PT8A2767A Datasheet, PDF (4/8 Pages) Pericom Semiconductor Corporation – DC Motor Controller

PT8A2767x
DC Motor Controller
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Functional Description
z ON/OFF Button
The button will be toggled ON or OFF state by pushing it less than 3 seconds, and toggling lock or unlock state by pushing
it over 3 seconds. Description is as below:
z LED Indicator
LED1, LED2 work status is as below:
Work Status
Mode1
LED1
LED2
Off
Off
Off
Normal
On
Off
On
Under voltage
Off
On
Lock
Normal
Under voltage
Flash2*
Off
Off
Flash2*
Mode2
LED1
LED2
Off
Off
On
Off
Flash1*
Off
Off
Flash2*
Off
Flash2*
Note: 1. Flash1: LED flashes by 1.5Hz;
2. Flash2: LED flashes by 1.5Hz, but only 5 times.
z Reset
After power on, the chip will be reset by internal POR circuit. LED1 and LED2 pin will output low level and OUT pin will
output high-impedance state.
z Over Current Protect
When Output current from pin OUT is over spec, the IC will turn to OFF state.
z Over Temperature Protect
When IC junction temperature is over spec, pin OUT will turn to high-impedance state and the system is still in ON State.
z Battery Over Discharge Protect
During on state, the IC will auto off when the battery voltage is under spec (VT2). If the process repeats three times
continuously, the IC will be always in off state and ON/OFF button will be locked unless reset pin ENB.
z Under Voltage Protection
During on state, the IC will turn to under voltage mode when the battery voltage is under spec (VT1).
12-07-0006
PT0394-2 07/06/12
4