DatasheetsPDF.com

KA3525A

Fairchild
Part Number KA3525A
Manufacturer Fairchild
Description SMPS CONTROLLER
Published Apr 25, 2005
Detailed Description KA3525A SMPS Controller www.fairchildsemi.com Features • 5V ±1% Reference • Oscillator Sync Terminal • Internal Soft S...
Datasheet PDF File KA3525A PDF File

KA3525A
KA3525A

Overview
KA3525A SMPS Controller www.
fairchildsemi.
com Features • 5V ±1% Reference • Oscillator Sync Terminal • Internal Soft Start • Deadtime Control • Under Voltage Lockout Description The KA3525A is a monolithic integrated circuit that includes all of the control circuits necessary for a pulse width modulating regulator.
There are a voltage reference, an error amplifier, a pulse width modulator, an oscillator, an under voltage lockout, a soft start circuit, and the output driver in the chip.
16-DIP Internal Block Diagram 1 VREF 16 VCC 15 GND 12 BAND GAP REF 5V U.
V.
L.
O.
EA(-) 1 EA(+) 2 EAOUT 9 _ ERR AMP + C8 (SOFT START) 5K 10 SHUT DOWN CT 5 7 5K DISCHARGE _ PWM COMP + LATCH SR OSCILLATOR F/F Q Q 36 SYNC RT 4 OSC OUTPUT VC 13 11 OUTPUT A 14 OUTPUT B ©2002 Fairchild Semiconductor Corporation Rev.
1.
0.
1 KA3525A Absolute Maximum Ratings Parameter Supply Voltage Collector Supply Voltage Output Current, Sink or Source Reference Output Current Oscillator Charging Current Power Dissipation (TA = 25°C) Operating Temperature Storage Temperature Lead Temperature (Soldering, 10sec) Symbol VCC VC IO IREF ICHG(OSC) PD TOPR TSTG TLEAD Value 40 40 500 50 5 1000 0 ~ +70 -65 ~ +150 +300 Unit V V mA mA mA m/W °C °C °C Electrical Characteristics (VCC = 20V, TA = 0 to +70°C, unless otherwise specified) Parameter REFERENCE SECTION Reference Output Voltage Line Regulation Load Regulation Short Circuit Output Current Total Output Variation (Note1) Temperature Stability (Note1) Long Term Stability (Note1) OSCILLATOR SECTION Initial Accuracy (Note1, 2) Frequency Change With Voltage Maximum Frequency Minimum Frequency Clock Amplitude (Note1, 2) Clock Width (Note1, 2) Sync Threshold Sync Input Current Symbol Conditions VREF ∆VREF ∆VREF ISC ∆VREF STT ST TJ = 25°C VCC = 8 to 35V IREF = 0 to 20mA VREF = 0, TJ = 25°C Line, Load and Temperature TJ = 125°C ,1KHRS ACCUR ∆f/∆VCC f(MAX) f(MIN) V(CLK) tW(CLK) VTH(SYNC) II(SYNC) TJ = 25°C VCC = 8 to 35V (Note1, 2) RT = 2kΩ, CT...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)