參數(shù)資料
型號(hào)： 5962-8670402VXA
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20
封裝： CERAMIC, LCC-20
文件頁(yè)數(shù)： 23/25頁(yè)
文件大?。?/td> 745K
代理商： 5962-8670402VXA
www.ti.com
OPEN-LOOP LABORATORY FIXTURE
4.7 kW
1 kW
ERROR AMP
ADJUST
4.7 kW
5 kW
ISENSE
ADJUST
2N2222
100 kW
R1
1
2
3
4
8
7
6
5
COMP
UC1842
VFB
ISENSE
RT / CT
CT
0.1 mF
A
1 kW 1 W
VREF
VCC
OUTPUT
GROUND
VREF
VCC
OUTPUT
GROUND
SHUTDOWN TECHNIQUES
8
3
1 kW
330 W
SHUTDOWN
500 W
To Current
SENSE RESISTOR
VREF
ISENSE
1
SHUTDOWN
COMP
SLUS223C – APRIL 1997 – REVISED JUNE 2007
High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypas
capacitors should be conected close to pin 5 in a single point ground. The transistor and 5k potentiometer are
used to sample the oscillator waveform and apply an adjustable ramp to pin 3.
Shutdown of the UC1842 can be accomplished by two methods; either raise pin 3 above 1 V or pull pin 1 below
a voltage two diode drops above ground. Either method causses the output of the PWM comparator to be high
(refer to block diagram). The PWM latch is reset dominant so that the output will remain low until the next clock
cycle after the shutdown condition at pin 1 and/or 3 is removed. In one example, an externally latched shutdown
may be accomplished by adding an SCR which will be reset by cycling VCC below the lower UVLO threshold. At
this pint the reference turns off, allowing the SCR to reset.
7
相關(guān)PDF資料
PDF描述
5962-8670401XA 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20
5962-8670403PA 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8
5962-8670401VXA 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20
5962-8670404XA 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CQCC20
5962-8670402PA 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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5962-86704032A 制造商:LINF 功能描述:_
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5962-8670403PA 制造商:Microsemi Corporation 功能描述:Current Mode PWM Controller 200mA 8-Pin CDIP 制造商:Texas Instruments 功能描述:Current Mode PWM Controller 1A 8-Pin CDIP Tube 制造商:Texas Instruments 功能描述:CURRENT MODE PWM CNTRLR 1A 8CDIP - Rail/Tube
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