TNY264PN Power Integrations, TNY264PN Datasheet - Page 7

IC OFFLINE SWIT OTP OCP HV 8DIP

TNY264PN

Manufacturer Part Number
TNY264PN
Description
IC OFFLINE SWIT OTP OCP HV 8DIP
Manufacturer
Power Integrations
Series
TinySwitch®-IIr
Datasheets

Specifications of TNY264PN

Output Isolation
Isolated
Frequency Range
124 ~ 140kHz
Voltage - Output
700V
Power (watts)
9W
Operating Temperature
-40°C ~ 150°C
Package / Case
8-DIP (0.300", 7.62mm), 7 Leads
Output Voltage
5.8 V
Input / Supply Voltage (max)
265 VAC
Input / Supply Voltage (min)
85 VAC
Duty Cycle (max)
68 %
Switching Frequency
132 KHz
Supply Current
225 uA
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
Through Hole
Supply Voltage
265VAC
Digital Ic Case Style
DIP
No. Of Pins
8
No. Of Regulated Outputs
1
Filter Terminals
DIP
Rohs Compliant
Yes
On Resistance Rds(on)
28ohm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
596-1047-5
Figure 14. 2.5 W Constant Voltage, Constant Current Battery Charger with Universal Input (85-265 VAC).
reducing the no-load power consumption and improving full-
load effi ciency.
Current Limit Operation
Each switching cycle is terminated when the DRAIN current
reaches the current limit of the TinySwitch-II. Current limit
operation provides good line ripple rejection and relatively
constant power delivery independent of input voltage.
BYPASS Pin Capacitor
The BYPASS pin uses a small 0.1 μF ceramic capacitor for
decoupling the internal power supply of the TinySwitch-II.
Application Examples
The TinySwitch-II is ideal for low cost, high effi ciency power
supplies in a wide range of applications such as cellular phone
chargers, PC standby, TV standby, AC adapters, motor
control, appliance control and ISDN or a DSL network
termination. The 132 kHz operation allows the use of a low
cost EE13 or EF12.6 core transformer while still providing good
effi ciency. The frequency jitter in TinySwitch-II makes it
possible to use a single inductor (or two small resistors for
under 3 W applications if lower effi ciency is acceptable) in
conjunction with two input capacitors for input EMI fi ltering.
The auto-restart function removes the need to oversize the
output diode for short circuit conditions allowing the design to
be optimized for low cost and maximum effi ciency. In charger
applications, it eliminates the need for a second optocoupler
and Zener diode for open loop fault protection. Auto-restart
www.powerint.com
85-265
VAC
1N4005
1N4005
Fusible
8.2 Ω
RF1
D1
D3
1N4005
1N4005
D2
D4
3.3 μF
400 V
C1
2.2 mH
1.2 kΩ
R1
L1
200 kΩ
3.3 μF
R2
400 V
C2
TinySwitch-II
TNY264
U1
1N4937
D6
C3
2.2 nF
D
S
EN/UV
BP
0.1 μF
C3
C8 680 pF
1
4
Y1 Safety
also saves the cost of adding a fuse or increasing the power
rating of the current sense resistors to survive reverse battery
conditions. For applications requiring undervoltage lock out
(UVLO), such as PC standby, the TinySwitch-II eliminates
several components and saves cost. TinySwitch-II is well
suited for applications that require constant voltage and
constant current output. As TinySwitch-II is always powered
from the input high voltage, it therefore does not rely on bias
winding voltage. Consequently this greatly simplifi es designing
chargers that must work down to zero volts on the output.
2.5 W CV/CC Cell-Phone Charger
As an example, Figure 14 shows a TNY264 based 5 V,
0.5 A, cellular phone charger operating over a universal input
range (85 VAC to 265 VAC). The inductor (L1) forms a π-fi lter
in conjunction with C1 and C2. The resistor R1 damps
resonances in the inductor L1. Frequency jittering operation of
TinySwitch-II allows the use of a simple π-fi lter described
above in combination with a single low value Y1-capacitor (C8)
to meet worldwide conducted EMI standards. The addition of
a shield winding in the transformer allows conducted EMI to be
met even with the output capacitively earthed (which is the
worst case condition for EMI). The diode D6, capacitor C3
and resistor R2 comprise the clamp circuit, limiting the leakage
inductance turn-off voltage spike on the TinySwitch-II DRAIN
pin to a safe value. The output voltage is determined by the
sum of the optocoupler U2 LED forward drop (~1 V), and Zener
diode VR1 voltage. Resistor R8 maintains a bias current
through the Zener diode to ensure it is operated close to the
Zener test current.
T1
LTV817
U2
8
5
1N5819
Shield
2N3904
D5
Q1
10 μF
10 V
47 Ω
C7
R9
1/2 W
1.2 Ω
22 Ω
330 μF
R4
R3
16 V
C5
100 Ω
R7
1/2 W
1 Ω
TNY263-268
R6
270 Ω
BZX79-
B3V9
3.9 V
100 μF
R8
VR1
35 V
C6
PI-2706-021809
500 mA
Rev. H 02/09
RTN
+ 5 V
7

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