SANYO LB1854M Datasheet
Monolithic Digital IC
Ordering number : EN4476B
O3097HA (OT)/31795TH (OT) No. 4476-1/6
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Three-Phase Brushless Motor Driver IC
LB1854M
Overview
The LB1854M is a three-phase brushless motor driver IC
and is optimal, in particular, for driving VCR capstan and
drum motors.
Features
• 120° voltage linear drive technique
• The LB1854M soft switching scheme allows smaller
external capacitors to be used (e.g., chip capacitors).
• Built-in thermal-shutdown function
• Built-in overcurrent protection circuit
• Built-in FG amplifiers (operational amplifier and
Schmitt amplifier)
• Control start voltage set by an external voltage
• The output current feedback level can be changed by
changing the control gain to one of two levels.
Package Dimensions
unit: mm
3073A-MFP30S
SANYO: MFP30S
[LB1854M]
Specifications
Absolute Maximum Ratings at Ta = 25°C
Allowable Operating Ranges at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage
V
CC
1 max 20 V
V
CC
2 max 7.0 V
Applied output voltage V
OU, V, W
22 V
Maximum output current I
OUT
max 1.5 A
Allowable power dissipation Pd max 1.05 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C
Parameter Symbol Conditions Ratings Unit
Supply voltage
V
CC
1 5 to 18 V
V
CC
2 4.3 to 6.5 V
No. 4476-2/6
LB1854M
Electrical Characteristics at Ta = 25°C, VCC1 = 12 V, VCC2 = 5 V
Note: * Items marked with an asterisk are design target values and are not measured.
Parameter Symbol Conditions min typ max Unit
Current drain
I
CC
1 VC= 0 V, RL= ∞ 17 30 mA
I
CC
2 VC= 0 V 6.5 9.5 mA
[Drive Block]
Output saturation voltage
V
O
(sat) 1 I
OUT
= 0.5 A, sink + source 1.6 2.2 V
V
O
(sat) 2 I
OUT
= 1.0 A, sink + source 2.0 3.0 V
Output TRS breakdown voltage V
O
(sus) I
OUT
= 20 mA* 20 V
Output resting potential V
OQ
VC= 0 V 5.7 6.0 6.3 V
Hall amplifier input offset voltage V
H
offset –5 +5 mV
Hall amplifier input bias current I
H
bias 1 5 µA
Hall amplifier common mode
V
H
ch 1.3 2.2 V
input voltage range
Hall input/output voltage gain GV
HO
43 46 49 dB
[Control Block]
Control output drive gain
GV
CO
1 High gain 37 40 43 dB
GV
CO
2 Low gain 31 34 37 dB
Control output CH difference ∆GV
CO
–2 +2 dB
Control start voltage V
CTH
When V
OUT
p-p = 2 V 2.5 V
Gain control switching high level 4 5 V
Gain control switching
Middle level when the input is open 2 3 V
middle level
Gain control switching low level 0 1 V
[FG Amplifier]
FG amplifier input offset voltage V
FG
offset –8 +8 mV
Open-loop voltage gain GV
FG
f = 1 kHz 60 dB
Source output saturation voltage V
FG OUIO
= 2 mA 37 V
Sink output saturation voltage V
FG ODIO
= –2 mA 1.3 V
Common-mode signal
CHR
*
80 dB
rejection ratio
FG amplifier common-mode
V
FG CH
0 3.5 V
input voltage range
Phase margin * 20 Deg
Schmitt hysteresis
∆Vsh1 FG
OUT
2: High to low 22 mV
∆Vsh2 FG
OUT
2: Low to high 22 mV
Schmitt input voltage range Vsh
CH
0.7 3.5 V
[Thermal Shutdown]
Operating temperature TSD * 150 180 210 °C
Hysteresis ∆TSD * 15 °C
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