Description Features The SE3900 is a green-mode Pulse Width Modulation ¾ Low Cost Emitter Drive PWM Solution (PWM) controller. It is specifically designed for low ¾ 0.13W Standby Power power applications such as 5W-20W Adaptors and ¾ Current Mode Operation Off-line typical ¾ Short Circuit Protection applications, the low standby power, space saving, ¾ Over-Current Protection and low cost are all required. SE3900 is a perfect ¾ Over-Temperature Protection solution to meet these challenges. The typical ¾ Under-Voltage Lockout with Auto-restart standby power is only 0.13Watt. ¾ Available in TO-92 Packages In normal operation, the SE3900 switches on and off ¾ RoHS Compliant and 100% Lead (Pb)-Free battery Chargers. In these at a fixed switching frequency of about 60 kHz. With a current limit capability of about 420mA, the SE3900 can directly drive the emitter of a high voltage NPN transistor. When the output power falls below a given level, the IC enters skip cycle mode to reduce power Application consumption. ¾ Battery Chargers The SE3900 also features Under-Voltage Lockout , ¾ Universal Off-line Power Supplies Over-Temperature ¾ Power Adaptors ¾ LED 3W-9W Low Cost Solutions with SE1051 Protection, Over-Current Short Circuit Protections. and The SE3900 is available in TO-92 Packages. Pin Configuration Pin Description Name Pin# Function VCC 1 The power supply of the IC, and is generally connected to opto-coupler's emitter GND 2 Supply ground OUT 3 The output pin, connected to the emitter of NPN transistor Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 1 Absolute Maximum Rating Symbol Parameter Maximum Units VCC DC Supply Voltage -0.3 ~ 6 V OUT Voltage at OUT -0.3~ 18 V 220 °C/W 0 to 125 °C θJA TJ Thermal Resistance Junction to Ambient (TO92) Operating Junction Temperature Range TSTG Storage Temperature Range TLEAD Lead Temperature (Soldering 10 Sec) -40 to 150 °C 260 °C Electrical Characteristics (Vcc=4V, TJ=25℃,unless otherwise specified) Parameter Symbol Conditions Min Typ Max Unit VTH (ST) 5.00 5.25 5.5 V VOPR (Min) 3.4 3.65 3.9 V UVLO SECTION Start-up Voltage Minimal Operating Voltage THERMAL PROTECT Thermal Shutdown TSD 150 ℃ Thermal Hysteresis THy 20 ℃ STANDBY CURRENT SECTION IST Start-up Current Vcc=4V ICC(OPR) Operating Current VCC Zener Voltage Vz ICC =10mA Dynamic Impedance RVCC Vcc=3.8 to 4.8V 6 0.22 0.4 mA 0.45 0.7 mA 6.3 V 9 KΩ INTERNAL OSCILLATOR Switching Frequency f 50 60 75 KHz VST 8.5 11 V VSC 6 V VOPR (Min)+0.2 75 % Vcc=Vth(st)-0.2 3 % 3 Ω DRIVE OUTPUT SECTION OUT Start-up Voltage Short Circuit Threashold Voltage Maximum Duty Cycle Dmax Minimum Duty Cycle Driver OUT On-Resistance ROUT Switch Off Current Effective Current Limit OUT Current Coefficient IOUT =0.06A Driver off, Vout=10V ILIM GA Vcc= VOPR +0.1V 20 420 40 uA mA -0.3 Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 2 A/V Typical Application 1 220V R1 10/1W 1N4007 2 4 R2 100K 1/2W 1.5M 1/4W 3 Brid g e D1-D4 R3 220V Port C12 2.2uF 5V/1A D8 SB240 C10 D5 220uF/15V 1N4007 C8 D7 1N4148 C10 4.7uF/15V C9 R9 100 222M 400V R11 10.7K R5 4.7 U2 R8 2K Q1 D6 C12 1N4818 104 13003 R4 U3 400 SE431 R6 200 SE3900 OUT C4 10uF 12V GND R10 10K Vcc 3.3n C5 C6 10uF U1 Fig.1 5V/1A Mobile Phone USB Charger Using SE3900(TO92) and SE431. Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 3 Port 1 220V R1 10/1W 1N4007 2 4 R2 100K 1/2W 1.5M 1/4W 3 Brid g e D1-D4 R3 220V C12 2.2uF 12V/700mA D8 SB240 C10 D5 220uF/15V 1N4007 C8 D7 1N4148 C10 4.7uF/15V C9 222M 400V R5 4.7 U2 R10 0.8K Q1 D6 1N4818 R11 100 13003 R8 2K 400 R6 200 SE3900 OUT 12V GND U1 C12 R12 22K 224 C13 R13 R4 C4 10uF R17 89K 470K 104 Vctrl Vcc R15 10K Vout Vsense Vcc 3.3n C5 C6 10uF GND Ictrl R14 1K U3 SE1051 0.34ohm R16 Fig.2 12V/700mA Lighting 9W LED Solution Using SE3900(TO92) and SE1051. Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 4 1 220V R1 10/1W 1N4007 2 4 R2 100K 1/2W 1.5M 1/4W 3 Brid g e D1-D4 R3 220V C12 2.2uF 8.4V/2A D8 SB240 C10 D5 220uF/15V 1N4007 C8 D7 1N4148 C10 4.7uF/15V R18 1K C9 222M 400V C12 R12 22K R5 4.7 U2 R10 0.8K 224 C13 R13 470K BAT1 R17 60K 104 Q1 D6 BAT2 R11 100 1N4818 LED-G 13003 R4 R8 2K 400 R6 200 SE3900 OUT C4 10uF LED-R 12V U1 Vcc Vctrl R15 10K Vout Vsense Vcc GND Red Green 3.3n C5 C6 10uF Ictrl GND R14 1K 0.05ohm R16 Fig.3 8.4V/1A 2 Cell Batteries Charger, using SE3900(TO92) and SE1052. Note: SE1052 integrates Voltage reference, Voltage setting and Current setting and LED drivers all in the same IC. When the charging is on-going, the Red LED is On and the Green LED is Off. When the Charging is completed, the Green LED is On and the Red LED is Off. The charging current can be programmed by setting the R16 to the proper value. Please refer to SE1052 datasheet for details. Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 5 OUTLINE DRAWING TO-92 A DIMN B D E G F H K J A B E F G H J K DIMENSIONS INCHES MM MIN MAX MIN MAX 0.175 0.170 0.500 0.016 0.045 0.095 0.080 0.125 0.205 0.210 0.610 0.021 0.055 0.105 0.105 0.165 4.445 4.318 12.70 0.407 1.143 2.413 2.032 3.175 Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 1/20/2009 Revision 1/20/2009 Preliminary and all contents are subject to change without prior notice. © Seaward Electronics, Inc., 2008. • www.seawardinc.com • Page 6 5.207 5.334 15.50 0.533 1.397 2.667 2.667 4.191