NE5562N

Philips Semiconductors Product specification Switched-mode power supply control circuit NE/SE5562 DESCRIPTION The NE/SE5562 is a single-output control circuit for switched-mode power supplies. This single monolithic IC contains all control and protection features needed for full-featured switched-mode power supplies. The 100mA source/sink output is designed to drive power FETs directly. The associated output logic is designed to prevent double pulsing or cross-conduction current spiking on the output. All of the control and protect features work cycle-by-cycle up to the maximum operating frequency of 600kHz. For ease of interface, all digital inputs are TTL or CMOS compatible. The NE5562 is supplied in 20-pin glass/ceramic (Cerdip), plastic DIP, and plastic SO packages. The NE grade part is characterized and guaranteed over the commercial ambient temperature range of 0°C to +70°C and junction temperature range of 0°C to +85°C. The SE5562 is supplied in the glass/ceramic (Cerdip) package. The SE grade part is characterized and guaranteed over the ambient temperature range of -55 to +125°C and junction temperature range of -55 to +135°C. PIN CONFIGURATION D, F, N Packages FEED FORWARD 1 CT 2 RT 3 EXTERNAL MOD IN 4 DUTY CYCLE CONTROL 5 REMOTE ON/OFF 6 VI 7 20 GROUND 19 OUTPUT 18 DEMAG OVERVOLT IN 17 V S 16 C DELAY 15 OUT INVERT CONTROL 14 CURRENT SENSE 13 AUX COMP HYSTERESIS 12 AUX COMP INPUT 11 EXTERNAL SYNC IN TOP VIEW FEEDBACK VOLTAGE 8 VZ 9 ERROR AMP OUT 10 SL00388 Figure 1. Pin Configuration FEATURES • Stabilized power supply • Temperature-compensated reference source • Sawtooth generator • Pulse width modulator • Remote on/off switching • Current limiting (2 levels) ORDERING INFORMATION DESCRIPTION 20-Pin Plastic Small Outline (SO) Package 20-Pin Plastic Dual In-Line Package (DIP) 20-Pin Ceramic Dual In-Line Package (CERDIP) • Auxiliary comparator, with adjustable hysteresis • Loop fault protection • Demagnetization/overvoltage protection • Duty cycle adjust and clamp • Feed-forward control • External synchronization • Total shutdown after adjustable number of overcurrent faults • Soft-start TEMPERATURE RANGE 0 to +70°C 0 to +70°C -55°C to +125°C ORDER CODE NE5562D NE5562N SE5562F DWG # 1021B SOT146-1 SOT146-1 1994 Aug 31 1 853-0811 13721 Philips Semiconductors Product specification Switched-mode power supply control circuit NE/SE5562 BLOCK DIAGRAM FEEDFORWARD + + 1 11 EXTERNAL SYNC IN – + 3 2 OFF – + S CLOCK OSC Q LATCH R DELAYED CLOCK OSCILLATOR OFF 1.5V ON – + ON/OFF COMP S OUTPUT Q LATCH R OC1 POWR OUTPUT NOR OUTPUT 19 OUTPUT INVERT CONTROL 15 0V DEMAG/OV IN 18 3.80V NORM DEMAG/OV COMP TIME DELAY ON REMOTE ON/OFF 6 ERROR AMP OUT 10 3.80V FEEDBACK 8 VOLTAGE + – ERROR AMP – + LOOP FAULT COMP EXTERNAL MOD 4 IN DUTY CYCLE CONTROL 5 CLOCK 2k + – – – PWM COMP 0.955V NORM –+ 0.528V 0.645V OVERCURRENT 2 COMP –+ 0.955V – + SLOW OC1 START 0C2 COMP OC2 R NORM START/ STOP Q LATCH S LV STOP Q TRIP 3.80V NORM SHUT DOWN LATCH S R LOW BULK VI 7 3.80V 0.528V 0.645V POWER SUPPLY CKTS 0.955V GND 20 VS 17 VZ 9 OVERCURRENT 1 COMP CURRENT SENSE 14 OC CHARGE PUMPS 1:1 1:1 OC1-2 LATCHES CDELAY 16 +V OC1 1 µA 11µA +V OC2 80µA – + OC ACCUM COMP AUXILIARY COMP HYSTERESIS 13 NORM BULK SENSE 3.80V + – COMP –+ AUXILIARY COMP INPUT 12 3.80V SL00389 Figure 2. Block Diagram 1994 Aug 31 2 Philips Semiconductors Product specification Switched-mode power supply control circuit NE/SE5562 ABSOLUTE MAXIMUM RATINGS SYMBOL Supply VS ICC voltage-fed mode (Pin 17) current-fed mode (Pin 7) Output transistor output current Sync (Pin 11) Duty cycle control (Pin 5) Remote on/off (Pin 6) Output invert control (Pin 15) Feedback pin (Pin 8) CDELAY (Pin 16) External mod in (Pin 4) FF Feed-forward (Pin 1) Demag/overvoltage in (Pin 18) Current sense (Pin 14) 80Low supply sense and hysteresis (Pins 12, 13) TJ TSTG TSOLD Operating junction temperature Storage temperature range Lead soldering temperature (10sec) VS VZ VS VS VZ VZ VS VS VZ VS VS 135 -65 to +150 300 V V V V V V V V V V V °C °C °C 16 30 100 V mA mA PARAMETER RATING UNIT NOTES: 1. Ground Pin 20 must always be the most negative pin. 2. For power dissipation, see the application section which follows. RECOMMENDED OPERATING CONDITIONS SYMBOL Supply voltage-fed current-fed TA Ambient temperature range NE grade SE grade TJ Junction temperature range NE grade SE grade 0 to +85 -55 to +135 °C °C 0 to +70 -55 to +125 °C °C 10 to 16 15 V mA PARAMETER RATING UNIT DC AND AC ELECTRICAL CHARACTERISTICS VCC = 12V, specifications apply over temperature, unless otherwise specified. SYMBOL PARAMETER TEST PINS TEST CONDITIONS SE5562 Min 3.76 3.72 Typ 3.80 3.8 30 0.5 Max 3.84 3.90 Min 3.76 3.725 NE5562 Typ 3.80 3.8 30 0.5 Max 3.84 3.870 UNIT Internal reference VREF VREF Reference voltage Reference voltage Temperature stability Long-term stability Internal Internal Internal Internal TA=25°C Over temp. V V ppm/°C µV/1000 hrs 1994 Aug 31 3 Philips Semiconductors Product specification Switched-mode power supply control circuit NE/SE5562 DC AND AC ELECTRICAL CHARACTERISTICS (Continued) VCC = 12V, specifications apply over temperature, unless otherwise specified. SYMBOL PARAMETER TEST PINS TEST CONDITIONS SE5562 Min Typ Max Min NE5562 Typ Max UNIT Reference VZ VZ ∆VZ/ ∆T Zener voltage Zener voltage Temperature stability Comparator threshold voltage Comparator threshold voltage Hysteresis 9 9 9 IL=7mA, TA=25°C IL=7mA, Over temp. IL