Features: • Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification)Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener diode connected across Z1 - VCC pins:support for fans with large drive current• External resistor...
LB1867M: Features: • Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification)Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener dio...
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• Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification)
Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener diode connected across Z1 - VCC pins:
support for fans with large drive current
• External resistor allows configuration for 12V or 24V.
• Direct Hall element connection possible (built-in Hall amplifier with hysteresis supports core without auxiliary electrode)
• Built-in output transistor with 1.0A output current (strengthened negative-current support for core without
auxiliary electrode)
• Built-in rotation detection function: Low during rotation and High during stop
• Built-in lockup protection with automatic recovery
• Built-in thermal shutdown
Absolute maximum ratings | |
---|---|
Vm min [V] | - |
Vm max [V] | - |
IO max [A] | 1 |
Parameter |
Symbol |
Conditions |
Ratings |
Unit |
Maximum input current |
ICC max |
t 20 ms |
200 |
MA |
Maximum current flowing into RD pin |
VOUT max |
Internal |
V | |
Maximum output current |
IOUT max |
1.0 |
A | |
Maximum current flowing into RD pin |
IRD max |
10 |
MA | |
Maximum RD applied voltage |
VRD max |
30 |
V | |
Allowable power dissipation |
Pd max |
*With specified substrate |
800 |
MW |
Operating temperature |
Topr |
30 to +80 |
°C | |
Storage temperature |
Tstg |
-55 to +150 |
°C |
The LB1867M is a 2-phase unipolar brushless motor driver. With only a few peripheral parts, lockup protection and automatic recovery can be implemented. The IC can be configured for 12V or 24V operation and a wide range of variations, from LOW speed to H-High speed and from 60 cm to 120 cm square using the same PCB. This makes it easy to design highly reliable fan motor installations.