TNY263-268
®
TinySwitch-II Family
Enhanced, Energy Effi cient, 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 fi lter 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 Effi cient
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
•
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
www.powerint.com
+
Optional
UV Resistor
Wide-Range
D
HV DC Input
EN/UV
TinySwitch-II
BP
S
-
Figure 1.
Typical Standby Application.
Output Power Table
230 VAC ± 15%
Product
3
Open
Adapter
1
Frame
TNY263 P/G
5 W
7.5 W
TNY264 P/G
5.5 W
9 W
TNY265 P/G
8.5 W
11 W
TNY266 P/G
10 W
15 W
TNY267 P/G
13 W
19 W
TNY268 P/G
16 W
23 W
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.
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
signifi cantly reduce both the quasi-peak and average EMI,
minimizing fi ltering cost.
+
DC
Output
-
PI-2684-021809
85-265 VAC
Open
Adapter
1
2
2
Frame
3.7 W
4.7 W
4 W
6 W
5.5 W
7.5 W
6 W
9.5 W
8 W
12 W
10 W
15 W
February 2009