Datasheet

SYNC
C
T
S
R
Q
V
REF
CLOCK
CLOCK
0.2 V
2.5 V
REF
RT
I
RT
CT
R
T
8I
RT
+
+
OSC
Q
Q
Q
QD
Q
Q
S
R
0.5V
11 V / 9 V
Q
QD
Q
D
2 V
2.5 V
REF
4 V
0.5 V
REF
0.5 V / 0.6 V
19
8
7
6
2
20
1
12
5
4
11
16
13
10
14
17
9
18
15
+
3
SS
CS
EAN
EAP
EAOUT
RAMP
SYNC
CT
RT
GND
REF
ADS
OUTD
PGND
DELCD
OUTC
OUTB
DELAB
OUTA
VDD
DELAY C
DELAY D
DELAY A
DELAY B
Q
HI=ON
I
RT
10(I
RT
)
DISABLE
COMPARATOR
OVER CURRENT
COMPARATOR
ERROR
AMP
CURRENT SENSE
COMPARATOR
PWM
COMPARATOR
S
R
S
R
I
RT
8(I
RT
)
NO LOAD
COMPARATOR
HI=ON
S
R
0.8 V
ADAPTIVE DELAY
SET AMPLIFIER
UVLO COMPARATOR
REFERENCE OK
COMPARATOR
+
+
+
+
+
+
+
+
+
UCC1895, UCC2895, UCC3895
SLUS157P –DECEMBER 1999–REVISED JUNE 2013 www.ti.com
BLOCK DIAGRAM
Figure 3. Oscillator Block Diagram
8 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: UCC1895 UCC2895 UCC3895