LB1692 データシートの表示（PDF） - SANYO -> Panasonic

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LB1692

Three-Phase Brushless Motor Driver

SANYO -> Panasonic 

Pin Functions

Pin

IN1+, IN1–

IN2+, IN2–

IN3+, IN3–

OUT1

OUT2

OUT3

VCC

VM

Rf

Pin No.

17, 18

15, 16

13, 14

5

6

7

1

10

2, 8

GND

11

FSR

12

FG1

20

FG2

19

LB1692

Function

OUT1: A logic high level indicates that the Hall device input pins are in the state IN+ > IN-.

OUT2: A logic high level indicates that the Hall device input pins are in the state IN+ > IN-.

OUT3: A logic high level indicates that the Hall device input pins are in the state IN+ > IN-.

Output pin 1

Output pin 2

Output pin 3

Power supply for all sections other than the output block

Power supply that provides the output power

Output current detection pin. The output current is converted to a voltage for detection by a resistor connected

between this pin and GND.

Ground for all sections other than the output block

The Rf pin voltage will be the lowest output transistor potential.

Forward/stop/reverse control pin

The voltage on this pin controls the IC forward, stop, or reverse operation.

Forward: 0 to 0.8 V

Stop: 2.1 to 2.9 V

Reverse: 4.2 to 5.0 V

Speed pulse output pin 1. A pull-up resistor is built in.

Speed pulse output pin 2. A pull-up resistor is built in.

1. Position Detection Circuit (Hall device input circuit)

The position detection circuit is a differential amplifier with hysteresis (typically 30 mV).

Voltages within the common mode input voltage range (1.5 V to VCC – 1.8 V) should be used as the operating DC level.

We recommend using an input level that is more than three times the hysteresis, i.e., on the order of 120 to 160 mVp-p.

2. Current Control Circuit

Current control is performed by switching the sink side transistor from the saturated to the unsaturated range.

Therefore, it is possible for ASO to be a problem.

I = VRf

(A)

Rf

Therefore, if at all possible, applications should be designed so that the current limiter does not operate. Also, be

especially careful to design applications so that the maximum output current (2.5 A) is not exceeded when the

current limiter operates. Note that a current limiter must be added to the VM power supply. (We recommend a current

limiter with a short delay time and with a design current that is about 60 to 70% of the current control circuit's

current value.)

3. Protection Circuits

• Low voltage protection circuit

The sink side output drivers are turned off if the VCC pin voltage falls below the stipulated range. This circuit is

provided to prevent incorrect operation.

• Thermal cutoff protection circuit

If the junction temperature exceeds the stipulated temperature range, the sink side output drivers are turned off.

This is identical to the operation of the circuit described in 3-1 above.

4. VM power supply minimum voltage

The VM power supply voltage should be greater than or equal to the VCC voltage.

VM ≥ VCC

5. FG Output Circuit

The position detection inputs IN1, IN2, and IN3 are combined and the output is generated using waveform shaping.

The frequencies of those outputs are proportional to the rotational speed signal, and, as seen from the position

detectors, are equal to the input frequency itself (FG1) and three times the input frequency (FG2).

No. 4844-4/5

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