Anterwell Technology Ltd.
Large Original stock of IC Electronics Components, Transistors, Diodes etc.
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Icc + Iz: | 30 MA | Output Totem Pole Peak Current (2 µs): | ±700 MA |
---|---|---|---|
Analog Inputs & Outputs: | -0.3 To 7 V | Zero Current Detector: | 50 (source) -10 (sink) MA |
Junction Temperature Operating: | -40 To 150 °C | Storage Temperature: | -55 To 150 °C |
High Light: | electronics ic chip,integrated circuit components |
L6565
QUASI-RESONANT SMPS CONTROLLER
■ QUASI-RESONANT (QR) ZERO-VOLTAGESWITCHING (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 QUIESCENT CURRENT (< 3.5mA)
■ DISABLE FUNCTION (ON/OFF CONTROL)
■ 1% PRECISION (@ Tj = 25°C) INTERNAL REFERENCE VOLTAGE
■ ±400mA TOTEM POLE GATE DRIVER WITH UVLO PULL-DOWN
■ BLUE ANGEL, ENERGY STAR, ENERGY 2000 COMPLIANT
APPLICATIONS
■ TV/MONITOR SMPS
■ AC-DC ADAPTERS/CHARGERS
■ DIGITAL CONSUMER
■ PRINTERS, FAX MACHINES, PHOTOCOPIERS AND SCANNERS
DESCRIPTION
The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters.
Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET's turn-on.
Converter's power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant.
The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol | Pin | Parameter | Value | Unit |
---|---|---|---|---|
IVcc | 8 | ICC + IZ | 30 | mA |
IGD | 7 | Output Totem Pole Peak Current (2 µs) | ±700 | mA |
INV, COMP, VFF, CS | 1, 2, 3 4 | Analog Inputs & Outputs | -0.3 to 7 | V |
IZCD | 5 | Zero Current Detector | 50 (source) -10 (sink) | mA |
Ptot |
Power Dissipation @Tamb = 50°C (Minidip) (SO8) |
1 0.65 |
W | |
TJ | Junction Temperature Operating range | -40 to 150 | °C | |
TSTG | Storage Temperature | -55 to 150 | °C |
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