TDA4718A Infineon Technologies, TDA4718A Datasheet
TDA4718A
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TDA4718A Summary of contents
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Control IC for Single-Ended and Push-Pull Switched-Mode Power Supplies (SMPS) Features Feed-forward control (line hum suppression) Push-pull outputs Dynamic output current limitation Overvoltage protection Undervoltage protection Soft start Double pulse suppression Type Ordering Code TDA 4718 A Q67000-Y639 Not for ...
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Pin Configuration (top view) Semiconductor Group 2 TDA 4718 A ...
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Pin Definitions and Functions Pin Symbol 1 GND COMP 5 I SYNC 6 IUV 7 IOV 8 – I DYN DYN REF ...
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Ramp Generator The ramp generator is triggered by the VCO and oscillates at the same frequency. The duration of the falling edge of the ramp generator waveform shorter than the fall time of the VCO. To control ...
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Comparator K3 Comparator K3 limits the voltage at capacitance The voltage at the ramp generator output may, however rise to 5.5 V. With a corresponding slope of the rising ramp generator edge, the duty cycle can ...
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Outputs Both outputs are transistors with open collectors and operate in a push-pull arrangement. They are active low. The time in which only one of the two outputs is conductive can be varied infinitely. The length of the falling edge ...
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Block Diagram Semiconductor Group 7 TDA 4718 A ...
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Absolute Maximum Ratings Parameter Supply voltage Voltage at Q1, Q2 Current at Q1, Q2 Sync output Sync input C Input filter R Input T C Input T R Input R C Input R Input comparator K2, K5, K6, K7 Output ...
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Operating Range Parameter Supply voltage Ambient temperature VCO frequency Ramp generator frequency Characteristics – Parameter Symbol Supply current I Reference V Reference voltage Reference voltage change ...
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Characteristics (cont’ – Parameter Symbol Oscillator (VCO) f Frequency range Frequency change Frequency change Tolerance t Fall time sawtooth t RC combination C VCO R Ramp ...
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Characteristics (cont’ – Parameter Symbol Comparator K2 Input current – Turn-OFF delay V Input voltage Common-mode input voltage range V Soft Start K3, K4 ...
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Characteristics (cont’ – Parameter Symbol Dynamic Current Limitation K7 Common-mode input V voltage range V Input offset voltage Input current – Turn-OFF delay time ...
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Dimensioning Notes for RC Network 1. Determination of the minimum time during which both outputs must be disabled C selection of 2. Determination of the VCO frequency = 2 x output frequency selection Determination of the rated ...
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Pulse Diagram Semiconductor Group 14 TDA 4718 A ...
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VCO Frequency versus Semiconductor Group R C and TDA 4718 A ...
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VCO Temperature Response max VCO with C as parameter ---------------- - Semiconductor Group 16 TDA 4718 A ...
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Current Consumption versus Temperature Semiconductor Group Output Current versus Output Voltage 17 TDA 4718 A ...