UCD8220, UCD8620
www.ti.com
SLUS652B–MARCH 2005–REVISED SEPTEMBER 2005
FUNCTIONAL BLOCK DIAGRAMS
16
NC
1
NC
NC
15
2
14 VDD
CLK
3V3 Regulator
and
3
UVLO
3V3
13 PVDD
Reference
OUT1
12
DRIVE
LOGIC
11 OUT2
4
6
5
ISET
CTRL
AGND
PWM
PWM
10
PGND
7
CLF
CURRENT
LIMIT
CURRENT
8
9
CS
ILIM
SENSE
Figure 6. UCD8220
1
110−V HV
Start−up
and
NC
16
VIN
2
JFET Control
CLK
15
14
13
NC
VDD
3V3 Regulator
and
PVDD
3
UVLO
3V3
Reference
12
OUT1
DRIVE
LOGIC
4
6
5
7
8
ISET
CTRL
AGND
CLF
PWM
11
OUT2
PWM
10
PGND
CURRENT
CURRENT
LIMIT
SENSE
9
CS
ILIM
Figure 7. UCD8620
8