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FAN8903(KA3903)

Power Window Motor Control IC

www.fairchildsemi.com

Features

• Protections

- Human body protection with a simple switch

- Over current protection with an integrator

- Over voltage protection

- Load dump protection

- Reverse battery voltage protection

• Low off-state quiescent current (150µA)

• Adjustable output control time after

car-key turn-off

• Four selectable operating modes

• Thermal shutdown (TSD)

• Under voltage lockout

Description

The FAN8903 is a monolithic integrated circuit, suitable for

a window motor control and sun roof motor control in auto-

motive systems.

16-DIP-300A

Typical Applications

• Power Window

• Sun Roof

Ordering Information

Device Package Operating Temperature

FAN8903 16-DIP-300A

−40°C ~ +90°C

©2001 Fairchild Semiconductor Corporation

Rev. 1.0.2

FAN8903(KA3903)

Absolute Maximum Rating

Parameter

Supply voltage 1

Supply voltage 2: reverse bias

Output current

Power dissipation

Operating ambient temperature

Storage temperature

Symbol

VCC1

VCC2

IO

PD

TOPR

TSTG

Value

17

−0.7

400

1.0

−40 ~ +90

−60 ~ +150

Electrical Characteristics

(VCC=12V, Ta=25°C, unless otherwise specified)

Parameter

Symbol

Conditions

UNDER VOLTAGE LOCK SECTION

Start-up threshold voltage

VST

-

UVLO hysteresis

VHYS

-

Supply zener voltage

VZ ICC=20mA

OPERATING RANGE SECTION

Operating supply voltage

VCC VREF=5V

Operating supply current (Off)

ICC1 VSTART=Open

Operating supply current (On)

ICC2 VSTART=12V

REFERENCE SECTION

Reference voltage

VREF

-

Line regulation

REG, II 8V < VCC < 17V

Load regulation

REG, IO 0mA < IREF < 2mA

COMPARTOR SECTION (UP/DOWN/FG BLOCK)

Input resistance

RIN VUP, VDOWN, VFC=0V

Comparing reference voltage 1 VTH1 Vout on / off S/W Vtg

COMPARATOR SECTION (CT BLOCK)

Comparing reference voltage 2 VTH2 4.2V < VCT < 4.6V

OUTPUT SECTION

Output saturation voltage

VSAT IO=0.2A

Sustain voltage

VSUS IO=20mA

OP AMP SECTION

AMP reference voltage

VAMP VCS=Vouta

Output voltage range

VOUTH IO=−10µA

VOUT1 IO=+10µA

Min.

8.3

1.1

17.2

8.0

-

-

4.8

-

-

20

3.0

4.2

-

17.2

0.23

4.0

-

Typ.

8.8

1.25

18.6

-

150

5.0

5.0

1

1

28

3.2

4.4

1.0

18.6

0.25

4.2

0.05

Unit

V

V

mA

W

°C

°C

Max.

Units

9.3 V

1.6 V

20.0 V

17.0 V

200 µA

6.0 mA

5.2 V

2 mV / V

4 mV / mA

36 kΩ

3.4 V

4.6 V

1.2 V

20.0 V

0.27 V

-V

0.1 V

4

FAN8903(KA3903)

Car-key Turn-off Function

The window can be operated for a certain period even in the state of the start-key to be off. If the start-key is turned off, the dis-

charge time for the voltage V1 to pin #15 will be determined by the following time constant.

τ = (R1 + R2)C1

User can get a time he wants as the discharge time for the voltage V1 by changing the capacity of the cap (C1) and the values

of the resistances (R1 or R2).

Therefore, the user can operate the window for a limited time (about 30sec) even if the start-key is turned off

Mode Selection

Mode

Pin Name

M1 M2

Operation

UP DOWN

LL-MODE

L L Normal

Normal

LH-MODE

L H Normal

Toggle & Auto

HL-MODE

H L Normal

Toggle, step & Auto

HH-MODE

H

H

Toggle, step & Auto

Toggle, step & Auto

Notes:

1. L : M1 or M2 = Ground, H : M1 or M2 = Open

2. NORMAL: The window is working as long as the up or down switch is pressed.

3. TOGGLE: When the window works by pressing the up or down switch, the window is stopped if the up or down switch is

pressed once more.

4. STEP & AUTO: If the up or down switch is pressed for a certain period (0.3 seconds), the window works for 0.3 seconds,

while 6 seconds if pressed for more than a certain period (0.3 seconds).

Over Voltage Protection(OVP)

It is designed stop the control of the FAN8903 if battery voltage is sensed as about 18.6V or more.

BAT.

12V

FAN8903

Rin

180

16

47µF

18.6V

7

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