LV8741V-TLM-E ON Semiconductor, LV8741V-TLM-E Datasheet - Page 21

• 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

(5) Timer latch time (Tscp)
Charge Pump Circuit
The time to output OFF when an output short-circuit occurs can be set by the capacitor connected between the CEM
pin and GND. The capacitor (C) value can be determined as follows :
When the ST pin is set High, the charge pump circuit operates and the VG pin voltage is boosted from the VM voltage
to the VM + VREG5 voltage. If the VG pin voltage is not boosted sufficiently, the output cannot be controlled, so be
sure to provide a wait time of tONG or more after setting the ST pin High before starting to drive the motor.
When controlling the stepping motor driver with the CLK-IN input, set the ST pin High, wait for the tONG time
duration or longer, and then set the OE pin High. In addition, when controlling the stepping motor and DC motor
driver with parallel input, set the ST pin High, wait for the tONG time duration or longer, and then start the control for
each channel.
Timer latch : Tscp
The Tscp time must be set so as not to exceed 80% of the chopping period.
The CEN pin must be connected to (S) GND when the output short protection funtion is not to be used.
DC11, DC12, DC21 and DC22
OE (STM mode)
(DCM mode)
VM+VREG5
VM+4V
VM
ST
Tscp ≈ Td+C × V/I [sec]
VG Pin Voltage Schematic View
Td : Internal delay time TYP 4µs
V : Threshold voltage of comparator TYP 1V
I : CEM charge current TYP 2.5µA
tONG
LV8741V
High after the tONG wait time has elapsed
VG pin voltage
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