Datasheet L6565 (STMicroelectronics)
| Hersteller | STMicroelectronics |
| Beschreibung | Quasi-Resonant SMPS Controller |
| Seiten / Seite | 17 / 1 — L6565. DIP8(Minidip). SO-8. ORDERING NUMBERS:. L6565N L6565D. … |
| Dateiformat / Größe | PDF / 256 Kb |
| Dokumentensprache | Englisch |
L6565. DIP8(Minidip). SO-8. ORDERING NUMBERS:. L6565N L6565D. DESCRIPTION. APPLICATIONS. BLOCK DIAGRAM
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L6565
QUASI-RESONANT SMPS CONTROLLER ■ QUASI-RESONANT (QR) ZERO-VOLTAGE- SWITCHING (ZVS) TOPOLOGY ■ LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE ■ FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY ■ PULSE-BY-PULSE & HICCUP-MODE OCP ■ ULTRA-LOW START-UP (< 70µA) AND
DIP8(Minidip) SO-8
QUIESCENT CURRENT (< 3.5mA) ■ DISABLE FUNCTION (ON/OFF CONTROL)
ORDERING NUMBERS:
■ 1% PRECISION (@ Tj = 25°C) INTERNAL
L6565N L6565D
REFERENCE VOLTAGE ■ ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
DESCRIPTION
■ BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT The L6565 is a current-mode primary controller IC,
APPLICATIONS
specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) fly- ■ TV/MONITOR SMPS back converters. ■ AC-DC ADAPTERS/CHARGERS Quasi-resonant operation is achieved by means of a ■ DIGITAL CONSUMER transformer demagnetization sensing input that trig- ■ PRINTERS, FAX MACHINES, gers MOSFET's turn-on. PHOTOCOPIERS AND SCANNERS
BLOCK DIAGRAM
COMP VFF 2 3 1 INV - LINE VOLTAGE FEEDFORWARD + 40K 2.5V 4 CS VOLTAGE 2 V 5pF REGULATOR - + - + 8 VCC Hiccup-mode VCC INTERNAL OCP SUPPLY R Q 20V R1 S Q 7 + GD UVLO DRIVER - R2 VREF2 Blanking Starter START STOP ZERO CURRENT DETECTOR + 2.1V BLANKING STARTER 1.6V - Hiccup-mode OCP DISABLE 5 6 ZCD GND January 2003 1/17
QUASI-RESONANT SMPS CONTROLLER ■ QUASI-RESONANT (QR) ZERO-VOLTAGE- SWITCHING (ZVS) TOPOLOGY ■ LINE FEED FORWARD TO DELIVER CONSTANT POWER vs. MAINS CHANGE ■ FREQUENCY FOLDBACK FOR OPTIMUM STANDBY EFFICIENCY ■ PULSE-BY-PULSE & HICCUP-MODE OCP ■ ULTRA-LOW START-UP (< 70µA) AND
DIP8(Minidip) SO-8
QUIESCENT CURRENT (< 3.5mA) ■ DISABLE FUNCTION (ON/OFF CONTROL)
ORDERING NUMBERS:
■ 1% PRECISION (@ Tj = 25°C) INTERNAL
L6565N L6565D
REFERENCE VOLTAGE ■ ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
DESCRIPTION
■ BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT The L6565 is a current-mode primary controller IC,
APPLICATIONS
specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) fly- ■ TV/MONITOR SMPS back converters. ■ AC-DC ADAPTERS/CHARGERS Quasi-resonant operation is achieved by means of a ■ DIGITAL CONSUMER transformer demagnetization sensing input that trig- ■ PRINTERS, FAX MACHINES, gers MOSFET's turn-on. PHOTOCOPIERS AND SCANNERS
BLOCK DIAGRAM
COMP VFF 2 3 1 INV - LINE VOLTAGE FEEDFORWARD + 40K 2.5V 4 CS VOLTAGE 2 V 5pF REGULATOR - + - + 8 VCC Hiccup-mode VCC INTERNAL OCP SUPPLY R Q 20V R1 S Q 7 + GD UVLO DRIVER - R2 VREF2 Blanking Starter START STOP ZERO CURRENT DETECTOR + 2.1V BLANKING STARTER 1.6V - Hiccup-mode OCP DISABLE 5 6 ZCD GND January 2003 1/17