EC4217|Linear LED Driver


規格書下載


Linear LED Driver

(Pre-limitary Version)

 

 

EC4217

 

 

GENERAL DESCRIPTION

EC4217 is a signal segment Linear LED Driver chip, Supply current(Sink) is 120mA at VLED=25V and Pow=15V. Other characteristic are sample application circuit (EC4217 use in 3.5 watts LED driver is only bridge rectifier and one 150kΩ resistor and one 4.7uF capacitor) and ​​ OVP( Over Voltage Protection)Function and negative coefficient ​​ output current behavior

 

FEATURES

TO-252-5L Package Type

Sample application circuit

Built in 8V~15V Zener Diode equal circuit to supply chip power which no need Start up HVNMOS, so is convenient used in 110V/220V line voltage

 

APPLICATIONS

LED Bulbs

 

ABSOLUTE MAXIMUM RATINGS

IZ=8mA

Pow=16.5V

Pin1 Break Down Voltage=600V at Pow=0V

Operating Temperature Range-40 to 120

Storage Temperature Range-40 to 140

ESD Level………………(H.B.M) 2KV

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ (M.M) 200V

Note:

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional Operation under these conditions is not implied. Continuous operation of the device at the absolute rating level

may affect device reliability

 

PIN CONFIGURATION

 

 

 

 

 

 

 

 

 

 

 

 

Top View

Pin Number

Pin Name

Function

1

LED

Link LED

2

OVP_In

Over Voltage Detect In

3

Gnd

Ground

4

Vref

2.5V Reference Voltage

5

Pow

Chip Power Supply

 

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

V

Reference Voltage

Vref

Pin4 Open

2.54

2.59

2.64

V

Leak Current

ILeak

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

 

 

1.25

uA

Driver Current

ID

Pow=15V, VLED=25V

110

 

 

mA

Quiescent Current

IQ

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

 

0.75

 

mArms

Over Voltage Protection

OVP

R3=820K, Pin1 Voltage

82

92

108

V

Vref Input Resistor

Ri

Pow Open, Pin2 to Gnd Resistor

 

88

 

Channel Resistor

RON

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

 

 

94

Ω

 

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.

Pow=2.58V+2.58VR9R size 12{"Pow"=2 "." 58V+2 "." 58V { {"R9"} over {R} } } {}

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Fig1  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Fig2

 

 

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

 

 

 

 

 

 

Pow(V)

ID(I LED mA) ±2.5%

15

135

14.5

131

14

128.5

13.5

121

13

115

12.5

107

12

99.5

11.5

92

11

85.5

10.5

79.5

10

73

9.5

66

9

60

8.5

52.5

8

46.5

 

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Table 1

OVP Set up: Fig 3 is chip Pin4 (OVP_In) equal circuit, When OVP_In13V start OVP function , After OPV function is enabled then Pow(Pin5)0V, The OVP_IN(V) is calculated by formula 2

 

 

OVP_IN(V)=R2A+R2R2A+R2+R3(Rext)Pin1(V)..........2 size 12{"OVP_IN" \( V \) = { {"R2A"+"R2"} over {"R2A"+"R2"+"R3" \( "Rext" \) } } cdot "Pin1" \( V \) "." "." "." "." "." "." "." "." "." "." 2} {}

 

 

 

 

 

 

 

 

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Fig3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


規格書下載

規格是死的,設計是活的
我們提供具有靈活彈性的客製化IC與模組設計

告訴我們你想做的產品項目吧!

規格是死的,設計是活的
我們提供具有靈活彈性的客製化IC與模組設計

告訴我們你想做的產品項目吧!