EC4216

Linear LED Driver

Page 2 of 5

4H11N Rev. F001

Ordering Information

Part No.

Package Type

Marking Information

Remark

EC4216NNMHR

SOP-8L

(Exposed PAD)

EC4216

LLLLL

YYWWT

1.

LLLLL：Lot No

2.

YYWW：Date Code

3.

T：Internal Tracking Code

EC4216BNMHR

4216B

LLLLL

YYWWT

EC4216AAMHR

EC4216

LLLLAA

YYWWT

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Power

Pow

8.25

8.36

8.51

V

Reference Voltage

Vref

Pin8 Open

2.54

2.59

2.64

V

Leak Current

0.8

1.25

uA

Driver Current

55

60

64

mA

Quiescent Current

0.75

Over Voltage

Protection

OVP

Segment D6 Voltage

82

92

108

V

Switch Segment

Current

12

mA

Vref Input Resistor

Ri

Pow Open, Pin8 to Gnd Resistor

88

kΩ

Channel Resistor

173

176.53

180

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.

R

9

R

V

2.59

V

2.59

Pow



