Datasheet.kr   

UCC3895 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 UCC3895
기능 BiCMOS Advanced Phase Shift PWM Controller
제조업체 Unitrode
로고 Unitrode 로고 


전체 10 페이지

		

No Preview Available !

UCC3895 데이터시트, 핀배열, 회로
application
INFO
available
BiCMOS Advanced Phase Shift PWM Controller
UCC1895
UCC2895
UCC3895
FEATURES
Programmable Output Turn-on Delay
Adaptive Delay Set
Bidirectional Oscillator Synchronization
Capability for Voltage Mode or Current
Mode Control
Programmable Soft Start/Soft Stop
and Chip Disable via a Single Pin
0% to 100% Duty Cycle Control
7MHz Error Amplifier
Operation to 1MHz
Low Active Current Consumption
(5mA Typical @ 500kHz)
Very Low Current Consumption
During Undervoltage Lock-out
(150µA typical)
DESCRIPTION
The UCC3895 is a phase shift PWM controller that implements control of a
full-bridge power stage by phase shifting the switching of one half-bridge
with respect to the other. It allows constant frequency pulse-width modula-
tion in conjunction with resonant zero-voltage switching to provide high effi-
ciency at high frequencies. The part can be used either as a voltage mode
or current mode controller.
While the UCC3895 maintains the functionality of the UC3875/6/7/8 family
and UC3879, it improves on that controller family with additional features
such as enhanced control logic, adaptive delay set, and shutdown capabil-
ity. Since it is built in BCDMOS, it operates with dramatically less supply
current than it’s bipolar counterparts. The UCC3895 can operate with a
maximum clock frequency of 1MHz.
The UCC3895 and UCC2895 are offered in the 20 pin SOIC (DW) pack-
age, 20 pin PDIP (N) package, 20 pin TSSOP (PW) package, and 20 pin
PLCC (Q). The UCC1895 is offered in the 20 pin CDIP (J) package, and 20
pin CLCC package (L).
SIMPLIFIED APPLICATION DIAGRAM
1 EAN
UCC3895
EAP 270
2 EAOUT
SS/DISB 19
3 RAMP
OUTA 18
4 REF
OUTB 17
5 GND
PGND 16
6 SYNC
VCC 15
7 CT
OUTC 14
8 RT
OUTD 13
9 DELAB
CS 12
10 DELCD
ADS 11
Q1
VBIAS
A
B
VOUT
C
VIN
D
SLUS157A - DECEMBER 1999
UDG-98139




UCC3895 pdf, 반도체, 판매, 대치품
UCC1895
UCC2895
UCC3895
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VDD=12V, RT=82k, CT=220pF, RDELAB=10k,
RDELCD=10k, CREF=0.1µF, CVDD=1.0µF, no load at outputs. TA = TJ. TA = 0°C to 70°C for UCC3895x, –40°C to +85°C for
UCC2895x, and –55°C to +125°C for UCC1895x.
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
Soft Start/Shutdown Section
Soft Start Source Current
SS/DISB = 3.0V, CS < 1.9V
–40 –35 –30 µA
Soft Start Sink Current
SS/DISB = 3.0V, CS > 2.6V
325 350 375 µA
Soft Start/Disable Comparator Threshold
0.44 0.50 0.56 V
Delay Set Section
DELAB/DELCD Output Voltage
ADS = CS = 0V
0.45 0.50 0.55 V
ADS = 0V, CS = 2.0V
1.9 2.0 2.1
V
Output Delay
ADS = CS = 0V (Note 2)
450 525 600 ns
ADS Bias Current
0V < ADS < 2.5V, 0V < CS < 2.5V
–20 20 µA
Output Section
VOH (all outputs)
IOUT = –10mA, VDD to Output
250 400 mV
VOL (all outputs)
IOUT = 10mA
150 250 mV
Rise TIme
Fall Time
CLOAD = 100pF
CLOAD = 100pF
20 35 ns
20 35 ns
Note 1: Minimum phase shift is defined as followed:
Φ = 200 tf (OUTA) tf (OUTC ) Or
tPERIOD
Φ = 200 tf (OUTB ) tf (OUTD) where
tPERIOD
tf(OUTA) = falling edge of OUTA signal
tf(OUTB) = falling edge of OUTB signal
tf(OUTC) = falling edge of OUTC signal
tf(OUTD) = falling edge of OUTD signal
t(PERIOD) = period of OUTA or OUTB signal
tPERIOD
tDELAY = tf(OUTA) – tf(OUTC)
OUTA
Same applies to OUTB and OUTD
OUTC
Note 2. Output delay is measured between OUTA/OUTB or
OUTC/OUTD. Output delay is defined as shown below,
where:
tf(OUTA) = falling edge of OUTA signal
tr(OUTB) = rising edge of OUTB signal
Note 3: Guaranteed by design. Not 100% tested in production.
OUTA
tDELAY = tf(OUTA) – tr(OUTB)
OUTB
Same applies to OUTC and OUTD
4

4페이지










UCC3895 전자부품, 판매, 대치품
BLOCK DIAGRAM
UCC1895
UCC2895
UCC3895
RT 8
CT 7
IRT
8(IRT)
Q
OSC
Q
SYNC 6
RAMP 3
PWM
COMPARATOR
0.8V
DSQ
RQ
D SQ
RQ
DELAY A
DELAY B
EAOUT 2
EAP 20
ERROR
AMP
EAN 1
2V
CURRENT SENSE
COMPARATOR
CS 12
2.5V
OVER CURRENT
COMPARATOR
REF
IRT
SS 19
10(IRT)
HI=ON
HI=ON
NO LOAD
COMPARATOR
0.5V/
0.6V
DSQ
RQ
DELAY C
DELAY D
QS
Q
0.5V
R
DISABLE
COMPARATOR
ADAPTIVE DELAY
SET AMPLIFIER
UVLO COMPARATOR
11V/9V
REFERENCE OK
COMPARATOR
4V
REF
15 VDD
18 OUTA
9 DELAB
17 OUTB
14 OUTC
10 DELCD
13 OUTD
16 PGND
11 ADS
0.5V
4 REF
5 GND
UDG-98140
7

7페이지



구       성총 10 페이지
다운로드[ UCC3895.PDF 데이터시트 ]
구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 )

휴대전화 : 010-3582-2743


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877, [ 홈페이지 ]



링크공유

링크 :

관련 데이터시트

부품번호상세설명 및 기능제조사
UCC3890

Off-Line Battery Charger Circuit

Texas Instruments
Texas Instruments
UCC3895

BiCMOS Advanced Phase Shift PWM Controller

Unitrode
Unitrode

DataSheet.kr    |   2019   |  연락처   |  링크모음   |   검색  |   사이트맵