SM8610 Nippon_Precision_Circuits America, SM8610 Datasheet
SM8610
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SM8610 Summary of contents
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... OVERVIEW The SM8610CV is a portable CD player laser driver IC. It uses a laser switching drive that reduces the laser power dissipation, thereby reducing data read current consumption and extending battery life significantly, when compared with existing devices which use a constant-current laser control method with corresponding high dissipation which places limits on battery life ...
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... BLOCK DIAGRAM LDOFF FLOCK DMUTE Processor PCK 2 multiplier DUTYADJ Duty rate adjustor R DUTY GND SM8610CV Pulse control logic Laser diode driver Feedback V-I amplifier RG1 RG2 NIPPON PRECISION CIRCUITS INC.—2 VCC LDISET R LD Pick-up LDIOUT PDVIN ...
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... Laser drive state L Laser switching drive H Laser constant-current drive FLOCK Laser drive state L Laser constant-current drive H Laser switching drive LDOFF Laser drive state Laser drive OFF L In this state, the SM8610CV is in power-save mode. H Laser drive ON NIPPON PRECISION CIRCUITS INC.—3 ...
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... IHFLOCK FLOCK LOW-level voltage V ILFLOCK FLOCK HIGH-level sink current I HFLOCK MUTE HIGH-level voltage V IHDMUTE MUTE LOW-level voltage V ILDMUTE MUTE HIGH-level sink current I HDMUTE SM8610CV Rating Unit − 0.5 to 7.0 V − − 3 3.0 mA − ° C − 125 ° ...
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... Test level I 100% of devices tested at 25°C Test level II Samples tested only Test level III Specifications guaranteed according to design and evaluation tests. Test level IV Parameter typical values only guaranteed. SM8610CV Condition min – 13 8.6 LDOFF HIGH → LOW – LDOFF LOW → HIGH – ...
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... L Note) × : Don’t care. Pulsewidth Adjust and Frequency Multiplication Function The SM8610CV internal waveform processor multiplies the PCK input signal frequency by 2, and the pulse- width of this signal can be adjusted to control the duty ratio. PCK I(LDIOUT) The output pulse current (LD chopper signal) on LDIOUT is automatically adjusted to maintain roughly con- stant duty ratio, even for changes in frequency ...
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... APC Loop Cutoff Frequency Setting The APC loop cutoff frequency fc is determined by the external resistance R nected between RG1 and RG2 connected between RG2 and VCC, the cutoff frequency is given as follows. G SM8610CV 800[V] × 1000 = = I LDSET R LD − ...
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... Open loop gain and LDIOUT maximum output current (R 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0.00 0 0.05 0.1 0.15 PDVIN [V] SM8610CV = 2.5kΩ 2.5kΩ DUTY G Output duty ratio (C = 0.01µF) G 100 1000000 1.00E+06 0.2 0.25 0.3 0.35 0.4 R DUTY R DUTY R DUTY 1.00E+07 1.00E+08 1.00E+09 frequency [Hz] = 20Ω) LDIOUT SM8610 LDIOUT R LDIOUT NIPPON PRECISION CIRCUITS INC.—8 = 3kΩ = 5.6kΩ = 15kΩ ...
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... Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. SM8610CV NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome, Koto-ku, ...