SANYO LB1861, LB1860N, LB1860, LB1861N Datasheet
Variable Speed Fan Motor Driver
Overview
The LB1860 series ICs are drivers for two-phase unipolar drive
DC brushless fan motors. They have functions such as driving,
lock protection, restart and speed control.
Features and Functions
.
Two-speed mode select function requiring less external
component additions: Full speed and Low speed. Or,
thermistor-controlled continuous variable-speed function
according to ambient operation temperatures.
→ Motor starts rotating at a low speed.
.
Motor lock protection and automatic return circuit built in
.
Output transistors: Output current IO= 1.5 A, output circuit
protection Zener diodes (LB1860: M-Vz = 57 V/ LB1861:
M-Vz = 32 V)
→ Enables low-level noise protection with chip capacitor.
.
Built-in thermal shutdown circuit
.
Built-in rotation detect function
(Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)
.
The LB1860 series can be operated from either 12 V or 24 V
power supply by changing an external resistor.
(Strong protection against power supply surge)
.
Connectable direct to a Hall element
Package Dimensions
unit: mm
3098B-DIP10S
[LB1860, 1861]
SANYO : DIP10S
unit: mm
3111-MFP14S
[LB1860M, 1861M]
SANYO : MFP14S
Ordering number: EN3519A
Monolithic Digital IC
LB1860,1860M,1861,1861M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
73096HA(II)/4060TA,TS No.3519-1/6
Specifications
Absolute Maximum Ratings atTa=25°C, ( ): LB1860M, LB1861M
Parameter Symbol Conditions Ratings Unit
Maximum input current I
CC
max t % 20 ms 200 mA
Output supply voltage V
OUT
Internal V
Output current I
OUT
1.5 A
RD flow-in current I
RD
10 mA
RD supply voltage V
RD
50 V
Allowable power dissipation
Pd1 max 1.1 W
Pd2 max Mountedon 20 × 15 × 1.5mm glassepoxy board (0.8) W
Operating temperature Topr –30 to +80
°
C
Storage temperature Tstg –55 to +125
°
C
Allowable Operating Ranges atTa=25°C
Parameter Symbol Conditions Ratings Unit
Input current range I
CC
6.0 to 50 mA
Common-mode input voltage range V
ICM
0toVIN–1.5 V
Electrical Characteristics atTa=25°C, ICC=10mA
Parameter Symbol Conditions min typ max Unit
Output limiting voltage V
OLM
1
LB1860, 1860M: I
O
= 0.1 A 54 57 60 V
LB1861, 1861M: I
O
= 0.1 A 30 32 34 V
Output saturation voltage
V
O sat1
IO= 0.5 A 0.95 1.2 V
V
O sat2
IO= 1.0 A 1.15 1.5 V
V
O sat3
IO= 1.5 A 1.4 2.0 V
Input voltage V
IN
ICC= 7.0 mA 6.4 6.7 7.0 V
Amp input offset voltage V
OFF
–7.0 0 7.0 mV
Amp input bias current I
BA
–250 nA
RD output saturation
voltage
V
RD
(sat) IRD= 5 mA 0.15 0.3 V
C flow-out current I
C
1 C = GND 2.7 3.9 5.0 µA
C discharge current I
C
2 C=V
IN
0.35 0.50 0.65 µA
Comparator input threshold
voltage
V
TH
1 0.77 0.8 V
IN
0.83 V
V
TH
2 0.44 0.47 V
IN
0.50 V
Ct discharge voltage Vct 0.18 0.2 V
IN
0.22 V
Rt input current I
RT
VRT= GND –440 –350 –240 µA
Rt comparator voltage V
RT
RT= OPEN 0.59 0.62 V
IN
0.65 V
Thermal protection circuit
operating voltage
TSD Design target 180
°
C
Thermal protection circuit
hysteresis
∆TSD Design target 40
°
C
Pin Assignments
Top view
Top view
LB1860,1860M,1861,1861M
No.3519-2/6
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