Epson S1F70000 User Manual

6–2

S1F70000 Series

Technical Manual

I

OPR2

Stabilization circuit power dissipation

I

Q

Quiescent current

I

R

Reverse current

I

SWQ

Switching transistor leakage current

K

I

Output voltage temperature gradient

P

D

Power dissipation

P

eff

Voltage multiplication efficiency

R

BSON

Backup switch ON resistance

R

L

Load resistance

R

O

Output impedance

R

ON

ON resistance

R

OSC

Oscillator network resistor

R

RV

Stabilization voltage sensing resistor

R

RVn

Reference voltage

R

SAT

Stabilization output saturation resistance

R

SWON

Switching transistor ON resistance

T

a

Ambient temperature

t

AE

Minimum pulsewidth

t

HA

Address hold time

t

HD

Data hold time

THD

Total harmonic distortion

θ

jn

Thermal resistance

t

MRR

Memory reset recovery time

C

D

Drain capacitance

C

F8

Field slew capacitance

C

G

Gate capacitance

C

I

Input capacitance

C

n

Capacitance

CT

Crosstalk

C

Tn

Temperature gradient

f

CLK

Clock frequency

f

max

Maximum clock frequency

f

OSC

Oscillator frequency

FT

Field through (channel OFF)

I

BSQ

Backup switching leakage current

I

DDO

Operating current

I

DDS

Standby current

I

DD

Power supply current

I

IH

High-level input current

I

IL

Low-level input current

I

LKI

input leakage current

I

MAX

Maximum current

I

O

Output current

I

OH

High-level output current

I

OL

Low-level output current

I

OPR1

Multiplier circuit power dissipation

The following figure shows a thermal design
model which can be used to determine heatsink
capacity.

2. Ensure that the regulator common pin is a sin-

gle-point ground to prevent earth loops. Make
ground lines as thick and short as possible. Use the
specified bypass capacitors for inputs and outputs.
If there is a switching load, use a tantalum or
ceramic capacitor, as these devices have a high
frequency response between the power supply and
ground.

Junction

temperature

Case

temperature

Heatsink

temperature

Ambient

temperature

Heat

source

T

j

T

c

T

s

T

a

θ

jc

θ

cs

θ

sa