UCC39571, UCC39572, UCC39573, UCC39574

SLUS236B – JANUARY 1999 – REVISED SEPTEMBER 2002

2

www.ti.com

block diagram

UDG–00129

1

3

2

CELL

VOLTAGE

SELECT

OVERCURRENT

CONTROLLER

4

6

5

7

8

REFERENCE

VOLTAGE

SELECT AND

COMPARE

REF

STATE

MACHINE

CLOCK

SQ

R

+

AN4

VDD

BATLO

AN3

AN2

AN1

CLCNT

WU

VDD

UV

SLEEP

16

14

15

13

11

12

10

9

CDLY1

CHGEN

AN4

CHG

AVDD

CDLY2

DVDD

DCHG

Supply voltage (VDD)

20 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply current

25 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current

25 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage:

(WU)

24 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(AN1, AN2, AN3)

VAN4 – VDD

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(CLCNT, CHGEN)

15 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range (BATLO)

–0.3 V to 2.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–55

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature (soldering, 10 seconds)

300

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

‡ Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals. Consult

Packaging Information section of the Portable Products Databook (TI Literature No. SLUD001) for thermal limitations and considerations of

packages. All voltages are referenced to the AN4 terminal.

AVAILABLE OPTIONS

T

PACKAGED DEVICES†

SSOP (M)

TA

NORMAL TO OVERCHARGE VOLTAGE (V)

4.20

4.25

4.30

4.35

–20

°C to 70°C

UCC3957M–1

UCC3957M–2

UCC3957M–3

UCC3957M–4

† The M package is available taped and reeled. Add TR suffix to device type (e.g.

UCC3957M–1TR) to order quantities of 2500 devices per reel.

Not Recommended for New Designs