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PDF FAN8903 Data sheet ( Hoja de datos )

Número de pieza FAN8903
Descripción Power Window Motor Control IC
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! FAN8903 Hoja de datos, Descripción, Manual

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

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FAN8903 pdf
FAN8903(KA3903)
Application Information
FAN8903
BAT.
UVLO & REFERENCE
UP
DOWN
START KEY
INPUT
BASIC FUNCTIONS
LOGIC
TIMING
OUTPUT
SPECIAL FUNCTIONS
KEY-OFF
MODE SELECTION
OCP
PRETECTION FUNCTIONS
OVP
HUMAN BODY
POWER
STAGE
M
WINDOW
FRAME
S/W
POWER WINDOW SYSTEM
General
When the start-key is turned on by operator, the FAN8903 will wait the command up or down of the window.
Upon the command up, the power stage composed of relays will be activated by basic function circuit which consists of input,
logic, timing and output circuit.
So the motor starts to rotate in the right direction to lift the window, while rotate in the counter direction with the command
down to down the window.
The OCP (over current protector) is made up to protect the motor in an abnormal condition of the system during the rotation of
motor according to the command up or down.
The OCP time technique is used to detect over current not sensitive to a start peak current or a current slightly lager than the
reference current.
The FAN8903 is based on the safety by consisting of the human body protection circuit with a simple switch attached to the
window frame for cost-effective method but hard to the european specification. It also is possible to use photo sensor to meet
the specification.
Moreover the FAN8903 has the car-key turn-off function and the mode selection function.
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FAN8903 arduino
FAN8903(KA3903)
Power Supply
For the reasons of interference protection and surge immunity, all circuit should be provided with a RC circuit for a current
limitation in the event of overvoltage and for buffering in the event of voltage dips at Vref.
Suggested dimensioning; Rin=180, Cin=47µF, as shown in the typical applications.
There ia a 18.6V zener diode between VCC and GND.
Load Dump Protection
The load dump protection withstands up to 70V (refer to the typical application-I) with a decay time.
In this case, the power dissipation of the FAN8903 takes please at three parts; VCC, OUT1 and OUT2.
But in the typical application-II, the supply voltage of the relay is limited the internal zener diode voltage.
The power dissipation of the output stage is not on count. So the FAN8903 can withstand up to 100V load dump with τ=
200ms.
1. REVERSE BATTERY VOLTAGE PROTECTION
In case of the reverse battery, the FAN8903 is modeled with a diode. Due to the external impedance at pin #16, the FAN8903
is protected against reverse battery voltage for one minute (or continuously).
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