LR5810 Datasheet, PDF (1/6 Pages) Leshan Radio Company – he LR5810 series switcher ICs cost effectively replace all power supplies up to 5W

LR5810
LR5810
Description
The LR5810 series switcher ICs cost effectively rep lace all power supplies up to 5W output power based on
unregulated isolated linear transformer (50/60HZ). Unlike conventional PWM (pulse width modulation)
controllers, they regulate the output voltage in a new method of off-time modulation control. The controller
consists of a VCO (voltage control oscillator), Sense and logic circuit, VDD pin, under-voltage lockout circuit,
protection for over-voltage, current limited circuit, lead ing edge blanking, over load protection and fault condition
auto-restart. They are ideal low power AC/DC adapter/charger solution for portable devices,
Features
• Low start-up current: Typ.15 µA Max.25 µA
• UVLO(under voltage lockout):Typ.12V start-up Typ.6V shut-down
• Low operating current:Typ.2 mA Max.5 mA
• LEB(leading edge b lanking): Typ.300ns
• OVP(over voltage protection): Typ.28 V
• Operation Frequency: Typ.54KHZ(VDD=21V)
• Output Driver Ab ility: Typ.15 mA
• OLP(over load protection)
• Universal AC input range
• Constant voltage and constant current
• Small SOT-23-6 and SOP-8 package.
Applications
AC/DC adapter/charger for cell/cordless phones, digital cameras, MP3/portable audio devices
etc
• LED Lighting
• Replacements for linear transformers and RCC SMTPS
Package
1