viper20b STMicroelectronics, viper20b Datasheet - Page 6

• Manufacturer Part Number: viper20b
• Description: Smps Primary I.c.
• Manufacturer: STMicroelectronics

VIPer20B / VIPer20BSP
6/17
Figure 1: V
Figure 3: Transition Time
V
I
I
I
COMPLO
DS
COMPHI
COMP
I
D
0
DD
90% V
Regulation Point
tf
10% V
D
10% Ipeak
D
V
DDreg
Gm in mA/V
Slope =
tr
FC00150
FC00160
t
t
V
DD
Figure 2: Undervoltage Lockout
Figure 4: Shut Down Action
I
I
I
DDch
DD0
DD
V
V
COMPth
V
COMP
OSC
I
D
V
V
DDhyst
ENABLE
DDoff
t
DISsu
DISABLE
V
V
FC00170
DDon
DS
Fsw = 0
FC00060
ENABLE
= 70 V
t
t
t
V
DD