LB1693 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1693

3-Phase Brushless Motor Driver

SANYO -> Panasonic 

VCC=5V, VM are No speed control

LB1693

1. Switching regulator oscillation circuit (PWM generation circuit)

1-1. Oscillation circuit (40 to 50kHz max.)

Figure 1 shows the oscillation circuit that generates the

triangular waves. The oscillation frequency for this circuit

is detemined by the following equation (with VH=7V typ.)

f= t0

1

+

(Hz)

t1

t0~0.56CR (charging)

t1~1.34CRN (discharging)

(RN is the internal resistance of 1.4kΩ approx.)

In actual applications, R >> RN is used to suppress the influence

of variation in the IC’s internal resistance.

Figure 1

Oscillation Circuit

No.3295-7/9

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