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

5

Figure 1 : Charger Current vs. VCAP Voltage

200

240

280

320

360

400

1

02

34

5

VCAP (V)

I

CHG vs. VCAP (RCHG = 12 k

)

Figure 2 : Charger Current vs. VCAP Voltage

0

40

80

120

160

200

012345

VCAP (V)

I

CHG vs. VCAP (RCHG = 38.3 k)

Typical Performance Characteristics (CIN = 22 µF, CSYS = 22 µF, RLIMT = 13 kΩ, RCHG = 12 kΩ, TA = +25 °C)

Figure 3 : Charger VIN Power on

Figure 4 : Charger VIN Power off

VCAP

VSYS

1 V/div

1V/div

10 ms/div

VIN = 5 V

ICHG = 0.3 A

ISYS = 0.5 A

PFLTB

IIN

2 V/div

500 mA/div

VCAP

VSYS

1 V/div

1 V/div

VIN = 5 V

1 ms/div

ICHG = 0.3 A

ISYS = 0.5 A

PFLTB

IIN

2 V/div

500 mA/div

Figure 5 : Charging Time (SuperCap1 = SuperCap2 = 20 F)

Figure 6 : Discharger Time (SuperCap1 = SuperCap2 = 20 F)

VCAP

VSYS

1 V/div

1 V/div

VIN= 5 V

20 s/div

ICHG = 0.3 A

ISYS = 0.5 A

PFLTB

IIN

2 V/div

500 mA/div

VCAP

VSYS

1 V/div

1 V/div

20 s/div

VIN = 5 V

ICHG = 0.3 A

ISYS = 0.5 A

PFLTB

IIN

2 V/div

500 mA/div