Position: Home > DataSheet > Index S > SG3 Series > SG35254N, SG3525A, SG3525ACW

Low Cost Custom Prototype PCB Manufacturer

SG35254N, SG3525A, SG3525ACW

Table of contents:
Info of SG35254N
Info of SG3525A
Info of SG3525ACW

SG35254N, SG3525A, SG3525ACW Selling Leads, Datasheet

MFG:LINFINITY Package Cooled:DIP D/C:06+

SG35254N, SG3525A, SG3525ACW Datasheet download

Five Points

Part Number: SG35254N

MFG: LINFINITY

Package Cooled: DIP

D/C: 06+

Attentive hint

Want to post a buying lead? If you are not a member yet, please select the specific/related part number first and then fill the quantity and your contact details in the "Request for Quotation Form" on the left, and then click "Send RFQ".Your buying lead can then be posted, and the reliable suppliers will quote via our online message system or other channels soon.

How to buy ?

How long will receive a response.

Top Sellers:

TOP

SG3525A General Description

The SG1525A/1527A series of pulse width modulator integrated circuits are designed to offer improved performance and lower external parts count when usedto implement all types of switching power supplies. The on-chip +5.1 volt reference is trimmed to !à1% initial accuracy and the input common-mode range of the erro amplifier includes the reference voltage, eliminating external potentiometers and divider resistors. A Sync input to the oscillator allows multiple units to be slaved together, or a single unit to be synchronized to an external system clock. A single pin and the Discharge pin provides a wide range of deadtime resistor between the CT adjustment. These devices also feature built-in soft-start circuitry with only a timingcapacitor required externally. A Shutdown pin controls both the soft-start circuitry and the output stages, providing instantaneous turn-off with soft-start recycle for slow turn-on. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for input voltages less than that required for normal operation. Another unique feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The SG1525A output stage features NOR logic, giving a LOW output for an OFF state. The SG1527A utilizes OR logic which results in a HIGH output level when OFF.

SG3525A Maximum Ratings

Supply Voltage  (+Vin) .......................................................40V
Collector Supply Voltage (Vc) ...........................................   40V
Logic Inputs .......................................................   -0.3V to 5.5V
Analog Inputs .......................................................  -0.3V to Vin
Output Current, Source or Sink ...................................   500mA
Reference Load Current ...............................................    50mA
Oscillator Charging Current ............................................    5mA
Operating Junction Temperature Range
Hermetic (J, L Packages) .....................................             150
Plastic (N, DW Packages ) .......................................         150
Storage Temperature Range ..........................    -65 to 150
Lead Temperature (Soldering, 10 seconds) .................    300

Note 1. Values beyond which damage may occur.

SG3525A Features

8V to 35V operation
5.1V reference trimmed to ±1%
100Hz to 500KHz oscillator range
Separate oscillator sync terminal
Adjustable deadtime control
Internal soft-start
Input undervoltage lockout
Latching P.W.M. to prevent multiplepulses
Dual source/sink output drivers

SG3525A Typical Application

1. Use an external transistor or open-collector comparator to pul down on the Comp terminal. This will set the PWM latch turningoff both outputs. If the shutdown signal is momentary, pulse-by-pulse protection can be accomplished as the PWM latch wil be reset with each clock pulse.

2. The same results can be accomplished by pulling down on the Soft-Start terminal with the difference that on this pin, shutdownwill not affect the amplifier compensation network but must discharge any Soft-Start capacitor.

3. Apply a positive-going signal to the Shutdown terminal. This will provide most rapid shutdown of the outputs but will not immediately set the PWM latch if there is a Soft-Start capacitor.This capacitor will discharge but with a current of approxi-mately twice the charging current.

4. The shutdown terminal can be used to set the PWM latch on a pulse-by-pulse basis if there is no external capacitance on Soft-Start terminal. Slow turn-on may still be accomplished by applying an external capacitor, blocking diode, and charging resistor to the comp terminal. (See SG1524 Application Note).

Hotspot Suppliers Product

Product List A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9

MT58L64L18CT-10

Price: 4-6 USD

MT58L64L18CT-10 TQFP100
DL-7140-211M

Price: 5-6.5 USD

DL-7140-211M laser tube
74LVC74APG

Price: 4-5 USD

74LVC74APG - IC FLIP FLOP D-Type POS-EDG DUAL 14TSSOP
CY28346ZI-2

Price: 6.5-8 USD

CYPRESS - Clock Synthesizer with Differential CPU Outputs
PI5V330QEX

Price: 0.284-0.286 USD

PI5V330QEX Pericom Multiplexer Switch ICs
BSM300GA120DN2

Price: 1-2 USD

IGBT power module, Single switch, 1200 V, Collector-emitter voltage, 430A
SVA150XG04TB

Price: 1-2 USD

a-Si TFT-LCD, NEC, 228.096Hmm, 560V
PC354N1

Price: 0.124-0.2 USD

PC354N1T - Mini-flat Package, AC Input Type Photocoupler - Sharp Electrionic Components
RL1210JR-070R22L

Price: 0.177-0.178 USD

RL1210JR51-XX-BL - Thick Film Chip Resistor Low Ohmic - TAITRON Components Incorporated
STPS140A

Price: 0.053-0.055 USD

STPS140A - POWER SCHOTTKY RECTIFIER - STMicroelectronics
STA013

Price: 1.45-1.5 USD

STA013 - MPEG 2.5 LAYER III AUDIO DECODER - STMicroelectronics
SMBJ5347B

Price: 0.073-0.075 USD

SMBJ5347B - 5 Watt Surface Mount Silicon Zener Diodes - Micro Commercial Components