Functional Characteristics
VFB Characteristics for Over Voltage Protection
4.2
V Characteristics for Over Voltage Protection
FB
Figure 8: I vs. V (OVP)
Figure 9: V
vs. Temperature
DD
FB
FB_OVP
3.0
2.5
2.0
1.5
1.0
0.5
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
OVP Threshold
Recovery Threshold
VFB Falling
VFB Rising
0.0
-40
2.0
2.2
2.4
2.6
2.8
3.0
-20
0
20
Temperature
40
60
80
VFB (V)
(
ꢀ
C)
Test Conditions:
FSW = 118kHz
CGate = 1nF
V_Isns = 0V
Test Conditions:
FSW = 118kHz
CGate = 1nF
V_Isns = 0V
V
= 12V
VDD = 12V
VIN = 0V
DD
VIN = 0V
Figure 10: V
Hysteresis vs. Temperature
Figure 11: V
vs. Temperature
FB_OVP_LATCH
FB_OVP
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.30
0.25
0.20
0.15
0.10
0.05
0.00
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
Temperature (°C)
Temperature (ꢀC)
Test Conditions:
FSW = 118kHz
CGate = 1nF
V_Isns = 0V
FSW = 118kHz
CGate = 1nF
V_Isns = 0V
Test Conditions:
VDD = 12V
VIN = 0V
VDD = 12V
VIN = 0V
Copyright © 2009 Marvell
September 30, 2009, 2.00
Doc. No. MV-S104861-01 Rev. –
Page 23
Document Classification: Proprietary
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
