TNY263-268
TinySwitch-II
Family
®
Enhanced, Energy Efficient, Low Power
Off-line Switcher
Product Highlights
+
TinySwitch-II Features Reduce System Cost
•
Fully integrated auto-restart for short circuit and open loop fault
protection – saves external component costs
•
Built-in circuitry practically eliminates audible noise with ordinary
dip-varnished transformer
•
Programmable line undervoltage detect feature prevents power
on/off glitches – saves external components
•
Frequency jittering dramatically reduces EMI (~10 dB)
– minimizes EMI filter component costs
•
132 kHz operation reduces transformer size – allows use of
EF12.6 or EE13 cores for low cost and small size
•
Very tight tolerances and negligible temperature variation on key
parameters eases design and lowers cost
•
Lowest component count switcher solution
•
Expanded scalable device family for low system cost
Better Cost/Performance over RCC & Linears
•
Lower system cost than RCC, discrete PWM and other
integrated/hybrid solutions
•
Cost effective replacement for bulky regulated linears
•
Simple ON/OFF control – no loop compensation needed
•
No bias winding – simpler, lower cost transformer
•
Simple design practically eliminates rework in manufacturing
EcoSmart – Extremely Energy Efficient
•
No load consumption <50 mW with bias winding and
<250 mW without bias winding at 265 VAC input
•
Meets California Energy Commission (CEC), Energy Star, and
EU requirements
•
Ideal for cell-phone charger and PC standby applications
High Performance at Low Cost
•
High voltage powered – ideal for charger applications
•
High bandwidth provides fast turn on with no overshoot
•
Current limit operation rejects line frequency ripple
•
Built-in current limit and thermal protection improves safety
®
+
Optional
UV Resistor
DC
Output
-
Wide-Range
HV DC Input
TinySwitch-II
S
D
EN/UV
BP
-
PI-2684-021809
Figure 1.
Typical Standby Application.
Output Power Table
230 VAC ± 15%
Product
3
85-265 VAC
Adapter
1
3.7 W
4W
5.5 W
6W
8W
10 W
Open
Frame
2
4.7 W
6W
7.5 W
9.5 W
12 W
15 W
Adapter
1
5W
5.5 W
8.5 W
10 W
13 W
16 W
Open
Frame
2
7.5 W
9W
11 W
15 W
19 W
23 W
TNY263 P/G
TNY264 P/G
TNY265 P/G
TNY266 P/G
TNY267 P/G
TNY268 P/G
Table 1. Output Power Table.
Notes:
1. Minimum continuous power in a typical non-ventilated enclosed adapter
measured at 50 °C ambient.
2. Minimum practical continuous power in an open frame design with adequate
heat sinking, measured at 50 °C ambient (See Key Applications
Considerations).
3. Packages: P: DIP-8B, G: SMD-8B. Please see Part Ordering Information.
Description
TinySwitch-II integrates a 700 V power MOSFET, oscillator, high
voltage switched current source, current limit and thermal
shutdown circuitry onto a monolithic device. The start-up and
operating power are derived directly from the voltage on the
DRAIN pin, eliminating the need for a bias winding and
associated circuitry. In addition, the TinySwitch-II devices
incorporate auto-restart, line undervoltage sense, and frequency
jittering. An innovative design minimizes audio frequency
components in the simple ON/OFF control scheme to practically
eliminate audible noise with standard taped/varnished
transformer construction. The fully integrated auto-restart circuit
safely limits output power during fault conditions such as output
short circuit or open loop, reducing component count and
secondary feedback circuitry cost. An optional line sense resistor
externally programs a line undervoltage threshold, which
eliminates power down glitches caused by the slow discharge of
input storage capacitors present in applications such as standby
supplies. The operating frequency of 132 kHz is jittered to
significantly reduce both the quasi-peak and average EMI,
minimizing filtering cost.
www.powerint.com
February 2009
POWERINT [ POWER INTEGRATIONS, INC. ]
