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BD7902CFS датащи(PDF) 11 Page - Rohm |
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BD7902CFS датащи(HTML) 11 Page - Rohm |
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11 / 18 page ![]() BD7902CFS Optical disc ICs 11/17 ! ! ! ! Table of measure circuit switches position 2 (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) Spindle driver block 〈 Torque command 〉 〈 Hall bias 〉 〈 Hall amplifier 〉 VHB gmSP RONUSP RONLSP ILIMSP fosc 1.65V 1.85 ∗4 3.3V 3.3V 3.3V H H H H H H H L H H H H 2 2 2 1 1 1 1 1 1 2 2 1 1 1 1 1 VDZSP ∗3 H L 2111 1 1 1 2 2 111 IHIB 1.65V H H 1111 Designation INPUT VIN SWITCH CTL 12 RL SP SL IL Measure point Conditions ∗2 Check VRNF with no output at VIN=VC±20mV Check VRNF with output at VIN =VC±90mV See 15 of 20 IHB =10mA Current flowing in each terminal at H −=2.5V, HW +=2.7V (2.3V), HV=2.5V ILSP =500mA ILSP =−500mA RON = 0.5A 12V − VOSP RON = 0.5A VOSP Pin 7 〈 FG 〉 VFGL 1.65V H H 1111 HW +=2.6V VFGH 1.65V H H 1111 HW +=2.4V VFG VFG IU + (−), IV + (−), IW + (−) VSPRNF VSPRNF VSPRNF OUTU, V, W OUTU, V, W VOSPU HU + HV + HW + U V W Condition Measure point 2.4V 2.6V 2.6V Source Hi-Z Sink VOSPU IOSPU =500mA 2.6V 2.4V 2.6V Sink Source Hi-Z VOSPV IOSPV =500mA 2.6V 2.6V 2.4V Hi-Z Sink Source VOSPW IOSPW =500mA 2.6V 2.4V 2.4V Sink Hi-Z Source VOSPU IOSPU =−500mA 2.4V 2.6V 2.4V Source Sink Hi-Z VOSPV IOSPV =−500mA 2.4V 2.4V 2.6V Hi-Z Source Sink VOSPW IOSPW =−500mA ∗5 Condition of input |
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