lv8762t Sanyo Semiconductor Corporation, lv8762t Datasheet - Page 8

• Manufacturer Part Number: lv8762t
• Description: Forward/reverse H-bridge Driver
• Manufacturer: Sanyo Semiconductor Corporation

DC Motor Driver
1.Standby function
2.DCM output control logic
3.Current limit control timing chart
4. Setting the time of current limit brake value
This is can switch the standby – operation mode by setting the ST pin.
On standby-mode, all logic circuit is reset, internal regurator is off, internal charge-pump is off.
This IC can set the time of the current limit break by connecting the capacitor with CHOP-GND.
The value of the capacitor is decided according to the following expression.
brake time: T CHOP ≈ C CHOP × Vt CHOP ÷ I CHOP [sec]
ex. Cchop=50[pF]
Tchop[sec] = 50[pF] × 1.0[V] ÷ 5[μA] = 10[μs]
Output
current
ST
OUTA
OUTB
“L” or OPEN
H
H
H
H
L
ST
“H”
Vt CHOP :CHOP comparator threshold voltage. TYP=1.0[V]
I CHOP :CHOP charge current. TYP=5[μA]
Contol Input
CHARGE
LIMIT current
IN1
H
H
L
L
*
operation mode
standby mode
mode
Tchop
IN2
SLOW
H
H
L
L
*
LV8762T
OUTA
OFF
OFF
5V regurator
H
L
L
standby
on
Output
OUTB
OFF
OFF
H
L
L
charge pump
standby
on
CCW (reverse)
CW (forward)
Output OFF
Standby
Brake
Mode
No.A1926-8/13