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PDF iC-WK Data sheet ( Hoja de datos )
| Número de pieza | iC-WK | |
| Descripción | 2.4V CW LASER DIODE DRIVER | |
| Fabricantes | iC-Haus | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de iC-WK (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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iC-WK
2.4V CW LASER DIODE DRIVER
FEATURES
° CW operation up to 60mA from 2.4..6V supply voltage
° Rapid soft start after power-on
° Simple power adjustment via the external resistor
° Control loop accuracy better than 1% with changes in
temperature, supply voltage and load current
° Integrated reverse polarity protection for the iC and laser
diode
° Strong suppression of transients with very small external
capacitors
° Integrated flyback path protects against transients
° Permanent shutdown with excessive temperature and
overcurrent (i.e. if the laser diode is damaged or the
feedback current path fails)
° Two feedback inputs permit all current LD types to be used
(M/P/N configurations)
° Modulation via the feedback inputs is possible
° Wide monitor current range from 10µA to 2.5mA
° Extended temperature range available as an option
Rev A1, Page 1/12
APPLICATIONS
° Battery-powered LD modules
° LD Pointers
PACKAGES
(MSOP8)
SO8
BLOCK DIAGRAM
+2.4..+5.5V
6 VCC
CVCC
...47nF...
TRANSIENT
PROTECTION
1
D
LDA 7
CLDA
..1µF..
MDK 4
- MDA 5
+
VREF
0.5V
CI 2
LDK 8
MD LD
NQ
R
iC-WK
OVER CURRENT
OVER TEMP.
CI RM
200 ..50k
..100nF..
GND
1 GND
AGND 3
suitable laser diode configurations: N, P, M
MD LD
MD LD
LD
MD
© 2000
1 page  
iC-WK
2.4V CW LASER DIODE DRIVER
Rev A1, Page 5/12
ELECTRICAL CHARACTERISTICS
S SOperating Conditions: VCC= 2.4..5.5V, RM= 200 ..50k , Tj= -40..125°C unless otherwise noted
Item Symbol Parameter
Conditions
Tj Fig.
°C
Min.
Total Device
001 VCC
Permissible Supply Voltage
2.4
002 I(LDK) Permissible Laser Drive Current power control range
5
003 Idc(VCC) Supply Current
without load path
closed control loop, I(MDK)= 0,
SRM= 200 , I(LDK)= 60mA
004 Ioff(VCC) Supply Current on Reset
005 Ir(VCC) Reverse Supply Current
006 ton()
Turn-on Delay
RM= 50kS
ÜVCC: 0V 5V to 95% I(LDK);
I(LDK)= 60mA, CI= 47nF
I(LDK)= 60mA, CI= 100nF
-6
E001 Vc()hi
Clamp Voltage hi at
VCC, LDA, MDK
I()= 10mA, other pins open
6
E002 Vc()hi Clamp Voltage hi at LDK
V()< VCC+1V; I()= 10mA,
other pins open
6
E003 Vc()hi Clamp Voltage hi at MDA
I()= 10mA, other pins open
1.4
E004 Vc()hi Clamp Voltage hi at CI
I()= 10mA, other pins open
1.1
E005 Vc()lo
Clamp Voltage lo at
VCC, LDA, MDK, MDA, CI
I()= -10mA, other pins open
-9
Reference and Monitor Inputs MDA, MDK, AGND
101 V(MDA) Reference Voltage at MDA
closed control loop,
V(LDK) >Vs(LDK)
480
102 dV(MDA) Reference Voltage Temperature see 101;
Drift at MDA
103 Ierr(MDA) Input Current in MDA
closed control loop,
I(MDK)= 0, I(LDK)= 20..60mA
-300
104 dI(MDA) Input Current Temperature Drift
in MDA
105 APCerr Control Error
106 dI(RM) Supply Voltage Suppression
see 103;
SRM= 10k , Tj= 0..70°C
SRM= 10k , Tj= -25..85°C
ÜV(VCC): 2.4V 5.5V,
I(LDK)= 60mA
-2
-1
107 Rgnd() Resistor AGND-GND
301 Vf(MDK) Voltage at MDK
Vf()= V(LDA) -V(MDK);
I(MDK)= 1µA..1mA
0.55
302 CR()
Current Ratio I(MDA) / I(MDK) I(MDK)= 10µA..1mA
0.98
303 TC()
Current Ratio Temperature
Coefficient I(MDA) / I(MDK)
-0.005
Laser Drive LDA, LDK
201 Vs(LDK) Saturation Voltage at LDK
I(LDK)= 40mA
I(LDK)= 60mA
202 dI(LD) Load Balancing Error
I(LD)= 20mA,
ÜI(LDK): 20mA 60mA
-1
203 It(LDK) Overcurrent Threshold in LDK
60
204 toff()
Overcurrent Reset Delay
lack of feedback:
I(RM)= 0 to I(LDK)= It(LDK);
I(LDK)= 20mA, CI= 47nF
I(LDK)= 20mA, CI= 100nF
I(LDK)= 60mA, CI= 47nF
I(LDK)= 60mA, CI= 100nF
Typ.
2.4
-3
500
130
Max.
Unit
5.5 V
60 mA
5.5 mA
5 mA
mA
70 µs
150 µs
9V
9V
4V
3.5 V
V
530 mV
120 µV/°C
300 nA
2 nA/°C
0.3 %
1%
1%
3S
2V
1.02
+0.005 %/°C
300 mV
400 mV
1%
300 mA
85 µs
170 µs
60 µs
130 µs
5 Page 
iC-WK
2.4V CW LASER DIODE DRIVER
+V
C2
n/a
-V
GND
C3
100nF
J
I
2 CI
3 AGND
+
0.5V
-
LDK 8
LDA 7
6
VCC
C4
n/a
C1
1µF
LK
C
PD
4 MDK
iC-WK
MDA 5
R1
4.7k
P1
10k
Fig. 15: schematic diagram of demo board WK2D for N-type laser diodes
Rev A1, Page 11/12
Fig. 16: demo board WK2D (top side)
Fig. 17: demo board WK2D (bottom side)
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet iC-WK.PDF ] | |
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