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| IP1526 SERIES TOP VIEW +ERROR 1 -ERROR 2 COMPENSATION 3 CSOFTSTART 4 RESET 5 -CURRENT SENSE 6 +CURRENT SENSE 7 SHUTDOWN 8 R TIMING 9 18 17 16 15 14 13 12 11 10 VREF +VIN OUTPUT B GROUND +VCOLLECTOR OUTPUT A SYNC R DEADTIME C TIMING REGULATING PULSE WIDTH MODULATOR FEATURES * * * * * * * * * * * * * * 8 to 35V operation 5V reference trimmed to 1% 1Hz to 400kHz oscillator range Dual 100mA source/sink outputs Digital current limiting Double pulse suppression Programmable deadtime Undervoltage lockout Single Pulse metering Programmable soft start Wide current limit common mode range TTL/CMOS compatible logic ports Symmetry correction capability Guaranteed 6 unit synchronisation J Package - 18 Pin Ceramic DIP N Package - 18 Pin Plastic DIP DW Package - 18 Pin Plastic (300) SOIC Order Information Part J-Pack N-Pack D-18 Temp. Number 18 Pin 18 Pin 18 Pin Range IP1526 -55 to +125C IP3526 0 to +70C Note: To order, add the package identifier to the part number. eg. IP1526J IP3526DW-18 ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated) +VIN Input Voltage Collector Supply Voltage Logic Inputs Analogue Inputs Source / Sink Load Current Reference Load Current Logic Sink Current PD PD TJ TSTG TL Power Dissipation Power Dissipation TA = 25C Derate @ TA > 50C TC = 25C Derate @ TC > 25C +40V +40V -0.3 to +5.5V -0.3 to +VIN 200mA Internally Limited 15mA 1W 10mW/C 3W 24mW/C See Ordering Information -65 to +150C (soldering, 10 seconds) Fax +44(0)1455 552612. Website: http://www.semelab.co.uk Operating Junction Temperature Storage Temperature Range Lead Temperature Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk +300C 4/99 Semelab plc. IP1526 SERIES DESCRIPTION The IP1526 and IP3526 high performance monolithic pulse width modulator circuits are designed for fixed-frequency switching regulators and other power control applications. Included in an 1 8-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and steering logic, and two low impedance power drivers. Also included are protective features such as soft-start and under-voltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. BLOCK DIAGRAM +ERROR 1 -ERROR 2 COMPENSATION 3 CSOFTSTART 4 RESET 5 -CURRENT SENSE 6 +CURRENT SENSE 7 SHUTDOWN 8 R TIMING 9 18 17 16 15 14 13 12 11 10 VREF +VIN OUTPUT B GROUND +VCOLLECTOR OUTPUT A SYNC R DEADTIME C TIMING RECOMMENDED OPERATING CONDITIONS VIN Input Voltage Collector Voltage Sink/Source Load Current (Each Output) Reference Load Current Oscillator Frequency Range RT CT Oscillator Timing Resistor Oscillator Timing Capacitor Available Deadtime Range @ 40kHz Operating Ambient Temperature Range IP1526 IP3526 +8 to +35V +4.5 to +35V 0 to 100mA 0 to 20mA 1Hz to 400kHz 2k to 150k 470pF to 20F 3% to 50% -55 to +125C 0 to +70C Semelab plc. Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk Fax +44(0)1455 552612. Website: http://www.semelab.co.uk 4/99 IP1526 SERIES ELECTRICAL CHARACTERISTICS (TJ = Over Operating Temperature Range unless otherwise stated) Parameter Output Voltage Line Regulation Load Regulation Temperature Stability Total Output Voltage Range Short Circuit Current VREF = 0 4.9 25 Test Conditions Min. 4.95 IP1526 Typ. Max. 5.0 2 5 15 5.0 80 5.05 20 30 50 5.1 140 Min. 4.9 IP3526 Typ. Max. 5.0 2 5 15 5.1 30 50 50 5.15 140 Units V mV mV V mA REFERENCE SECTION TJ = 25C VIN = 8 to 35V IL = 0 to 20mA 4.85 25 5.0 80 UNDERVOLTAGE LOCKOUT RESET Output Voltage VREF = 3.8V VREF = 4.8V 2.4 0.2 4.8 0.4 2.4 0.2 4.8 0.4 V OSCILLATOR SECTION 2 Initial Accuracy Voltage Stability Temperature Stability Minimum Frequency Maximum Frequency Sawtooth Peak Voltage Sawtooth Valley Voltage RT = 150k RT = 2k VIN = 35V VIN = 8V RS 2k TJ = 25C 0.5 CT = 0.2F CT = 470pF 400 3 1 3.5 TJ = 25C VIN = 8 to 35V 3 0.5 3 8 1 10 100 400 3 1 3.5 3 0.5 7 8 1 10 100 Hz kHz V % ERROR AMPLIFIER SECTION 3 Input Offset Voltage Input Bias Current Input Offset Current DC Open Loop Gain High Output Voltage RL 10M VPIN1 - VPIN2 150mV ISOURCE = 100A VPIN1 - VPIN2 150mV ISINK = 100A RS 2k VIN = 12V to 18V 70 66 64 3.6 2 -350 35 72 4.2 5 -1000 100 60 3.6 2 -350 35 72 4.2 10 -2000 200 mV nA dB V Low Output Voltage Common Mode Rejection Supply Voltage Rejection 0.2 94 80 0.4 70 66 0.2 94 80 0.4 V dB NOTES 1. Test Conditions unless otherwise stated: VIN = 15V for IP1526 TJ = -55 to +125C for IP3526 TJ = 0 to +70C 2. Oscillator / PWM Section Test Conditions: fOSC = 40kHz (RT = 4.12k , CT = 0.01F 1%, RD = 0) 3. Error Amplifier Section Test Condition: VCM = 0 to 5.2V Semelab plc. Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk Fax +44(0)1455 552612. Website: http://www.semelab.co.uk 4/99 IP1526 SERIES ELECTRICAL CHARACTERISTICS (TJ = Over Operating Temperature Range unless otherwise stated) Parameter Minimum Duty Cycle Maximum Duty Cycle Test Conditions Min. 2 IP1526 Typ. Max. 0 Min. IP3526 Typ. Max. 0 Units PWM COMPARATOR VPIN2 - VPIN1 150mV VPIN1 - VPIN2 150mV ISOURCE = 40A ISINK = 3.6mA VIH = 2.4V VIL = 0.4V 45 49 45 49 % DIGITAL PORTS (SYNC, SHUTDOWN & RESET) HIGH Output Voltage LOW Output Voltage HIGH Input Current LOW Input Current 2.4 4.0 0.2 -125 -225 0.4 -200 -360 2.4 4.0 0.2 -125 -225 0.4 -300 -500 V A CURRENT LIMIT COMPARATOR 4 Sense Voltage Input Bias Current RS 50 90 100 -3 110 -10 80 100 -3 120 -10 mV A V A SOFT-START SECTION Error Clamp Voltage CS Charging Current RESET = 0.4V RESET = 2.4V 50 5 0.1 100 0.4 150 50 0.1 100 0.4 150 OUTPUT DRIVERS (each output) HIGH Output Voltage ISOURCE = 20mA ISOURCE = 100mA ISINK = 20mA ISINK = 100mA VC = 40V CL = 1000pF CL = 1000pF 12.5 12 13.5 13 0.2 1.2 50 0.3 0.1 0.3 2.0 150 0.6 0.2 12.5 12 13.5 13 0.2 1.2 50 0.3 0.1 0.3 2.0 150 0.6 0.2 V LOW Output Voltage Collector Leakage Rise Time Fall Time V A s POWER CONSUMPTION Standby Current VIN = 35V RT = 4.12k SHUTDOWN = 0.4V 18 30 18 30 mA NOTES 1. Test Conditions unless otherwise stated: VIN = 15V for IP1526 TJ = -55 to +125C for IP3526 TJ = 0 to +70C 2. Oscillator / PWM Section Test Conditions: fOSC = 40kHz (RT = 4.12k , CT = 0.01F 1%, RD = 0) 3. Error Amplifier Section Test Conditions: VCM = 0 to 5.2V 4. Current Limit Comparator Section Test Conditions: VCM = 0 to 12V 5. Output Driver Section Test Conditions: VC = 15V Semelab plc. Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk Fax +44(0)1455 552612. Website: http://www.semelab.co.uk 4/99 IP1526 SERIES APPLICATIONS INFORMATION Push-Pull Configuration Single-Ended Configuration +VSUPPLY +VSUPPLY R1 14 R1 C1 T1 A 13 14 C1 T1 A 13 +VC Q1 R2 C2 +VC Q1 R2 C2 IP1526 B GND 15 16 IP1526 Q2 B GND 15 16 Q2 R3 R3 RETURN RETURN Driving N-Channel Power MOSFETs +15V 75 14 +VC A Q1 13 T1 IP1526 Q2 B GND 15 16 RETURN Semelab plc. Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk Fax +44(0)1455 552612. Website: http://www.semelab.co.uk 4/99 IP1526 SERIES TYPICAL PERFORMANCE CHARACTERISTICS Soft Start Time vs CS Output Driver Saturation Voltage Output Driver Deadtime vs RD Value Oscillator Period vs RT and CT Semelab plc. Telephone +44(0)1455 556565. E-mail: sales@semelab.co.uk Fax +44(0)1455 552612. Website: http://www.semelab.co.uk 4/99 |
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