IP5661C SEME-LAB | Alldatasheet
Document overview
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Technical content
SWITCHED–MODE POWER SUPPLY CONTROL CIRCUIT
FEATURES
- STABILISED POWER SUPPLY
- TEMPERATURE COMPENSATED REFERENCE SOURCE
- SAWTOOTH GENERATOR
- PULSE WIDTH MODULATOR
- CURRENT LIMITING
- 8 PIN DIP SUPPLY Voltage Sourced Current Sourced OUTPUT TRANSISTOR Output Current Collector Voltage (Pin 7) T J Operating Junction Temperature TSTG Storage Temperature Range 18V 30mA 40mA 18V See Ordering Information –55 to +150°C ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C unless otherwise stated) TOP VIEW J Package – 8 Pin Ceramic DIP N Package – 8 Pin Plastic DIP D Package – 8 Pin Plastic (150) SOIC OUTPUT FEEDBACK GAIN GND CURRENT SENSE VZ VCC RT/CT Part J–Pack N–Pack D–8 Temp. Number 8 Pin 8 Pin 8 Pin Range IP5561 ✔ -55 to +125°C IP5561C ✔✔✔ 0 to +70°C Order Information Note: To order, add the package identifier to the part number. eg. IP5561J IP5561CD–8 GAIN SAWTOOTH GENERATOR LATCH S R 0.5V CURRENT SENSE STABILISED SUPPLY GND CCV zV FEEDBACK ERROR AMP PWM TCTR REFERENCE VOLTAGE CCV OUTPUT 8.2V BLOCK DIAGRAM
DESCRIPTION
The IP5561 is a control circuit for use in switched mode power supplies. This single monolithic chip incorporates all the control and supervisory (protection) functions required in switched mode power supplies, including an internal temperature compensated reference source, internal zener reference, sawtooth generator, pulse width modulator, output stage and cycle by cycle current limit.
Internal Reference Voltage (VREF ) Temperature Coefficient of VREF Internal Reference (VZ) Temperature Coefficient of VZ Frequency Range Initial Accuracy Oscillator Duty Cycle Range I IN Single Pulse Inhibit Delay Current Limit Trip Level Output Voltage Swing (VOH ) Output Voltage Swing (VOL ) Open Loop Gain Feedback Resistor Small Signal Bandwidth V CE(sat) Output Current Supply Current (ICC ) Supply Voltage (VCC ) Pin 1 Threshold TJ = Over Temp. Range IL = -7mA TJ = Over Temp. Range fO = 20kHz Vpin6= 250mV TJ = Over Temp. Range Inhibit Delay Time IOUT = 20mA for 20% overdrive I OUT = 40mA IC = 20mA T J = Over Temp. Range TJ = Over Temp. Range IZ = 0, Voltage Fed TJ = Over Temp. Range ICC = 10mA, Voltage Fed ICC = 30mA, Voltage Fed 3.69 3.75 3.84 3.65 3.88 ±100 7.8 8.2 8.8 ±200 50 100k 0–90 0–98 –2 –10 -20 0.88 1.10 0.7 0.8 0.40 0.50 0.60 6.2 0.7 10k 0.4 20 21 22 20 30 8 9 10.5 LAB SEME IP5661C IP5561C V ppm/°C V ppm/°C Hz µA µs V V dB Ω MHz V mA mA V V 3.57 3.75 3.96 3.55 3.98 ±100 7.8 8.2 8.8 ±200 50 100k 0–90 0–98 –2 –10 -20 0.88 1.10 0.7 0.8 0.40 0.50 0.60 6.2 0.7 10k 0.4 19 21 24 20 30 8 9 10.5 IP5561 IP5561C ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise stated) CURRENT LIMITING ERROR AMPLIFIER REFERENCE SECTIONS OSCILLATOR SECTION OUTPUT STAGE SUPPLY VOLTAGE/CURRENT NOTES 1) Test Conditions: VCC = 12V , TJ = 25°C unless otherwise stated 2) Tests marked TJ = Over Temp. Range apply over the full temperature range ie. T J = -55 to +125°C for IP5561 TJ = 0 to +70°C for IP5561C LOW SUPPLY PROTECTION
FREQUENCY (Hz) -180 -150 -120 -90 -60 -30 1k 10k 100k 1M 10M PHASE ANGLE (˚) FREQUENCY (Hz) 1k 10k 100k 1M 10M GAIN (dB) TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER Open Loop Phase Open Loop Gain δ – DUTY CYCLE (%) 0123456 100 V Pin 4 δ – MAXIMUM DUTY CYCLE (%)MAX 012345 100 V Pin 1 Transfer Curve of Pulse Width Modulator Duty Cycle vs Input Voltage Maximum Duty Cycle vs Base Voltage on Q1
R 2δmax = f V Z + VBE Q1R 1+R 2() LAB SEME IP5661C IP5561C TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER Power Derating Curve Slow Start Voltage Typical Frequency Plot vs RT and CT Start-up Circuit (Optional) T AMBIENT TEMPERATURE (˚C)A P MAX (W)D 25 50 75 100 125 150 0.00 0.25 0.50 0.75 1.00 t = R'C PIN4V t OSCILLATOR FREQUENCY (kHz) 100 200 TIMING CAPACITANCE (nF) 2 2.5 3 3.5 4 4.5 R = 5kΩ R = 10kΩ R = 20kΩ R = 40kΩ 51.5 PD =V CC ICC + ( VCC – VZ ) IZ + ( Vpin7Ipin7x δ ) C ZV IP5561 TC TR IP5561