Data Sheet No. PD 96934A
•Small sized 8-pin DIP type full molded package, optimum IC for low-
•Off-timer circuit is provided on the monolithic control IC
• Low start-up circuit current (10uA typ)
•Low circuit current at operation (1.5mA typ)
• Avalanche energy guaranteed MOSFET with high VDSS
The built-in power MOSFET simplifies the surge absorption
circuit since the MOSFET guarantees the avalanche energy.
No VDSS de-rating is required.
•Built-in Start-up circuit (the power loss in the start-up circuit is
reduced by cutting off the start-up circuit after the IC starts its
•Auto Burst Stand-by (realizing input power<0.1W at no load)
•Auto Bias Function (stable burst operation without the interference on
•Two operational modes by auto switching functions
For normal operation: PRC mode
For stand-by operation (at light load): Burst mode
•Built-in Leading Edge Blanking Function
•Built-in constant voltage drive circuit
•Various kinds of protection functions
Pulse-by-pulse Overcurrent Protection (OCP)
Overload Protection with auto recovery (OLP)
Overvoltage Protection with latch mode (OVP)
Thermal Shutdown with latch mode (TSD)
8 Lead PDIP
85 to 264
IRIS-A6159 is a hybrid IC consisting of a power MOSFET and a controller IC, designed for PRC
fly-back converter type SMPS (Switching Mode Power Supply) applications, applicable for PRC
operation for small power SMPS. This IC realizes downsizing and standardizing of a power supply
system reducing external component count and simplifying the circuit design.
Note: PRC is abbreviation for “Pulse Ratio Control” (On-width control with fixed OFF-time).
Typical Connection Diagram
D D NC Startup
OCP Vcc GND FB
Note 1: The pout (W) represents the thermal rating at PRC Operation. The peak power output is obtained by
approximating 120 to 140% of the above listed value. When the output voltage is low and ON-duty is narrow, the
Pout (W) shall become lower than that of above value.
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