Os motores de busca de Datasheet de Componentes eletrônicos |
|
UC1844AAY Folha de dados(PDF) 7 Page - Microsemi Corporation |
|
UC1844AAY Folha de dados(HTML) 7 Page - Microsemi Corporation |
7 / 8 page C URRENT M ODE PWM C ONTROLLER UC184xA/284xA/384xA PRODUCT DA T ABOOK 1996/1997 7 Copyright © 1995 Rev. 1.2 12/95 P RODUCTION D AT A S HEET TYPICAL APPLICA TION CIRCUITS (continued) FIGURE 6. — SLOPE COMPENSATION FIGURE 7. — OPEN LOOP LABORATORY FIXTURE 2 3 4 8 7 6 5 COMP V FB I SENSE R TCT V REF V CC OUTPUT GROUND 0.1µF 0.1µF A UCx84xA R T 2N2222 100K 4.7K 1K 4.7K 5K I SENSE ADJUST ERROR AMP ADJUST C T 1K GROUND OUTPUT V CC V REF 1 OSCILLATOR V REF GOOD LOGIC S R 5V REF INTERNAL BIAS 8(14) 4(7) 2(3) 1(1) R F C F R d R i From V O R SLOPE 2N222A R T 5V UVLO 2.5V ERROR AMP C T 1V 2R R C.S. COMP PWM LATCH 5(9) 3(5) 5(8) CR S R 6(10) 7(11) 7(12) V CC DC BUS V O Q1 UCx84xA Due to inherent instability of current mode converters running above 50% duty cycle, slope compensation should be added to either the current sense pin or the error amplifier. Figure 6 shows a typical slope compensation technique. High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be connected 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. |
Nº de peça semelhante - UC1844AAY |
|
Descrição semelhante - UC1844AAY |
|
|
Ligação URL |
Privacy Policy |
ALLDATASHEETPT.COM |
ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |