lb1863m Sanyo Semiconductor Corporation, lb1863m Datasheet - Page 4

• Manufacturer Part Number: lb1863m
• Description: Two-phase Unipolar Brushless Motor Driver Automatic Recovery Type Circuit In A Miniature Flat Package
• Manufacturer: Sanyo Semiconductor Corporation

Sample Application Circuit Output Waveforms
Truth Table
Design Documentation (See the application circuit diagram.)
1. Power-supply voltage (V
2. Hall input pin voltages (IN – and IN + pins)
3. Output transistors (OUT1 and OUT2 pins)
IN +
H
H
L
L
Since these miniature flat package products supply power to the Hall amplifier block and the control block from an
internal parallel regulator, they operate with good stability with respect to kickback currents from the motor and
variations in the power-supply voltage. They also provide an adequate ability to withstand surges. The resistor R1
between the V
in the fan motor power-supply voltage range.
V
following formula.
• Abnormal voltage considerations
The maximum allowable current for the V
up to the plus side abnormal voltage Vsurge give by formula (2).
The Hall element output voltages to the Hall element input pins must be in the range 0 to (V
the Hall input pins to the output pin is over 100 dB. The Hall input amplifier offset voltage is ±7 mV. This means that
the Hall element output must be set up taking this ±7 mV offset into account.
Applications should adopt one of the following three output protection techniques.
IN
If a capacitor is inserted between OUT and ground, use a capacitor with a value up to C = 10 µF, and design that
value so that the kickback and reverse voltages do not exceed V
If a Zener diode is added, determine a value for the Zener voltage that is lower than V
noise is a problem, insert a capacitor between B1 and B2.
If a capacitor is inserted between OUT and B1, set the capacitor value so that the kickback voltage is lower than
V
I
Vsurge = V
Output current: I
Output saturation voltage: V
has a typical value of 6.7 volts when I
IN –
CC
O(SUS)
H
H
L
L
= ————— ......................(1)
. If oscillation occurs, insert a resistor in series with the capacitor.
V
C
H
H
L
L
CC
CC
IN
R1
and V
– V
OUT1
+ R1 200 mA......(2)
H
H
L
H
IN
O
= 1.5 A maximum
IN
IN
OUT2
pins should be set up so that a current in the range I
H
H
H
L
pin)
O
RD
H
H
sat = 1.15V/1.0 A (typical)
L
L
IN
CC
pin is 200 mA. Therefore, the IC design allows it to withstand voltages
LB1863M, 1869M
is 7 mA. The current flowing into V
OR
.
CC
= 6 to 50 mA flows into the V
IN
can be calculated with the
O(SUS)
IN
–1.5 V). The gain from
. If radio-frequency
No. 4943-4/6
IN
pin