Datasheet

UCC2897A
SLUS829D -- AUGUST 2008 -- REVISED JULY 2009
6
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FUNCTIONAL BLOCK DIAGRAM
I
RDEL
1--D
MAX
1--D
MAX
I
SLOPE
I
CHG
I
DSCHG
5 × I
SLOPE
4 × R
R
0.05 × I
RDEL
I
RDEL
0.05 × I
RDEL
0.43 × I
CHG
V
REF
V
REF
V
REF
V
REF
V
REF
V
REF
I
RDEL
3
4
5
19
17
15
13
12
RDEL
GND
RON LINEUV
SS/SD
OUT
AUX
6
ROFF
7
SYNC
18
VDD
VREF
8
9
CS
14
PGND
11
FB
10
RSLOPE
Turn -- on Delay
Turn -- on Delay
1.27 V
Q
QR
S
Start
End
CT
CLOCK
REF
GEN
VDD
LINEOV
LineUV
UVLO & SS
Enable
13V / 8V
VDD
VDD
+
VREF
LineUV
2.5V
OUT
PWM
OFF
OUT
LineOV
0.5V
CT
2.5V
2.5V
SYNC
1.27 V
LineOV
N/C
16
PVDD
20
VIN
N/C
2
1
0.43 × I
CHG
Note: Pin numbers shown are for PW (TSSOP--20) package.