Datasheet

STATUS
GND
V
FB
V
CS
V
OVP
V
OUT
V
DD
I
DD
I
OVP
R
OVP
500 Ω
C
OUT
1.0 nF
R
OUT
10 Ω
C
BIAS
1 µF
C
DD
100 nF
I
CS
C
FB
47 pF
C
SS
3.3 nF
C
CST
560 pF
See Note
R
CST
37.4 kΩ
See Note
SS
VDD
GND
OUT
FB
CS
OVP
STATUS
UCC28600
+
1
2
3
4 5
6
7
8
5 V
2
1
6
5.0
VREF
SS
VDD
4
GND
5
OUT
FB
1.5R
8
3
CS
UVLO
+
C
BULK
Feedback
20kW
C
SS
7
OVP
On-Chip
Thermal
Shutdown
REF
26V
R
STATUS
13/8V
R
CS
R
OVP1
R
OVP2
C
VDD
+
400mV
REF
R
SU
+
Q
Q
SET
CLR
D
REF
GAIN=1/2.5
+
Modulation
Comparison
UCC28600
FaultLogic
LINE_OVP
LOAD_OVP
REF_OK
RUN
UVLO
CS
OVR_T
STATUS
SS_DIS
GREENMODE
FB_CLAMP
OSC_CL
FB
QRDETECT
LOAD_OVP
LINE_OVP
QR_DONE
____
OUT
CS
OSCILLATOR
QR_DONE
CLK
RUN
SS_OVR
OSC_CL
R
PL
PL
1.2V
SS_OVR BURST BURST
R
VDD
VDD
UCC28600
www.ti.com SLUS646J –NOVEMBER 2005– REVISED JULY 2011
OPEN LOOP TEST CIRCUIT
NOTE
R
CST
and C
CST
are not connected for maximum and minimum duty cycle tests, current
sense tests and power limit tests.
BLOCK DIAGRAM/TYPICAL APPLICATION
Copyright © 2005–2011, Texas Instruments Incorporated 5