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参数资料
| 型号： | LB1862M |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 0.5 A, PDSO10 |
| 封装： | 0.225 INCH, MFP-10 |
| 文件页数： | 5/7页 |
| 文件大小： | 128K |
| 代理商： | LB1862M |
LB1862M,LB1962M
PS No.5657-5/7
Design Reference
(1) VCC pin
Power supply pin for control block and motor drive.
Accepts a wide operation voltage range from 3.8 to 16.8V, for 5V/12V dual power supply support.
(2) OUT1, OUT2 pins
Single-phase coil output pins.
Bipolar drive output with upper side inverted and lower side single output. Built-in regenerative circuit regenerates
kickback current between lower side NPN outputs when a diode is used for protection against reverse connection.
(3) IN, IN+ pins
Hall input signal pins
The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of ±3.5mV (typ.).
The Hall input signal amplitude should be 70mV or more.
(4) CT pin
This pin serves for connecting a capacitor between CT and GND.
The capacitor determines the characteristics of the built-in lockup protection circuit for preventing coil burnout in the
case of motor restraint. Once normal motor load is restored, the automatic recovery circuit resets itself.
Changing the capacitance alters the lockup detection time.
When a 0.47 mF capacitor is connected between CT and GND
Lockup detection time
: approx. 0.5s
Lockup protection time/automatic recovery time
: approx. 0.16s (output ON)
approx. 1s (output OFF)
When not using lockup protection function, this pin should be connected to ground.
(5) RD pin (LB1862M)
Open-collector output pin that is Low during rotation and OFF when lockup is detected.
The output is a latch type which stays OFF also when the automatic recovery circuit has restored drive mode unless
the rotation actually resumes.
(6) FG pin (LB1962M)
Open-collector output pin for rotation frequency detection.
When IN = High and IN+ = Low, then FG = Low
When IN = Low and IN+ = High, then FG = High
(7) ST pin and HB pin
ST pin : When input to this pin is High, motor drive is stopped (OUT is high impedance).
At this time, RD output indicates lockup protection mode OFF.
HB pin : Hall bias switching pin. At ST pin High input, Hall bias is switched to reduce current drain in fan standby
mode.
If not used, both pins should be open.
(8) Thermal protection circuit
When internal temperature Tj of IC reaches 180
°C, output current limiter is activated to protect against damage.
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