PDE-3064-0

ECN3064

5.

Function

5.1

Truth Table

Terminal

Input

Output

UT,VT,WT,

L

OFF

UB,VB,WB

H

ON

UT,UB

UT&UB=H

OFF

VT,VB

VT&VB=H

OFF

WT,WB

WT&WB=H

OFF

5.2

Timing Chart

UT

VB

UB

WT

VT

WB

Top Arm

Bottom Arm

MU Output

MV Output

MW Output

Example of DC Brushless motor drive

5.3 Overcurrent Limiting Operation

This IC detects overcurrent by outside resistance Rs.

When Rs input voltage exceeds inner reference voltage

Vref(0.5V typical), this IC turns off the bottom output. After

overcurrent detection, a reset operation is done

at each inner clock signal period.

In case of not using this function,

please connect Rs

terminal to GL terminal.

5pF

Vref

typ 220k

Ω

typ 200k

Ω

typ 300

Ω

VB

RS

RS terminal inner equvalent circuit

typ

Inner Clock Trigger

Latch

S

R