ME2212AM6G

ME2212 Small Package, High Performance, Asynchronies Boost For 10 WLED Driver ME2212 General Description： Features： The ME2212 is a high frequency, asynchronous  VIN Operating Range : 2.5V to 5.5V boost converter. The internal MOSFET can support  Internal Power N-MOSFET Switch up to 10 White LEDs for backlighting and OLED  Wide Range for PWM Dimming (100Hz to power application, and the internal soft start 200kHz) function can reduce the inrush current. The device operates with 1-MHz fixed switching frequency to  1MHz Switching Frequency allow small external components and to simplify  Minimize the External Component Counts possible EMI problems. Moreover, the IC comes  Internal Soft Start with 46V over voltage protection to allow inexpen-  Internal Compensation sive and small-output capacitors with lower voltage  Under Voltage Protection ratings. The LED current is initially set with the  Over Voltage Protection external sense resistor Rs.  Over Temperature Protection Applications： Typical Application：  Cellular Phones   Digital still cameras PDAs and Smart Phones and MP3 and OLED. Probable Instruments  Rs Resistor Value Selection： TYP.（Ω） 10 ILED ( mA ) 20 ILED =20mA， Rs=10Ω V04 www.microne.com.cn Page 1 of 8 ME2212 Selection Guide： Pin Configuration& Marking Information： SOT23-6 Pin information： Pin Number Name Function 1 2 3 4 5 6 LX GND FB EN VOUT VIN Switch Ground Feedback Chip Enable Output Input Absolute Maximum Ratings： Parameter Symbol Ratings Units Input Voltage LX Pin Voltage FB Pin Voltage Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec) Internal Power Dissipation（SOT23-6） VIN LX FB TOPR TSTG TL PD －0.3V~6V －0.3V~6V －0.3V~6V －40℃~85℃ －65℃~125℃ 260℃ 400 V V V ℃ ℃ ℃ mW V04 www.microne.com.cn Page 2 of 8 ME2212 Function Block Diagram： V04 www.microne.com.cn Page 3 of 8 ME2212 Electrical Characteristic T=25℃，VIN＝VEN ＝3.7V，L=22uH，Cin＝2.2 uF ,Cout＝1uF，unless otherwise noted. Parameter Input Voltage Range Under Voltage Lock Out Symbol Condition Min Typ Max Unit VIN 2.5 3.7 5.5 V VUVLO 2 2.2 2.45 V UVLO Hystersis Supply Current Shutdown Current Oscillator Frequency Maximum Duty Cycle Feedback Voltage 0.1 ISS No external Component ISHDN No external Component VEN ＝0V FOSC VFB On Resistance RDS(ON) EN Threshold Logic-High Voltage Logic-Low Voltage Over-Voltage Threshold Over-Current Threshold 0.8 1.5 mA 1 3 5 uA 0.85 1.1 1.5 MHz 90 92 190 200 210 mV 0.7 1.2 Ω % 1.6 V VIL 0.9 V 50 V VOCP 42 46 IOCP 1 1.2 A 85 % 150 ℃ Efficiency η Over Temperature Shutdown OTS V04 VIH V ILED ＝20mA www.microne.com.cn Page 4 of 8 ME2212 Typical Operating Characteristics 1. Efficiency vs. Output Current （3 White LEDs ） 2. Efficiency vs. Input Voltage （10 White LEDs ） Efficiency vs.Output Current Efficiency vs.Input Voltage 100 Efficiency(%) Efficiency(%) 90 80 70 60 VIN=4V VIN=4.5V 50 40 30 20 50 100 150 200 250 300 100 90 80 70 60 50 40 30 20 ILOAD=30mA 2.5 350 3 3.5 3. Frequency vs. Input Voltage （ILED=20mA） Frequency (kHZ) Frequency(kHZ) 1050 1000 950 900 850 800 4 5.5 4.5 5 5.5 1100 1050 1000 950 900 850 800 -25 -10 5 20 35 50 65 80 95 110 125 Temperature (℃) Input Voltage (V) V04 5 Frequency vs.Temperature 1100 3.5 4.5 4. Frequency vs. Temperature （VIN=3.7V,ILED=20mA） Frequency vs.Input Voltage 3 4 Input Voltage(V) Output Current(mA) 2.5 ILOAD=10mA ILOAD=20mA www.microne.com.cn Page 5 of 8 ME2212 5. VFB vs. Input Voltage （10 White LEDs,ILED=20mA） 6. VFB vs. Temperature （ILED=20mA） VFB vs.Temperature 225 204 202 200 220 VFB (mV) VFB (mV) VFB vs.Input Voltage 198 196 194 192 215 210 205 VIN=4.2V 200 195 2.5 3 3.5 4 4.5 5 VIN=3.7V 5.5 -25 -10 5 20 Input Voltage (V) 50 65 80 95 8. Enable Voltage vs. Input Voltage （10 White LEDs ） Enable Voltage vs.Input Voltage VFB vs.Output Current 2.1 204 203 202 201 200 199 198 197 196 Enable Voltage (V) VFB (mV) 35 Temperature (℃) 7. VFB vs. Output Current （10 White LEDs ） VIN=4.2V VIN=3V VIN=3.7V 1.9 1.7 1.5 1.3 1.1 0.9 0.7 5 10 15 20 25 30 2.5 3 3.5 4 4.5 5 5.5 Input Voltage(V) Output Current(mA) V04 VIN=3V 190 www.microne.com.cn Page 6 of 8 ME2212 Package Information ·SOT-23-6 Millimeters Inches DIM V04 Min Max Min Max A 0.9 1.45 0.0354 0.0570 A1 0 0.15 0 0.0059 A2 0.9 1.3 0.0354 0.0511 B 0.2 0.5 0.0078 0.0196 C 0.09 0.26 0.0035 0.0102 D 2.7 3.10 0.1062 0.1220 E 2.2 3.2 0.0866 0.1181 E1 1.30 1.80 0.0511 0.0708 e 0.95REF 0.0374REF e1 1.90REF 0.0748REF L 0.10 0.60 0.0039 0.0236 a0 00 300 00 300 www.microne.com.cn Page 7 of 8 ME2212      The information described herein is subject to change without notice. Nanjing Micro One Electronics Inc is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Nanjing Micro One Electronics Inc is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro One Electronics Inc. Although Nanjing Micro One Electronics Inc exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. V04 www.microne.com.cn Page 8 of 8