SGP400DZ Fairchild Semiconductor, SGP400DZ Datasheet
SGP400DZ
Specifications of SGP400DZ
Related parts for SGP400DZ
SGP400DZ Summary of contents
Page 1
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback FEATURES Linearly decreasing PWM frequency Green-mode under light-load and zero-load conditions Constant voltage (CV) and constant current (CC) No secondary feedback Low start-up current (8µA) Low operating current (3.6mA) Leading-edge blanking ...
Page 2
... Null=Regular package SGP400DP XXXXXXXX: Wafer Lot XXXXXXXXYWWV Y: Year WW: Week V: Assembly Location ORDERING INFORMATION Part Number PWM Frequency SGP400TZ 65KHz SGP400DZ 65KHz PIN DESCRIPTIONS Pin No. Name Type DIP-8 SOT-26 GATE 1 6 Driver Output The totem-pole output driver to drive the power MOSFET. VDD ...
Page 3
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback BLOCK DIAGRAM © System General Corp. Version 1.0.1 (IAO33.0084.B0) Product Specification - 3 - www.sg.com.tw • www.fairchildsemi.com SGP400 September 24, 2007 ...
Page 4
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback ABSOLUTE MAXIMUM RATINGS Symbol Parameter V DC Supply Voltage* VDD V FB Pin Input Voltage FB V Sense Pin Input Voltage SENSE P Power Dissipation (T =85° Thermal ...
Page 5
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback Current Sense Section Symbol Parameter t Propagation Delay PD V Current Limiting Valley Threshold Voltage STHVA V Current Limiting Flat Threshold Voltage STHFL t Leading-Edge Blanking Time LEB V Ramp LIMIT ...
Page 6
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback Output Section Symbol Parameter DCY Maximum Duty Cycle MAX V GATE Low Voltage GATE-L V GATE High Voltage GATE-H tr GATE Rising Time tf GATE Falling Time V GATE Output Clamping ...
Page 7
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback TYPICAL CHARACTERISTICS Turn-On Threashold Voltage ( Temperature DD-ON 18.0 17.5 17.0 16.5 16.0 -40 -25 - Temperature (℃) Startup Current ( ...
Page 8
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback Frequency ( Temperature OSC -40 -25 - Temperature (℃ Pin Input Voltage ( Temperature FB ...
Page 9
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback OPERATION DESCRIPTION SGP400 devices integrate many useful functions for low-power switch-mode power supplies. The following descriptions highlight key features of the SGP400. Start-up Current The required start-up current is only 8µA, ...
Page 10
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback Constant Output Power Limit When the SENSE voltage across the sense resistor, R reaches the threshold voltage (around 1.0V), the output GATE drive is turned off after a small propagation delay ...
Page 11
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback REFERENCE CIRCUIT 3W Flyback 5V/0.6A Circuit, without Secondary-Side Feedback BD1 CX1 GND GATE VDD 3 ...
Page 12
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback 3W Flyback 5V/0.6A Circuit, with Secondary-Side Feedback BD1 + SG6849 1 6 GND GATE VDD 3 4 ...
Page 13
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback PACKAGE INFORMATION 6 PINS-SOT ( Dimensions: Millimeters Symbol Min 0.90 b 0. 0.10 ...
Page 14
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback 8 PINS-DIP ( Dimensions: Millimeter Symbol Min 0.381 A2 3.175 9.017 E E1 6.223 e L 2.921 e 8.509 ...
Page 15
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback © System General Corp. Version 1.0.1 (IAO33.0084.B0) Product Specification - 15 - www.sg.com.tw • www.fairchildsemi.com SGP400 September 24, 2007 ...