FA13845

Features:

• CMOS process
• Low-power dissipation
• Standby current 2mA (max.), start-up current 30mA (max.)
• Pulse-by-pulse current limiting
• 5V bandgap reference
• UVLO (Undervoltage lockout) with hysteresis
• Maximum duty cycle  FA13842, 13843: 96%
                                    FA13844, 13845: 48%
• Pin-for-pin compatible with UC384X


Specifications

Item	Symbol	Test condition	Rating	Unit
Supply voltage	VCC	Low impedance source	28	V
		Zener clamp (Icc<10mA)	Self limiting	V
Zener current	IZ		10	mA
Output peak current	IO	Source current	400	mA
		Sink current	1	A
FB/ISNS terminal input voltage	VIN	FB, ISNS	0.3 to 5.3	V
Error amplifier sink current	ISINK		10	mA
Total power dissipation	Pd	at Ta < 50 DIP SOP	800 400	mW
Thermal resistance	Rj-a	Junction-air DIP SOP	125 250	/W
Junction temperature	Tj		150
Ambient temperature	Ta		25 to 85
Storage temperature	Tstg		40 to 150

Description

The FA1384X series are CMOS current mode control ICs for off-line and DC-to-DC converters.

These FA1384X series ICs can reduce start-up circuit loss and are optimum for high efficiency power supplies because of the low power dissipation achieved through changes in the CMOS fabrication process.

These FA1384X series ICs can drive a power MOSFET directly.

The high-performance, compact power supply can be designed with minimal external components .