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L6565DTR 开关控制器 ST
L6565DTR
ST(意法半导体)
: 70 kHz
: 1 Output
: - 40 C
: + 150 C
相关产品
产品信息
L6565DTR
开关控制器 Current-Mode Pri Cnt
QUASI-RESONANT SMPS CONTROLLER
DESCRIPTION L6565DTR
The L6565DTR 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.
■ 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 L6565DTR
■ TV/MONITOR SMPS
■ AC-DC ADAPTERS/CHARGERS
■ DIGITAL CONSUMER
■ PRINTERS, FAX MACHINES,
PHOTOCOPIERS AND SCANNERS
