ST TEA2262 free download

File name TEA2262.pdf

TEA2262 SWITCH MODE POWER SUPPLY CONTROLLER . . . . . . . . . . POSITIVE AND NEGATIVE OUTPUT CURRENT UP TO 1A LOW START-UP CURRENT DIRECT DRIVE OF THE MOS POWER TRANSISTOR TWO LEVELS TRANSISTOR CURRENT LIMITATION DOUBLE PULSE SUPPRESSION SOFT-STARTING UNDER AND OVERVOLTAGE LOCK-OUT AUTOMATIC STAND-BY MODE LARGE POWER RANGE CAPABILITY IN STAND-BY (Burst mode) INTERNAL PWM SIGNAL GENERATOR DESCRIPTION The TEA2262 is a monolithic integrated circuit for the use in primary part of an off-line switching mode power supply using a MOS power transistor. All functions required for SMPS control under normal operating,transient or abnormal conditions are provided. The capability of working according to the "masterslave" concept, or according to the "primary regulation" mode makes the TEA2262 very flexible and easy to use. This is particularly true for TV receivers wherethe IC provides an attractive and low cost solution (no need of stand-by auxiliary power supply). PIN CONNECTIONS TRANSFORMER DEMAGNETIZATION SENSING INPUT SECONDARY PULSES INPUT POWER TRANSISTOR CURRENT LIMITATION INPUT GROUND GROUND ERROR AMPLIFIER INPUT (INVERTING) ERROR AMPLIFIER OUTPUT OVERLOAD INTEGRATION CAPACITOR IS IN I max. GND GND E S C2 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V CC V OUT GND GND R0 C0 C1 DIP16 (Plastic Package) ORDER CODE : TEA2262 POWER SUPPLY POSITIVE OUTPUT STAGE SUPPLY POWER OUTPUT GROUND GROUND OSCILLATOR RESISTOR OSCILLATOR CAPACITOR SOFT-START CAPACITOR 2262-01.EPS April 1996 1/9 2/9 VCC V+ 15 16 TEA2262 S 7 BLOCK DIAGRAM TEA2262 INTERNAL BIAS VCC MONITORING 15.7V VREF (2.49V) 8.5V 11.8V Overvoltage Protection Error Amplifier E 6 VREF 2.49V -1 Primary Pulses IS LOGIC Regulation Pulses LOGIC PROCESSOR MODULATOR LOGIC POSITIVE OUTPUT STAGE VCC +1A (Max.) Modulators 14 OUT NEGATIVE OUTPUT STAGE -1A (Max.) AUTOMATIC BURST GENERATION Repetitive Overload Protection Current Limitation Demagnetization Sensing 0.15V 2.55V 0.6V 0.84V 45 µA TON (Max.) (60%) SOFT-START OSCILLATOR f/4 Secondary Pulse 10 C0 IS 1 2 IN 10 µA 8 C2 3 IMAX 4 5 12 GND 13 9 11 C1 R0 2262-02.EPS TEA2262 ABSOLUTE MAXIMUM RATINGS Symbol VCC V+ IOUT+ IOUTTj Tstg Power Supply Output Stage Power Supply Parameter V16-V4, 5, 12, 13 V15-V4, 5, 12, 13 Value 20 20 1.5 1.5 150 -40, +150 Unit V V A A o o Positive Output Current (source current) Negative Output Current (sink current) Operating Junction Temperature Storage Temperature C C THERMAL DATA Rth (j-c) R th (j-a)* Junction-case Thermal Resistance Junction-ambient Thermal Resistance 15 50 o o C/W C/W * Soldered on a 35µm, 40cm 2 board copper area Figure 1 : Maximum Power Dissipation 4 3 50 o C/W 2 1 o T AMB ( C) 2262-03.EPS P tot (W) 0 50 100 150 RECOMMENDED OPERATING CONDITIONS Symbol VCC IOUT+ IOUTIOUT+ IOUTfoper VIN ROSC COSC C1 C2 C2/C1 Tamb Power Supply Positive Output Current (source current) Negative Output Current (sink current) Average Positive Output Current Average Negative Output Current Operating