LB1868_09 Datasheet, PDF (1/5 Pages) Sanyo Semicon Device – 2-phase Brushless Fan Motor Driver

Ordering number : EN6202A
LB1868
Monolithic Digital IC
2-phase Brushless
Fan Motor Driver
Overview
The LB1868 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 60cm to 120cm square using the same PCB. This makes it easy to design highly
reliable fan motor installations.
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 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
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum input current
Maximum applied output voltage
Maximum output current
Maximum current flowing into RD pin
Maximum RD applied voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
ICC max
VOUT max
IOUT max
IRD max
VRD max
Pd max
Topr
Tstg
t ≤ 20ms
Conditions
Ratings
Unit
200
mA
Internal
V
1.0
A
10
mA
30
V
1.1
W
-30 to +95
°C
-55 to +150
°C
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"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
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the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
31109 MS 20080725-S00003 / 83100RM(KI) No.6202-1/5