bq2031

Impedance

Symbol Parameter Minimum Typical Maximum Unit Notes

BATZ

BAT pin input impedance 50 - - M

Ω

SNSZ

SNS pin input impedance 50 - - M

Ω

TSZ

TS pin input impedance 50 - - M

Ω

PROG1

Soft-programmed pull-up or pull-down

resistor value (for programming)

--10

Ω

DSEL, TSEL, and

QSEL

PROG2

Pull-up or pull-down resistor value - - 3 k

Ω

IGSEL

MTO

Charge timer resistor 20 - 480 k

Ω

Timing (T

= T

OPR

= 5V

10%)

Symbol Parameter Minimum Typical Maximum Unit Notes

MTO

Charge time-out range 1 - 24 hours See Figure 9

QT1

Pre-charge qual test 1 time-out period - 0.02t

MTO

QT2

Pre-charge qual test 2 time-out period - 0.16t

MTO

∆

V termination sample frequency - 0.008t

MTO

H01

Pre-charge qual test 2 hold-off period - 0.002t

MTO

H02

Bulk charge hold-off period - 0.015t

MTO

PWM

PWM regulator frequency range - 100 kHz See Equation 9

Capacitance

Symbol Parameter Minimum Typical Maximum Unit

MTO

Charge timer capacitor - 0.1 0.1

PWM

PWM R-C capacitance - 0.001 -

bq2031

16-Pin SOIC Narrow (SN)

.004

16-Pin SN

(

0.150" SOIC

)

Dimension

Inches Millimeters

Min. Max. Min. Max.

A 0.060 0.070 1.52 1.78

A1 0.004 0.010 0.10 0.25

B 0.013 0.020 0.33 0.51

C 0.007 0.010 0.18 0.25

D 0.385 0.400 9.78 10.16

E 0.150 0.160 3.81 4.06

e 0.045 0.055 1.14 1.40

H 0.225 0.245 5.72 6.22

L 0.015 0.035 0.38 0.89

16-Pin PN

(

0.300" DIP

)

Dimension

Inches Millimeters

Min. Max. Min. Max.

A 0.160 0.180 4.06 4.57

A1 0.015 0.040 0.38 1.02

B 0.015 0.022 0.38 0.56

B1 0.055 0.065 1.40 1.65

C 0.008 0.013 0.20 0.33

D 0.740 0.770 18.80 19.56

E 0.300 0.325 7.62 8.26

E1 0.230 0.280 5.84 7.11

e 0.300 0.370 7.62 9.40

G 0.090 0.110 2.29 2.79

L 0.115 0.150 2.92 3.81

S 0.020 0.040 0.51 1.02

16-Pin DIP Narrow (PN)

bq2031

Change No. Page No. Description Nature of Change

1 Descriptions Clarified and consolidated

1 Renamed

Dual-Level Constant Current Mode to Two-Step Current Mode

MCV

to V

HCO

INT

to V

LCO

UV1

to t

QT1

UV2

to t

QT2

1 Consolidation Tables 1 and 2

1 Added figures

Start-up states

Temperature sense input voltage thresholds

Pulsed maintenance current implementation

1 Updated figures Figures 1 through 6

1 Added equations Thermistor divider network configuration equations

1 Raised condition MOD V

and V

parameters from

≤

5mA to

≤

1 Corrected Conditions VSNS rating from V

MAX

and V

MIN

to I

MAX

and I

MIN

1 Added table Capacitance table for C

MTO

and C

PWM

Changed values in

Figure 5

Was 51K; is now 10K

3 7, 10

Changed values

in Equations 3 and 8

Was: I

MAX

= 0.275V/R

SNS

; is now I

MAX

= 0.250V/R

SNS

Changed values

in Equation 4

Was: (V

- 0.275); is now (V

- 0.250V)

311

Changed rating value

for V

SNS

in DC

Thresholds table

Was 0.275; is now 0.250

411T

OPR

Deleted industrial temperature range.

Notes: Change 1 = Dec. 1995 B changes from June 1995 A.

Change 2 = Sept. 1996 C changes from Dec. 1995 B.

Change 3 = April 1997 D changes from Sept. 1996 C.

Change 4 = June 1999 E changes from April 1997 D.

Data Sheet Revision History

bq2031

Package Option:

PN = 16-pin plastic DIP

SN = 16-pin narrow SOIC

Device:

bq2031 Lead Acid Charge IC

Ordering Information

Part #	BQ2031SN-A5
Description	IC, LEAD ACID FAST CHARGE16-PIN SOIC
Category	IC
Availability	In Stock
Qty	56

Qty	Price
1 - 11	$6.09344
12 - 23	$4.84705
24 - 35	$4.57008
36 - 47	$4.24694
48 +	$3.78532

BQ2031SN-A5

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Technical Document