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=15V and VD=20V can provide 60mA 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 2 Watts), OVP (Over Voltage Protection) Function, and Negative Temperature Coefficient Output. FEATURES ● SOP-8L(Exposed Pad) package ● Simple application circuit ● Built-in 8V~15V 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=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 Po Vref w D1 D6 GN D2 D D5 Exposed Pad D4 D3 Pin Number 1 2 3 4 5 6 7 8 Exposed Pad E-CMOS Corp. (www.ecmos.com.tw) Top View Pin Name Pow D1 D2 D3 D4 D5 D6 Vref Gnd Function 8V~15V Power Segment 1 Driver Segment 2 Driver Segment 3 Driver Segment 4 Driver Segment 5 Driver Segment 6 Driver 2.5V Reference & Set Power Voltage Ground Page 1 of 5 4H11N Rev. F001 Linear LED Driver EC4216 Ordering Information Part No. Package Type Marking Information EC4216 LLLLL YYWWT EC4216NNMHR SOP-8L (Exposed PAD) EC4216BNMHR EC4216AAMHR Remark 1. LLLLL：Lot No 2. YYWW：Date Code 3. T：Internal Tracking Code 4216B LLLLL YYWWT EC4216 LLLLAA YYWWT ELECTRICAL CHARACTERISTICS TA = 25°C unless otherwise specified Parameter Symbol Condition Power Pow R1=22k, VCC=30V, D1~D6 Open Reference Voltage Vref Pin8 Open Leak Current ILeak Pow=0V, V(D1~D6)=40V Driver Current ID Pow=15V, VD=20V Quiescent Current IQ R1=150k, D1~D6 Open, Vi=110Vrms Over Voltage Protection Switch Segment Current Vref Input Resistor Channel Resistor OVP Segment D6 Voltage ISW DN+1 current (IDN+1)to turn off DN Ri RON Pow Open, Pin8 to Gnd Resistor VCC=30V, R1=22k, C1=4.7uF Min 8.25 2.54 55 82 Typ 8.36 2.59 0.8 60 0.75 Max 8.51 2.64 1.25 64 Unit V V uA mA mArms 92 108 V 12 173 88 176.53 mA 180 kΩ 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 2.59 V 2.59 V R9 ……formula 1 R E-CMOS Corp. (www.ecmos.com.tw) Page 2 of 5 4H11N Rev. F001 Linear LED Driver EC4216 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 I D(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. Where R3=68k, the Pow=15.6V, and where V D(1~6)=20V, the maximum current of each Segment (D1~D6) is 60mA. As for the relationship between Drive Current and Pow, please refer to Fig2 and Fig3. Fig2 D2~6 Drive Current with Pow E-CMOS Corp. (www.ecmos.com.tw) Page 3 of 5 4H11N Rev. F001 Linear LED Driver EC4216 Fig3 D1 Drive Current with Pow Fig4 3+3 Segment Application for EC4216BNMHR E-CMOS Corp. (www.ecmos.com.tw) Page 4 of 5 4H11N Rev. F001 Linear LED Driver EC4216 OUTLINE DIMENSIONS SOP-8L(Exposed PAD) E-CMOS Corp. (www.ecmos.com.tw) Page 5 of 5 4H11N Rev. F001