EC4217 datasheet(2/4 Pages) E-CMOS

2 / 4 page

EC4217

Linear LED Driver

(Pre-limitary Version)

E-CMOS Corp. (www.ecmos.com.tw)

Page 2 of 4

4F24N Rev. P003

Ordering Information

Part No.

Package Type

Marking Information

Remark

EC4217NNA5R

TO-252-5L

EC4217

LLLLL

YYWWT

LLLLL：Lot No

YYWW：Date Code

T：Internal Tracking Code

ELECTRICAL CHARACTERISTICS

TA = 25°C unless otherwise specified

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Power

Pow

R1=30K, VCC=30V, Pin4 Open

8.25

8.36

8.51

Reference Voltage

Vref

Pin4 Open

2.54

2.59

2.64

Leak Current

ILeak

Pow=0V, V(LED)=40V

1.25

Driver Current

Pow=15V, VLED=25V

110

Quiescent Current

R1=150K, Pin1 Open, Vi=110Vrms

0.75

mArms

Over Voltage

Protection

OVP

R3=820K, Pin1 Voltage

108

Vref Input Resistor

Pow Open, Pin2 to Gnd Resistor

kΩ

Channel Resistor

RON

VCC=30V, R1=22K, C1=4.7uF

Functional Description

EC4217 is sample application circuit 、low cost 、high stability signal segment Linear LED Driver. The EC4217 power

setup please reference (Fig1), The application circuit

external resistor ‘R2’ use to setup chip operation voltage and drive

current , The operation voltage and drive current

is calculated by formula 1. Other define, The chip between Pin5(Pow)

with Pin4(Vref) is resistor R9 , between Pin4(Vref) with Gnd is resistor R9A, The value are 192k and 88k (reference

Fig2), The Pin4 has reference voltage 2.58V.

……Formula 1 R=R2(Chip external resistor)//R9A

Fig1

Fig2

LED drive current(VLED=25V)setup reference Table 1,

2.5

Pow





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