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| iC-WJ, IC-WJZ APPLICATION NOTES Sep 19 2000, Page 1/3 LASER DIODE OUTPUT WAVEFORMS Fig. 1: the lowest operating frequency permitted is determined by a limit of 10% max. overshooting Fig. 2: setup ok, the time constant given by RSET x CI suits the operating frequency ideal Fig. 3: switch delay on leading edge starts to effect the duty cycle and thus the pulse power TYPICAL OPERATIONAL CHARACTERISTICS (taken on iC-WJ) Operating Conditions: VCC= 5V, Tj= 25EC, unless otherwise noted Item Symbol Parameter Conditions Tj Fig. Min. Typ. Max. Unit EC CW Operation (IN= VCC) 1 2 3 Operating Frequency (50% duty cycle) 4 5 6 7 8 9 10 11 12 13 14 15 f(IN) Clock Frequency at IN CI, RSET, CWD: 100nF, 15k, - pF see #4 see #4 220nF, 15k, -pF see #7 see #7 470nF, 15k, 100pF see #10 see #10 4.7F, 15k, 1000pF see #13 see #13 1 2 3 1 2 3 1 2 3 1 2 3 ton() Power-on Delay CI, RSET, CWD: 22nF, 15k, -pF 470nF, 15k, 100pF 4.7F, 15k, 1000pF 0.54 11 120 ms ms ms 65 150 400 30 120 150 400 10 60 100 400 1.8 30 100 350 250 250 250 kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz kHz iC-WJ, IC-WJZ APPLICATION NOTES Sep 19 2000, Page 2/3 TYPICAL OPERATIONAL CHARACTERISTICS (taken on iC-WJ) Operating Conditions: VCC= 5V, Tj= 25EC, unless otherwise noted Item Symbol Parameter Conditions Tj Fig. Min. Typ. Max. Unit EC Operating Frequency (25% duty cycle) 16 17 18 Operating Frequency (10% duty cycle) 19 20 21 Laser Diode Power Delay 22 23 tp(LD)on Light Power Delay tp(LD)off IN: lo|hi until 90% Popt IN: hi|lo until 10% Popt f(IN) Clock Frequency / Pulse Width at IN 1F, 100k, 1nF see #19 see #19 1 2 3 f(IN) Clock Frequency / Pulse Width at IN 470nF, 50k, - pF see #16 see #16 1 2 3 40 6.2 50 5 100 2.5 80 kHz s kHz s kHz s 5 10 10 5 50 2 30 kHz s kHz s kHz s 230 90 ns ns iC-WJ, IC-WJZ APPLICATION NOTES Sep 19 2000, Page 3/3 C1 10F R1 12 C3 5nF LD MD 1 GND KLD AMD 8 2 CWD CI 100nF 3 WDOG CI REF ISET iC-WJ/WJZ VCC IN 7 +5V R5 5 C2 100nF R6 R10 +5V + R7 eg. RSET x10 modulation depth R11 +5V R8 100 IN +5V R9 50 6 RSET 10k 4 Fig. 1: applying external HF modulation Fig. 2.: supplying higher output currents |
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