LV8741V-TLM-E ON Semiconductor, LV8741V-TLM-E Datasheet - Page 20

• Manufacturer Part Number: LV8741V-TLM-E
• Description: Motor / Motion / Ignition Controllers & Drivers STEPPING MOTOR
• Manufacturer: ON Semiconductor

Specifications of LV8741V-TLM-E

• Motor Type: DC
• No. Of Outputs: 2
• Driver Case Style: SSOP
• No. Of Pins: 44
• Operating Temperature Range: -20°C To +85°C
• Svhc: No SVHC (20-Jun-2011)
• Base Number: 8741
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Details

Output short-circuit protection circuit
(1) Output short-circuit protection operation changeover function
(2) Auto reset method
(3) Latch method
(4) Output short-circuit condition warning output pin
To protect the IC from damage due to short-circuit of the output caused by lightening or ground fault, the output
short-circuit protection circuit to put the output in standby mode and turn on the alarm output is incorporated. Note
that when the RF pin is short-circuited to GND, this output short-circuit protection is not effective against shorting to
power.
Changeover to the output short-circuit protection of IC is made by the setting of OCPM pin.
When the output current is below the output short-circuit protection current, the output is controlled by the input
signal. When the output current exceeds the detection current, the switching waveform as shown below appears
instead.
(When a 20kΩ resistor is inserted between RCHOP and GND)
When detecting the output short-circuit state, the short-circuit detection circuit is activated.
When the short-circuit detection circuit operation exceeds the timer latch time described later, the output is changed
over to the standby mode and reset to the ON mode again in 256µs (TYP). In this event, if the overcurrent mode still
continues, the above switching mode is repeated till the overcurrent mode is canceled.
Similarly to the case of automatic reset method, the short-circuit detection circuit is activated when it detects the
output short-circuit state.
When the short-circuit detection circuit operation exceeds the timer latch time described later, the output is changed
over to the standby mode.
In this method, latch is released by setting PS = “L”
EMO, warning output pin of the output short-circuit protection circuit, is an open-drain output.
EMO outputs ON when output short-circuit is detected.
Output current
OCP voltage
Low or Open
EMM
High
Exceeding the
over-current
detection
current
1V
Tscp
ON
1 to 2µs
Auto reset method
Latch method
State
OFF
LV8741V
ON
256µs (TYP)
OFF
ON
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