Protection IC Datasheet

© 2024 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: JC. 08/12/24

LS0502SCD33

Super Capacitor Protection IC for Backup Power Applications

6

Figure 7 : Charger Mode VCAP Short

Figure 8 : Charger TC Mode* -> CC Mode

VCAP

VSYS

1 V/div

1 V/div

VIN = 5 V

400 ms/div

ICHG = 0.3 A

ISYS = 0 A

VIN

ICAP = 0 A~short

IIN

1 V/div

1 A/div

VCAP

VSYS

1 V/div

1 V/div

VIN = 5 V

2 ms/div

ICHG = 0.15 A 0.3 A

I SYS = 0.5 A

PFLTB

IIN

1 V/div

500 mA/div

VCAP

VSYS

1 V/div

2 V/div

10 s/div

VIN= 5.6 V OVP

ICHG = 0.3 A

VIN

I SYS = 0.5 A

IIN

2 V/div

500 mA/div

Figure 9 : Charger 4VIN Switch to 5VIN

(Setting VIN_UVLO 4.1 V )

Figure 10 : VIN OVP Protection

Figure 11 : VIN OVP Recovery

VCAP

VSYS

1 V/div

2 V/div

4 s/div

ICHG= 0.3 A

VIN = OVP Recovery

VIN

ISYS = 0.5 A

IIN

2 V/div

500 mA/div

VCAP

VSYS

1 V/div

1 V/div

VIN = 5 V

200 ms/div

ICHG = 0.3 A

ISYS = 0.5 A

PFLTB

IIN

2 V/div

500 mA/div

Note: *Refer to LS0502SCD33S