EC4216|Linear LED Driver


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Linear LED Driver

 

 

EC4216

GENERAL DESCRIPTION

EC4216 is a Linear LED Driver of 6-segment LED switch, and its current of each segment in Pow=18V and VD=50V can provide 170mA by Sink. In addition, it contains simple application circuit, every few external components (e.g. a bridge rectifier external resistor and a 4.7uF capacitor are required only in use of 6 Watts)and Negative Temperature Coefficient Output.

 

FEATURES

SOP-8L(Exposed Pad) package

Simple application circuit

Built-in 8V~18V Zener Diode Equivalent circuit, provides for internal circuit, without Start up HVNMOS, convenient for 110V/220V power use.

 

APPLICATIONS

LED Bulbs

 

ABSOLUTE MAXIMUM RATINGS

IZ=10mA.

Pow=16.5V.

D1~D6 Break Down Voltage=700V 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

Pow

8V~18V Power

2

D1

Segment 1 Driver

3

D2

Segment 2 Driver

4

D3

Segment 3 Driver

5

D4

Segment 4 Driver

6

D5

Segment 5 Driver

7

D6

Segment 6 Driver

8

Vref

2.5V Reference & Set Power Voltage

Exposed Pad

Gnd

Ground

 

Ordering Information

 

 

 

 

EC4216 ​​ XX ​​ XX ​​ R

NN6 Segment

BN3+3 Segment

AA6 Segment without OVP

 

 

RTape Reel

 

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ Package

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ MH:SOP-8L(Exposed Pad)

 

Part No.

Package Type

Marking Information

Remark

EC4216NNMHR

SOP-8L
(Exposed PAD)

EC4216

LLLLL

YYWWT

  • LLLLL:Lot No

  • YYWW:Date Code

  • T:Internal Tracking Code

EC4216BNMHR

4216B

LLLLL

YYWWT

EC4216AAMHR

EC4216

LLLLAA

YYWWT

 

ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified

 

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Power

Pow

R1=22k, VCC=30V, D1~D6 Open

8.25

8.36

8.51

V

Reference Voltage

Vref

Pin8 Open

2.54

2.59

2.64

V

Leak Current

ILeak

Pow=0V, V(D1~D6)=40V

 

0.8

1.25

uA

Driver Current

ID

Pow=18V, VD=50V

156

170

188

mA

Quiescent Current

IQ

R1=150k, D1~D6 Open, Vi=110Vrms

 

0.75

 

mArms

Switch Segment Current

ISW

Pow=18V, DN+1 current (IDN+1)to turn off DN

 

36

 

mA

Vref Input Resistor

Ri

Pow Open, Pin8 to Gnd Resistor

 

88

 

Channel Resistor

RON

VCC=30V, R3=47k, C1=4.7uF

95

107

118

Ω

 

Functional Description

Traditional single-segment Linear LED Driver needs to use higher Driver LED Current in order to increase brightness when LED lights up, so the drawback is the low efficiency of LED. EC4216 is a six-segment Linear LED designed to improve the drawback of single-segment Drive LED. The six-segment ​​ switch LED Driver is to divide traditional single-segment LED into six segments, and then conducts segment by segment according to the input voltage changes (D1->D1+D2-> D1+D2+D3 …….). ​​ Such an arrangement can overcome the Forward bias of LED, allowing the LED to light up when the input voltage is low, and thus increase the efficiency of the LED, but also no Over Driver LED is required. ​​ EC4216 consists of two portions, one is Chip power; please refers to Application Circuit (Fig1). ​​ In the Application Circuit, an external resistor R3 is used to set the operating voltage of Chip and the output current for D1~D6. ​​ The set method is as follows: ​​ two resistors R9 (with value 192K) and R9A (with value 88k) are set between Chip Pin1 (Pow) and Pin8 (Vref), and a reference voltage 2.59V is on Pin8. The relationship among Pow, Vref, R9 and R9A is shown as formula 1.

Pow=2.59V+2.59VR9R size 12{"Pow"=2 "." "59V"+2 "." "59V" { {"R9"} over {R} } } {}

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ ……formula 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig-1 110VRMS Application Circuit

 

Therefore, where the external resistor R3 does not exist (Default), R=88k, and Pow=8.3V, and where R=38.5k (R3=68k//R9A), the Pow=15.56V. ​​ The second portion includes Segment Switch Circuit and LED Current Driver. Six segments will be conducted sequentially according to Sine Wave changes. ​​ When Sine Wave is under positive slope changes, the conducting way is as ​​ follows: D1, D1+D2, D1+D2+D3, D1+D2+D3+D4, D1+D2+D3+D4+D5, and D1+D2+D3+D4+D5+D6, and when the Sine Wave is under negative slop changes, then the way is in the opposite direction. ​​ The switch of those segments is carried out by Segment Switch Circuit. The conditions to switch two segments is that where ID(N+1)≧12mA is closed, D(N) ....Segment is turned off. ​​ Drive Current is relevant to Pow voltage; in Default value, the external resistor R3 of application circuit does not exist, ​​ Pow=8.3V. Pow pin=0V 2V 4V 6V 8V 10V 12V 14V 16V 18V which ​​ the maximum current of each Segment (D1~D6) is 170mA.  ​​​​ As for the relationship between Drive Current and Pow, please refer to Fig2.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig2 D1~6 Drive Current with Pow pin

 

 

 

OUTLINE DIMENSIONS

SOP-8L(Exposed PAD)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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