IL235Z
Features
• Operate from a rectified 220 VAC line source.
• Oscillation frequency: 600 kHz.
• Output voltage external setting (FB) type available.
FB terminal voltage (V
FB
) 1.0 V.
• Minimum of external components. The only peripheral
components that can be used with IC are a coil, a diode,
capacitors, and a resistor.
• Built-in converter of high voltage in low voltage, using 450 V
MOS-transistor and Zener diode.
• Built-in 700 V DMOS power switch.
• Duty ratio: 0% to 27% typ. PFM control
27% to 82% typ. PWM control
• Built-in current limiting circuit: Assigned by internal resistor (RSENSE).
• Soft-start function: Can be set with an external capacitor (C
SS
).
Block diagram
Vdd
Phase
compensation
circuit
Vdd
HV
TR1
DRAIN
Triangular wave
oscillation circuit
SENSE
TR2
R1
R2
Vz
Soft-start
circuit
ZD1
PWM/PFM switching
control circuit
Voltage/current
reference
Rs
Cs
RSENSE
SOURCE
120mV
FB
VREF=1.0V
СSS
СVREF
Vss
* - Pin number are defined during designing
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