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 under-voltage 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
+
Optional
UV Resistor
®
+
DC Output
-
Wide-Range
HV DC Input
D
EN/UV
BP
TinySwitch-II
S
-
PI-2684-101700
Figure 1. Typical Standby Application.
OUTPUT POWER TABLE
230 VAC
±
15%
PRODUCT
(3)
85-265 VAC
Adapter
(1)
Open Adapter
(1)
Open
Frame
(2)
Frame
(2)
TNY263P or G
TNY264P or G
TNY265P or G
TNY266P or G
TNY267P or G
TNY268P or G
EcoSmart
–Extremely Energy Efficient
• No load consumption < 50 mW with bias winding and
< 250 mW without bias winding at 265 VAC input
• Meets Blue Angel, Energy Star, and EC 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
®
5W
5.5 W
8.5 W
10 W
13 W
16 W
7.5 W
9W
11 W
15 W
19 W
23 W
3.7 W
4W
5.5 W
6W
8W
10 W
4.7 W
6W
7.5 W
9.5 W
12 W
15 W
Table 1.
Notes:
1.
Typical continuous power in a non-ventilated enclosed
adapter measured at 50
°C
ambient.
2.
Maximum 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. 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 under-voltage 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 under-voltage 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.
April 2004
POWERINT [ POWER INTEGRATIONS, INC. ]
