HCPL316J datasheet(28/33 Pages) HP

28 / 33 page

RC + RG = [VCC2 – VOH – (VEE)]

IOH,PEAK

= [4 V – (-5 V)]

0.5 A

= 18

Ω

➯ RC = 8 Ω

See “Power and Layout

Considerations” section for more

information on calculating value

of RG.

Figure 73a. Safe Hardware Reset for Non-Inverting

Input Configuration (Automatically Resets for Every

VIN+ Input).

User-Configuration of the

HCPL-316J Output Side

RG and Optional Resistor RC:

The value of the gate resistor RG

(along with VCC2 and VEE)

determines the maximum amount

of gate-charging/discharging

current (ION,PEAK and IOFF,PEAK)

and thus should be carefully

chosen to match the size of the

IGBT being driven. Often it is

desirable to have the peak gate

charge current be somewhat less

Figure 73b. Safe Hardware Reset for Non-Inverting Input

Configuration.

Figure 73d. Safe Hardware Reset for Inverting Input

Configuration (Automatically Resets for Every VIN-

Input).

Figure 73c. Safe Hardware Reset for Inverting Input

Configuration.

than the peak discharge current

(ION,PEAK < IOFF,PEAK). For this

condition, an optional resistor

(RC) can be used along with RG

to independently determine

ION,PEAK and IOFF,PEAK without

using a steering diode. As an

example, refer to Figure 74.

Assuming that RG is already

determined and that the design

IOH,PEAK = 0.5 A, the value of RC

can be estimated in the following

way:

VIN+

VIN-

VCC1

GND1

RESET

FAULT

VLED1+

VLED1-

HCPL-316J

µC

VCC

VIN+/

RESET

FAULT

VIN+

VIN-

VCC1

GND1

RESET

FAULT

VLED1+

VLED1-

HCPL-316J

µC

VCC

RESET

FAULT

VIN+

VIN-

VCC1

GND1

RESET

FAULT

VLED1+

VLED1-

HCPL-316J

µC

VCC

RESET

FAULT

VIN-

VCC

VIN+

VIN-

VCC1

GND1

RESET

FAULT

VLED1+

VLED1-

HCPL-316J

µC

VCC

RESET

FAULT

VIN-

VCC

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