2

UCC3957 -1/-2/-3/-4

All voltages measured with respect to the AN4 terminal.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Supply Section

5.0

5.5

V

Supply Current

30

40

µA

Sleep Mode Supply Current

3.5

7.5

µA

Output Section

DCHG Output Current

40

70

100

µA

–20

–7

–3

mA

CHG Ouput Current

40

70

100

µA

–20

–7

–3

mA

State Transitions

Normal to Overcharge

UCC3957-1

4.15

4.20

4.25

V

Overcharge to Normal

UCC3957-1

3.95

4.00

4.05

V

Normal to Overcharge

UCC3957-2

4.20

4.25

4.30

V

Overcharge to Normal

UCC3957-2

4.00

4.05

4.10

V

Normal to Overcharge

UCC3957-3

4.25

4.30

4.35

V

Overcharge to Normal

UCC3957-3

4.05

4.10

4.15

V

Normal to Overcharge

UCC3957-4

4.30

4.35

4.40

V

Overcharge to Normal

UCC3957-4

4.10

4.15

4.20

V

Undercharge to Normal

2.5

2.6

2.7

V

Normal to Undercharge

2.2

2.3

2.4

V

OV to CHG Delay

(Note 1)

10

17

23

ms

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V

Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA

Output Current (CHG, DCHG) . . . . . . . . . . . . . . . . . . . . . 25mA

WU Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28V

BATLO Input Voltage . . . . . . . . . . . . . . . . . . . . . . –0.3V to 2.5V

AN1 and AN3 Input Voltage . . . . . . . . . . . . . . . . . VAN4 – VDD

CLCNT and CHGEN . . . . . . . . . . . . . . . . . . . . . . . VAN4 – VDD

Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C

Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C

Unless otherwise indicated, voltages are referenced to AN4.

Currents are positive into, negative out of the specified terminal.

Consult Packaging Section of Databook for thermal limitations

and considerations of packages.

DESCRIPTION (continued)

If at the end of the blanking time the overcurrent condi-

tion still exists, the external discharge FET is turned off

for a period 17 times longer than the first blanking pe-

riod, and then the discharge FET is turned back on. If at

any time a second higher overcurrent threshold is ex-

ceeded for more than a user programmable time, the dis-

charge FET is turned off, and will remain off for the same

period as the first tier off time. This two tiered overcurrent

protection scheme allows for charging capacitive loads

while retaining effective short circuit protection.

CDLY2

AVDD

DVDD

DCHG

CHG

CDLY1

AN4

CHGEN

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

CLCNT

VDD

BATLO

AN3

AN4

WU

AN1

AN2

CONNECTION DIAGRAM

SSOP-16 (Top View)

M Package