TNY254GN
TNY254GN is Low Power Off-line Switcher manufactured by Power Integrations.
- Part of the TNY255GN comparator family.
- Part of the TNY255GN comparator family.
Description
The Tiny Switch family uses a breakthrough design to provide the lowest cost, high efficiency, off-line switcher solution in the 0 to 10 W range. These devices integrate a 700 V power MOSFET, oscillator, high-voltage switched current source, current limit and thermal shutdown circuitry. They start-up and run on power derived from the DRAIN voltage, eliminating the need for a transformer bias winding and the associated circuitry. And yet, they consume only about 80 m W at no load, from 265 VAC input. A simple ON/OFF control scheme also eliminates the need for loop pensation.
+
Wide-Range High-Voltage
DC Input
- Tiny Switch
D EN BP
Figure 1. Typical Standby Application.
+ DC Output
- PI-2178-022699
Tiny Switch Selection Guide
ORDER PART
NUMBER
TNY253P TNY253G TNY254P TNY254G TNY255P TNY255G
PACKAGE
DIP-8 SMD-8 DIP-8 SMD-8 DIP-8 SMD-8
Remended Range for Lowest System Cost-
230 VAC or 115 VAC w/Doubler
85-265 VAC
0-4 W
0-2 W
2-5 W
1-4 W
4-10 W 3.5-6.5 W
Table 1.
- Please refer to the Key Application Considerations section for details.
The TNY253 and TNY254 switch at 44 k Hz to minimize EMI and to allow a simple snubber clamp to limit DRAIN spike voltage. At the same time, they allow use of low cost EE16 core transformers to deliver up to 5 W. The TNY253 is identical to TNY254 except for its lower current limit, which reduces output short-circuit current for applications under 2.5 W. TNY255 uses higher switching rate of 130 k Hz to deliver up to 10 W from the same low cost EE16 core for applications such as PC standby supply. An EE13 or EF13 core with...
