LB1999 Sanyo, LB1999 Datasheet - Page 4

• Manufacturer Part Number: LB1999
• Description: Three-Phase Brushless Motor Driver for VCR Capstan Motors
• Manufacturer: Sanyo

Control Function and Current Limiter Function
Pin Descriptions
Pin No.
10
11
12
13
14
15
16
3
4
5
6
9
7
8
FG
FG
FG
W
W
FGS
U
U
V
V
CTL
V
Pin
LIM
FC
IN
IN
IN
IN
IN
IN
CC
OUT
IN
IN
+
+
–
–
+
–
+
–
Input used when the FG amplifier is used as an inverting
input. A feedback resistor must be connected between FG
and this pin.
Noninverting input used when the FG amplifier is used as a
differential input amplifier. No bias is applied internally.
FG amplifier output. There is an internal resistive load.
Control reference voltage. While this pin is set to about
0.43
applying a voltage from a low-impedance circuit.
(The input impedance is about 4.3 kΩ).
Speed control loop frequency characteristics correction.
Speed control input. The control implemented is fixed current
drive controlled by current feedback from Rf.
Gm = 0.58/V (typical) when Rf = 0.5 Ω.
Current limiter function control. The output current can be
varied linearly by applying a voltage to this pin.
The slope is 0.5 A/V (typical) when Rf = 0.5 Ω.
U phase Hall element inputs.
Logic high is defined as states where IN + > IN – .
V phase Hall element inputs.
Logic high is defined as states where IN + > IN – .
W phase Hall element inputs.
Logic high is defined as states where IN + > IN – .
Power supply for all internal blocks other than the output
block. This voltage must be stabilized so that noise and ripple
do not enter the IC.
V
Control Characteristics
CC
internally, this voltage can be modified by
Function
LB1999M
OUT
Control Limiter Characteristics
Slope: 0.50 A/V (typical)
Equivalent circuit
Continued on next page.
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