LB1824 データシートの表示（PDF） - SANYO -> Panasonic

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LB1824

Power Brushless Motor Driver for OA Equipment

SANYO -> Panasonic 

LB1824

P = P2 = 0.19 W

At start time:

P = P1 + P3 + P4 + P5 = 6.51 W

(for an output on duty of 100%)

16. Techniques for measuring the IC temperature increase

• Measurement with a thermocouple

When using a thermocouple to measure the IC temperature, the thermocouple should be attached to a fin. While

this measurement technique is simple, it is subject to large measurement errors if the IC is not in a stable heat

generation state.

• Measurement using the characteristics of an IC internal diode

We recommend using the parasitic diode between INT.IN and GND internal to the IC. (According to our data, ID

= 1 mA with about

1.8 mV/°C) Remove the external resistor when making the measurements.

17. Servo constants

When calculating the servo constants, they will be heavily dependent on the motor actually used. Since experience is

generally required, these constants should be determined by the motor manufacturer. We can provide the IC

characteristics data required for the servo constants calculations as well as frequency characteristics simulation data

for the filter constants set by the motor manufacturer.

If the resistor connected between DOUT and INT.IN (R10) is too small, C8 and C9 are too large, and R10 is too

large, speed errors will be likely to occur due to the speed discriminator cutoff current and the integrator input

current. Therefore, a 10 to 100 kΩ resistor should be used. If the resistor connected between POUT and INT.IN (R8)

is too small, the PLL system influence will become too large and the in-phase pull-in to locking will get worse.

Therefore, do not make this value too small. (We recommend 1 MΩ when R10 is 75 kΩ.) First set the constants just

for the speed discriminator system (R9, R10, C8 and C9) and then set the R8 value for the PLL system.

s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace

equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of

which may directly or indirectly cause injury, death or property loss.

s Anyone purchasing any products described or contained herein for an above-mentioned use shall:

ΠAccept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and

distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all

damages, cost and expenses associated with such use:

 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on

SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees

jointly or severally.

s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for

volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied

regarding its use or any infringements of intellectual property rights or other rights of third parties.

This catalog provides information as of September, 1997. Specifications and information herein are subject to

change without notice.

No. 4264-9/9

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