 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TNY253 Datasheet(PDF) 2 Page - Power Integrations, Inc. |
|
|
|||||||||||||||||||||||||||||
TNY253 Datasheet(HTML) 2 Page - Power Integrations, Inc. |
|
|
2 / 18 page  Rev. F 08/16 2 www.power.com TNY253/254/255 TNY253/254/255 Figure 2. Functional Block Diagram. Figure 3. Pin Configuration. Pin Functional Description DRAIN (D) Pin: Power MOSFET drain connection. Provides internal operating current for both start-up and steady-state operation. BYPASS (BP) Pin: Connection point for an external bypass capacitor for the inter- nally generated 5.8 V supply. Bypass pin is not intended for sourcing supply current to external circuitry. ENABLE (EN) Pin: The power MOSFET switching can be terminated by pulling this pin low. The I-V characteristic of this pin is equivalent to a voltage source of approximately 1.5 V with a source current clamp of 50 µA. SOURCE (S) Pin: Power MOSFET source connection. Primary return. TinySwitch Functional Description TinySwitch is intended for low power off-line applications. It combines a high-voltage power MOSFET switch with a power supply controller in one device. Unlike a conventional PWM (Pulse Width Modulator) controller, the TinySwitch uses a simple ON/OFF control to regulate the output voltage. The TinySwitch controller consists of an Oscillator, Enable (Sense and Logic) circuit, 5.8 V Regulator, Undervoltage circuit, Hysteretic Over Temperature Protection, Current Limit circuit, Leading Edge Blanking, and a 700 V power MOSFET. Figure 2 shows a functional block diagram with the most important features. Oscillator The oscillator frequency is internally set at 44 kHz (130 kHz for the TNY255). The two signals of interest are the Maxi- mum Duty Cycle signal (D MAX) which runs at typically 67% duty cycle and the Clock signal that indicates the beginning of each cycle. When cycles are skipped (see below), the oscilla- tor frequency doubles (except for TNY255 which remains at 130 kHz). This increases the sampling rate at the ENABLE pin for faster loop response. Enable (Sense and Logic) The ENABLE pin circuit has a source follower input stage set at 1.5 V. The input current is clamped by a current source set at 50 µA with 10 µA hysteresis. The output of the enable sense PI-2197-061898 CLOCK OSCILLATOR 5.8 V 5.1 V SOURCE S R Q DCMAX BYPASS + - VILIMIT LEADING EDGE BLANKING THERMAL SHUTDOWN + - DRAIN REGULATOR 5.8 V UNDERVOLTAGE 1.5 V + VTH ENABLE Q 50 A PI-2199-031501 ENABLE 8 5 7 6 DRAIN SOURCE SOURCE SOURCE 1 4 2 3 SOURCE SOURCE BYPASS P Package (DIP-8) G Package (SMD-8) |
Similar Part No. - TNY253_V01 |
|
Similar Description - TNY253_V01 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
