SI786 Vishay, SI786 Datasheet - Page 11

• Manufacturer Part Number: SI786
• Description: Dual-output Power-supply Controller
• Manufacturer: Vishay

Document Number: 70189
S-40807—Rev. J, 26-Apr-04
(or Internal 5-V
Reference)
REF, 3.3 V
ON_
SS_
25 mV
4 mA
Slope
Comp
Synchronous
Rectifier Control
FIGURE 3. Si786 Controller Block Diagram
3.3 V
Minimum Current
(Pulse-Skipping)
60 kHz
LPF
Summing
Comparator
30R
1R
V
R
S
L
Q
0 mV to
100 mV
Current
Limit
1X
R
S
Q
OSC
Through
Control
Shoot-
Level
Level
Vishay Siliconix
Shift
Shift
CS
_
FB_
BST_
DH
_
LX_
V
DL_
PGND
L
www.vishay.com
Si786
11