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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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BD7902CFS датащи(PDF) 10 Page - Rohm |
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BD7902CFS датащи(HTML) 10 Page - Rohm |
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10 / 18 page  BD7902CFS Optical disc ICs 10/17 ! ! ! ! Table of measure circuit switches position 1 (VCC=SPVM=SLVM=12V, DVCC=AVM=5V, VC=1.65V, RL (act) =8 Ω, RL (SL) =8Ω+47µH, RL (SP) =2Ω+47µH, SLRNF=0.5 Ω, SPRNF=0.33Ω, H−=2.5V, HU+=2.6V, HV+=HW+=2.4V) Circuit current Sled driver block IQ1 IQ2 IQ3 IST1 IST2 gmSL RONUSL RONLSL ILIMSL fosc − − − − − 1.45 *2 3.3V (0V) 3.3V (0V) 0V (3.3V) L L L L L L L H H H H H H H H H H H H H 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 VDZSL *1 H H 2111 1 1 1 2 2 111 111 111 111 111 Designation INPUT VIN SWITCH CTL 12 RL SP SL IL Measure point Conditions ∗1 Check VSLRNF with no output at VIN=VC±15mV Check VSLRNF with output at VIN =VC±65mV See bellow ILSL =500mA ILSL =−500mA RON = 0.5A VOSL + (−) RON = 0.5A 12V − VOSL + (−) IQVC IQVC IQDV IQVC IQDV VSLRNF VSLRNF VSLRNF OUT + (−) OUT + (−) VOSL + VIN2 VIN3 VRNF3/RNF VRNF2/RNF VRNF1/RNF lop VRNF4/RNF VIN4 VIN1 VIN Dead zone SPRNF =0.33Ω SLRNF =0.5Ω Iosp Iosl Iosp or Iosl Iop Time Iop...the peak current of Iosp or Iosl ∗2 Sled driver VIN1 =240mV, VIN2=140mV VIN3 =−140mV, VIN=−240mV gm ( +) = ( ) / 0.5 Ω 240mV − 140mV VSLRNF1 − VSLRNF2 gm ( −) = ( ) / 0.5 Ω 240mV − 140mV VSLRNF4 − VSLRNF3 ∗4 Spindle driver VIN1 =150mV, VIN2=100mV VIN3 =−100mV, VIN=−150mV gm ( +) = ( ) / 0.33 Ω 150mV − 100mV VSPRNF1 − VSPRNF2 gm ( −) = ( ) / 0.33 Ω 150mV − 100mV VSPRNF4 − VSPRNF3 |
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