Document
Ordering number : EN6202A
LB1868
Monolithic Digital IC
2-phase Brushless
Fan Motor Driver
http://onsemi.com
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
200 Internal
1.0 10 30 1.1 -30 to +95 -55 to +150
Unit mA V A mA V W °C °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013 May, 2013
31109 MS 20080725-S00003 / 83100RM(KI) No.6202-1/5
Allowable Operating Ranges at Ta = 25°C
Parameter Input current range Common mode input voltage range
Symbol ICC VICM
LB1868
Conditions
Electrical Characteristics at Ta = 25°C, ICC = 10mA
Parameter
Symbol
Conditions
Output limiter withstand voltage
Output saturation voltage
VIN voltage Hall input sensitivity (at zero peak) RD output saturation voltage CT drain current
VOLM1 VOLM2 VOsat1 VOsat2 VIN VHN VRDsat IC1
CT discharge current
IC2
Comp input threshold voltage
VTH1
VTH2
Thermal protection operating
TSD
temperature
Thermal protection circuit
ΔTSD
hysteresis
* Design target value, Do not measurement.
Z1, Z2 open Z1, Z2 short IO = 0.5A IO = 1.0A ICC = 7.0mA Including offset and hysteresis IRD = 5mA C = GND C = VIN
Design target value *
Design target value *
Package Dimensions
unit : mm (typ) 3098D
9.14 10 6
1.2 1.1 1.0
Allowable power dissipation, Pd max -- W
7.62
.