전자부품 데이터시트 검색엔진 |
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LB1980H 데이터시트(PDF) 6 Page - Sanyo Semicon Device |
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LB1980H 데이터시트(HTML) 6 Page - Sanyo Semicon Device |
6 / 7 page LB1980H No.5974-6/7 VLIM=5V CTLREF: OPEN Gm1=0.58A / V typ 2.10V typ Control Characteristics VCTL 0 123 4 5 VCTL=5V CTLREF: OPEN Control Limiter Characteristics VLIM 01 2 3 4 200mA / V typ Slope: 0.50A / V typ Continued from preceding page. Pin No. Pin Name Function Equivalent circuit 11 CTL Speed control input. The control implemented is fixed current drive controlled by current feedback from Rf. Gm=0.58 / V (typical) when Rf=0.5W 12 CTLREF Control reference voltage. While this pin is set to about 0.43 ×VCC internally, this voltage can be modified by applying a voltage from a low-impedance circuit. (The input impedance is about 4.3k Ω). 13 LIM Current limiter function control. The output current can be varied linearly by applying a voltage to this pin. The slope is 0.5A / V (typical) when Rf=0.5 Ω. CTL CTLREF VCC VCC VCC 7.5k Ω 10k Ω 200 Ω 200 Ω LIM 200 Ω 100 µA 200 µA max 11 13 12 15 16 17 18 19 20 UIN+ UIN- VIN+ VIN- WIN+ WIN- U phase Hall element inputs. Logic high is defined as states where IN+>IN-. V phase Hall element inputs. Logic high is defined as states where IN+>IN-. W phase Hall element inputs. Logic high is defined as states where IN+>IN-. 200 Ω 100 µA 200 Ω (+) input 19 17 15 (--) input 20 18 16 21 VCC Power supply for all internal blocks other than the output block. This voltage must be stabilized so that noise and ripple do not enter the IC. Truth Table and Control Functions Hall input Source → Sink U V W FR Phase V → Phase W H 1 Phase W → Phase V H H L L Phase U → Phase W H 2 Phase W → Phase U H L L L Phase U → Phase V H 3 Phase V → Phase U H L H L Phase W → Phase V H 4 Phase V → Phase W L L H L Phase W → Phase U H 5 Phase U → Phase W L H H L Phase V → Phase U H 6 Phase U → Phase V L H L L Note: Since the drive technique adopted is a 180 ° technique, phases other than the sink and source phase do not turn off. Control Function and Current Limiter Function Note: In the FR column, “H” refers to a voltage of 2.75V or higher, and “L” refers to 2.25V or lower (when VCC=5V.) Note: In the Hall input column, “H” refers to the state in the corresponding phase where the +input is at a potential at least 0.01V higher than the -input, and “L” refers to the state where the -input is at a potential at least 0.01V higher than the +input. |
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