LV8762T-TLM-H SANYO, LV8762T-TLM-H Datasheet - Page 10

• Manufacturer Part Number: LV8762T-TLM-H
• Description: IC H-BRIDGE DVR FORW/REV 24TSSOP
• Manufacturer: SANYO

Specifications of LV8762T-TLM-H

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 869-1301-2

Output short-circuit protection function
1. Output short protect mode
2.Protection function operation (Latch method)
3. Protection function operation (Auto retry method)
4.Unusual Condition Warning Output Pin (EMO)
Thils IC incorporates an output short-circuit protection circuit.It turns the output off to prevent destruction of the IC if
a problem such as an output pin being shorted to the motor power supply or ground occurs.
Then short-circuit detected, alart signal is assert to EMO pin.
This function can be switched by EMM pin. EMM pin is L or OPEN then latch method, H then auto-retry method.
The short-circuit protection circuit is activated when it detects the output short-circuit state. If the short-circuit state
continues for the internally preset period (≈ 2μs), the protection circuit turns off the output from which the short-circuit
state has been detected. Then it turns the output on again after a lapse of the timer latch time (T SCP ) described later. If
the short-circuit state is still detected, it changes all the outputs to the standby mode and retains the state. The latched
state is released by setting the ST to L.
In this mode, short-protection function try repeatedly to detecting short-circuit.
The short-circuit detection circuit operates when a short output is detected as well as the latch method. The output is
switched to the standby mode when the operation of the short-circuit detection circuit exceeds time (T SCP ) of the timer
latch, and it returns to the turning on mode again after 2ms(typ). At this time, the switching mode is repeated when is
still in the overcurrent mode until the overcurrent mode is made clear.
The LV8762T is provided with the EMO pin which notifies the CPU of an unusual condition if the protection circuit
operates by detecting an abnormal condition of the IC. This pin is of the open-drain output type, and if abnormality is
detected, the EMO output becomes (EMO=L) of on.
The EMO pin is placed in the ON state when one of the following conditions occurs.
1. Shorting-to-power or shorting-to-ground occurs at the output pin and the output short-circuit protection circuit is
2. The IC junction temperature rises and the thermal protection circuit is activated.
activated.
Internal counter
detection state
Short-circuit
“L” or OPEN
Output state
SCP voltage
EMM Pin
H bridge
“H”
1st counter
start
Short-
circuit
1st counter
stop
Release
Auto retry
Method
Output ON
1st counter
Latch
start
Short-circuit
LV8762T
1st counter
end
Outout OFF
Threshold voltage
2st counter
start
Output ON
2st counter
end
Stand-by
state
No.A1926-10/13