Page 1/8
MSOP8 thermal pad
LD
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 2/8 DESCRIPTION Laser Switch IC-HK/B enables the spike-free switching of laser diodes with well-defined current pulses at frequencies ranging from DC to 155 MHz. The diode current is determined by the voltage at pin CI and by the resistors RK1 and RK2. The two fast switches are controlled independently via CMOS inputs EN1 and EN2. The laser diode can thus be turned on and off or switched between different current levels defined by the ratio of RK1 and RK2. Each channel can be operated on 150 mA DC and up to 700 mA pulsed current depending on the frequency, duty cycle and heat dissipation. The integrated thermal shutdown feature prevents damage from excessive temperature. IC-HK/B supplements the laser diode driver iC-WK which uses the monitor current of the laser diode to control the laser power. iC-WK therefore controls the voltage at pin CI in such a way that the mean value of the emitted laser power is constant (APC), providing there is a constant duty cycle and a switching frequency higher than 100 kHz.
+3.5..5 V
CLDA LD 3 7 LDK VDD
IC-HK/B
8
CI
M1 M2
EN1
1
EN2
V(CI)
5
OVERTEMP.- SHUTDOWN
AGND1 2 RK1
AGND2 GND 4 RK2 6
Figure 1: Operation as a voltage-controlled current source
6 +3.5..5 V CVCC 100 nF
VCC
LDA CLDA 1 uF CLD 2.2 nF CVDD 100 nF
TRANSIENT PROTECTION
MDK
LED MD LD
- +
VREF 0.5 V 1
MDA
3 LDK
7 VDD
CI D LDK
8
CI
IC-HK/B
M1
M2
NQ R
iC-WK
RM
EN1
1
EN1
CM
CI 47 nF..
EN2
5
EN2
OVER CURRENT
1 GND
FEEDBACK MON./ OVERTEMP.
AGND
200 ..50 k
OVERTEMP.- SHUTDOWN AGND1 AGND2 4 GND 6
RGND
DGND 2
0V
RK1 0..
RK2 0..
Figure 2: Operation of IC-HK/B in conjunction with CW driver iC-WK (see application information on optional parts/connections)
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 3/8 PACKAGES SO8tp, MSOP8tp to JEDEC PIN CONFIGURATION SO8tp PIN FUNCTIONS No. Name Function
8
1
EN1
2 7
CI VDD
AGND1
3
6
LDK
4
GND
5
AGND2
EN2
1 2 3 4 5 6 7 8
EN1 AGND1 LDK AGND2 EN2 GND VDD CI
Channel 1 Switching Input Channel 1 Reference Ground Driver Output (LD Cathode) Channel 2 Reference Ground Channel 2 Switching Input Ground +5 V Supply Voltage Voltage Reference for Current Control
PIN CONFIGURATION MSOP8tp
Code... ...yymm
1
HK
The Thermal Pad is to be connected to a Ground Plane on the PCB.
EN1 AGND1 LDK AGND2
CI VDD GND EN2
IC-HK Code
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 4/8 ABSOLUTE MAXIMUM RATINGS
Beyond these values damage may occur; device operation is not guaranteed. Item No. Symbol Parameter Voltage at VDD Current in VDD Voltage at CI Current in LDK Current in AGND1 Current in AGND2 Voltage at EN1, EN2, AGND1 and AGND2 Voltage at LDK Susceptibility to ESD at all pins Operating Junction Temperature Storage Temperature Range IC-HK IC-HKB HBM, 100 pF discharged through 1.5 k -40 -40 DC current DC current DC current Conditions Min. -0.7 -10 -0.7 -10 -150 -150 -0.7 -0.7 -0.7 Max. 6 150 6 300 10 10 6 6 15 1 150 150 V mA V mA mA mA V V V kV C C Unit
G001 VDD G002 I(VDD) G003 V(CI) G004 I(LDK) G005 I(AGND1) G006 I(AGND2) G007 V() G008 V(LDK) G009 Vd() G010 Tj G011 Ts
THERMAL DATA
Operating Conditions: VDD = 3.5...5.5 V Item No. T01 T02 Symbol Ta Rthja Parameter Operating Ambient Temperature Range (extended range on request) Thermal Resistance Chip/Ambient (SO8) Thermal Resistance Chip/Ambient (MSOP8) soldered to PCB, no additional cooling areas therm. pad soldered to approx. 2 cm cooling area soldered to PCB, therm. pad soldered to approx. 2 cm cooling area Conditions Min. -25 Typ. Max. 85 170 50 60 C K/W K/W K/W Unit
30 30
T03
Rthja
All voltages are referenced to ground unless otherwise stated. All currents into the device pins are positive; all currents out of the device pins are negative.
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 5/8 ELECTRICAL CHARACTERISTICS
Operating Conditions: VDD = 3.5...5.5 V, Tj = -25...125 C unless otherwise stated Item No. 001 002 003 004 005 006 007 008 009 101 102 107 Symbol Parameter Conditions Tj C Fig. Min. 3.5 CW operation pulsed operation, f(EN1, EN2) = 150 MHz IC-HK IC-HKB Vc(CI) = V(CI) - VDD, I(CI) = 10 mA, other pins open Vc(EN) = V(EN) - VDD, I(EN) = 1 mA, other pins open I() = -10 mA, other pins open 0 0 0 0 0.4 0.4 -1.25 1 110 Typ. Max. 5.5 80 150 5.5 12 1.25 1.25 -0.4 5 150 150 f > 100 kHz, thi/T < 1:10 I(LDK) = 40 mA I(LDK) = 60 mA I(LDK) = 150 mA, IC-HK I(LDK) = 150 mA, IC-HKB ENx = lo, V(LDK) = VDD Iop = 150 mA, I(LDK): 10% 90%Iop Iop(LDK) = 150 mA, I(LDK): 90% 10%Iop ENx hi lo, V(50%) I(50%) 3 3 1 33 0 I(LDK) < 5 mA V(CI) = 0...VDD, I(LDK) = 30...300 mA, RK1 = RK2 0.75 0.9 1 50 0 700 1.2 1.3 1.5 1.8 10 1.5 1.5 3 67 5.5 1.15 1.1 V A mA V V V V V A C mA mA V V V V A ns ns ns %VDD V V Unit
Total Device VDD I(VDD) I(VDD) V(LDK) Vc(CI)hi Vc(EN)hi Vc()lo Ipd() Toff Icw(LDK) Ipk(LDK) Vs(LDK) Permissible Supply Voltage Supply Current in VDD Supply Current in VDD Permissible Voltage at LDK Clamp Voltage hi at CI Clamp Voltage hi at EN1, EN2 Clamp Voltage lo at VDD, LDK, CI, EN1, EN2, AGND1, AGND2 Pull-Down Current at CI, EN1, EN2 Overtemperature Shutdown Permissible CW Current in LDK (per channel) Permissible Pulsed Current in LDK (per channel) Saturation Voltage at LDK
Laser Control LDK, CI, EN1, EN2
108 109 110 111 112 113 114 115
I0(LDK) tr() tf() tp() Vt(ENx) V(CI) Vt(CI) CR()
Leakage Current in LDK LDK Current Rise Time LDK Current Fall Time Propagation Delay V(ENx) I(LDK) Input Threshold Voltage Permissible Voltage at CI Threshold Voltage at CI Current Matching Channel1/Channel2
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 6/8 ELECTRICAL CHARACTERISTICS DIAGRAMS
I(LDK)
300 mA
RKx= 0
250
I(LDK) tr I op
90 % I op
100
tf
200
RKx= 1
RKx= 2
150
RKx= 3 RKx= 4 RKx= 5 RKx= 6 RKx= 8 RKx= 10
50
RKx= 15 RKx= 20 RKx= 30 RKx= 50

10 % I op
0
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6 V
t
V(CI)
Figure 3: Laser current pulse in LDK
Figure 4: Diode current vs. V(Cl) at Tj = 27 C
I(LDK)
700 mA 600
RKx = 0
I(LDK)
1200 mA
RKx = 0
1000
500
RKx = 1
400
RKx = 2
800
RKx = 1
300 200 100 0 2.2
RKx = 3 RKx = 4 RKx = 5 RKx = 6 RKx = 8 RKx = 10 RKx = 15 RKx = 20 RKx = 30 RKx = 50
600
RKx = 2 RKx = 3 RKx = 4 RKx = 5 RKx = 6 RKx = 8 RKx = 10 RKx = 15 RKx = 20 RKx = 30 RKx = 50
400
200
2.4
2.6
2.8
3
3.2
3.4
3.6
3.8V
V(CI)
0 3.5
4
4.5
5V
V(CI)
Figure 5: Diode current vs. V(Cl) at Tj = 27 C
Figure 6: Diode current vs. V(Cl) at Tj = 27 C
I(LDK)
I(LDK)
250 mA
1.5 A
200
1
RKx = 0 max
RKx = 0
150
max
0.5
100
min
min
50
0
0
0
0.5
1
1.5
2
0
1
2
3
4
5V
V(CI)
V(CI)
Figure 7: Diode current variation vs. V(CI) at V(LDK) = 3 V
Figure 8: Diode current variation vs. V(CI) at V(LDK) = 3 V
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 7/8 DESCRIPTION OF FUNCTIONS Laser current dependency of V(Cl), RK1, RK2 Depending on the laser diode different diode currents are necessary to obtain the required laser power. The values for V(CI), RK1 and RK2 can be determined for the required diode current at room temperature from the opposite diagram. A parallel to the x axis must be drawn through the desired diode current. Either RKx can be obtained for a required value of V(CI) or the respective value of V(VI) can be achieved for a given RKx.
I(LDK)
300 mA
RKx= 0 2
250
RKx= 1
200
RKx= 2
150
1
RKx= 3 RKx= 4 RKx= 5 RKx= 6 RKx= 8 RKx= 10
100
50
RKx= 15 RKx= 20 RKx= 30 RKx= 50

Thermal Shutdown IC-HK/B is protected by an integrated thermal shutdown feature. When the shutdown temperature is reached both channels are locked.
0
1
1.2
1.4
1.6 3
1.8
2
2.2
2.4
2.6 V
Figure 9: Diode current vs. V(Cl) at Tj = 27 C
1.75
V(CI)
APPLICATION NOTES Application notes for IC-HK are available as a separate document.
iC-Haus expressly reserves the right to change its products and/or specifications. An Infoletter 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. 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. As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in technical applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the range of use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade statistics issued annually by the Bureau of Statistics in Wiesbaden, for example, or to any product in the product catalogue published for the 2007 and following exhibitions in Hanover (Hannover-Messe). We understand suitable application of our published designs to be state-of-the-art technology which can no longer be classed as inventive under the stipulations of patent law. Our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our products can be put to.
IC-HK, IC-HKB
155 MHz LASER SWITCH
Rev F1, Page 8/8 ORDERING INFORMATION
Type IC-HK
Package SO8tp MSOP8tp SO8tp MSOP8tp
Order Designation IC-HK SO8 IC-HK MSOP8 IC-HKB SO8 IC-HKB MSOP8
IC-HKB
For technical support, information about prices and terms of delivery please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com
Appointed local distributors: http://www.ichaus.de/support_distributors.php

▲Up To Search▲

Price & Availability of IC-HK

	To Download IC-HK Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .