viper31sp STMicroelectronics, viper31sp Datasheet - Page 6

• Manufacturer Part Number: viper31sp
• Description: Battery Charger Primary I.c.
• Manufacturer: STMicroelectronics

VIPer31SP
6/16
Figure 1: Switching Times
Figure 3: Switching Frequency Setting
VCREF
2.VIN
RS
VIN
1,000
500
300
200
100
50
30
20
ID
VDS
1
Ct = 1.5 nF
Ct = 2.7 nF
Ct = 4.7 nF
Ct = 10 nF
tf
2
Oscillator frequency vs Rt and Ct
3
5
Rt (k )
td
Tr
10
SC12030
t
t
20
Figure 2: UVLO Logic Behaviour
VDDreg
ICCch
ICC0
30
VDD
ICC
50
VDDhyst
VDDoff
CT
RT
OSC
500
VDDon
VDDreg+VDO
+
VDD
GND
-
+
-
+
0.62 VDD
0.25 VDD
SC12050
S
R
Q
SC12040
VCC
VCC