3

Package Pin Description

PACKAGE PIN #

PIN SYMBOL

FUNCTION

Flip-Chip

16 Lead

(Bump #)

SO Wide

1

13

OUT

Output control of darlington driver.

2

15

S

Current sense feedback input.

3

16

CS

Stall timer capacitor.

4

1

MB

Master current bias resistor.

5

2,3,6,7,10,14

NC

No connection.

6

4

CR

Reset capacitor.

7

5

IN+

Input control.

8

IN-

Negative input control (grounded in 16 Lead SO package).

9

8

Gnd

Ground.

10

9

Input supply voltage.

11

11

D

Darlington drive supply input.

12

12

IC

Input collector voltage sense.

13

TEST

Test bump, grounded.

+

−

+

−

+

−

+

−

−

+

+

−

330

Ω

Power

Supply

Gnd

VR

VBG

OVS

PNP Current Source Bias

VR

MB

RMB

10.7k

CR

0.1

µF

CR

VR

8.4

µA

33.6

µA

25%

CS

25%

CS

0.47

µF

VR

149

µA

1.1

µA

VR

149k

31.9

µA

P2

RIN+

10k

+

−

IN+

Negative

Edge

Filter

LOGIC1

C

Q

D

R

Combinational

Logic

INPUT

25%

STALL

VR

BG

CS

8k

CR

BG

CR

5k

63.7k

7k

12k

BG

100k

VR

N1

N2

N3

BG

2.55k

0.63k

To CR, CS Current Sources

DWELL

VR

OVS

N4

N5

P1

D

OUT

IC

13.7V

Clamp

ND1

ND2

Spark Plug

RD

55

Ω, 5W

S

25%

25%

∗Stall

VIN

0.1

µF

ZD

18V

RIC2

4k

RIC1

200

Ω

RS2

0.05

Ω, 5W

RS1

56

Ω

Adjust for 6.5A Coil Current

Block Diagram