MC44608P100 데이터 시트보기 (PDF) - Motorola => Freescale

부품명

상세내역

제조사

MC44608P100

Few External Components Reliable and Flexible GreenLine™ Very High Voltage PWM Controller

Motorola => Freescale 

EQUATION 1

Start–up Phase Duration:

+ tstart–up CVcc

* (Vstup UVLO2)

Istup

MC44608

where: Istup is the start–up current flowing through VCC pin

CVcc is the VCC capacitor value

EQUATION 2

Switching Phase Duration:

+ ) * tswitch

CVcc (Vstup UVLO1)

IccS IG

where: IccS is the no load circuit consumption in switching phase

IG is the current consumed by the Power Switch

EQUATION 3

Latched–off Phase Duration:

* + ) * tlatched off

CVcc (UVLO1 UVLO2)

IccL Ipin3

where: IccL is the latched off phase consumption

Ipin3 is the current drawn from pin3 adding a resistor

EQUATION 4

Burst Mode Duty Cycle:

+ * ) ) * dBM

tstart up

tswitch

tswitch tlatched off

EQUATION 5

+ dBM CVcc

* )** (Vstup UVLO2)

) ) ) Istup

CVcc (Vstup UVLO1)

IccS IG

CVcc (Vstup UVLO1)

IccS IG

CVcc

* (UVLO1 UVLO2)

) IccL Ipin3

EQUATION 6

ǒ+ dBM

) ń 1

kS Stup

Ǔ ǒ1

) IccS IG

) ń Istup

kS L

Ǔ) IccS IG

) IccL Ipin3

where: kS/Stup = (Vstup – UVLO2)/(Vstup – UVLO1)

kS/L = (UVLO1 – UVLO2)/(Vstup – UVLO1)

EQUATION 7

+ dBM

ȧȡȢ) ) 1

IccS IG

Istup

ǒ ǒ1

ń ) ń kS Stup

kS L

ǓǓȧȣ )Istup

Ȥ IccL Ipin3

MOTOROLA ANALOG IC DEVICE DATA

9

Share Link: