LX1562

Features:

INTERNAL START-UP CIRCUIT
INTERNAL CURRENT SENSE BLANKING
IMPROVED MICROPOWER START-UP CURRENT (300µA max.)
CLAMPED E.A. OUTPUT FOR LOWER TURN-ON OVERSHOOT
MULTIPLIER CLAMP LIMITS MAXIMUM INPUT CURRENT
INTERNAL OVERVOLTAGE PROTECTION REPLACES BUILT-IN C.S. OFFSET
PWM OUTPUT CLAMP LIMITS MOSFET GATE DRIVE VOLTAGE
INCREASED UVLO HYSTERESIS REDUCES START-UP TIMING (LX1562 only)
LOW OPERATING CURRENT CONSUMPTION
INTERNAL 1.5% REFERENCE
TOTEM POLE OUTPUT STAGE
AUTOMATIC CURRENT LIMITING OF BOOST STAGE
DISCONTINUOUS MODE OF OPERATION WITH NO CURRENT GAPS
NO SLOPE COMPENSATION REQUIRED


Application

ELECTRONIC BALLAST
SWITCHING POWER SUPPLIES


Pinout




Specifications

Supply Voltage (VIN) ...................................................................................... -0.3V to 28V
Peak Driver Output Current (Note 3) ................................................................. ±500mA
Driver Output Clamping Diodes
VO > VCC or VO < -0.3V ........................................................................................ ±10mA
Detector Clamping Diodes
VDET > 6V or VDET < 0.9V ..................................................................................... ±10mA
Error Amp, Multiplier, and Comparator Input Voltages ................................ -0.3V to 6V
Detector Input Voltage (Note 2) ....................................................................... -0.3 to 6V
Operating Junction Temperature
Plastic (M and DM Packages) ............................................................................... 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 Seconds) ............................................................ 300°C
Note 1. Values beyond which damage may occur. All voltages are specified with respect to
ground, and all currents are positive into the specified terminal.
Note 2. With no limiting resistor.
Note 3. Current duty cycle is chosen such that TJ is below 150°C.

Description

The LX1562 is a second-generation family of power factor correction controllers using a discontinuous mode
of operation. They are optimized for electronic ballast applications. Many improvements have been made over the original SG3561A controller introduced by Silicon General Semiconductor in 1992.