Pinout

TD1583 PDF Datasheet – 28V PWM Buck DC/DC Converter

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This post describes for the converter.

The Part Number is TD1583, TD1583P, TD1583PR.

The function of this semiconductor is PWM Buck DC/DC Converter.

The package is SOP-8 pin type

The manufacturer of this part is Techcode.

See the preview image and the PDF file for more information.

1 page
TD1583 pdf datasheet

Description

The TD1583 is a 380 KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 3A continuous output current over a wide input supply range with excellent load and line regulation.

The device includes a voltage reference, oscillation circuit, error amplifier, internal PMOS and etc. The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An enable function, an over current protection function and a short circuit protection function are built inside. An internal compensation block is built in to minimize external component count.

Features

1. 3A Constant Output Current

2. 80mΩ RDSON Internal Power PMOSFET Switch

3. Up to 95% Efficiency

4. Fixed 380KHz Frequency

5. Wide 3.6V to 28V Input Voltage Range

6. Output Adjustable from 1.222V to 26V

7. Built in Frequency Compensation

8. Built in Thermal Shutdown Function

9. Built in Current Limit Function

Pinouts

Pin Number Pin Name Description
1,6, 8 NC Not Connect.

2 Vin
Supply Voltage Input Pin. TD1583 operates from a 3.6V to 28V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input.

3 SW Power Switch Output Pin. SW is the switch node that supplies power to the output.

4 GND
Ground Pin. Care must be taken in layout. This pin should be placed outside of the Schottky Diode to output capacitor ground path to prevent switching current spikes from inducing voltage noise into TD1583.

5 FB
Feedback Pin. Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 1.222V.

7 EN
Enable Pin. EN is a digital input that turns the regulator on or off. Drive EN pin high to turn on the device, drive it low to turn it off.

TD1583 pinout

Applications:

1. Portable DVD

2. LCD Monitor / TV

3. Battery Charger

4. ADSL Modem

5. Telecom / Networking Equipment

TD1583 PDF Datasheet

WT7520 PDF – PC Power Supply PWM Supervisor

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Part Number: WT7520

Function: PC Power Supply PWM Supervisor

Package: DIP 16 Pin Type

Manufacturer: Weltrend Semiconductor

Images:WT7520 pinout datasheet

Description

The WT7520 is a pulse–width modulation (PWM) control circuit with complete protection circuits for used in the SMPS (Switched Mode Power Supply). It contains various functions, which are Over Voltage Protection, Under Voltage Protection, Power Good Output (PGO), Remote On/Off control and etc. It can minimize external components of switching power supply systems in personal computer.

Over Voltage Protection (OVP) monitors 3.3V, 5V, 12V and PT input voltage level. Under Voltage Protection (UVP) monitors 3.3V, 5V and 12V input voltage level. Power Good Output monitors the voltage level of power supply.

1. Voltage Monitoring: These ICs monitor the output voltages of the power supply, such as +12V, +5V, +3.3V, and others. They compare the monitored voltages with predefined thresholds and provide feedback to the control circuitry for voltage regulation.

2. Overvoltage and Undervoltage Protection: The PWM supervisor IC incorporates protection circuitry to detect overvoltage and undervoltage conditions. When these conditions occur, the IC triggers appropriate actions, such as shutting down the power supply or activating protective measures to prevent damage to the system.

3. Overcurrent Protection: These ICs monitor the current flowing through the power supply’s output circuits. If the current exceeds a predefined limit, the PWM supervisor IC can initiate protective measures, such as reducing the duty cycle of the PWM signal or shutting down the power supply.

Features

1. Complete PWM Control and Protection Circuitry

2. Over Voltage Protection for 3.3V / 5V / 12V / PT

3. Under Voltage Protection for 3.3V / 5V / 12V

4. 280ms PG Time Delay

5. Power Good Output is Open Drain Output

6. PWM Control Output are Open Drain Output

7. 280 mS Time Delay for UVP

8. Remote ON/OFF function De–bounce Time

9. Soft-Start function built-in

Block Diagram

WT7520 pdf

 

Absolute Maximum Ratings:

1. Supply voltage : VCC 5.5 V

2. Drain output voltage : Vcc1, Vcc2 5.5 V

3. Drain output current : Icc1, Icc2 200 mA

4. Power dissipation : Pd 200 mW

5. Operating temperature : Topr -10 ~ +70 ℃

6. Storage temperature: Tstg -65 ~ +150 ℃

 

Other data sheets are available within the file: WT7905, WT-7520

WT7520 PDF Datasheet