LB1870M Sanyo Semiconductor Corporation, LB1870M Datasheet
LB1870M
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LB1870M Summary of contents
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... Ordering number : EN4356A Overview The LB1870 and LB1870M are three-phase brushless motor driver ICs that are optimal for LBP and LBF polygon mirror motor drive. Functions and Features • Single-chip implementation of all circuits required for LBP polygon mirror motor drive (speed control and driver circuits) • ...
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Allowable Operating Conditions 25°C Parameter Supply voltage range 6.3 V fixed voltage output current LD pin voltage FGS pin voltage LD pin output current FGS pin output current Electrical Characteristics 25°C, V Parameter Symbol ...
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Continued from preceding page. Parameter Symbol [Error amplifier] Input offset voltage V (ER) IO Input bias current I (ER bias level V (ER) B Output high level voltage V (ER) OH Output low level voltage V (ER) OL ...
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Pin Assignments (Top view) LB1870, 1870M (Top view) No. 4356-4/10 ...
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Pin Functions Symbol Function + IN1 Hall element input – IN1 to 3 OUT1 to 3 Outputs GND1 Sub-ground GND2 Ground R Output current detection f V Power supply CC V Power supply stabilization output REG OSC ...
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Sample Application Circuit Clock Divisor Switching Pin N1 Pin N2 Divisor H H 2560 (5 1 512 5120 (5 2 512 4096 (4 2 512 3072 (3 2 512) — M EXT. CLK Note: ...
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... GND1 (pin 11 in the LB1870, pin 5 in the LB1870M) .........................................Output block ground (sub-ground) GND2 (pin 28 in the LB1870, pins 20, 35, and 36 in the LB1870M)..Control circuit ground. GND1 and GND2 should be connected on the circuit board by the shortest distance that occurs in the pattern. Also, ...
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External interface pins • LD pin Output type: open collector Breakdown voltage absolute maximum Saturation voltage manufacturing variation reference value (I • FGS pin Output type: open collector Breakdown voltage absolute maximum Saturation voltage manufacturing ...
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Oscillator pin A crystal oscillator and an RC circuit is connected to the LB1870’s OSC pin. To avoid problems when selecting the oscillator and the capacitor and resistor values, confirm these values with the oscillator’s manufacturer. The pnp transistor ...
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Measuring the IC’s temperature rise • Thermocouple measurement When using a thermocouple for temperature measurement, attach the thermocouple to a heat sink fin. This temperature measurement technique is straightforward. However, a large measurement error occurs when the heat generation ...